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source: palm/trunk/SOURCE/chem_photolysis_mod.f90 @ 4798

Last change on this file since 4798 was 4577, checked in by raasch, 4 years ago
further re-formatting to follow the PALM coding standard
Property svn:keywords set to `Id`
File size: 11.3 KB

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1	!> @file chem_photolysis_mod.f90
2	!--------------------------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the terms of the GNU General
6	! Public License as published by the Free Software Foundation, either version 3 of the License, or
7	! (at your option) any later version.
8	!
9	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
10	! implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
11	! Public License for more details.
12	!
13	! You should have received a copy of the GNU General Public License along with PALM. If not, see
14	! <http://www.gnu.org/licenses/>.
15	!
16	! Copyright 2018-2020 Leibniz Universitaet Hannover
17	! Copyright 2018-2020 Karlsruhe Institute of Technology
18	!--------------------------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: chem_photolysis_mod.f90 4577 2020-06-25 09:53:58Z schwenkel $
27	! further re-formatting to follow the PALM coding standard
28	!
29	! 4559 2020-06-11 08:51:48Z raasch
30	! file re-formatted to follow the PALM coding standard
31	!
32	! 4481 2020-03-31 18:55:54Z maronga
33	! Change call to calc_zenith
34	!
35	! 4223 2019-09-10 09:20:47Z gronemeier
36	! Corrected "Former revisions" section
37	!
38	! 3876 2019-04-08 18:41:49Z knoop
39	! some formatting and comments added
40	!
41	! 3824 2019-03-27 15:56:16Z pavelkrc
42	! unused variables removed
43	!
44	! 2718 2018-01-02 08:49:38Z maronga
45	! Initial revision
46	!
47	!
48	! Authors:
49	! --------
50	! @author Renate Forkel
51	!
52	!--------------------------------------------------------------------------------------------------!
53	! Description:
54	! ------------
55	!> photolysis models and interfaces (Adapted from photolysis_model_mod.f90)
56	!> @todo more complex scheme, add shading
57	!--------------------------------------------------------------------------------------------------!
58	MODULE chem_photolysis_mod
59
60	! USE arrays_3d, &
61	! ONLY: dzw, q, ql, zu, zw
62
63	USE control_parameters, &
64	ONLY: time_since_reference_point
65
66	USE pegrid, &
67	ONLY: myid, threads_per_task
68
69	USE indices, &
70	ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt
71
72	USE control_parameters, &
73	ONLY: initializing_actions
74
75	USE chem_gasphase_mod, &
76	ONLY: nphot, phot, phot_names
77
78	USE chem_modules, &
79	ONLY: phot_frequen, photolysis_scheme
80
81	USE chem_modules, &
82	ONLY: chem_debug2
83
84	USE kinds
85
86	#if defined ( __netcdf )
87	USE NETCDF
88	#endif
89
90
91	IMPLICIT NONE
92
93
94	! LOGICAL :: unscheduled_photolysis_calls = .TRUE., & !< flag parameter indicating whether additional calls of the photolysis
95	! !< code are allowed
96	! constant_albedo = .FALSE., & !< flag parameter indicating whether the albedo may change depending on
97	! !< zenith
98	! force_photolysis_call = .FALSE., & !< flag parameter for unscheduled photolysis calls
99	! photolysis = .FALSE., & !< flag parameter indicating whether the photolysis model is used
100	! sun_up = .TRUE., & !< flag parameter indicating whether the sun is up or down
101	! photolysis = .TRUE., & !< flag parameter indicing whether photolysis shall be calculated
102	! sun_direction = .FALSE. !< flag parameter indicing whether solar direction shall be calculated
103
104	!
105	!-- Parameters for constant photolysis frequencies
106	INTEGER,PARAMETER :: nconst = 15 !< available predefined photolysis prequencies for constant
107	!
108	!-- Names for predefined fixed photolysis frequencies at zenith angle 0
109	CHARACTER(LEN=10), PARAMETER, DIMENSION(nconst) :: names_c = (/ &
110	'J_O31D ','J_O33P ','J_NO2 ','J_HNO3 ','J_RCHO ', &
111	'J ','J ','J ','J ','J ', &
112	'J ','J ','J ','J ','J ' /)
113	!
114	!-- Photolysis frequency at zenith angle 0 degrees in 1/s
115	REAL(wp), PARAMETER, DIMENSION(nconst) :: phot0 = (/ &
116	2.489E-05_wp, 3.556E-04_wp, 8.89E-03_wp,5.334E-07_wp, 3.734E-05_wp, &
117	0.0000E00_wp, 0.0000E00_wp, 0.0000E00_wp,0.0000E00_wp, 0.0000E00_wp, &
118	0.0000E00_wp, 0.0000E00_wp, 0.0000E00_wp,0.0000E00_wp, 0.0000E00_wp /)
119	!
120	!-- Parameters for simple photolysis frequencies from MCM (http://mcm.leeds.ac.uk/MCM)
121	!-- Saunders et al., 2003, Atmos. Chem. Phys., 3, 161-180
122	INTEGER,PARAMETER :: nsimple = 15 !< available predefined photolysis prequencies for simple parameterisation
123	!
124	!-- Names for simple photolysis frequencies parameterisation (
125	CHARACTER(LEN=10), PARAMETER, DIMENSION(nsimple) :: names_s = (/ &
126	'J_O31D ','J_O33P ','J_H2O2 ','J_NO2 ','J_NO3_A ', &
127	'J_NO3_B ','J_HONO ','J_HNO3 ','J_HCHO_A ','J_HCHO_B ', &
128	'J_CH3CHO ','J ','J ','J ','J_RCHO ' /)
129	!
130	!-- Species dependent parameters for simple photolysis frequencies from MCM
131	!-- (http://mcm.leeds.ac.uk/MCM)
132	!-- J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
133	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_l = (/ &
134	6.073E-05_wp, 4.775E-04_wp, 1.041E-05_wp, 1.165E-02_wp, 2.485E-02_wp, &
135	1.747E-01_wp, 2.644E-03_wp, 9.312E-07_wp, 4.642E-05_wp, 6.853E-05_wp, &
136	7.344E-06_wp, 0.0000E00_wp, 0.0000E00_wp, 0.000E00_wp, 6.853E-05_wp /)
137
138	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_m = (/ &
139	1.743_wp, 0.298_wp, 0.723_wp, 0.244_wp, 0.168_wp, &
140	0.155_wp, 0.261_wp, 1.230_wp, 0.762_wp, 0.477_wp, &
141	1.202_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.477_wp /)
142
143	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_n = (/ &
144	0.474_wp, 0.080_wp, 0.279_wp, 0.267_wp, 0.108_wp, &
145	0.125_wp, 0.288_wp, 0.307_wp, 0.353_wp, 0.323_wp, &
146	0.417_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.323_wp /)
147
148
149	REAL(wp) :: cosz = 0.7_wp !< cosine of fixed zenith angle (45 deg, if not
150	!< specified otherwise)
151
152
153	INTERFACE photolysis_constant
154	MODULE PROCEDURE photolysis_constant
155	END INTERFACE photolysis_constant
156
157	INTERFACE photolysis_simple
158	MODULE PROCEDURE photolysis_simple
159	END INTERFACE photolysis_simple
160	!
161	! INTERFACE photolysis_fastj
162	! MODULE PROCEDURE photolysis_fastj
163	! END INTERFACE photolysis_fastj
164	!
165	INTERFACE photolysis_control
166	MODULE PROCEDURE photolysis_control
167	END INTERFACE photolysis_control
168
169	SAVE
170
171	PRIVATE
172
173	PUBLIC photolysis_control
174
175	PUBLIC photolysis_scheme
176
177	CONTAINS
178
179
180	!--------------------------------------------------------------------------------------------------!
181	! Description:
182	! ------------
183	!> This subroutine controls the calls of the photolysis schemes.
184	!--------------------------------------------------------------------------------------------------!
185	SUBROUTINE photolysis_control
186
187	IMPLICIT NONE
188
189	SELECT CASE ( TRIM( photolysis_scheme ) )
190
191	CASE ( 'constant' )
192	CALL photolysis_constant
193
194	CASE ( 'simple' )
195	CALL photolysis_simple
196
197	! CASE ( 'fastj' )
198	! CALL photolysis_fastj
199
200	CASE DEFAULT
201
202	END SELECT
203
204
205	END SUBROUTINE photolysis_control
206
207
208	!--------------------------------------------------------------------------------------------------!
209	! Description:
210	! ------------
211	!> This scheme keeps the prescribed net radiation constant during the run.
212	!> Default zenith angle is 45 deg
213	!--------------------------------------------------------------------------------------------------!
214	SUBROUTINE photolysis_constant
215
216	IMPLICIT NONE
217
218	INTEGER(iwp) :: iphot,iav !< loop index for photolysis reaction
219
220	DO iphot = 1, nphot
221	DO iav = 1, nconst
222	IF ( TRIM( names_c(iav) ) == TRIM( phot_names(iphot) ) ) THEN
223	!-- Prescribe fixed photolysis frequencies [1/s]
224	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = phot0(iav) * cosz
225	ENDIF
226	ENDDO
227	ENDDO
228
229
230	END SUBROUTINE photolysis_constant
231
232
233	!--------------------------------------------------------------------------------------------------!
234	! Description:
235	! ------------
236	!> This scheme applies a simple parameterisation for clear sky photolysis frequencies from the
237	!> Master Chemical Mechanism, MCM v3.2 (http://mcm.leeds.ac.uk/MCM).
238	!> Reference: Saunders et al., Atmos. Chem. Phys., 3, 161, 2003
239	!> J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
240	!--------------------------------------------------------------------------------------------------!
241	SUBROUTINE photolysis_simple
242
243	USE palm_date_time_mod, &
244	ONLY: get_date_time
245
246	USE radiation_model_mod, &
247	ONLY: calc_zenith, cos_zenith
248
249	IMPLICIT NONE
250
251	INTEGER(iwp) :: day_of_year !< day of the year
252	INTEGER(iwp) :: iav !< loop indix for photolysis reaction
253	INTEGER(iwp) :: iphot !< loop indix for photolysis reaction
254
255	REAL(wp) :: coszi !< 1./cosine of zenith angle
256	REAL(wp) :: second_of_day !< second of the day
257
258	DO iphot = 1, nphot
259	phot_frequen(iphot)%freq = 0.0_wp
260	ENDDO
261
262	CALL get_date_time( time_since_reference_point, day_of_year = day_of_year, &
263	second_of_day=second_of_day )
264	CALL calc_zenith( day_of_year, second_of_day )
265
266	IF ( cos_zenith > 0.0_wp ) THEN
267	coszi = 1.0_wp / cos_zenith
268
269	DO iphot = 1, nphot
270	DO iav = 1, nsimple
271	IF ( TRIM( names_s(iav) ) == TRIM( phot_names(iphot) ) ) THEN
272	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = par_l(iav) * cos_zenith*par_m(iav) &
273	EXP( - par_n(iav) * coszi )
274	ENDIF
275	ENDDO
276	ENDDO
277	ENDIF
278
279
280	END SUBROUTINE photolysis_simple
281
282	END MODULE chem_photolysis_mod

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