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source: palm/trunk/SOURCE/chem_photolysis_mod.f90 @ 3424

Last change on this file since 3424 was 3298, checked in by kanani, 6 years ago
Merge chemistry branch at r3297 to trunk
Property svn:keywords set to `Id`
File size: 10.1 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
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 2018-2018 Leibniz Universitaet Hannover
18	! Copyright 2018-2018 Karlsruhe Institute of Technology
19	!------------------------------------------------------------------------------!
20	!
21	! Current revisions:
22	! -----------------
23	!
24	!
25	! Former revisions:
26	! -----------------
27	! $Id: chem_photolysis_mod.f90 3298 2018-10-02 12:21:11Z gronemeier $
28	! Moved USE radiation_model_mod from MODULE section into Subroutine
29	! in order to use constant photolysis without radiation module (forkel)
30	!
31	! 3287 2018-09-28 10:19:58Z forkel
32	! Modularization of all bulk cloud physics code components
33	!
34	! 3241 2018-09-12 15:02:00Z raasch
35	! unused variables commented
36	!
37	! 2766 2018-01-22 17:17:47Z kanani
38	! Removed preprocessor directive __chem
39	!
40	! 2718 2018-01-02 08:49:38Z maronga
41	! Initial revision
42	!
43	!
44	! Authors:
45	! --------
46	! @author Renate Forkel
47	!
48	!------------------------------------------------------------------------------!
49	! Description:
50	! ------------
51	!> photolysis models and interfaces (Adapted from photolysis_model_mod.f90)
52	!> @todo Alles!
53	!------------------------------------------------------------------------------!
54	MODULE chem_photolysis_mod
55
56	! USE arrays_3d, &
57	! ONLY: dzw, q, ql, zu, zw
58
59	USE control_parameters, &
60	ONLY: time_since_reference_point
61
62	USE pegrid, ONLY: myid, threads_per_task
63
64	USE indices, &
65	ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt
66
67	USE control_parameters, &
68	ONLY: initializing_actions
69
70	USE chem_gasphase_mod, &
71	ONLY: nphot, phot_names, phot
72
73	USE chemistry_model_mod, &
74	ONLY: phot_frequen, photolysis_scheme
75
76	USE chem_modules, &
77	ONLY: chem_debug2
78
79	USE kinds
80
81	#if defined ( __netcdf )
82	USE NETCDF
83	#endif
84
85
86	IMPLICIT NONE
87
88
89	! LOGICAL :: unscheduled_photolysis_calls = .TRUE., & !< flag parameter indicating whether additional calls of the photolysis code are allowed
90	! constant_albedo = .FALSE., & !< flag parameter indicating whether the albedo may change depending on zenith
91	! force_photolysis_call = .FALSE., & !< flag parameter for unscheduled photolysis calls
92	! photolysis = .FALSE., & !< flag parameter indicating whether the photolysis model is used
93	! sun_up = .TRUE., & !< flag parameter indicating whether the sun is up or down
94	! photolysis = .TRUE., & !< flag parameter indicing whether photolysis shall be calculated
95	! sun_direction = .FALSE. !< flag parameter indicing whether solar direction shall be calculated
96
97	!-- Parameters for constant photolysis frequencies
98	INTEGER,PARAMETER :: nconst = 15 !< available predefined photolysis prequencies for constant
99
100	! Names for predefined fixed photolysis frequencies at zenith angle 0
101	CHARACTER(LEN=10), PARAMETER, DIMENSION(nconst) :: names_c = (/ &
102	'J_O31D ','J_O33P ','J_NO2 ','J_HNO3 ','J_RCHO ', &
103	'J ','J ','J ','J ','J ', &
104	'J ','J ','J ','J ','J ' /)
105	! Photolysis frequency at zenith angle 0 in 1/s
106	REAL(wp), PARAMETER, DIMENSION(nconst) :: phot0 = (/ &
107	2.489E-05_wp,3.556E-04_wp, 8.89E-03_wp,5.334E-07_wp,3.734E-05_wp, &
108	0.0000E00_wp,0.0000E00_wp,0.0000E00_wp,0.0000E00_wp,0.0000E00_wp, &
109	0.0000E00_wp,0.0000E00_wp,0.0000E00_wp,0.0000E00_wp,0.0000E00_wp /)
110
111
112	!-- Parameters for simple photolysis frequencies
113	INTEGER,PARAMETER :: nsimple = 15 !< available predefined photolysis prequencies for simpel parameterisation
114	! Names for simple photolysis frequencies parameterisation (
115	CHARACTER(LEN=10), PARAMETER, DIMENSION(nsimple) :: names_s = (/ &
116	'J_O31D ','J_O33P ','J_H2O2 ','J_NO2 ','J_NO3_A ', &
117	'J_NO3_B ','J_HONO ','J_HNO3 ','J_HCHO_A ','J_HCHO_B ', &
118	'J_CH3CHO ','J ','J ','J ','J_RCHO ' /)
119
120	!-- Parameters for simeple photolysis frequencies from MCM (http://mcm.leeds.ac.uk/MCM)
121	!-- Saunders et al., 2003, Atmos. Chem. Phys., 3, 161-180
122	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_l = (/ &
123	6.073E-05_wp,4.775E-04_wp,1.041E-05_wp,1.165E-02_wp,2.485E-02_wp, &
124	1.747E-01_wp,2.644E-03_wp,9.312E-07_wp,4.642E-05_wp,6.853E-05_wp, &
125	7.344E-06_wp,0.0000E00_wp,0.0000E00_wp,0.000E00_wp, 6.853E-05_wp /)
126
127	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_m = (/ &
128	1.743_wp, 0.298_wp, 0.723_wp, 0.244_wp, 0.168_wp, &
129	0.155_wp, 0.261_wp, 1.230_wp, 0.762_wp, 0.477_wp, &
130	1.202_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.477_wp /)
131
132	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_n = (/ &
133	0.474_wp, 0.080_wp, 0.279_wp, 0.267_wp, 0.108_wp, &
134	0.125_wp, 0.288_wp, 0.307_wp, 0.353_wp, 0.323_wp, &
135	0.417_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.323_wp /)
136
137
138	REAL(wp) :: time_photolysis = 0.0_wp, & !< time since last call of photolysis code
139	dt_photolysis = 0.0_wp, & !< hotolysis model timestep
140	skip_time_do_photolysis = 0.0_wp !< Radiation model is not called before this time
141
142	REAL(wp) :: cosz = 0.7_wp !< cosine of Zenith angle (45 deg, if not specified otherwise)
143
144	!
145	INTERFACE photolysis_constant
146	MODULE PROCEDURE photolysis_constant
147	END INTERFACE photolysis_constant
148
149	INTERFACE photolysis_simple
150	MODULE PROCEDURE photolysis_simple
151	END INTERFACE photolysis_simple
152	!
153	! INTERFACE photolysis_fastj
154	! MODULE PROCEDURE photolysis_fastj
155	! END INTERFACE photolysis_fastj
156	!
157	INTERFACE photolysis_control
158	MODULE PROCEDURE photolysis_control
159	END INTERFACE photolysis_control
160
161
162	SAVE
163
164	PRIVATE
165
166	PUBLIC photolysis_control
167
168	PUBLIC photolysis_scheme
169	!
170
171	CONTAINS
172
173
174	!------------------------------------------------------------------------------!
175	! Description:
176	! ------------
177	!> This subroutine controls the calls of the photolysis schemes
178	!------------------------------------------------------------------------------!
179	SUBROUTINE photolysis_control
180
181	IMPLICIT NONE
182
183	SELECT CASE ( TRIM( photolysis_scheme ) )
184
185	CASE ( 'constant' )
186	CALL photolysis_constant
187
188	CASE ( 'simple' )
189	CALL photolysis_simple
190
191	! CASE ( 'fastj' )
192	! CALL photolysis_fastj
193
194	CASE DEFAULT
195
196	END SELECT
197
198
199	END SUBROUTINE photolysis_control
200
201
202	!------------------------------------------------------------------------------!
203	! Description:
204	! ------------
205	!> This scheme keeps the prescribed net radiation constant during the run
206	!> Default zenith angle is 45 deg
207	!------------------------------------------------------------------------------!
208	SUBROUTINE photolysis_constant
209
210	IMPLICIT NONE
211
212	INTEGER(iwp) :: iphot,iav !< loop indix for photolysis reaction
213
214	DO iphot = 1,nphot
215	DO iav = 1,nconst
216	IF ( TRIM( names_c(iav) ) == TRIM( phot_names(iphot) ) ) then
217	!-- Prescribe fixed photolysis frequencies [1/s]
218	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = &
219	phot0(iav) * cosz
220	ENDIF
221	ENDDO
222	ENDDO
223
224	END SUBROUTINE photolysis_constant
225
226
227	!------------------------------------------------------------------------------!
228	! Description:
229	! ------------
230	!> This scheme applies a simple parameterisation for clear sky photolysis frequencies
231	!> from the Master Chemical Mechanism, MCM v3.2 (http://mcm.leeds.ac.uk/MCM).
232	!> Reference: Saunders et al., Atmos. Chem. Phys., 3, 161, 2003
233	!------------------------------------------------------------------------------!
234	SUBROUTINE photolysis_simple
235
236	USE radiation_model_mod, &
237	ONLY: calc_zenith, zenith
238
239	IMPLICIT NONE
240
241	INTEGER(iwp) :: iphot,iav !< loop indix for photolysis reaction
242	REAL(wp) :: coszi !< 1./cosine of zenith angle
243
244	DO iphot = 1,nphot
245	phot_frequen(iphot)%freq = 0.0_wp
246	ENDDO
247
248	CALL calc_zenith
249
250	IF ( zenith(0) > 0.0_wp ) THEN
251	coszi = 1. / zenith(0)
252
253	DO iphot = 1,nphot
254	DO iav = 1,nsimple
255	IF ( TRIM( names_s(iav) ) == TRIM( phot_names(iphot) ) ) then
256	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = &
257	par_l(iav) * zenith(0)*par_m(iav) EXP( -par_n(iav) * coszi )
258	ENDIF
259	ENDDO
260	ENDDO
261	ENDIF
262	END SUBROUTINE photolysis_simple
263
264	END MODULE chem_photolysis_mod

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