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source: palm/trunk/SOURCE/land_surface_model_mod.f90 @ 1963

Last change on this file since 1963 was 1950, checked in by maronga, 8 years ago
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1	!> @file land_surface_model_mod.f90
2	!--------------------------------------------------------------------------------!
3	! This file is part of PALM.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms
6	! of the GNU General Public License as published by the Free Software Foundation,
7	! either version 3 of the License, or (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
10	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
11	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with
14	! PALM. If not, see <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 1997-2016 Leibniz Universitaet Hannover
17	!--------------------------------------------------------------------------------!
18	!
19	! Current revisions:
20	! -----------------
21	!
22	!
23	! Former revisions:
24	! -----------------
25	! $Id: land_surface_model_mod.f90 1950 2016-06-17 07:21:31Z suehring $
26	!
27	! 1949 2016-06-17 07:19:16Z maronga
28	! Bugfix: calculation of qsws_soil_eb with precipitation = .TRUE. gave
29	! qsws_soil_eb = 0 due to a typo
30	!
31	! 1856 2016-04-13 12:56:17Z maronga
32	! Bugfix: for water surfaces, the initial water surface temperature is set equal
33	! to the intital skin temperature. Moreover, the minimum value of r_a is now
34	! 1.0 to avoid too large fluxes at the first model time step
35	!
36	! 1849 2016-04-08 11:33:18Z hoffmann
37	! prr moved to arrays_3d
38	!
39	! 1826 2016-04-07 12:01:39Z maronga
40	! Cleanup after modularization
41	!
42	! 1817 2016-04-06 15:44:20Z maronga
43	! Added interface for lsm_init_arrays. Added subroutines for check_parameters,
44	! header, and parin. Renamed some subroutines.
45	!
46	! 1788 2016-03-10 11:01:04Z maronga
47	! Bugfix: calculate lambda_surface based on temperature gradient between skin
48	! layer and soil layer instead of Obukhov length
49	! Changed: moved calculation of surface specific humidity to energy balance solver
50	! New: water surfaces are available by using a fixed sea surface temperature.
51	! The roughness lengths are calculated dynamically using the Charnock
52	! parameterization. This involves the new roughness length for moisture z0q.
53	! New: modified solution of the energy balance solver and soil model for
54	! paved surfaces (i.e. asphalt concrete).
55	! Syntax layout improved.
56	! Changed: parameter dewfall removed.
57	!
58	! 1783 2016-03-06 18:36:17Z raasch
59	! netcdf variables moved to netcdf module
60	!
61	! 1757 2016-02-22 15:49:32Z maronga
62	! Bugfix: set tm_soil_m to zero after allocation. Added parameter
63	! unscheduled_radiation_calls to control calls of the radiation model based on
64	! the skin temperature change during one time step (preliminary version). Set
65	! qsws_soil_eb to zero at model start (previously set to qsws_eb). Removed MAX
66	! function as it cannot be vectorized.
67	!
68	! 1709 2015-11-04 14:47:01Z maronga
69	! Renamed pt_1 and qv_1 to pt1 and qv1.
70	! Bugfix: set initial values for t_surface_p in case of restart runs
71	! Bugfix: zero resistance caused crash when using radiation_scheme = 'clear-sky'
72	! Bugfix: calculation of rad_net when using radiation_scheme = 'clear-sky'
73	! Added todo action
74	!
75	! 1697 2015-10-28 17:14:10Z raasch
76	! bugfix: misplaced cpp-directive
77	!
78	! 1695 2015-10-27 10:03:11Z maronga
79	! Bugfix: REAL constants provided with KIND-attribute in call of
80	! Replaced rif with ol
81	!
82	! 1691 2015-10-26 16:17:44Z maronga
83	! Added skip_time_do_lsm to allow for spin-ups without LSM. Various bugfixes:
84	! Soil temperatures are now defined at the edges of the layers, calculation of
85	! shb_eb corrected, prognostic equation for skin temperature corrected. Surface
86	! fluxes are now directly transfered to atmosphere
87	!
88	! 1682 2015-10-07 23:56:08Z knoop
89	! Code annotations made doxygen readable
90	!
91	! 1590 2015-05-08 13:56:27Z maronga
92	! Bugfix: definition of character strings requires same length for all elements
93	!
94	! 1585 2015-04-30 07:05:52Z maronga
95	! Modifications for RRTMG. Changed tables to PARAMETER type.
96	!
97	! 1571 2015-03-12 16:12:49Z maronga
98	! Removed upper-case variable names. Corrected distribution of precipitation to
99	! the liquid water reservoir and the bare soil fractions.
100	!
101	! 1555 2015-03-04 17:44:27Z maronga
102	! Added output of r_a and r_s
103	!
104	! 1553 2015-03-03 17:33:54Z maronga
105	! Improved better treatment of roughness lengths. Added default soil temperature
106	! profile
107	!
108	! 1551 2015-03-03 14:18:16Z maronga
109	! Flux calculation is now done in prandtl_fluxes. Added support for data output.
110	! Vertical indices have been replaced. Restart runs are now possible. Some
111	! variables have beem renamed. Bugfix in the prognostic equation for the surface
112	! temperature. Introduced z0_eb and z0h_eb, which overwrite the setting of
113	! roughness_length and z0_factor. Added Clapp & Hornberger parametrization for
114	! the hydraulic conductivity. Bugfix for root fraction and extraction
115	! calculation
116	!
117	! intrinsic function MAX and MIN
118	!
119	! 1500 2014-12-03 17:42:41Z maronga
120	! Corrected calculation of aerodynamic resistance (r_a).
121	! Precipitation is now added to liquid water reservoir using LE_liq.
122	! Added support for dry runs.
123	!
124	! 1496 2014-12-02 17:25:50Z maronga
125	! Initial revision
126	!
127	!
128	! Description:
129	! ------------
130	!> Land surface model, consisting of a solver for the energy balance at the
131	!> surface and a four layer soil scheme. The scheme is similar to the TESSEL
132	!> scheme implemented in the ECMWF IFS model, with modifications according to
133	!> H-TESSEL. The implementation is based on the formulation implemented in the
134	!> DALES and UCLA-LES models.
135	!>
136	!> @todo Consider partial absorption of the net shortwave radiation by the
137	!> skin layer.
138	!> @todo Improve surface water parameterization
139	!> @todo Invert indices (running from -3 to 0. Currently: nzb_soil=0,
140	!> nzt_soil=3)).
141	!> @todo Implement surface runoff model (required when performing long-term LES
142	!> with considerable precipitation.
143	!> @todo Fix crashes with radiation_scheme == 'constant'
144	!>
145	!> @note No time step criterion is required as long as the soil layers do not
146	!> become too thin.
147	!------------------------------------------------------------------------------!
148	MODULE land_surface_model_mod
149
150	USE arrays_3d, &
151	ONLY: hyp, ol, pt, pt_p, prr, q, q_p, ql, qsws, shf, ts, us, vpt, z0, &
152	z0h, z0q
153
154	USE cloud_parameters, &
155	ONLY: cp, hyrho, l_d_cp, l_d_r, l_v, pt_d_t, rho_l, r_d, r_v
156
157	USE control_parameters, &
158	ONLY: cloud_physics, dt_3d, humidity, intermediate_timestep_count, &
159	initializing_actions, intermediate_timestep_count_max, &
160	max_masks, precipitation, pt_surface, &
161	rho_surface, roughness_length, surface_pressure, &
162	timestep_scheme, tsc, z0h_factor, time_since_reference_point
163
164	USE indices, &
165	ONLY: nbgp, nxlg, nxrg, nyng, nysg, nzb, nzb_s_inner
166
167	USE kinds
168
169	USE pegrid
170
171	USE radiation_model_mod, &
172	ONLY: force_radiation_call, radiation_scheme, rad_net, rad_sw_in, &
173	rad_lw_out, rad_lw_out_change_0, sigma_sb, &
174	unscheduled_radiation_calls
175
176	#if defined ( __rrtmg )
177	USE radiation_model_mod, &
178	ONLY: rrtm_idrv
179	#endif
180
181	USE statistics, &
182	ONLY: hom, statistic_regions
183
184	IMPLICIT NONE
185
186	!
187	!-- LSM model constants
188	INTEGER(iwp), PARAMETER :: nzb_soil = 0, & !< bottom of the soil model (to be switched)
189	nzt_soil = 3, & !< top of the soil model (to be switched)
190	nzs = 4 !< number of soil layers (fixed for now)
191
192	REAL(wp), PARAMETER :: &
193	b_ch = 6.04_wp, & ! Clapp & Hornberger exponent
194	lambda_h_dry = 0.19_wp, & ! heat conductivity for dry soil
195	lambda_h_sm = 3.44_wp, & ! heat conductivity of the soil matrix
196	lambda_h_water = 0.57_wp, & ! heat conductivity of water
197	psi_sat = -0.388_wp, & ! soil matrix potential at saturation
198	rho_c_soil = 2.19E6_wp, & ! volumetric heat capacity of soil
199	rho_c_water = 4.20E6_wp, & ! volumetric heat capacity of water
200	m_max_depth = 0.0002_wp ! Maximum capacity of the water reservoir (m)
201
202
203	!
204	!-- LSM variables
205	INTEGER(iwp) :: veg_type = 2, & !< NAMELIST veg_type_2d
206	soil_type = 3 !< NAMELIST soil_type_2d
207
208	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: soil_type_2d, & !< soil type, 0: user-defined, 1-7: generic (see list)
209	veg_type_2d !< vegetation type, 0: user-defined, 1-19: generic (see list)
210
211	LOGICAL, DIMENSION(:,:), ALLOCATABLE :: water_surface, & !< flag parameter for water surfaces (classes 14+15)
212	pave_surface, & !< flag parameter for pavements (asphalt etc.) (class 20)
213	building_surface !< flag parameter indicating that the surface element is covered by buildings (no LSM actions, not implemented yet)
214
215	LOGICAL :: conserve_water_content = .TRUE., & !< open or closed bottom surface for the soil model
216	force_radiation_call_l = .FALSE., & !< flag parameter for unscheduled radiation model calls
217	land_surface = .FALSE. !< flag parameter indicating wheather the lsm is used
218
219	! value 9999999.9_wp -> generic available or user-defined value must be set
220	! otherwise -> no generic variable and user setting is optional
221	REAL(wp) :: alpha_vangenuchten = 9999999.9_wp, & !< NAMELIST alpha_vg
222	canopy_resistance_coefficient = 9999999.9_wp, & !< NAMELIST g_d
223	c_surface = 20000.0_wp, & !< Surface (skin) heat capacity
224	drho_l_lv, & !< (rho_l * l_v)**-1
225	exn, & !< value of the Exner function
226	e_s = 0.0_wp, & !< saturation water vapour pressure
227	field_capacity = 9999999.9_wp, & !< NAMELIST m_fc
228	f_shortwave_incoming = 9999999.9_wp, & !< NAMELIST f_sw_in
229	hydraulic_conductivity = 9999999.9_wp, & !< NAMELIST gamma_w_sat
230	ke = 0.0_wp, & !< Kersten number
231	lambda_h_sat = 0.0_wp, & !< heat conductivity for saturated soil
232	lambda_surface_stable = 9999999.9_wp, & !< NAMELIST lambda_surface_s
233	lambda_surface_unstable = 9999999.9_wp, & !< NAMELIST lambda_surface_u
234	leaf_area_index = 9999999.9_wp, & !< NAMELIST lai
235	l_vangenuchten = 9999999.9_wp, & !< NAMELIST l_vg
236	min_canopy_resistance = 9999999.9_wp, & !< NAMELIST r_canopy_min
237	min_soil_resistance = 50.0_wp, & !< NAMELIST r_soil_min
238	m_total = 0.0_wp, & !< weighted total water content of the soil (m3/m3)
239	n_vangenuchten = 9999999.9_wp, & !< NAMELIST n_vg
240	pave_depth = 9999999.9_wp, & !< depth of the pavement
241	pave_heat_capacity = 1.94E6_wp, & !< volumetric heat capacity of pavement (e.g. roads)
242	pave_heat_conductivity = 1.00_wp, & !< heat conductivity for pavements (e.g. roads)
243	q_s = 0.0_wp, & !< saturation specific humidity
244	residual_moisture = 9999999.9_wp, & !< NAMELIST m_res
245	rho_cp, & !< rho_surface * cp
246	rho_lv, & !< rho * l_v
247	rd_d_rv, & !< r_d / r_v
248	saturation_moisture = 9999999.9_wp, & !< NAMELIST m_sat
249	skip_time_do_lsm = 0.0_wp, & !< LSM is not called before this time
250	vegetation_coverage = 9999999.9_wp, & !< NAMELIST c_veg
251	wilting_point = 9999999.9_wp, & !< NAMELIST m_wilt
252	z0_eb = 9999999.9_wp, & !< NAMELIST z0 (lsm_par)
253	z0h_eb = 9999999.9_wp, & !< NAMELIST z0h (lsm_par)
254	z0q_eb = 9999999.9_wp !< NAMELIST z0q (lsm_par)
255
256	REAL(wp), DIMENSION(nzb_soil:nzt_soil) :: &
257	ddz_soil_stag, & !< 1/dz_soil_stag
258	dz_soil_stag, & !< soil grid spacing (center-center)
259	root_extr = 0.0_wp, & !< root extraction
260	root_fraction = (/9999999.9_wp, 9999999.9_wp, &
261	9999999.9_wp, 9999999.9_wp /), & !< distribution of root surface area to the individual soil layers
262	zs = (/0.07_wp, 0.28_wp, 1.00_wp, 2.89_wp/), & !< soil layer depths (m)
263	soil_moisture = 0.0_wp !< soil moisture content (m3/m3)
264
265	REAL(wp), DIMENSION(nzb_soil:nzt_soil+1) :: &
266	soil_temperature = (/290.0_wp, 287.0_wp, 285.0_wp, 283.0_wp, & !< soil temperature (K)
267	283.0_wp /), &
268	ddz_soil, & !< 1/dz_soil
269	dz_soil !< soil grid spacing (edge-edge)
270
271	#if defined( __nopointer )
272	REAL(wp), DIMENSION(:,:), ALLOCATABLE, TARGET :: t_surface, & !< surface temperature (K)
273	t_surface_p, & !< progn. surface temperature (K)
274	m_liq_eb, & !< liquid water reservoir (m)
275	m_liq_eb_av, & !< liquid water reservoir (m)
276	m_liq_eb_p !< progn. liquid water reservoir (m)
277	#else
278	REAL(wp), DIMENSION(:,:), POINTER :: t_surface, &
279	t_surface_p, &
280	m_liq_eb, &
281	m_liq_eb_p
282
283	REAL(wp), DIMENSION(:,:), ALLOCATABLE, TARGET :: t_surface_1, t_surface_2, &
284	m_liq_eb_av, &
285	m_liq_eb_1, m_liq_eb_2
286	#endif
287
288	!
289	!-- Temporal tendencies for time stepping
290	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: tt_surface_m, & !< surface temperature tendency (K)
291	tm_liq_eb_m !< liquid water reservoir tendency (m)
292
293	!
294	!-- Energy balance variables
295	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: &
296	alpha_vg, & !< coef. of Van Genuchten
297	c_liq, & !< liquid water coverage (of vegetated area)
298	c_liq_av, & !< average of c_liq
299	c_soil_av, & !< average of c_soil
300	c_veg, & !< vegetation coverage
301	c_veg_av, & !< average of c_veg
302	f_sw_in, & !< fraction of absorbed shortwave radiation by the surface layer (not implemented yet)
303	ghf_eb, & !< ground heat flux
304	ghf_eb_av, & !< average of ghf_eb
305	gamma_w_sat, & !< hydraulic conductivity at saturation
306	g_d, & !< coefficient for dependence of r_canopy on water vapour pressure deficit
307	lai, & !< leaf area index
308	lai_av, & !< average of lai
309	lambda_surface_s, & !< coupling between surface and soil (depends on vegetation type)
310	lambda_surface_u, & !< coupling between surface and soil (depends on vegetation type)
311	l_vg, & !< coef. of Van Genuchten
312	m_fc, & !< soil moisture at field capacity (m3/m3)
313	m_res, & !< residual soil moisture
314	m_sat, & !< saturation soil moisture (m3/m3)
315	m_wilt, & !< soil moisture at permanent wilting point (m3/m3)
316	n_vg, & !< coef. Van Genuchten
317	qsws_eb, & !< surface flux of latent heat (total)
318	qsws_eb_av, & !< average of qsws_eb
319	qsws_liq_eb, & !< surface flux of latent heat (liquid water portion)
320	qsws_liq_eb_av, & !< average of qsws_liq_eb
321	qsws_soil_eb, & !< surface flux of latent heat (soil portion)
322	qsws_soil_eb_av, & !< average of qsws_soil_eb
323	qsws_veg_eb, & !< surface flux of latent heat (vegetation portion)
324	qsws_veg_eb_av, & !< average of qsws_veg_eb
325	rad_net_l, & !< local copy of rad_net (net radiation at surface)
326	r_a, & !< aerodynamic resistance
327	r_a_av, & !< average of r_a
328	r_canopy, & !< canopy resistance
329	r_soil, & !< soil resistance
330	r_soil_min, & !< minimum soil resistance
331	r_s, & !< total surface resistance (combination of r_soil and r_canopy)
332	r_s_av, & !< average of r_s
333	r_canopy_min, & !< minimum canopy (stomatal) resistance
334	shf_eb, & !< surface flux of sensible heat
335	shf_eb_av !< average of shf_eb
336
337
338	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: &
339	lambda_h, & !< heat conductivity of soil (W/m/K)
340	lambda_w, & !< hydraulic diffusivity of soil (?)
341	gamma_w, & !< hydraulic conductivity of soil (W/m/K)
342	rho_c_total !< volumetric heat capacity of the actual soil matrix (?)
343
344	#if defined( __nopointer )
345	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE, TARGET :: &
346	t_soil, & !< Soil temperature (K)
347	t_soil_av, & !< Average of t_soil
348	t_soil_p, & !< Prog. soil temperature (K)
349	m_soil, & !< Soil moisture (m3/m3)
350	m_soil_av, & !< Average of m_soil
351	m_soil_p !< Prog. soil moisture (m3/m3)
352	#else
353	REAL(wp), DIMENSION(:,:,:), POINTER :: &
354	t_soil, t_soil_p, &
355	m_soil, m_soil_p
356
357	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE, TARGET :: &
358	t_soil_av, t_soil_1, t_soil_2, &
359	m_soil_av, m_soil_1, m_soil_2
360	#endif
361
362
363	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: &
364	tt_soil_m, & !< t_soil storage array
365	tm_soil_m, & !< m_soil storage array
366	root_fr !< root fraction (sum=1)
367
368
369	!
370	!-- Predefined Land surface classes (veg_type)
371	CHARACTER(26), DIMENSION(0:20), PARAMETER :: veg_type_name = (/ &
372	'user defined ', & ! 0
373	'crops, mixed farming ', & ! 1
374	'short grass ', & ! 2
375	'evergreen needleleaf trees', & ! 3
376	'deciduous needleleaf trees', & ! 4
377	'evergreen broadleaf trees ', & ! 5
378	'deciduous broadleaf trees ', & ! 6
379	'tall grass ', & ! 7
380	'desert ', & ! 8
381	'tundra ', & ! 9
382	'irrigated crops ', & ! 10
383	'semidesert ', & ! 11
384	'ice caps and glaciers ', & ! 12
385	'bogs and marshes ', & ! 13
386	'inland water ', & ! 14
387	'ocean ', & ! 15
388	'evergreen shrubs ', & ! 16
389	'deciduous shrubs ', & ! 17
390	'mixed forest/woodland ', & ! 18
391	'interrupted forest ', & ! 19
392	'pavements/roads ' & ! 20
393	/)
394
395	!
396	!-- Soil model classes (soil_type)
397	CHARACTER(12), DIMENSION(0:7), PARAMETER :: soil_type_name = (/ &
398	'user defined', & ! 0
399	'coarse ', & ! 1
400	'medium ', & ! 2
401	'medium-fine ', & ! 3
402	'fine ', & ! 4
403	'very fine ', & ! 5
404	'organic ', & ! 6
405	'loamy (CH) ' & ! 7
406	/)
407	!
408	!-- Land surface parameters according to the respective classes (veg_type)
409
410	!
411	!-- Land surface parameters I
412	!-- r_canopy_min, lai, c_veg, g_d
413	REAL(wp), DIMENSION(0:3,1:20), PARAMETER :: veg_pars = RESHAPE( (/ &
414	180.0_wp, 3.00_wp, 0.90_wp, 0.00_wp, & ! 1
415	110.0_wp, 2.00_wp, 0.85_wp, 0.00_wp, & ! 2
416	500.0_wp, 5.00_wp, 0.90_wp, 0.03_wp, & ! 3
417	500.0_wp, 5.00_wp, 0.90_wp, 0.03_wp, & ! 4
418	175.0_wp, 5.00_wp, 0.90_wp, 0.03_wp, & ! 5
419	240.0_wp, 6.00_wp, 0.99_wp, 0.13_wp, & ! 6
420	100.0_wp, 2.00_wp, 0.70_wp, 0.00_wp, & ! 7
421	250.0_wp, 0.05_wp, 0.00_wp, 0.00_wp, & ! 8
422	80.0_wp, 1.00_wp, 0.50_wp, 0.00_wp, & ! 9
423	180.0_wp, 3.00_wp, 0.90_wp, 0.00_wp, & ! 10
424	150.0_wp, 0.50_wp, 0.10_wp, 0.00_wp, & ! 11
425	0.0_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 12
426	240.0_wp, 4.00_wp, 0.60_wp, 0.00_wp, & ! 13
427	0.0_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 14
428	0.0_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 15
429	225.0_wp, 3.00_wp, 0.50_wp, 0.00_wp, & ! 16
430	225.0_wp, 1.50_wp, 0.50_wp, 0.00_wp, & ! 17
431	250.0_wp, 5.00_wp, 0.90_wp, 0.03_wp, & ! 18
432	175.0_wp, 2.50_wp, 0.90_wp, 0.03_wp, & ! 19
433	0.0_wp, 0.00_wp, 0.00_wp, 0.00_wp & ! 20
434	/), (/ 4, 20 /) )
435
436	!
437	!-- Land surface parameters II z0, z0h, z0q
438	REAL(wp), DIMENSION(0:2,1:20), PARAMETER :: roughness_par = RESHAPE( (/ &
439	0.25_wp, 0.25E-2_wp, 0.25E-2_wp, & ! 1
440	0.20_wp, 0.20E-2_wp, 0.20E-2_wp, & ! 2
441	2.00_wp, 2.00_wp, 2.00_wp, & ! 3
442	2.00_wp, 2.00_wp, 2.00_wp, & ! 4
443	2.00_wp, 2.00_wp, 2.00_wp, & ! 5
444	2.00_wp, 2.00_wp, 2.00_wp, & ! 6
445	0.47_wp, 0.47E-2_wp, 0.47E-2_wp, & ! 7
446	0.013_wp, 0.013E-2_wp, 0.013E-2_wp, & ! 8
447	0.034_wp, 0.034E-2_wp, 0.034E-2_wp, & ! 9
448	0.5_wp, 0.50E-2_wp, 0.50E-2_wp, & ! 10
449	0.17_wp, 0.17E-2_wp, 0.17E-2_wp, & ! 11
450	1.3E-3_wp, 1.3E-4_wp, 1.3E-4_wp, & ! 12
451	0.83_wp, 0.83E-2_wp, 0.83E-2_wp, & ! 13
452	0.00_wp, 0.00_wp, 0.00_wp, & ! 14
453	0.00_wp, 0.00_wp, 0.00_wp, & ! 15
454	0.10_wp, 0.10E-2_wp, 0.10E-2_wp, & ! 16
455	0.25_wp, 0.25E-2_wp, 0.25E-2_wp, & ! 17
456	2.00_wp, 2.00E-2_wp, 2.00E-2_wp, & ! 18
457	1.10_wp, 1.10E-2_wp, 1.10E-2_wp, & ! 19
458	1.0E-4_wp, 1.0E-5_wp, 1.0E-5_wp & ! 20
459	/), (/ 3, 20 /) )
460
461	!
462	!-- Land surface parameters III lambda_surface_s, lambda_surface_u, f_sw_in
463	REAL(wp), DIMENSION(0:2,1:20), PARAMETER :: surface_pars = RESHAPE( (/ &
464	10.0_wp, 10.0_wp, 0.05_wp, & ! 1
465	10.0_wp, 10.0_wp, 0.05_wp, & ! 2
466	20.0_wp, 15.0_wp, 0.03_wp, & ! 3
467	20.0_wp, 15.0_wp, 0.03_wp, & ! 4
468	20.0_wp, 15.0_wp, 0.03_wp, & ! 5
469	20.0_wp, 15.0_wp, 0.03_wp, & ! 6
470	10.0_wp, 10.0_wp, 0.05_wp, & ! 7
471	15.0_wp, 15.0_wp, 0.00_wp, & ! 8
472	10.0_wp, 10.0_wp, 0.05_wp, & ! 9
473	10.0_wp, 10.0_wp, 0.05_wp, & ! 10
474	10.0_wp, 10.0_wp, 0.05_wp, & ! 11
475	58.0_wp, 58.0_wp, 0.00_wp, & ! 12
476	10.0_wp, 10.0_wp, 0.05_wp, & ! 13
477	1.0E10_wp, 1.0E10_wp, 0.00_wp, & ! 14
478	1.0E10_wp, 1.0E10_wp, 0.00_wp, & ! 15
479	10.0_wp, 10.0_wp, 0.05_wp, & ! 16
480	10.0_wp, 10.0_wp, 0.05_wp, & ! 17
481	20.0_wp, 15.0_wp, 0.03_wp, & ! 18
482	20.0_wp, 15.0_wp, 0.03_wp, & ! 19
483	0.0_wp, 0.0_wp, 0.00_wp & ! 20
484	/), (/ 3, 20 /) )
485
486	!
487	!-- Root distribution (sum = 1) level 1, level 2, level 3, level 4,
488	REAL(wp), DIMENSION(0:3,1:20), PARAMETER :: root_distribution = RESHAPE( (/ &
489	0.24_wp, 0.41_wp, 0.31_wp, 0.04_wp, & ! 1
490	0.35_wp, 0.38_wp, 0.23_wp, 0.04_wp, & ! 2
491	0.26_wp, 0.39_wp, 0.29_wp, 0.06_wp, & ! 3
492	0.26_wp, 0.38_wp, 0.29_wp, 0.07_wp, & ! 4
493	0.24_wp, 0.38_wp, 0.31_wp, 0.07_wp, & ! 5
494	0.25_wp, 0.34_wp, 0.27_wp, 0.14_wp, & ! 6
495	0.27_wp, 0.27_wp, 0.27_wp, 0.09_wp, & ! 7
496	1.00_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 8
497	0.47_wp, 0.45_wp, 0.08_wp, 0.00_wp, & ! 9
498	0.24_wp, 0.41_wp, 0.31_wp, 0.04_wp, & ! 10
499	0.17_wp, 0.31_wp, 0.33_wp, 0.19_wp, & ! 11
500	0.00_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 12
501	0.25_wp, 0.34_wp, 0.27_wp, 0.11_wp, & ! 13
502	0.00_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 14
503	0.00_wp, 0.00_wp, 0.00_wp, 0.00_wp, & ! 15
504	0.23_wp, 0.36_wp, 0.30_wp, 0.11_wp, & ! 16
505	0.23_wp, 0.36_wp, 0.30_wp, 0.11_wp, & ! 17
506	0.19_wp, 0.35_wp, 0.36_wp, 0.10_wp, & ! 18
507	0.19_wp, 0.35_wp, 0.36_wp, 0.10_wp, & ! 19
508	0.00_wp, 0.00_wp, 0.00_wp, 0.00_wp & ! 20
509	/), (/ 4, 20 /) )
510
511	!
512	!-- Soil parameters according to the following porosity classes (soil_type)
513
514	!
515	!-- Soil parameters I alpha_vg, l_vg, n_vg, gamma_w_sat
516	REAL(wp), DIMENSION(0:3,1:7), PARAMETER :: soil_pars = RESHAPE( (/ &
517	3.83_wp, 1.250_wp, 1.38_wp, 6.94E-6_wp, & ! 1
518	3.14_wp, -2.342_wp, 1.28_wp, 1.16E-6_wp, & ! 2
519	0.83_wp, -0.588_wp, 1.25_wp, 0.26E-6_wp, & ! 3
520	3.67_wp, -1.977_wp, 1.10_wp, 2.87E-6_wp, & ! 4
521	2.65_wp, 2.500_wp, 1.10_wp, 1.74E-6_wp, & ! 5
522	1.30_wp, 0.400_wp, 1.20_wp, 0.93E-6_wp, & ! 6
523	0.00_wp, 0.00_wp, 0.00_wp, 0.57E-6_wp & ! 7
524	/), (/ 4, 7 /) )
525
526	!
527	!-- Soil parameters II m_sat, m_fc, m_wilt, m_res
528	REAL(wp), DIMENSION(0:3,1:7), PARAMETER :: m_soil_pars = RESHAPE( (/ &
529	0.403_wp, 0.244_wp, 0.059_wp, 0.025_wp, & ! 1
530	0.439_wp, 0.347_wp, 0.151_wp, 0.010_wp, & ! 2
531	0.430_wp, 0.383_wp, 0.133_wp, 0.010_wp, & ! 3
532	0.520_wp, 0.448_wp, 0.279_wp, 0.010_wp, & ! 4
533	0.614_wp, 0.541_wp, 0.335_wp, 0.010_wp, & ! 5
534	0.766_wp, 0.663_wp, 0.267_wp, 0.010_wp, & ! 6
535	0.472_wp, 0.323_wp, 0.171_wp, 0.000_wp & ! 7
536	/), (/ 4, 7 /) )
537
538
539	SAVE
540
541
542	PRIVATE
543
544
545	!
546	!-- Public functions
547	PUBLIC lsm_check_data_output, lsm_check_data_output_pr, &
548	lsm_check_parameters, lsm_energy_balance, lsm_header, lsm_init, &
549	lsm_init_arrays, lsm_parin, lsm_soil_model, lsm_swap_timelevel
550	!
551	!-- Public parameters, constants and initial values
552	PUBLIC land_surface, skip_time_do_lsm
553
554	!
555	!-- Public grid variables
556	PUBLIC nzb_soil, nzs, nzt_soil, zs
557
558	!
559	!-- Public 2D output variables
560	PUBLIC c_liq, c_liq_av, c_soil_av, c_veg, c_veg_av, ghf_eb, ghf_eb_av, &
561	lai, lai_av, qsws_eb, qsws_eb_av, qsws_liq_eb, qsws_liq_eb_av, &
562	qsws_soil_eb, qsws_soil_eb_av, qsws_veg_eb, qsws_veg_eb_av, &
563	r_a, r_a_av, r_s, r_s_av, shf_eb, shf_eb_av
564
565	!
566	!-- Public prognostic variables
567	PUBLIC m_liq_eb, m_liq_eb_av, m_soil, m_soil_av, t_soil, t_soil_av
568
569
570	INTERFACE lsm_check_data_output
571	MODULE PROCEDURE lsm_check_data_output
572	END INTERFACE lsm_check_data_output
573
574	INTERFACE lsm_check_data_output_pr
575	MODULE PROCEDURE lsm_check_data_output_pr
576	END INTERFACE lsm_check_data_output_pr
577
578	INTERFACE lsm_check_parameters
579	MODULE PROCEDURE lsm_check_parameters
580	END INTERFACE lsm_check_parameters
581
582	INTERFACE lsm_energy_balance
583	MODULE PROCEDURE lsm_energy_balance
584	END INTERFACE lsm_energy_balance
585
586	INTERFACE lsm_header
587	MODULE PROCEDURE lsm_header
588	END INTERFACE lsm_header
589
590	INTERFACE lsm_init
591	MODULE PROCEDURE lsm_init
592	END INTERFACE lsm_init
593
594	INTERFACE lsm_init_arrays
595	MODULE PROCEDURE lsm_init_arrays
596	END INTERFACE lsm_init_arrays
597
598	INTERFACE lsm_parin
599	MODULE PROCEDURE lsm_parin
600	END INTERFACE lsm_parin
601
602	INTERFACE lsm_soil_model
603	MODULE PROCEDURE lsm_soil_model
604	END INTERFACE lsm_soil_model
605
606	INTERFACE lsm_swap_timelevel
607	MODULE PROCEDURE lsm_swap_timelevel
608	END INTERFACE lsm_swap_timelevel
609
610	CONTAINS
611
612	!------------------------------------------------------------------------------!
613	! Description:
614	! ------------
615	!> Check data output for land surface model
616	!------------------------------------------------------------------------------!
617	SUBROUTINE lsm_check_data_output( var, unit, i, ilen, k )
618
619
620	USE control_parameters, &
621	ONLY: data_output, message_string
622
623	IMPLICIT NONE
624
625	CHARACTER (LEN=*) :: unit !<
626	CHARACTER (LEN=*) :: var !<
627
628	INTEGER(iwp) :: i
629	INTEGER(iwp) :: ilen
630	INTEGER(iwp) :: k
631
632	SELECT CASE ( TRIM( var ) )
633
634	CASE ( 'm_soil' )
635	IF ( .NOT. land_surface ) THEN
636	message_string = 'output of "' // TRIM( var ) // '" requi' // &
637	'res land_surface = .TRUE.'
638	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
639	ENDIF
640	unit = 'm3/m3'
641
642	CASE ( 't_soil' )
643	IF ( .NOT. land_surface ) THEN
644	message_string = 'output of "' // TRIM( var ) // '" requi' // &
645	'res land_surface = .TRUE.'
646	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
647	ENDIF
648	unit = 'K'
649
650	CASE ( 'lai', 'c_liq', 'c_soil', 'c_veg', 'ghf_eb', 'm_liq_eb',&
651	'qsws_eb', 'qsws_liq_eb', 'qsws_soil_eb', 'qsws_veg_eb', &
652	'r_a', 'r_s', 'shf_eb*' )
653	IF ( k == 0 .OR. data_output(i)(ilen-2:ilen) /= '_xy' ) THEN
654	message_string = 'illegal value for data_output: "' // &
655	TRIM( var ) // '" & only 2d-horizontal ' // &
656	'cross sections are allowed for this value'
657	CALL message( 'check_parameters', 'PA0111', 1, 2, 0, 6, 0 )
658	ENDIF
659	IF ( TRIM( var ) == 'lai*' .AND. .NOT. land_surface ) THEN
660	message_string = 'output of "' // TRIM( var ) // '" requi' // &
661	'res land_surface = .TRUE.'
662	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
663	ENDIF
664	IF ( TRIM( var ) == 'c_liq*' .AND. .NOT. land_surface ) THEN
665	message_string = 'output of "' // TRIM( var ) // '" requi' // &
666	'res land_surface = .TRUE.'
667	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
668	ENDIF
669	IF ( TRIM( var ) == 'c_soil*' .AND. .NOT. land_surface ) THEN
670	message_string = 'output of "' // TRIM( var ) // '" requi' // &
671	'res land_surface = .TRUE.'
672	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
673	ENDIF
674	IF ( TRIM( var ) == 'c_veg*' .AND. .NOT. land_surface ) THEN
675	message_string = 'output of "' // TRIM( var ) // '" requi' // &
676	'res land_surface = .TRUE.'
677	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
678	ENDIF
679	IF ( TRIM( var ) == 'ghf_eb*' .AND. .NOT. land_surface ) THEN
680	message_string = 'output of "' // TRIM( var ) // '" requi' // &
681	'res land_surface = .TRUE.'
682	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
683	ENDIF
684	IF ( TRIM( var ) == 'm_liq_eb*' .AND. .NOT. land_surface ) THEN
685	message_string = 'output of "' // TRIM( var ) // '" requi' // &
686	'res land_surface = .TRUE.'
687	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
688	ENDIF
689	IF ( TRIM( var ) == 'qsws_eb*' .AND. .NOT. land_surface ) THEN
690	message_string = 'output of "' // TRIM( var ) // '" requi' // &
691	'res land_surface = .TRUE.'
692	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
693	ENDIF
694	IF ( TRIM( var ) == 'qsws_liq_eb*' .AND. .NOT. land_surface ) &
695	THEN
696	message_string = 'output of "' // TRIM( var ) // '" requi' // &
697	'res land_surface = .TRUE.'
698	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
699	ENDIF
700	IF ( TRIM( var ) == 'qsws_soil_eb*' .AND. .NOT. land_surface ) &
701	THEN
702	message_string = 'output of "' // TRIM( var ) // '" requi' // &
703	'res land_surface = .TRUE.'
704	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
705	ENDIF
706	IF ( TRIM( var ) == 'qsws_veg_eb*' .AND. .NOT. land_surface ) &
707	THEN
708	message_string = 'output of "' // TRIM( var ) // '" requi' // &
709	'res land_surface = .TRUE.'
710	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
711	ENDIF
712	IF ( TRIM( var ) == 'r_a*' .AND. .NOT. land_surface ) &
713	THEN
714	message_string = 'output of "' // TRIM( var ) // '" requi' // &
715	'res land_surface = .TRUE.'
716	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
717	ENDIF
718	IF ( TRIM( var ) == 'r_s*' .AND. .NOT. land_surface ) &
719	THEN
720	message_string = 'output of "' // TRIM( var ) // '" requi' // &
721	'res land_surface = .TRUE.'
722	CALL message( 'check_parameters', 'PA0404', 1, 2, 0, 6, 0 )
723	ENDIF
724
725	IF ( TRIM( var ) == 'lai*' ) unit = 'none'
726	IF ( TRIM( var ) == 'c_liq*' ) unit = 'none'
727	IF ( TRIM( var ) == 'c_soil*') unit = 'none'
728	IF ( TRIM( var ) == 'c_veg*' ) unit = 'none'
729	IF ( TRIM( var ) == 'ghf_eb*') unit = 'W/m2'
730	IF ( TRIM( var ) == 'm_liq_eb*' ) unit = 'm'
731	IF ( TRIM( var ) == 'qsws_eb*' ) unit = 'W/m2'
732	IF ( TRIM( var ) == 'qsws_liq_eb*' ) unit = 'W/m2'
733	IF ( TRIM( var ) == 'qsws_soil_eb*' ) unit = 'W/m2'
734	IF ( TRIM( var ) == 'qsws_veg_eb*' ) unit = 'W/m2'
735	IF ( TRIM( var ) == 'r_a*') unit = 's/m'
736	IF ( TRIM( var ) == 'r_s*') unit = 's/m'
737	IF ( TRIM( var ) == 'shf_eb*') unit = 'W/m2'
738
739	CASE DEFAULT
740	unit = 'illegal'
741
742	END SELECT
743
744
745	END SUBROUTINE lsm_check_data_output
746
747	SUBROUTINE lsm_check_data_output_pr( variable, var_count, unit, dopr_unit )
748
749	USE control_parameters, &
750	ONLY: data_output_pr, message_string
751
752	USE indices
753
754	USE profil_parameter
755
756	USE statistics
757
758	IMPLICIT NONE
759
760	CHARACTER (LEN=*) :: unit !<
761	CHARACTER (LEN=*) :: variable !<
762	CHARACTER (LEN=*) :: dopr_unit !< local value of dopr_unit
763
764	INTEGER(iwp) :: user_pr_index !<
765	INTEGER(iwp) :: var_count !<
766
767	SELECT CASE ( TRIM( variable ) )
768
769	CASE ( 't_soil', '#t_soil' )
770	IF ( .NOT. land_surface ) THEN
771	message_string = 'data_output_pr = ' // &
772	TRIM( data_output_pr(var_count) ) // ' is' // &
773	'not implemented for land_surface = .FALSE.'
774	CALL message( 'check_parameters', 'PA0402', 1, 2, 0, 6, 0 )
775	ELSE
776	dopr_index(var_count) = 89
777	dopr_unit = 'K'
778	hom(0:nzs-1,2,89,:) = SPREAD( - zs, 2, statistic_regions+1 )
779	IF ( data_output_pr(var_count)(1:1) == '#' ) THEN
780	dopr_initial_index(var_count) = 90
781	hom(0:nzs-1,2,90,:) = SPREAD( - zs, 2, statistic_regions+1 )
782	data_output_pr(var_count) = data_output_pr(var_count)(2:)
783	ENDIF
784	unit = dopr_unit
785	ENDIF
786
787	CASE ( 'm_soil', '#m_soil' )
788	IF ( .NOT. land_surface ) THEN
789	message_string = 'data_output_pr = ' // &
790	TRIM( data_output_pr(var_count) ) // ' is' // &
791	' not implemented for land_surface = .FALSE.'
792	CALL message( 'check_parameters', 'PA0402', 1, 2, 0, 6, 0 )
793	ELSE
794	dopr_index(var_count) = 91
795	dopr_unit = 'm3/m3'
796	hom(0:nzs-1,2,91,:) = SPREAD( - zs, 2, statistic_regions+1 )
797	IF ( data_output_pr(var_count)(1:1) == '#' ) THEN
798	dopr_initial_index(var_count) = 92
799	hom(0:nzs-1,2,92,:) = SPREAD( - zs, 2, statistic_regions+1 )
800	data_output_pr(var_count) = data_output_pr(var_count)(2:)
801	ENDIF
802	unit = dopr_unit
803	ENDIF
804
805
806	CASE DEFAULT
807	unit = 'illegal'
808
809	END SELECT
810
811
812	END SUBROUTINE lsm_check_data_output_pr
813
814
815	!------------------------------------------------------------------------------!
816	! Description:
817	! ------------
818	!> Check parameters routine for land surface model
819	!------------------------------------------------------------------------------!
820	SUBROUTINE lsm_check_parameters
821
822	USE control_parameters, &
823	ONLY: bc_pt_b, bc_q_b, constant_flux_layer, message_string, &
824	most_method, topography
825
826	USE radiation_model_mod, &
827	ONLY: radiation
828
829
830	IMPLICIT NONE
831
832
833	!
834	!-- Dirichlet boundary conditions are required as the surface fluxes are
835	!-- calculated from the temperature/humidity gradients in the land surface
836	!-- model
837	IF ( bc_pt_b == 'neumann' .OR. bc_q_b == 'neumann' ) THEN
838	message_string = 'lsm requires setting of'// &
839	'bc_pt_b = "dirichlet" and '// &
840	'bc_q_b = "dirichlet"'
841	CALL message( 'check_parameters', 'PA0399', 1, 2, 0, 6, 0 )
842	ENDIF
843
844	IF ( .NOT. constant_flux_layer ) THEN
845	message_string = 'lsm requires '// &
846	'constant_flux_layer = .T.'
847	CALL message( 'check_parameters', 'PA0400', 1, 2, 0, 6, 0 )
848	ENDIF
849
850	IF ( topography /= 'flat' ) THEN
851	message_string = 'lsm cannot be used ' // &
852	'in combination with topography /= "flat"'
853	CALL message( 'check_parameters', 'PA0415', 1, 2, 0, 6, 0 )
854	ENDIF
855
856	IF ( ( veg_type == 14 .OR. veg_type == 15 ) .AND. &
857	most_method == 'lookup' ) THEN
858	WRITE( message_string, * ) 'veg_type = ', veg_type, ' is not ', &
859	'allowed in combination with ', &
860	'most_method = ', most_method
861	CALL message( 'check_parameters', 'PA0417', 1, 2, 0, 6, 0 )
862	ENDIF
863
864	IF ( veg_type == 0 ) THEN
865	IF ( SUM( root_fraction ) /= 1.0_wp ) THEN
866	message_string = 'veg_type = 0 (user_defined)'// &
867	'requires setting of root_fraction(0:3)'// &
868	'/= 9999999.9 and SUM(root_fraction) = 1'
869	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
870	ENDIF
871
872	IF ( min_canopy_resistance == 9999999.9_wp ) THEN
873	message_string = 'veg_type = 0 (user defined)'// &
874	'requires setting of min_canopy_resistance'// &
875	'/= 9999999.9'
876	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
877	ENDIF
878
879	IF ( leaf_area_index == 9999999.9_wp ) THEN
880	message_string = 'veg_type = 0 (user_defined)'// &
881	'requires setting of leaf_area_index'// &
882	'/= 9999999.9'
883	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
884	ENDIF
885
886	IF ( vegetation_coverage == 9999999.9_wp ) THEN
887	message_string = 'veg_type = 0 (user_defined)'// &
888	'requires setting of vegetation_coverage'// &
889	'/= 9999999.9'
890	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
891	ENDIF
892
893	IF ( canopy_resistance_coefficient == 9999999.9_wp) THEN
894	message_string = 'veg_type = 0 (user_defined)'// &
895	'requires setting of'// &
896	'canopy_resistance_coefficient /= 9999999.9'
897	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
898	ENDIF
899
900	IF ( lambda_surface_stable == 9999999.9_wp ) THEN
901	message_string = 'veg_type = 0 (user_defined)'// &
902	'requires setting of lambda_surface_stable'// &
903	'/= 9999999.9'
904	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
905	ENDIF
906
907	IF ( lambda_surface_unstable == 9999999.9_wp ) THEN
908	message_string = 'veg_type = 0 (user_defined)'// &
909	'requires setting of lambda_surface_unstable'// &
910	'/= 9999999.9'
911	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
912	ENDIF
913
914	IF ( f_shortwave_incoming == 9999999.9_wp ) THEN
915	message_string = 'veg_type = 0 (user_defined)'// &
916	'requires setting of f_shortwave_incoming'// &
917	'/= 9999999.9'
918	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
919	ENDIF
920
921	IF ( z0_eb == 9999999.9_wp ) THEN
922	message_string = 'veg_type = 0 (user_defined)'// &
923	'requires setting of z0_eb'// &
924	'/= 9999999.9'
925	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
926	ENDIF
927
928	IF ( z0h_eb == 9999999.9_wp ) THEN
929	message_string = 'veg_type = 0 (user_defined)'// &
930	'requires setting of z0h_eb'// &
931	'/= 9999999.9'
932	CALL message( 'check_parameters', 'PA0401', 1, 2, 0, 6, 0 )
933	ENDIF
934
935
936	ENDIF
937
938	IF ( soil_type == 0 ) THEN
939
940	IF ( alpha_vangenuchten == 9999999.9_wp ) THEN
941	message_string = 'soil_type = 0 (user_defined)'// &
942	'requires setting of alpha_vangenuchten'// &
943	'/= 9999999.9'
944	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
945	ENDIF
946
947	IF ( l_vangenuchten == 9999999.9_wp ) THEN
948	message_string = 'soil_type = 0 (user_defined)'// &
949	'requires setting of l_vangenuchten'// &
950	'/= 9999999.9'
951	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
952	ENDIF
953
954	IF ( n_vangenuchten == 9999999.9_wp ) THEN
955	message_string = 'soil_type = 0 (user_defined)'// &
956	'requires setting of n_vangenuchten'// &
957	'/= 9999999.9'
958	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
959	ENDIF
960
961	IF ( hydraulic_conductivity == 9999999.9_wp ) THEN
962	message_string = 'soil_type = 0 (user_defined)'// &
963	'requires setting of hydraulic_conductivity'// &
964	'/= 9999999.9'
965	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
966	ENDIF
967
968	IF ( saturation_moisture == 9999999.9_wp ) THEN
969	message_string = 'soil_type = 0 (user_defined)'// &
970	'requires setting of saturation_moisture'// &
971	'/= 9999999.9'
972	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
973	ENDIF
974
975	IF ( field_capacity == 9999999.9_wp ) THEN
976	message_string = 'soil_type = 0 (user_defined)'// &
977	'requires setting of field_capacity'// &
978	'/= 9999999.9'
979	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
980	ENDIF
981
982	IF ( wilting_point == 9999999.9_wp ) THEN
983	message_string = 'soil_type = 0 (user_defined)'// &
984	'requires setting of wilting_point'// &
985	'/= 9999999.9'
986	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
987	ENDIF
988
989	IF ( residual_moisture == 9999999.9_wp ) THEN
990	message_string = 'soil_type = 0 (user_defined)'// &
991	'requires setting of residual_moisture'// &
992	'/= 9999999.9'
993	CALL message( 'check_parameters', 'PA0403', 1, 2, 0, 6, 0 )
994	ENDIF
995
996	ENDIF
997
998	IF ( .NOT. radiation ) THEN
999	message_string = 'lsm requires '// &
1000	'radiation = .T.'
1001	CALL message( 'check_parameters', 'PA0400', 1, 2, 0, 6, 0 )
1002	ENDIF
1003
1004
1005	END SUBROUTINE lsm_check_parameters
1006
1007	!------------------------------------------------------------------------------!
1008	! Description:
1009	! ------------
1010	!> Solver for the energy balance at the surface.
1011	!------------------------------------------------------------------------------!
1012	SUBROUTINE lsm_energy_balance
1013
1014
1015	IMPLICIT NONE
1016
1017	INTEGER(iwp) :: i !< running index
1018	INTEGER(iwp) :: j !< running index
1019	INTEGER(iwp) :: k, ks !< running index
1020
1021	REAL(wp) :: c_surface_tmp,& !< temporary variable for storing the volumetric heat capacity of the surface
1022	f1, & !< resistance correction term 1
1023	f2, & !< resistance correction term 2
1024	f3, & !< resistance correction term 3
1025	m_min, & !< minimum soil moisture
1026	e, & !< water vapour pressure
1027	e_s, & !< water vapour saturation pressure
1028	e_s_dt, & !< derivate of e_s with respect to T
1029	tend, & !< tendency
1030	dq_s_dt, & !< derivate of q_s with respect to T
1031	coef_1, & !< coef. for prognostic equation
1032	coef_2, & !< coef. for prognostic equation
1033	f_qsws, & !< factor for qsws_eb
1034	f_qsws_veg, & !< factor for qsws_veg_eb
1035	f_qsws_soil, & !< factor for qsws_soil_eb
1036	f_qsws_liq, & !< factor for qsws_liq_eb
1037	f_shf, & !< factor for shf_eb
1038	lambda_surface, & !< Current value of lambda_surface
1039	m_liq_eb_max, & !< maxmimum value of the liq. water reservoir
1040	pt1, & !< potential temperature at first grid level
1041	qv1 !< specific humidity at first grid level
1042
1043	!
1044	!-- Calculate the exner function for the current time step
1045	exn = ( surface_pressure / 1000.0_wp )**0.286_wp
1046
1047	DO i = nxlg, nxrg
1048	DO j = nysg, nyng
1049	k = nzb_s_inner(j,i)
1050
1051	!
1052	!-- Set lambda_surface according to stratification between skin layer and soil
1053	IF ( .NOT. pave_surface(j,i) ) THEN
1054
1055	c_surface_tmp = c_surface
1056
1057	IF ( t_surface(j,i) >= t_soil(nzb_soil,j,i)) THEN
1058	lambda_surface = lambda_surface_s(j,i)
1059	ELSE
1060	lambda_surface = lambda_surface_u(j,i)
1061	ENDIF
1062	ELSE
1063
1064	c_surface_tmp = pave_heat_capacity * dz_soil(nzb_soil) * 0.5_wp
1065	lambda_surface = pave_heat_conductivity * ddz_soil(nzb_soil)
1066
1067	ENDIF
1068
1069	!
1070	!-- First step: calculate aerodyamic resistance. As pt, us, ts
1071	!-- are not available for the prognostic time step, data from the last
1072	!-- time step is used here. Note that this formulation is the
1073	!-- equivalent to the ECMWF formulation using drag coefficients
1074	IF ( cloud_physics ) THEN
1075	pt1 = pt(k+1,j,i) + l_d_cp * pt_d_t(k+1) * ql(k+1,j,i)
1076	qv1 = q(k+1,j,i) - ql(k+1,j,i)
1077	ELSE
1078	pt1 = pt(k+1,j,i)
1079	qv1 = q(k+1,j,i)
1080	ENDIF
1081
1082	r_a(j,i) = (pt1 - pt(k,j,i)) / (ts(j,i) * us(j,i) + 1.0E-20_wp)
1083
1084	!
1085	!-- Make sure that the resistance does not drop to zero for neutral
1086	!-- stratification
1087	IF ( ABS(r_a(j,i)) < 1.0_wp ) r_a(j,i) = 1.0_wp
1088
1089	!
1090	!-- Second step: calculate canopy resistance r_canopy
1091	!-- f1-f3 here are defined as 1/f1-f3 as in ECMWF documentation
1092
1093	!-- f1: correction for incoming shortwave radiation (stomata close at
1094	!-- night)
1095	IF ( radiation_scheme /= 'constant' ) THEN
1096	f1 = MIN( 1.0_wp, ( 0.004_wp * rad_sw_in(k,j,i) + 0.05_wp ) / &
1097	(0.81_wp * (0.004_wp * rad_sw_in(k,j,i) &
1098	+ 1.0_wp)) )
1099	ELSE
1100	f1 = 1.0_wp
1101	ENDIF
1102
1103
1104	!
1105	!-- f2: correction for soil moisture availability to plants (the
1106	!-- integrated soil moisture must thus be considered here)
1107	!-- f2 = 0 for very dry soils
1108	m_total = 0.0_wp
1109	DO ks = nzb_soil, nzt_soil
1110	m_total = m_total + root_fr(ks,j,i) &
1111	* MAX(m_soil(ks,j,i),m_wilt(j,i))
1112	ENDDO
1113
1114	IF ( m_total > m_wilt(j,i) .AND. m_total < m_fc(j,i) ) THEN
1115	f2 = ( m_total - m_wilt(j,i) ) / (m_fc(j,i) - m_wilt(j,i) )
1116	ELSEIF ( m_total >= m_fc(j,i) ) THEN
1117	f2 = 1.0_wp
1118	ELSE
1119	f2 = 1.0E-20_wp
1120	ENDIF
1121
1122	!
1123	!-- Calculate water vapour pressure at saturation
1124	e_s = 0.01_wp * 610.78_wp * EXP( 17.269_wp * ( t_surface(j,i) &
1125	- 273.16_wp ) / ( t_surface(j,i) - 35.86_wp ) )
1126
1127	!
1128	!-- f3: correction for vapour pressure deficit
1129	IF ( g_d(j,i) /= 0.0_wp ) THEN
1130	!
1131	!-- Calculate vapour pressure
1132	e = qv1 * surface_pressure / 0.622_wp
1133	f3 = EXP ( -g_d(j,i) * (e_s - e) )
1134	ELSE
1135	f3 = 1.0_wp
1136	ENDIF
1137
1138	!
1139	!-- Calculate canopy resistance. In case that c_veg is 0 (bare soils),
1140	!-- this calculation is obsolete, as r_canopy is not used below.
1141	!-- To do: check for very dry soil -> r_canopy goes to infinity
1142	r_canopy(j,i) = r_canopy_min(j,i) / (lai(j,i) * f1 * f2 * f3 &
1143	+ 1.0E-20_wp)
1144
1145	!
1146	!-- Third step: calculate bare soil resistance r_soil. The Clapp &
1147	!-- Hornberger parametrization does not consider c_veg.
1148	IF ( soil_type_2d(j,i) /= 7 ) THEN
1149	m_min = c_veg(j,i) * m_wilt(j,i) + (1.0_wp - c_veg(j,i)) * &
1150	m_res(j,i)
1151	ELSE
1152	m_min = m_wilt(j,i)
1153	ENDIF
1154
1155	f2 = ( m_soil(nzb_soil,j,i) - m_min ) / ( m_fc(j,i) - m_min )
1156	f2 = MAX(f2,1.0E-20_wp)
1157	f2 = MIN(f2,1.0_wp)
1158
1159	r_soil(j,i) = r_soil_min(j,i) / f2
1160
1161	!
1162	!-- Calculate the maximum possible liquid water amount on plants and
1163	!-- bare surface. For vegetated surfaces, a maximum depth of 0.2 mm is
1164	!-- assumed, while paved surfaces might hold up 1 mm of water. The
1165	!-- liquid water fraction for paved surfaces is calculated after
1166	!-- Noilhan & Planton (1989), while the ECMWF formulation is used for
1167	!-- vegetated surfaces and bare soils.
1168	IF ( pave_surface(j,i) ) THEN
1169	m_liq_eb_max = m_max_depth * 5.0_wp
1170	c_liq(j,i) = MIN( 1.0_wp, (m_liq_eb(j,i) / m_liq_eb_max)**0.67 )
1171	ELSE
1172	m_liq_eb_max = m_max_depth * ( c_veg(j,i) * lai(j,i) &
1173	+ (1.0_wp - c_veg(j,i)) )
1174	c_liq(j,i) = MIN( 1.0_wp, m_liq_eb(j,i) / m_liq_eb_max )
1175	ENDIF
1176
1177	!
1178	!-- Calculate saturation specific humidity
1179	q_s = 0.622_wp * e_s / surface_pressure
1180
1181	!
1182	!-- In case of dewfall, set evapotranspiration to zero
1183	!-- All super-saturated water is then removed from the air
1184	IF ( humidity .AND. q_s <= qv1 ) THEN
1185	r_canopy(j,i) = 0.0_wp
1186	r_soil(j,i) = 0.0_wp
1187	ENDIF
1188
1189	!
1190	!-- Calculate coefficients for the total evapotranspiration
1191	!-- In case of water surface, set vegetation and soil fluxes to zero.
1192	!-- For pavements, only evaporation of liquid water is possible.
1193	IF ( water_surface(j,i) ) THEN
1194	f_qsws_veg = 0.0_wp
1195	f_qsws_soil = 0.0_wp
1196	f_qsws_liq = rho_lv / r_a(j,i)
1197	ELSEIF ( pave_surface (j,i) ) THEN
1198	f_qsws_veg = 0.0_wp
1199	f_qsws_soil = 0.0_wp
1200	f_qsws_liq = rho_lv * c_liq(j,i) / r_a(j,i)
1201	ELSE
1202	f_qsws_veg = rho_lv * c_veg(j,i) * (1.0_wp - c_liq(j,i))/ &
1203	(r_a(j,i) + r_canopy(j,i))
1204	f_qsws_soil = rho_lv * (1.0_wp - c_veg(j,i)) / (r_a(j,i) + &
1205	r_soil(j,i))
1206	f_qsws_liq = rho_lv * c_veg(j,i) * c_liq(j,i) / r_a(j,i)
1207	ENDIF
1208	!
1209	!-- If soil moisture is below wilting point, plants do no longer
1210	!-- transpirate.
1211	! IF ( m_soil(k,j,i) < m_wilt(j,i) ) THEN
1212	! f_qsws_veg = 0.0_wp
1213	! ENDIF
1214
1215	f_shf = rho_cp / r_a(j,i)
1216	f_qsws = f_qsws_veg + f_qsws_soil + f_qsws_liq
1217
1218	!
1219	!-- Calculate derivative of q_s for Taylor series expansion
1220	e_s_dt = e_s * ( 17.269_wp / (t_surface(j,i) - 35.86_wp) - &
1221	17.269_wp*(t_surface(j,i) - 273.16_wp) &
1222	/ (t_surface(j,i) - 35.86_wp)**2 )
1223
1224	dq_s_dt = 0.622_wp * e_s_dt / surface_pressure
1225
1226	!
1227	!-- Add LW up so that it can be removed in prognostic equation
1228	rad_net_l(j,i) = rad_net(j,i) + rad_lw_out(nzb,j,i)
1229
1230	!
1231	!-- Calculate new skin temperature
1232	IF ( humidity ) THEN
1233	#if defined ( __rrtmg )
1234	!
1235	!-- Numerator of the prognostic equation
1236	coef_1 = rad_net_l(j,i) + rad_lw_out_change_0(j,i) &
1237	* t_surface(j,i) - rad_lw_out(nzb,j,i) &
1238	+ f_shf * pt1 + f_qsws * ( qv1 - q_s &
1239	+ dq_s_dt * t_surface(j,i) ) + lambda_surface &
1240	* t_soil(nzb_soil,j,i)
1241
1242	!
1243	!-- Denominator of the prognostic equation
1244	coef_2 = rad_lw_out_change_0(j,i) + f_qsws * dq_s_dt &
1245	+ lambda_surface + f_shf / exn
1246	#else
1247
1248	!
1249	!-- Numerator of the prognostic equation
1250	coef_1 = rad_net_l(j,i) + 3.0_wp * sigma_sb &
1251	* t_surface(j,i) ** 4 &
1252	+ f_shf * pt1 + f_qsws * ( qv1 &
1253	- q_s + dq_s_dt * t_surface(j,i) ) &
1254	+ lambda_surface * t_soil(nzb_soil,j,i)
1255
1256	!
1257	!-- Denominator of the prognostic equation
1258	coef_2 = 4.0_wp * sigma_sb * t_surface(j,i) ** 3 + f_qsws &
1259	* dq_s_dt + lambda_surface + f_shf / exn
1260
1261	#endif
1262	ELSE
1263
1264	#if defined ( __rrtmg )
1265	!
1266	!-- Numerator of the prognostic equation
1267	coef_1 = rad_net_l(j,i) + rad_lw_out_change_0(j,i) &
1268	* t_surface(j,i) - rad_lw_out(nzb,j,i) &
1269	+ f_shf * pt1 + lambda_surface &
1270	* t_soil(nzb_soil,j,i)
1271
1272	!
1273	!-- Denominator of the prognostic equation
1274	coef_2 = rad_lw_out_change_0(j,i) + lambda_surface + f_shf / exn
1275	#else
1276
1277	!
1278	!-- Numerator of the prognostic equation
1279	coef_1 = rad_net_l(j,i) + 3.0_wp * sigma_sb &
1280	* t_surface(j,i) ** 4 + f_shf * pt1 &
1281	+ lambda_surface * t_soil(nzb_soil,j,i)
1282
1283	!
1284	!-- Denominator of the prognostic equation
1285	coef_2 = 4.0_wp * sigma_sb * t_surface(j,i) ** 3 &
1286	+ lambda_surface + f_shf / exn
1287	#endif
1288	ENDIF
1289
1290	tend = 0.0_wp
1291
1292	!
1293	!-- Implicit solution when the surface layer has no heat capacity,
1294	!-- otherwise use RK3 scheme.
1295	t_surface_p(j,i) = ( coef_1 * dt_3d * tsc(2) + c_surface_tmp * &
1296	t_surface(j,i) ) / ( c_surface_tmp + coef_2 &
1297	* dt_3d * tsc(2) )
1298
1299	!
1300	!-- Add RK3 term
1301	IF ( c_surface_tmp /= 0.0_wp ) THEN
1302
1303	t_surface_p(j,i) = t_surface_p(j,i) + dt_3d * tsc(3) &
1304	* tt_surface_m(j,i)
1305
1306	!
1307	!-- Calculate true tendency
1308	tend = (t_surface_p(j,i) - t_surface(j,i) - dt_3d * tsc(3) &
1309	* tt_surface_m(j,i)) / (dt_3d * tsc(2))
1310	!
1311	!-- Calculate t_surface tendencies for the next Runge-Kutta step
1312	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1313	IF ( intermediate_timestep_count == 1 ) THEN
1314	tt_surface_m(j,i) = tend
1315	ELSEIF ( intermediate_timestep_count < &
1316	intermediate_timestep_count_max ) THEN
1317	tt_surface_m(j,i) = -9.5625_wp * tend + 5.3125_wp &
1318	* tt_surface_m(j,i)
1319	ENDIF
1320	ENDIF
1321	ENDIF
1322
1323	!
1324	!-- In case of fast changes in the skin temperature, it is possible to
1325	!-- update the radiative fluxes independently from the prescribed
1326	!-- radiation call frequency. This effectively prevents oscillations,
1327	!-- especially when setting skip_time_do_radiation /= 0. The threshold
1328	!-- value of 0.2 used here is just a first guess. This method should be
1329	!-- revised in the future as tests have shown that the threshold is
1330	!-- often reached, when no oscillations would occur (causes immense
1331	!-- computing time for the radiation code).
1332	IF ( ABS( t_surface_p(j,i) - t_surface(j,i) ) > 0.2_wp .AND. &
1333	unscheduled_radiation_calls ) THEN
1334	force_radiation_call_l = .TRUE.
1335	ENDIF
1336
1337	pt(k,j,i) = t_surface_p(j,i) / exn
1338
1339	!
1340	!-- Calculate fluxes
1341	#if defined ( __rrtmg )
1342	rad_net_l(j,i) = rad_net_l(j,i) + rad_lw_out_change_0(j,i) &
1343	* t_surface(j,i) - rad_lw_out(nzb,j,i) &
1344	- rad_lw_out_change_0(j,i) * t_surface_p(j,i)
1345
1346	IF ( rrtm_idrv == 1 ) THEN
1347	rad_net(j,i) = rad_net_l(j,i)
1348	rad_lw_out(nzb,j,i) = rad_lw_out(nzb,j,i) &
1349	+ rad_lw_out_change_0(j,i) &
1350	* ( t_surface_p(j,i) - t_surface(j,i) )
1351	ENDIF
1352	#else
1353	rad_net_l(j,i) = rad_net_l(j,i) + 3.0_wp * sigma_sb &
1354	* t_surface(j,i)*4 - 4.0_wp sigma_sb &
1355	* t_surface(j,i)*3 t_surface_p(j,i)
1356	#endif
1357
1358	ghf_eb(j,i) = lambda_surface * (t_surface_p(j,i) &
1359	- t_soil(nzb_soil,j,i))
1360
1361	shf_eb(j,i) = - f_shf * ( pt1 - pt(k,j,i) )
1362
1363	shf(j,i) = shf_eb(j,i) / rho_cp
1364
1365	IF ( humidity ) THEN
1366	qsws_eb(j,i) = - f_qsws * ( qv1 - q_s + dq_s_dt &
1367	* t_surface(j,i) - dq_s_dt * t_surface_p(j,i) )
1368
1369	qsws(j,i) = qsws_eb(j,i) / rho_lv
1370
1371	qsws_veg_eb(j,i) = - f_qsws_veg * ( qv1 - q_s &
1372	+ dq_s_dt * t_surface(j,i) - dq_s_dt &
1373	* t_surface_p(j,i) )
1374
1375	qsws_soil_eb(j,i) = - f_qsws_soil * ( qv1 - q_s &
1376	+ dq_s_dt * t_surface(j,i) - dq_s_dt &
1377	* t_surface_p(j,i) )
1378
1379	qsws_liq_eb(j,i) = - f_qsws_liq * ( qv1 - q_s &
1380	+ dq_s_dt * t_surface(j,i) - dq_s_dt &
1381	* t_surface_p(j,i) )
1382	ENDIF
1383
1384	!
1385	!-- Calculate the true surface resistance
1386	IF ( qsws_eb(j,i) == 0.0_wp ) THEN
1387	r_s(j,i) = 1.0E10_wp
1388	ELSE
1389	r_s(j,i) = - rho_lv * ( qv1 - q_s + dq_s_dt &
1390	* t_surface(j,i) - dq_s_dt * t_surface_p(j,i) ) &
1391	/ qsws_eb(j,i) - r_a(j,i)
1392	ENDIF
1393
1394	!
1395	!-- Calculate change in liquid water reservoir due to dew fall or
1396	!-- evaporation of liquid water
1397	IF ( humidity ) THEN
1398	!
1399	!-- If precipitation is activated, add rain water to qsws_liq_eb
1400	!-- and qsws_soil_eb according the the vegetation coverage.
1401	!-- precipitation_rate is given in mm.
1402	IF ( precipitation ) THEN
1403
1404	!
1405	!-- Add precipitation to liquid water reservoir, if possible.
1406	!-- Otherwise, add the water to soil. In case of
1407	!-- pavements, the exceeding water amount is implicitely removed
1408	!-- as runoff as qsws_soil_eb is then not used in the soil model
1409	IF ( m_liq_eb(j,i) /= m_liq_eb_max ) THEN
1410	qsws_liq_eb(j,i) = qsws_liq_eb(j,i) &
1411	+ c_veg(j,i) * prr(k,j,i) * hyrho(k) &
1412	* 0.001_wp * rho_l * l_v
1413	ELSE
1414	qsws_soil_eb(j,i) = qsws_soil_eb(j,i) &
1415	+ c_veg(j,i) * prr(k,j,i) * hyrho(k) &
1416	* 0.001_wp * rho_l * l_v
1417	ENDIF
1418
1419	!-- Add precipitation to bare soil according to the bare soil
1420	!-- coverage.
1421	qsws_soil_eb(j,i) = qsws_soil_eb(j,i) + (1.0_wp &
1422	- c_veg(j,i)) * prr(k,j,i) * hyrho(k) &
1423	* 0.001_wp * rho_l * l_v
1424	ENDIF
1425
1426	!
1427	!-- If the air is saturated, check the reservoir water level
1428	IF ( qsws_eb(j,i) < 0.0_wp ) THEN
1429
1430	!
1431	!-- Check if reservoir is full (avoid values > m_liq_eb_max)
1432	!-- In that case, qsws_liq_eb goes to qsws_soil_eb. In this
1433	!-- case qsws_veg_eb is zero anyway (because c_liq = 1),
1434	!-- so that tend is zero and no further check is needed
1435	IF ( m_liq_eb(j,i) == m_liq_eb_max ) THEN
1436	qsws_soil_eb(j,i) = qsws_soil_eb(j,i) &
1437	+ qsws_liq_eb(j,i)
1438
1439	qsws_liq_eb(j,i) = 0.0_wp
1440	ENDIF
1441
1442	!
1443	!-- In case qsws_veg_eb becomes negative (unphysical behavior),
1444	!-- let the water enter the liquid water reservoir as dew on the
1445	!-- plant
1446	IF ( qsws_veg_eb(j,i) < 0.0_wp ) THEN
1447	qsws_liq_eb(j,i) = qsws_liq_eb(j,i) + qsws_veg_eb(j,i)
1448	qsws_veg_eb(j,i) = 0.0_wp
1449	ENDIF
1450	ENDIF
1451
1452	tend = - qsws_liq_eb(j,i) * drho_l_lv
1453
1454	m_liq_eb_p(j,i) = m_liq_eb(j,i) + dt_3d * ( tsc(2) * tend &
1455	+ tsc(3) * tm_liq_eb_m(j,i) )
1456
1457	!
1458	!-- Check if reservoir is overfull -> reduce to maximum
1459	!-- (conservation of water is violated here)
1460	m_liq_eb_p(j,i) = MIN(m_liq_eb_p(j,i),m_liq_eb_max)
1461
1462	!
1463	!-- Check if reservoir is empty (avoid values < 0.0)
1464	!-- (conservation of water is violated here)
1465	m_liq_eb_p(j,i) = MAX(m_liq_eb_p(j,i),0.0_wp)
1466
1467
1468	!
1469	!-- Calculate m_liq_eb tendencies for the next Runge-Kutta step
1470	IF ( timestep_scheme(1:5) == 'runge' ) THEN
1471	IF ( intermediate_timestep_count == 1 ) THEN
1472	tm_liq_eb_m(j,i) = tend
1473	ELSEIF ( intermediate_timestep_count < &
1474	intermediate_timestep_count_max ) THEN
1475	tm_liq_eb_m(j,i) = -9.5625_wp * tend + 5.3125_wp &
1476	* tm_liq_eb_m(j,i)
1477	ENDIF
1478	ENDIF
1479
1480	ENDIF
1481
1482	ENDDO
1483	ENDDO
1484
1485	!
1486	!-- Make a logical OR for all processes. Force radiation call if at
1487	!-- least one processor reached the threshold change in skin temperature
1488	IF ( unscheduled_radiation_calls .AND. intermediate_timestep_count &
1489	== intermediate_timestep_count_max-1 ) THEN
1490	#if defined( __parallel )
1491	IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr )
1492	CALL MPI_ALLREDUCE( force_radiation_call_l, force_radiation_call, &
1493	1, MPI_LOGICAL, MPI_LOR, comm2d, ierr )
1494	#else
1495	force_radiation_call = force_radiation_call_l
1496	#endif
1497	force_radiation_call_l = .FALSE.
1498	ENDIF
1499
1500	!
1501	!-- Calculate surface specific humidity
1502	IF ( humidity ) THEN
1503	CALL calc_q_surface
1504	ENDIF
1505
1506	!
1507	!-- Calculate new roughness lengths (for water surfaces only)
1508	CALL calc_z0_water_surface
1509
1510
1511	END SUBROUTINE lsm_energy_balance
1512
1513	!------------------------------------------------------------------------------!
1514	! Description:
1515	! ------------
1516	!> Header output for land surface model
1517	!------------------------------------------------------------------------------!
1518	SUBROUTINE lsm_header ( io )
1519
1520
1521	IMPLICIT NONE
1522
1523	CHARACTER (LEN=86) :: t_soil_chr !< String for soil temperature profile
1524	CHARACTER (LEN=86) :: roots_chr !< String for root profile
1525	CHARACTER (LEN=86) :: vertical_index_chr !< String for the vertical index
1526	CHARACTER (LEN=86) :: m_soil_chr !< String for soil moisture
1527	CHARACTER (LEN=86) :: soil_depth_chr !< String for soil depth
1528	CHARACTER (LEN=10) :: coor_chr !< Temporary string
1529
1530	INTEGER(iwp) :: i !< Loop index over soil layers
1531
1532	INTEGER(iwp), INTENT(IN) :: io !< Unit of the output file
1533
1534	t_soil_chr = ''
1535	m_soil_chr = ''
1536	soil_depth_chr = ''
1537	roots_chr = ''
1538	vertical_index_chr = ''
1539
1540	i = 1
1541	DO i = nzb_soil, nzt_soil
1542	WRITE (coor_chr,'(F10.2,7X)') soil_temperature(i)
1543	t_soil_chr = TRIM( t_soil_chr ) // ' ' // TRIM( coor_chr )
1544
1545	WRITE (coor_chr,'(F10.2,7X)') soil_moisture(i)
1546	m_soil_chr = TRIM( m_soil_chr ) // ' ' // TRIM( coor_chr )
1547
1548	WRITE (coor_chr,'(F10.2,7X)') - zs(i)
1549	soil_depth_chr = TRIM( soil_depth_chr ) // ' ' // TRIM( coor_chr )
1550
1551	WRITE (coor_chr,'(F10.2,7X)') root_fraction(i)
1552	roots_chr = TRIM( roots_chr ) // ' ' // TRIM( coor_chr )
1553
1554	WRITE (coor_chr,'(I10,7X)') i
1555	vertical_index_chr = TRIM( vertical_index_chr ) // ' ' // &
1556	TRIM( coor_chr )
1557	ENDDO
1558
1559	!
1560	!-- Write land surface model header
1561	WRITE( io, 1 )
1562	IF ( conserve_water_content ) THEN
1563	WRITE( io, 2 )
1564	ELSE
1565	WRITE( io, 3 )
1566	ENDIF
1567
1568	WRITE( io, 4 ) TRIM( veg_type_name(veg_type) ), &
1569	TRIM (soil_type_name(soil_type) )
1570	WRITE( io, 5 ) TRIM( soil_depth_chr ), TRIM( t_soil_chr ), &
1571	TRIM( m_soil_chr ), TRIM( roots_chr ), &
1572	TRIM( vertical_index_chr )
1573
1574	1 FORMAT (//' Land surface model information:'/ &
1575	' ------------------------------'/)
1576	2 FORMAT (' --> Soil bottom is closed (water content is conserved', &
1577	', default)')
1578	3 FORMAT (' --> Soil bottom is open (water content is not conserved)')
1579	4 FORMAT (' --> Land surface type : ',A,/ &
1580	' --> Soil porosity type : ',A)
1581	5 FORMAT (/' Initial soil temperature and moisture profile:'// &
1582	' Height: ',A,' m'/ &
1583	' Temperature: ',A,' K'/ &
1584	' Moisture: ',A,' m3/m3'/ &
1585	' Root fraction: ',A,' '/ &
1586	' Grid point: ',A)
1587
1588	END SUBROUTINE lsm_header
1589
1590
1591	!------------------------------------------------------------------------------!
1592	! Description:
1593	! ------------
1594	!> Initialization of the land surface model
1595	!------------------------------------------------------------------------------!
1596	SUBROUTINE lsm_init
1597
1598
1599	IMPLICIT NONE
1600
1601	INTEGER(iwp) :: i !< running index
1602	INTEGER(iwp) :: j !< running index
1603	INTEGER(iwp) :: k !< running index
1604
1605	REAL(wp) :: pt1 !< potential temperature at first grid level
1606
1607
1608	!
1609	!-- Calculate Exner function
1610	exn = ( surface_pressure / 1000.0_wp )**0.286_wp
1611
1612
1613	!
1614	!-- If no cloud physics is used, rho_surface has not been calculated before
1615	IF ( .NOT. cloud_physics ) THEN
1616	rho_surface = surface_pressure * 100.0_wp / ( r_d * pt_surface * exn )
1617	ENDIF
1618
1619	!
1620	!-- Calculate frequently used parameters
1621	rho_cp = cp * rho_surface
1622	rd_d_rv = r_d / r_v
1623	rho_lv = rho_surface * l_v
1624	drho_l_lv = 1.0_wp / (rho_l * l_v)
1625
1626	!
1627	!-- Set inital values for prognostic quantities
1628	tt_surface_m = 0.0_wp
1629	tt_soil_m = 0.0_wp
1630	tm_soil_m = 0.0_wp
1631	tm_liq_eb_m = 0.0_wp
1632	c_liq = 0.0_wp
1633
1634	ghf_eb = 0.0_wp
1635	shf_eb = rho_cp * shf
1636
1637	IF ( humidity ) THEN
1638	qsws_eb = rho_lv * qsws
1639	ELSE
1640	qsws_eb = 0.0_wp
1641	ENDIF
1642
1643	qsws_liq_eb = 0.0_wp
1644	qsws_soil_eb = 0.0_wp
1645	qsws_veg_eb = 0.0_wp
1646
1647	r_a = 50.0_wp
1648	r_s = 50.0_wp
1649	r_canopy = 0.0_wp
1650	r_soil = 0.0_wp
1651
1652	!
1653	!-- Allocate 3D soil model arrays
1654	ALLOCATE ( root_fr(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1655	ALLOCATE ( lambda_h(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1656	ALLOCATE ( rho_c_total(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1657
1658	lambda_h = 0.0_wp
1659	!
1660	!-- If required, allocate humidity-related variables for the soil model
1661	IF ( humidity ) THEN
1662	ALLOCATE ( lambda_w(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1663	ALLOCATE ( gamma_w(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1664
1665	lambda_w = 0.0_wp
1666	ENDIF
1667
1668	!
1669	!-- Calculate grid spacings. Temperature and moisture are defined at
1670	!-- the edges of the soil layers (_stag), whereas gradients/fluxes are defined
1671	!-- at the centers
1672	dz_soil(nzb_soil) = zs(nzb_soil)
1673
1674	DO k = nzb_soil+1, nzt_soil
1675	dz_soil(k) = zs(k) - zs(k-1)
1676	ENDDO
1677	dz_soil(nzt_soil+1) = dz_soil(nzt_soil)
1678
1679	DO k = nzb_soil, nzt_soil-1
1680	dz_soil_stag(k) = 0.5_wp * (dz_soil(k+1) + dz_soil(k))
1681	ENDDO
1682	dz_soil_stag(nzt_soil) = dz_soil(nzt_soil)
1683
1684	ddz_soil = 1.0_wp / dz_soil
1685	ddz_soil_stag = 1.0_wp / dz_soil_stag
1686
1687	!
1688	!-- Initialize standard soil types. It is possible to overwrite each
1689	!-- parameter by setting the respecticy NAMELIST variable to a
1690	!-- value /= 9999999.9.
1691	IF ( soil_type /= 0 ) THEN
1692
1693	IF ( alpha_vangenuchten == 9999999.9_wp ) THEN
1694	alpha_vangenuchten = soil_pars(0,soil_type)
1695	ENDIF
1696
1697	IF ( l_vangenuchten == 9999999.9_wp ) THEN
1698	l_vangenuchten = soil_pars(1,soil_type)
1699	ENDIF
1700
1701	IF ( n_vangenuchten == 9999999.9_wp ) THEN
1702	n_vangenuchten = soil_pars(2,soil_type)
1703	ENDIF
1704
1705	IF ( hydraulic_conductivity == 9999999.9_wp ) THEN
1706	hydraulic_conductivity = soil_pars(3,soil_type)
1707	ENDIF
1708
1709	IF ( saturation_moisture == 9999999.9_wp ) THEN
1710	saturation_moisture = m_soil_pars(0,soil_type)
1711	ENDIF
1712
1713	IF ( field_capacity == 9999999.9_wp ) THEN
1714	field_capacity = m_soil_pars(1,soil_type)
1715	ENDIF
1716
1717	IF ( wilting_point == 9999999.9_wp ) THEN
1718	wilting_point = m_soil_pars(2,soil_type)
1719	ENDIF
1720
1721	IF ( residual_moisture == 9999999.9_wp ) THEN
1722	residual_moisture = m_soil_pars(3,soil_type)
1723	ENDIF
1724
1725	ENDIF
1726
1727	!
1728	!-- Map values to the respective 2D arrays
1729	alpha_vg = alpha_vangenuchten
1730	l_vg = l_vangenuchten
1731	n_vg = n_vangenuchten
1732	gamma_w_sat = hydraulic_conductivity
1733	m_sat = saturation_moisture
1734	m_fc = field_capacity
1735	m_wilt = wilting_point
1736	m_res = residual_moisture
1737	r_soil_min = min_soil_resistance
1738
1739	!
1740	!-- Initial run actions
1741	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1742
1743	t_soil = 0.0_wp
1744	m_liq_eb = 0.0_wp
1745	m_soil = 0.0_wp
1746
1747	!
1748	!-- Map user settings of T and q for each soil layer
1749	!-- (make sure that the soil moisture does not drop below the permanent
1750	!-- wilting point) -> problems with devision by zero)
1751	DO k = nzb_soil, nzt_soil
1752	t_soil(k,:,:) = soil_temperature(k)
1753	m_soil(k,:,:) = MAX(soil_moisture(k),m_wilt(:,:))
1754	soil_moisture(k) = MAX(soil_moisture(k),wilting_point)
1755	ENDDO
1756	t_soil(nzt_soil+1,:,:) = soil_temperature(nzt_soil+1)
1757
1758	!
1759	!-- Calculate surface temperature
1760	t_surface = pt_surface * exn
1761
1762	!
1763	!-- Set artifical values for ts and us so that r_a has its initial value
1764	!-- for the first time step
1765	DO i = nxlg, nxrg
1766	DO j = nysg, nyng
1767	k = nzb_s_inner(j,i)
1768
1769	IF ( cloud_physics ) THEN
1770	pt1 = pt(k+1,j,i) + l_d_cp * pt_d_t(k+1) * ql(k+1,j,i)
1771	ELSE
1772	pt1 = pt(k+1,j,i)
1773	ENDIF
1774
1775	!
1776	!-- Assure that r_a cannot be zero at model start
1777	IF ( pt1 == pt(k,j,i) ) pt1 = pt1 + 1.0E-10_wp
1778
1779	us(j,i) = 0.1_wp
1780	ts(j,i) = (pt1 - pt(k,j,i)) / r_a(j,i)
1781	shf(j,i) = - us(j,i) * ts(j,i)
1782	ENDDO
1783	ENDDO
1784
1785	!
1786	!-- Actions for restart runs
1787	ELSE
1788
1789	DO i = nxlg, nxrg
1790	DO j = nysg, nyng
1791	k = nzb_s_inner(j,i)
1792	t_surface(j,i) = pt(k,j,i) * exn
1793	ENDDO
1794	ENDDO
1795
1796	ENDIF
1797
1798	DO k = nzb_soil, nzt_soil
1799	root_fr(k,:,:) = root_fraction(k)
1800	ENDDO
1801
1802	IF ( veg_type /= 0 ) THEN
1803	IF ( min_canopy_resistance == 9999999.9_wp ) THEN
1804	min_canopy_resistance = veg_pars(0,veg_type)
1805	ENDIF
1806	IF ( leaf_area_index == 9999999.9_wp ) THEN
1807	leaf_area_index = veg_pars(1,veg_type)
1808	ENDIF
1809	IF ( vegetation_coverage == 9999999.9_wp ) THEN
1810	vegetation_coverage = veg_pars(2,veg_type)
1811	ENDIF
1812	IF ( canopy_resistance_coefficient == 9999999.9_wp ) THEN
1813	canopy_resistance_coefficient= veg_pars(3,veg_type)
1814	ENDIF
1815	IF ( lambda_surface_stable == 9999999.9_wp ) THEN
1816	lambda_surface_stable = surface_pars(0,veg_type)
1817	ENDIF
1818	IF ( lambda_surface_unstable == 9999999.9_wp ) THEN
1819	lambda_surface_unstable = surface_pars(1,veg_type)
1820	ENDIF
1821	IF ( f_shortwave_incoming == 9999999.9_wp ) THEN
1822	f_shortwave_incoming = surface_pars(2,veg_type)
1823	ENDIF
1824	IF ( z0_eb == 9999999.9_wp ) THEN
1825	roughness_length = roughness_par(0,veg_type)
1826	z0_eb = roughness_par(0,veg_type)
1827	ENDIF
1828	IF ( z0h_eb == 9999999.9_wp ) THEN
1829	z0h_eb = roughness_par(1,veg_type)
1830	ENDIF
1831	IF ( z0q_eb == 9999999.9_wp ) THEN
1832	z0q_eb = roughness_par(2,veg_type)
1833	ENDIF
1834	z0h_factor = z0h_eb / ( z0_eb + 1.0E-20_wp )
1835
1836	IF ( ANY( root_fraction == 9999999.9_wp ) ) THEN
1837	DO k = nzb_soil, nzt_soil
1838	root_fr(k,:,:) = root_distribution(k,veg_type)
1839	root_fraction(k) = root_distribution(k,veg_type)
1840	ENDDO
1841	ENDIF
1842
1843	ELSE
1844
1845	IF ( z0_eb == 9999999.9_wp ) THEN
1846	z0_eb = roughness_length
1847	ENDIF
1848	IF ( z0h_eb == 9999999.9_wp ) THEN
1849	z0h_eb = z0_eb * z0h_factor
1850	ENDIF
1851	IF ( z0q_eb == 9999999.9_wp ) THEN
1852	z0q_eb = z0_eb * z0h_factor
1853	ENDIF
1854
1855	ENDIF
1856
1857	!
1858	!-- For surfaces covered with pavement, set depth of the pavement (with dry
1859	!-- soil below). The depth must be greater than the first soil layer depth
1860	IF ( veg_type == 20 ) THEN
1861	IF ( pave_depth == 9999999.9_wp ) THEN
1862	pave_depth = zs(nzb_soil)
1863	ELSE
1864	pave_depth = MAX( zs(nzb_soil), pave_depth )
1865	ENDIF
1866	ENDIF
1867
1868	!
1869	!-- Map vegetation and soil types to 2D array to allow for heterogeneous
1870	!-- surfaces via user interface see below
1871	veg_type_2d = veg_type
1872	soil_type_2d = soil_type
1873
1874	!
1875	!-- Map vegetation parameters to the respective 2D arrays
1876	r_canopy_min = min_canopy_resistance
1877	lai = leaf_area_index
1878	c_veg = vegetation_coverage
1879	g_d = canopy_resistance_coefficient
1880	lambda_surface_s = lambda_surface_stable
1881	lambda_surface_u = lambda_surface_unstable
1882	f_sw_in = f_shortwave_incoming
1883	z0 = z0_eb
1884	z0h = z0h_eb
1885	z0q = z0q_eb
1886
1887	!
1888	!-- Possibly do user-defined actions (e.g. define heterogeneous land surface)
1889	CALL user_init_land_surface
1890
1891	!
1892	!-- Set flag parameter if vegetation type was set to a water surface. Also
1893	!-- set temperature to a constant value in all "soil" layers.
1894	DO i = nxlg, nxrg
1895	DO j = nysg, nyng
1896	IF ( veg_type_2d(j,i) == 14 .OR. veg_type_2d(j,i) == 15 ) THEN
1897	water_surface(j,i) = .TRUE.
1898	t_soil(:,j,i) = t_surface(j,i)
1899	ELSEIF ( veg_type_2d(j,i) == 20 ) THEN
1900	pave_surface(j,i) = .TRUE.
1901	m_soil(:,j,i) = 0.0_wp
1902	ENDIF
1903
1904	ENDDO
1905	ENDDO
1906
1907	!
1908	!-- Calculate new roughness lengths (for water surfaces only)
1909	CALL calc_z0_water_surface
1910
1911	t_soil_p = t_soil
1912	m_soil_p = m_soil
1913	m_liq_eb_p = m_liq_eb
1914	t_surface_p = t_surface
1915
1916
1917
1918	!-- Store initial profiles of t_soil and m_soil (assuming they are
1919	!-- horizontally homogeneous on this PE)
1920	hom(nzb_soil:nzt_soil,1,90,:) = SPREAD( t_soil(nzb_soil:nzt_soil, &
1921	nysg,nxlg), 2, &
1922	statistic_regions+1 )
1923	hom(nzb_soil:nzt_soil,1,92,:) = SPREAD( m_soil(nzb_soil:nzt_soil, &
1924	nysg,nxlg), 2, &
1925	statistic_regions+1 )
1926
1927	END SUBROUTINE lsm_init
1928
1929
1930	!------------------------------------------------------------------------------!
1931	! Description:
1932	! ------------
1933	!> Allocate land surface model arrays and define pointers
1934	!------------------------------------------------------------------------------!
1935	SUBROUTINE lsm_init_arrays
1936
1937
1938	IMPLICIT NONE
1939
1940	!
1941	!-- Allocate surface and soil temperature / humidity
1942	#if defined( __nopointer )
1943	ALLOCATE ( m_liq_eb(nysg:nyng,nxlg:nxrg) )
1944	ALLOCATE ( m_liq_eb_p(nysg:nyng,nxlg:nxrg) )
1945	ALLOCATE ( m_soil(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1946	ALLOCATE ( m_soil_p(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1947	ALLOCATE ( t_surface(nysg:nyng,nxlg:nxrg) )
1948	ALLOCATE ( t_surface_p(nysg:nyng,nxlg:nxrg) )
1949	ALLOCATE ( t_soil(nzb_soil:nzt_soil+1,nysg:nyng,nxlg:nxrg) )
1950	ALLOCATE ( t_soil_p(nzb_soil:nzt_soil+1,nysg:nyng,nxlg:nxrg) )
1951	#else
1952	ALLOCATE ( m_liq_eb_1(nysg:nyng,nxlg:nxrg) )
1953	ALLOCATE ( m_liq_eb_2(nysg:nyng,nxlg:nxrg) )
1954	ALLOCATE ( m_soil_1(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1955	ALLOCATE ( m_soil_2(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1956	ALLOCATE ( t_surface_1(nysg:nyng,nxlg:nxrg) )
1957	ALLOCATE ( t_surface_2(nysg:nyng,nxlg:nxrg) )
1958	ALLOCATE ( t_soil_1(nzb_soil:nzt_soil+1,nysg:nyng,nxlg:nxrg) )
1959	ALLOCATE ( t_soil_2(nzb_soil:nzt_soil+1,nysg:nyng,nxlg:nxrg) )
1960	#endif
1961
1962	!
1963	!-- Allocate intermediate timestep arrays
1964	ALLOCATE ( tm_liq_eb_m(nysg:nyng,nxlg:nxrg) )
1965	ALLOCATE ( tm_soil_m(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1966	ALLOCATE ( tt_surface_m(nysg:nyng,nxlg:nxrg) )
1967	ALLOCATE ( tt_soil_m(nzb_soil:nzt_soil,nysg:nyng,nxlg:nxrg) )
1968
1969	!
1970	!-- Allocate 2D vegetation model arrays
1971	ALLOCATE ( alpha_vg(nysg:nyng,nxlg:nxrg) )
1972	ALLOCATE ( building_surface(nysg:nyng,nxlg:nxrg) )
1973	ALLOCATE ( c_liq(nysg:nyng,nxlg:nxrg) )
1974	ALLOCATE ( c_veg(nysg:nyng,nxlg:nxrg) )
1975	ALLOCATE ( f_sw_in(nysg:nyng,nxlg:nxrg) )
1976	ALLOCATE ( ghf_eb(nysg:nyng,nxlg:nxrg) )
1977	ALLOCATE ( gamma_w_sat(nysg:nyng,nxlg:nxrg) )
1978	ALLOCATE ( g_d(nysg:nyng,nxlg:nxrg) )
1979	ALLOCATE ( lai(nysg:nyng,nxlg:nxrg) )
1980	ALLOCATE ( l_vg(nysg:nyng,nxlg:nxrg) )
1981	ALLOCATE ( lambda_surface_u(nysg:nyng,nxlg:nxrg) )
1982	ALLOCATE ( lambda_surface_s(nysg:nyng,nxlg:nxrg) )
1983	ALLOCATE ( m_fc(nysg:nyng,nxlg:nxrg) )
1984	ALLOCATE ( m_res(nysg:nyng,nxlg:nxrg) )
1985	ALLOCATE ( m_sat(nysg:nyng,nxlg:nxrg) )
1986	ALLOCATE ( m_wilt(nysg:nyng,nxlg:nxrg) )
1987	ALLOCATE ( n_vg(nysg:nyng,nxlg:nxrg) )
1988	ALLOCATE ( pave_surface(nysg:nyng,nxlg:nxrg) )
1989	ALLOCATE ( qsws_eb(nysg:nyng,nxlg:nxrg) )
1990	ALLOCATE ( qsws_soil_eb(nysg:nyng,nxlg:nxrg) )
1991	ALLOCATE ( qsws_liq_eb(nysg:nyng,nxlg:nxrg) )
1992	ALLOCATE ( qsws_veg_eb(nysg:nyng,nxlg:nxrg) )
1993	ALLOCATE ( rad_net_l(nysg:nyng,nxlg:nxrg) )
1994	ALLOCATE ( r_a(nysg:nyng,nxlg:nxrg) )
1995	ALLOCATE ( r_canopy(nysg:nyng,nxlg:nxrg) )
1996	ALLOCATE ( r_soil(nysg:nyng,nxlg:nxrg) )
1997	ALLOCATE ( r_soil_min(nysg:nyng,nxlg:nxrg) )
1998	ALLOCATE ( r_s(nysg:nyng,nxlg:nxrg) )
1999	ALLOCATE ( r_canopy_min(nysg:nyng,nxlg:nxrg) )
2000	ALLOCATE ( shf_eb(nysg:nyng,nxlg:nxrg) )
2001	ALLOCATE ( soil_type_2d(nysg:nyng,nxlg:nxrg) )
2002	ALLOCATE ( veg_type_2d(nysg:nyng,nxlg:nxrg) )
2003	ALLOCATE ( water_surface(nysg:nyng,nxlg:nxrg) )
2004
2005	#if ! defined( __nopointer )
2006	!
2007	!-- Initial assignment of the pointers
2008	t_soil => t_soil_1; t_soil_p => t_soil_2
2009	t_surface => t_surface_1; t_surface_p => t_surface_2
2010	m_soil => m_soil_1; m_soil_p => m_soil_2
2011	m_liq_eb => m_liq_eb_1; m_liq_eb_p => m_liq_eb_2
2012	#endif
2013
2014
2015	END SUBROUTINE lsm_init_arrays
2016
2017
2018	!------------------------------------------------------------------------------!
2019	! Description:
2020	! ------------
2021	!> Parin for &lsmpar for land surface model
2022	!------------------------------------------------------------------------------!
2023	SUBROUTINE lsm_parin
2024
2025
2026	IMPLICIT NONE
2027
2028	CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file
2029
2030	NAMELIST /lsm_par/ alpha_vangenuchten, c_surface, &
2031	canopy_resistance_coefficient, &
2032	conserve_water_content, &
2033	f_shortwave_incoming, field_capacity, &
2034	hydraulic_conductivity, &
2035	lambda_surface_stable, &
2036	lambda_surface_unstable, leaf_area_index, &
2037	l_vangenuchten, min_canopy_resistance, &
2038	min_soil_resistance, n_vangenuchten, &
2039	pave_depth, pave_heat_capacity, &
2040	pave_heat_conductivity, &
2041	residual_moisture, root_fraction, &
2042	saturation_moisture, skip_time_do_lsm, &
2043	soil_moisture, soil_temperature, soil_type, &
2044	vegetation_coverage, veg_type, wilting_point,&
2045	zs, z0_eb, z0h_eb, z0q_eb
2046
2047	line = ' '
2048
2049	!
2050	!-- Try to find land surface model package
2051	REWIND ( 11 )
2052	line = ' '
2053	DO WHILE ( INDEX( line, '&lsm_par' ) == 0 )
2054	READ ( 11, '(A)', END=10 ) line
2055	ENDDO
2056	BACKSPACE ( 11 )
2057
2058	!
2059	!-- Read user-defined namelist
2060	READ ( 11, lsm_par )
2061
2062	!
2063	!-- Set flag that indicates that the land surface model is switched on
2064	land_surface = .TRUE.
2065
2066	10 CONTINUE
2067
2068
2069	END SUBROUTINE lsm_parin
2070
2071
2072	!------------------------------------------------------------------------------!
2073	! Description:
2074	! ------------
2075	!> Soil model as part of the land surface model. The model predicts soil
2076	!> temperature and water content.
2077	!------------------------------------------------------------------------------!
2078	SUBROUTINE lsm_soil_model
2079
2080
2081	IMPLICIT NONE
2082
2083	INTEGER(iwp) :: i !< running index
2084	INTEGER(iwp) :: j !< running index
2085	INTEGER(iwp) :: k !< running index
2086
2087	REAL(wp) :: h_vg !< Van Genuchten coef. h
2088
2089	REAL(wp), DIMENSION(nzb_soil:nzt_soil) :: gamma_temp, & !< temp. gamma
2090	lambda_temp, & !< temp. lambda
2091	tend !< tendency
2092
2093	DO i = nxlg, nxrg
2094	DO j = nysg, nyng
2095
2096	IF ( pave_surface(j,i) ) THEN
2097	rho_c_total(nzb_soil,j,i) = pave_heat_capacity
2098	lambda_temp(nzb_soil) = pave_heat_conductivity
2099	ENDIF
2100
2101	IF ( .NOT. water_surface(j,i) ) THEN
2102	DO k = nzb_soil, nzt_soil
2103
2104
2105	IF ( pave_surface(j,i) .AND. zs(k) <= pave_depth ) THEN
2106
2107	rho_c_total(k,j,i) = pave_heat_capacity
2108	lambda_temp(k) = pave_heat_conductivity
2109
2110	ELSE
2111	!
2112	!-- Calculate volumetric heat capacity of the soil, taking
2113	!-- into account water content
2114	rho_c_total(k,j,i) = (rho_c_soil * (1.0_wp - m_sat(j,i)) &
2115	+ rho_c_water * m_soil(k,j,i))
2116
2117	!
2118	!-- Calculate soil heat conductivity at the center of the soil
2119	!-- layers
2120	lambda_h_sat = lambda_h_sm ** (1.0_wp - m_sat(j,i)) * &
2121	lambda_h_water ** m_soil(k,j,i)
2122
2123	ke = 1.0_wp + LOG10(MAX(0.1_wp,m_soil(k,j,i) &
2124	/ m_sat(j,i)))
2125
2126	lambda_temp(k) = ke * (lambda_h_sat - lambda_h_dry) + &
2127	lambda_h_dry
2128	ENDIF
2129
2130	ENDDO
2131
2132	!
2133	!-- Calculate soil heat conductivity (lambda_h) at the _stag level
2134	!-- using linear interpolation. For pavement surface, the
2135	!-- true pavement depth is considered
2136	DO k = nzb_soil, nzt_soil-1
2137	IF ( pave_surface(j,i) .AND. zs(k) < pave_depth &
2138	.AND. zs(k+1) > pave_depth ) THEN
2139	lambda_h(k,j,i) = ( pave_depth - zs(k) ) / dz_soil(k+1) &
2140	* lambda_temp(k) &
2141	+ ( 1.0_wp - ( pave_depth - zs(k) ) &
2142	/ dz_soil(k+1) ) * lambda_temp(k+1)
2143	ELSE
2144	lambda_h(k,j,i) = ( lambda_temp(k+1) + lambda_temp(k) ) &
2145	* 0.5_wp
2146	ENDIF
2147	ENDDO
2148	lambda_h(nzt_soil,j,i) = lambda_temp(nzt_soil)
2149
2150
2151
2152
2153	!
2154	!-- Prognostic equation for soil temperature t_soil
2155	tend(:) = 0.0_wp
2156
2157	tend(nzb_soil) = (1.0_wp/rho_c_total(nzb_soil,j,i)) * &
2158	( lambda_h(nzb_soil,j,i) * ( t_soil(nzb_soil+1,j,i) &
2159	- t_soil(nzb_soil,j,i) ) * ddz_soil(nzb_soil+1) &
2160	+ ghf_eb(j,i) ) * ddz_soil_stag(nzb_soil)
2161
2162	DO k = nzb_soil+1, nzt_soil
2163	tend(k) = (1.0_wp/rho_c_total(k,j,i)) &
2164	* ( lambda_h(k,j,i) &
2165	* ( t_soil(k+1,j,i) - t_soil(k,j,i) ) &
2166	* ddz_soil(k+1) &
2167	- lambda_h(k-1,j,i) &
2168	* ( t_soil(k,j,i) - t_soil(k-1,j,i) ) &
2169	* ddz_soil(k) &
2170	) * ddz_soil_stag(k)
2171
2172	ENDDO
2173
2174	t_soil_p(nzb_soil:nzt_soil,j,i) = t_soil(nzb_soil:nzt_soil,j,i)&
2175	+ dt_3d * ( tsc(2) &
2176	* tend(nzb_soil:nzt_soil) &
2177	+ tsc(3) &
2178	* tt_soil_m(:,j,i) )
2179
2180	!
2181	!-- Calculate t_soil tendencies for the next Runge-Kutta step
2182	IF ( timestep_scheme(1:5) == 'runge' ) THEN
2183	IF ( intermediate_timestep_count == 1 ) THEN
2184	DO k = nzb_soil, nzt_soil
2185	tt_soil_m(k,j,i) = tend(k)
2186	ENDDO
2187	ELSEIF ( intermediate_timestep_count < &
2188	intermediate_timestep_count_max ) THEN
2189	DO k = nzb_soil, nzt_soil
2190	tt_soil_m(k,j,i) = -9.5625_wp * tend(k) + 5.3125_wp &
2191	* tt_soil_m(k,j,i)
2192	ENDDO
2193	ENDIF
2194	ENDIF
2195
2196
2197	DO k = nzb_soil, nzt_soil
2198
2199	!
2200	!-- Calculate soil diffusivity at the center of the soil layers
2201	lambda_temp(k) = (- b_ch * gamma_w_sat(j,i) * psi_sat &
2202	/ m_sat(j,i) ) * ( MAX( m_soil(k,j,i), &
2203	m_wilt(j,i) ) / m_sat(j,i) )**( &
2204	b_ch + 2.0_wp )
2205
2206	!
2207	!-- Parametrization of Van Genuchten
2208	IF ( soil_type /= 7 ) THEN
2209	!
2210	!-- Calculate the hydraulic conductivity after Van Genuchten
2211	!-- (1980)
2212	h_vg = ( ( (m_res(j,i) - m_sat(j,i)) / ( m_res(j,i) - &
2213	MAX( m_soil(k,j,i), m_wilt(j,i) ) ) )**( &
2214	n_vg(j,i) / (n_vg(j,i) - 1.0_wp ) ) - 1.0_wp &
2215	)**( 1.0_wp / n_vg(j,i) ) / alpha_vg(j,i)
2216
2217
2218	gamma_temp(k) = gamma_w_sat(j,i) * ( ( (1.0_wp + &
2219	( alpha_vg(j,i) * h_vg )n_vg(j,i))( &
2220	1.0_wp - 1.0_wp / n_vg(j,i) ) - ( &
2221	alpha_vg(j,i) * h_vg )**( n_vg(j,i) &
2222	- 1.0_wp) )**2 ) &
2223	/ ( ( 1.0_wp + ( alpha_vg(j,i) * h_vg &
2224	)n_vg(j,i) )( ( 1.0_wp - 1.0_wp &
2225	/ n_vg(j,i) ) *( l_vg(j,i) + 2.0_wp) ) )
2226
2227	!
2228	!-- Parametrization of Clapp & Hornberger
2229	ELSE
2230	gamma_temp(k) = gamma_w_sat(j,i) * ( m_soil(k,j,i) &
2231	/ m_sat(j,i) )*(2.0_wp b_ch + 3.0_wp)
2232	ENDIF
2233
2234	ENDDO
2235
2236	!
2237	!-- Prognostic equation for soil moisture content. Only performed,
2238	!-- when humidity is enabled in the atmosphere and the surface type
2239	!-- is not pavement (implies dry soil below).
2240	IF ( humidity .AND. .NOT. pave_surface(j,i) ) THEN
2241	!
2242	!-- Calculate soil diffusivity (lambda_w) at the _stag level
2243	!-- using linear interpolation. To do: replace this with
2244	!-- ECMWF-IFS Eq. 8.81
2245	DO k = nzb_soil, nzt_soil-1
2246
2247	lambda_w(k,j,i) = ( lambda_temp(k+1) + lambda_temp(k) ) &
2248	* 0.5_wp
2249	gamma_w(k,j,i) = ( gamma_temp(k+1) + gamma_temp(k) ) &
2250	* 0.5_wp
2251
2252	ENDDO
2253
2254	!
2255	!
2256	!-- In case of a closed bottom (= water content is conserved),
2257	!-- set hydraulic conductivity to zero to that no water will be
2258	!-- lost in the bottom layer.
2259	IF ( conserve_water_content ) THEN
2260	gamma_w(nzt_soil,j,i) = 0.0_wp
2261	ELSE
2262	gamma_w(nzt_soil,j,i) = gamma_temp(nzt_soil)
2263	ENDIF
2264
2265	!-- The root extraction (= root_extr * qsws_veg_eb / (rho_l
2266	!-- * l_v)) ensures the mass conservation for water. The
2267	!-- transpiration of plants equals the cumulative withdrawals by
2268	!-- the roots in the soil. The scheme takes into account the
2269	!-- availability of water in the soil layers as well as the root
2270	!-- fraction in the respective layer. Layer with moisture below
2271	!-- wilting point will not contribute, which reflects the
2272	!-- preference of plants to take water from moister layers.
2273
2274	!
2275	!-- Calculate the root extraction (ECMWF 7.69, the sum of
2276	!-- root_extr = 1). The energy balance solver guarantees a
2277	!-- positive transpiration, so that there is no need for an
2278	!-- additional check.
2279	DO k = nzb_soil, nzt_soil
2280	IF ( m_soil(k,j,i) > m_wilt(j,i) ) THEN
2281	m_total = m_total + root_fr(k,j,i) * m_soil(k,j,i)
2282	ENDIF
2283	ENDDO
2284
2285	IF ( m_total > 0.0_wp ) THEN
2286	DO k = nzb_soil, nzt_soil
2287	IF ( m_soil(k,j,i) > m_wilt(j,i) ) THEN
2288	root_extr(k) = root_fr(k,j,i) * m_soil(k,j,i) &
2289	/ m_total
2290	ELSE
2291	root_extr(k) = 0.0_wp
2292	ENDIF
2293	ENDDO
2294	ENDIF
2295
2296	!
2297	!-- Prognostic equation for soil water content m_soil.
2298	tend(:) = 0.0_wp
2299
2300	tend(nzb_soil) = ( lambda_w(nzb_soil,j,i) * ( &
2301	m_soil(nzb_soil+1,j,i) - m_soil(nzb_soil,j,i) ) &
2302	* ddz_soil(nzb_soil+1) - gamma_w(nzb_soil,j,i) - ( &
2303	root_extr(nzb_soil) * qsws_veg_eb(j,i) &
2304	+ qsws_soil_eb(j,i) ) * drho_l_lv ) &
2305	* ddz_soil_stag(nzb_soil)
2306
2307	DO k = nzb_soil+1, nzt_soil-1
2308	tend(k) = ( lambda_w(k,j,i) * ( m_soil(k+1,j,i) &
2309	- m_soil(k,j,i) ) * ddz_soil(k+1) &
2310	- gamma_w(k,j,i) &
2311	- lambda_w(k-1,j,i) * (m_soil(k,j,i) - &
2312	m_soil(k-1,j,i)) * ddz_soil(k) &
2313	+ gamma_w(k-1,j,i) - (root_extr(k) &
2314	* qsws_veg_eb(j,i) * drho_l_lv) &
2315	) * ddz_soil_stag(k)
2316
2317	ENDDO
2318	tend(nzt_soil) = ( - gamma_w(nzt_soil,j,i) &
2319	- lambda_w(nzt_soil-1,j,i) &
2320	* (m_soil(nzt_soil,j,i) &
2321	- m_soil(nzt_soil-1,j,i)) &
2322	* ddz_soil(nzt_soil) &
2323	+ gamma_w(nzt_soil-1,j,i) - ( &
2324	root_extr(nzt_soil) &
2325	* qsws_veg_eb(j,i) * drho_l_lv ) &
2326	) * ddz_soil_stag(nzt_soil)
2327
2328	m_soil_p(nzb_soil:nzt_soil,j,i) = m_soil(nzb_soil:nzt_soil,j,i)&
2329	+ dt_3d * ( tsc(2) * tend(:) &
2330	+ tsc(3) * tm_soil_m(:,j,i) )
2331
2332	!
2333	!-- Account for dry soils (find a better solution here!)
2334	DO k = nzb_soil, nzt_soil
2335	IF ( m_soil_p(k,j,i) < 0.0_wp ) m_soil_p(k,j,i) = 0.0_wp
2336	ENDDO
2337
2338	!
2339	!-- Calculate m_soil tendencies for the next Runge-Kutta step
2340	IF ( timestep_scheme(1:5) == 'runge' ) THEN
2341	IF ( intermediate_timestep_count == 1 ) THEN
2342	DO k = nzb_soil, nzt_soil
2343	tm_soil_m(k,j,i) = tend(k)
2344	ENDDO
2345	ELSEIF ( intermediate_timestep_count < &
2346	intermediate_timestep_count_max ) THEN
2347	DO k = nzb_soil, nzt_soil
2348	tm_soil_m(k,j,i) = -9.5625_wp * tend(k) + 5.3125_wp&
2349	* tm_soil_m(k,j,i)
2350	ENDDO
2351	ENDIF
2352	ENDIF
2353
2354	ENDIF
2355
2356	ENDIF
2357
2358	ENDDO
2359	ENDDO
2360
2361	END SUBROUTINE lsm_soil_model
2362
2363
2364	!------------------------------------------------------------------------------!
2365	! Description:
2366	! ------------
2367	!> Swapping of timelevels
2368	!------------------------------------------------------------------------------!
2369	SUBROUTINE lsm_swap_timelevel ( mod_count )
2370
2371	IMPLICIT NONE
2372
2373	INTEGER, INTENT(IN) :: mod_count
2374
2375	#if defined( __nopointer )
2376
2377	t_surface = t_surface_p
2378	t_soil = t_soil_p
2379	IF ( humidity ) THEN
2380	m_soil = m_soil_p
2381	m_liq_eb = m_liq_eb_p
2382	ENDIF
2383
2384	#else
2385
2386	SELECT CASE ( mod_count )
2387
2388	CASE ( 0 )
2389
2390	t_surface => t_surface_1; t_surface_p => t_surface_2
2391	t_soil => t_soil_1; t_soil_p => t_soil_2
2392	IF ( humidity ) THEN
2393	m_soil => m_soil_1; m_soil_p => m_soil_2
2394	m_liq_eb => m_liq_eb_1; m_liq_eb_p => m_liq_eb_2
2395	ENDIF
2396
2397
2398	CASE ( 1 )
2399
2400	t_surface => t_surface_2; t_surface_p => t_surface_1
2401	t_soil => t_soil_2; t_soil_p => t_soil_1
2402	IF ( humidity ) THEN
2403	m_soil => m_soil_2; m_soil_p => m_soil_1
2404	m_liq_eb => m_liq_eb_2; m_liq_eb_p => m_liq_eb_1
2405	ENDIF
2406
2407	END SELECT
2408	#endif
2409
2410	END SUBROUTINE lsm_swap_timelevel
2411
2412
2413	!------------------------------------------------------------------------------!
2414	! Description:
2415	! ------------
2416	!> Calculation of roughness length for open water (lakes, ocean). The
2417	!> parameterization follows Charnock (1955). Two different implementations
2418	!> are available: as in ECMWF-IFS (Beljaars 1994) or as in FLake (Subin et al.
2419	!> 2012)
2420	!------------------------------------------------------------------------------!
2421	SUBROUTINE calc_z0_water_surface
2422
2423	USE control_parameters, &
2424	ONLY: g, kappa, molecular_viscosity
2425
2426	IMPLICIT NONE
2427
2428	INTEGER :: i !< running index
2429	INTEGER :: j !< running index
2430
2431	REAL(wp), PARAMETER :: alpha_ch = 0.018_wp !< Charnock constant (0.01-0.11). Use 0.01 for FLake and 0.018 for ECMWF
2432	! REAL(wp), PARAMETER :: pr_number = 0.71_wp !< molecular Prandtl number in the Charnock parameterization (differs from prandtl_number)
2433	! REAL(wp), PARAMETER :: sc_number = 0.66_wp !< molecular Schmidt number in the Charnock parameterization
2434	! REAL(wp) :: re_0 !< near-surface roughness Reynolds number
2435
2436
2437	DO i = nxlg, nxrg
2438	DO j = nysg, nyng
2439	IF ( water_surface(j,i) ) THEN
2440
2441	!
2442	!-- Disabled: FLake parameterization. Ideally, the Charnock
2443	!-- coefficient should depend on the water depth and the fetch
2444	!-- length
2445	! re_0 = z0(j,i) * us(j,i) / molecular_viscosity
2446	!
2447	! z0(j,i) = MAX( 0.1_wp * molecular_viscosity / us(j,i), &
2448	! alpha_ch * us(j,i) / g )
2449	!
2450	! z0h(j,i) = z0(j,i) * EXP( - kappa / pr_number * ( 4.0_wp * SQRT( re_0 ) - 3.2_wp ) )
2451	! z0q(j,i) = z0(j,i) * EXP( - kappa / pr_number * ( 4.0_wp * SQRT( re_0 ) - 4.2_wp ) )
2452
2453	!
2454	!-- Set minimum roughness length for u* > 0.2
2455	! IF ( us(j,i) > 0.2_wp ) THEN
2456	! z0h(j,i) = MAX( 1.0E-5_wp, z0h(j,i) )
2457	! z0q(j,i) = MAX( 1.0E-5_wp, z0q(j,i) )
2458	! ENDIF
2459
2460	!
2461	!-- ECMWF IFS model parameterization after Beljaars (1994). At low
2462	!-- wind speed, the sea surface becomes aerodynamically smooth and
2463	!-- the roughness scales with the viscosity. At high wind speed, the
2464	!-- Charnock relation is used.
2465	z0(j,i) = ( 0.11_wp * molecular_viscosity / us(j,i) ) &
2466	+ ( alpha_ch * us(j,i)**2 / g )
2467
2468	z0h(j,i) = 0.40_wp * molecular_viscosity / us(j,i)
2469	z0q(j,i) = 0.62_wp * molecular_viscosity / us(j,i)
2470
2471	ENDIF
2472	ENDDO
2473	ENDDO
2474
2475	END SUBROUTINE calc_z0_water_surface
2476
2477
2478	!------------------------------------------------------------------------------!
2479	! Description:
2480	! ------------
2481	!> Calculation of specific humidity of the skin layer (surface). It is assumend
2482	!> that the skin is always saturated.
2483	!------------------------------------------------------------------------------!
2484	SUBROUTINE calc_q_surface
2485
2486	IMPLICIT NONE
2487
2488	INTEGER :: i !< running index
2489	INTEGER :: j !< running index
2490	INTEGER :: k !< running index
2491
2492	REAL(wp) :: resistance !< aerodynamic and soil resistance term
2493
2494	DO i = nxlg, nxrg
2495	DO j = nysg, nyng
2496	k = nzb_s_inner(j,i)
2497
2498	!
2499	!-- Calculate water vapour pressure at saturation
2500	e_s = 0.01_wp * 610.78_wp * EXP( 17.269_wp * ( t_surface_p(j,i) &
2501	- 273.16_wp ) / ( t_surface_p(j,i) - 35.86_wp ) )
2502
2503	!
2504	!-- Calculate specific humidity at saturation
2505	q_s = 0.622_wp * e_s / surface_pressure
2506
2507	resistance = r_a(j,i) / (r_a(j,i) + r_s(j,i))
2508
2509	!
2510	!-- Calculate specific humidity at surface
2511	IF ( cloud_physics ) THEN
2512	q(k,j,i) = resistance * q_s + (1.0_wp - resistance) &
2513	* ( q(k+1,j,i) - ql(k+1,j,i) )
2514	ELSE
2515	q(k,j,i) = resistance * q_s + (1.0_wp - resistance) &
2516	* q(k+1,j,i)
2517	ENDIF
2518
2519	!
2520	!-- Update virtual potential temperature
2521	vpt(k,j,i) = pt(k,j,i) * ( 1.0_wp + 0.61_wp * q(k,j,i) )
2522
2523	ENDDO
2524	ENDDO
2525
2526	END SUBROUTINE calc_q_surface
2527
2528
2529	END MODULE land_surface_model_mod

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