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chem_photolysis_mod.f90 @ 4893

Last change on this file since 4893 was 4881, checked in by forkel, 4 years ago
removed unused parameters and write statements in chemistry
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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 2018-2021 Leibniz Universitaet Hannover
17	! Copyright 2018-2021 Karlsruhe Institute of Technology
18	!--------------------------------------------------------------------------------------------------!
19	!
20	! Current revisions:
21	! -----------------
22	!
23	!
24	! Former revisions:
25	! -----------------
26	! $Id: chem_photolysis_mod.f90 4881 2021-02-19 22:05:08Z raasch $
27	! removed chem_debug parameter
28	!
29	!
30	! 4828 2021-01-05 11:21:41Z Giersch
31	! further re-formatting to follow the PALM coding standard
32	!
33	! 4559 2020-06-11 08:51:48Z raasch
34	! file re-formatted to follow the PALM coding standard
35	!
36	! 4481 2020-03-31 18:55:54Z maronga
37	! Change call to calc_zenith
38	!
39	! 4223 2019-09-10 09:20:47Z gronemeier
40	! Corrected "Former revisions" section
41	!
42	! 3876 2019-04-08 18:41:49Z knoop
43	! some formatting and comments added
44	!
45	! 3824 2019-03-27 15:56:16Z pavelkrc
46	! unused variables removed
47	!
48	! 2718 2018-01-02 08:49:38Z maronga
49	! Initial revision
50	!
51	!
52	! Authors:
53	! --------
54	! @author Renate Forkel
55	!
56	!--------------------------------------------------------------------------------------------------!
57	! Description:
58	! ------------
59	!> photolysis models and interfaces (Adapted from photolysis_model_mod.f90)
60	!> @todo more complex scheme, add shading
61	!--------------------------------------------------------------------------------------------------!
62	MODULE chem_photolysis_mod
63
64	! USE arrays_3d, &
65	! ONLY: dzw, q, ql, zu, zw
66
67	USE control_parameters, &
68	ONLY: time_since_reference_point
69
70	USE pegrid, &
71	ONLY: myid, threads_per_task
72
73	USE indices, &
74	ONLY: nxl, nxlg, nxr, nxrg, nyn, nyng, nys, nysg, nzb, nzt
75
76	USE control_parameters, &
77	ONLY: initializing_actions
78
79	USE chem_gasphase_mod, &
80	ONLY: nphot, phot, phot_names
81
82	USE chem_modules, &
83	ONLY: phot_frequen, photolysis_scheme
84
85	USE kinds
86
87	#if defined ( __netcdf )
88	USE NETCDF
89	#endif
90
91
92	IMPLICIT NONE
93
94
95	! LOGICAL :: unscheduled_photolysis_calls = .TRUE., & !< flag parameter indicating whether additional calls of the photolysis
96	! !< code are allowed
97	! constant_albedo = .FALSE., & !< flag parameter indicating whether the albedo may change depending on
98	! !< zenith
99	! force_photolysis_call = .FALSE., & !< flag parameter for unscheduled photolysis calls
100	! photolysis = .FALSE., & !< flag parameter indicating whether the photolysis model is used
101	! sun_up = .TRUE., & !< flag parameter indicating whether the sun is up or down
102	! photolysis = .TRUE., & !< flag parameter indicing whether photolysis shall be calculated
103	! sun_direction = .FALSE. !< flag parameter indicing whether solar direction shall be calculated
104
105	!
106	!-- Parameters for constant photolysis frequencies
107	INTEGER,PARAMETER :: nconst = 15 !< available predefined photolysis prequencies for constant
108	!
109	!-- Names for predefined fixed photolysis frequencies at zenith angle 0
110	CHARACTER(LEN=10), PARAMETER, DIMENSION(nconst) :: names_c = (/ &
111	'J_O31D ','J_O33P ','J_NO2 ','J_HNO3 ','J_RCHO ', &
112	'J ','J ','J ','J ','J ', &
113	'J ','J ','J ','J ','J ' /)
114	!
115	!-- Photolysis frequency at zenith angle 0 degrees in 1/s
116	REAL(wp), PARAMETER, DIMENSION(nconst) :: phot0 = (/ &
117	2.489E-05_wp, 3.556E-04_wp, 8.89E-03_wp,5.334E-07_wp, 3.734E-05_wp, &
118	0.0000E00_wp, 0.0000E00_wp, 0.0000E00_wp,0.0000E00_wp, 0.0000E00_wp, &
119	0.0000E00_wp, 0.0000E00_wp, 0.0000E00_wp,0.0000E00_wp, 0.0000E00_wp /)
120	!
121	!-- Parameters for simple photolysis frequencies from MCM (http://mcm.leeds.ac.uk/MCM)
122	!-- Saunders et al., 2003, Atmos. Chem. Phys., 3, 161-180
123	INTEGER,PARAMETER :: nsimple = 15 !< available predefined photolysis prequencies for simple parameterisation
124	!
125	!-- Names for simple photolysis frequencies parameterisation (
126	CHARACTER(LEN=10), PARAMETER, DIMENSION(nsimple) :: names_s = (/ &
127	'J_O31D ','J_O33P ','J_H2O2 ','J_NO2 ','J_NO3_A ', &
128	'J_NO3_B ','J_HONO ','J_HNO3 ','J_HCHO_A ','J_HCHO_B ', &
129	'J_CH3CHO ','J ','J ','J ','J_RCHO ' /)
130	!
131	!-- Species dependent parameters for simple photolysis frequencies from MCM
132	!-- (http://mcm.leeds.ac.uk/MCM)
133	!-- J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
134	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_l = (/ &
135	6.073E-05_wp, 4.775E-04_wp, 1.041E-05_wp, 1.165E-02_wp, 2.485E-02_wp, &
136	1.747E-01_wp, 2.644E-03_wp, 9.312E-07_wp, 4.642E-05_wp, 6.853E-05_wp, &
137	7.344E-06_wp, 0.0000E00_wp, 0.0000E00_wp, 0.000E00_wp, 6.853E-05_wp /)
138
139	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_m = (/ &
140	1.743_wp, 0.298_wp, 0.723_wp, 0.244_wp, 0.168_wp, &
141	0.155_wp, 0.261_wp, 1.230_wp, 0.762_wp, 0.477_wp, &
142	1.202_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.477_wp /)
143
144	REAL(wp), PARAMETER, DIMENSION(nconst) :: par_n = (/ &
145	0.474_wp, 0.080_wp, 0.279_wp, 0.267_wp, 0.108_wp, &
146	0.125_wp, 0.288_wp, 0.307_wp, 0.353_wp, 0.323_wp, &
147	0.417_wp, 0.000_wp, 0.000_wp, 0.000_wp, 0.323_wp /)
148
149
150	REAL(wp) :: cosz = 0.7_wp !< cosine of fixed zenith angle (45 deg, if not
151	!< specified otherwise)
152
153
154	INTERFACE photolysis_constant
155	MODULE PROCEDURE photolysis_constant
156	END INTERFACE photolysis_constant
157
158	INTERFACE photolysis_simple
159	MODULE PROCEDURE photolysis_simple
160	END INTERFACE photolysis_simple
161	!
162	! INTERFACE photolysis_fastj
163	! MODULE PROCEDURE photolysis_fastj
164	! END INTERFACE photolysis_fastj
165	!
166	INTERFACE photolysis_control
167	MODULE PROCEDURE photolysis_control
168	END INTERFACE photolysis_control
169
170	SAVE
171
172	PRIVATE
173
174	PUBLIC photolysis_control
175
176	PUBLIC photolysis_scheme
177
178	CONTAINS
179
180
181	!--------------------------------------------------------------------------------------------------!
182	! Description:
183	! ------------
184	!> This subroutine controls the calls of the photolysis schemes.
185	!--------------------------------------------------------------------------------------------------!
186	SUBROUTINE photolysis_control
187
188	IMPLICIT NONE
189
190	SELECT CASE ( TRIM( photolysis_scheme ) )
191
192	CASE ( 'constant' )
193	CALL photolysis_constant
194
195	CASE ( 'simple' )
196	CALL photolysis_simple
197
198	! CASE ( 'fastj' )
199	! CALL photolysis_fastj
200
201	CASE DEFAULT
202
203	END SELECT
204
205
206	END SUBROUTINE photolysis_control
207
208
209	!--------------------------------------------------------------------------------------------------!
210	! Description:
211	! ------------
212	!> This scheme keeps the prescribed net radiation constant during the run.
213	!> Default zenith angle is 45 deg
214	!--------------------------------------------------------------------------------------------------!
215	SUBROUTINE photolysis_constant
216
217	IMPLICIT NONE
218
219	INTEGER(iwp) :: iphot,iav !< loop index for photolysis reaction
220
221	DO iphot = 1, nphot
222	DO iav = 1, nconst
223	IF ( TRIM( names_c(iav) ) == TRIM( phot_names(iphot) ) ) THEN
224	!-- Prescribe fixed photolysis frequencies [1/s]
225	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = phot0(iav) * cosz
226	ENDIF
227	ENDDO
228	ENDDO
229
230
231	END SUBROUTINE photolysis_constant
232
233
234	!--------------------------------------------------------------------------------------------------!
235	! Description:
236	! ------------
237	!> This scheme applies a simple parameterisation for clear sky photolysis frequencies from the
238	!> Master Chemical Mechanism, MCM v3.2 (http://mcm.leeds.ac.uk/MCM).
239	!> Reference: Saunders et al., Atmos. Chem. Phys., 3, 161, 2003
240	!> J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
241	!--------------------------------------------------------------------------------------------------!
242	SUBROUTINE photolysis_simple
243
244	USE palm_date_time_mod, &
245	ONLY: get_date_time
246
247	USE radiation_model_mod, &
248	ONLY: calc_zenith, cos_zenith
249
250	IMPLICIT NONE
251
252	INTEGER(iwp) :: day_of_year !< day of the year
253	INTEGER(iwp) :: iav !< loop indix for photolysis reaction
254	INTEGER(iwp) :: iphot !< loop indix for photolysis reaction
255
256	REAL(wp) :: coszi !< 1./cosine of zenith angle
257	REAL(wp) :: second_of_day !< second of the day
258
259	DO iphot = 1, nphot
260	phot_frequen(iphot)%freq = 0.0_wp
261	ENDDO
262
263	CALL get_date_time( time_since_reference_point, day_of_year = day_of_year, &
264	second_of_day=second_of_day )
265	CALL calc_zenith( day_of_year, second_of_day )
266
267	IF ( cos_zenith > 0.0_wp ) THEN
268	coszi = 1.0_wp / cos_zenith
269
270	DO iphot = 1, nphot
271	DO iav = 1, nsimple
272	IF ( TRIM( names_s(iav) ) == TRIM( phot_names(iphot) ) ) THEN
273	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = par_l(iav) * cos_zenith*par_m(iav) &
274	EXP( - par_n(iav) * coszi )
275	ENDIF
276	ENDDO
277	ENDDO
278	ENDIF
279
280
281	END SUBROUTINE photolysis_simple
282
283	END MODULE chem_photolysis_mod

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