Home

Context Navigation

source: palm/trunk/SOURCE/chem_photolysis_mod.f90 @ 4380

Last change on this file since 4380 was 4227, checked in by gronemeier, 5 years ago
implement new palm_date_time_mod; replaced namelist parameters time_utc_init and day_of_year_init by origin_date_time
Property svn:keywords set to `Id`
File size: 10.4 KB

Line
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 4227 2019-09-10 18:04:34Z monakurppa $
28	! Change call to calc_zenith
29	!
30	! 4223 2019-09-10 09:20:47Z gronemeier
31	! Corrected "Former revisions" section
32	!
33	! 3876 2019-04-08 18:41:49Z knoop
34	! some formatting and comments added
35	!
36	! 3824 2019-03-27 15:56:16Z pavelkrc
37	! unused variables removed
38	!
39	! 2718 2018-01-02 08:49:38Z maronga
40	! Initial revision
41	!
42	!
43	! Authors:
44	! --------
45	! @author Renate Forkel
46	!
47	!------------------------------------------------------------------------------!
48	! Description:
49	! ------------
50	!> photolysis models and interfaces (Adapted from photolysis_model_mod.f90)
51	!> @todo more complex scheme, add shading
52	!------------------------------------------------------------------------------!
53	MODULE chem_photolysis_mod
54
55	! USE arrays_3d, &
56	! ONLY: dzw, q, ql, zu, zw
57
58	USE control_parameters, &
59	ONLY: time_since_reference_point
60
61	USE pegrid, &
62	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 chem_modules, &
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 degrees 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	!-- Parameters for simple photolysis frequencies from MCM (http://mcm.leeds.ac.uk/MCM)
112	!-- Saunders et al., 2003, Atmos. Chem. Phys., 3, 161-180
113	INTEGER,PARAMETER :: nsimple = 15 !< available predefined photolysis prequencies for simple 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	!-- Species dependent parameters for simple photolysis frequencies from MCM (http://mcm.leeds.ac.uk/MCM)
121	!-- J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
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) :: cosz = 0.7_wp !< cosine of fixed zenith angle (45 deg, if not specified otherwise)
139
140	!
141	INTERFACE photolysis_constant
142	MODULE PROCEDURE photolysis_constant
143	END INTERFACE photolysis_constant
144
145	INTERFACE photolysis_simple
146	MODULE PROCEDURE photolysis_simple
147	END INTERFACE photolysis_simple
148	!
149	! INTERFACE photolysis_fastj
150	! MODULE PROCEDURE photolysis_fastj
151	! END INTERFACE photolysis_fastj
152	!
153	INTERFACE photolysis_control
154	MODULE PROCEDURE photolysis_control
155	END INTERFACE photolysis_control
156
157	SAVE
158
159	PRIVATE
160
161	PUBLIC photolysis_control
162
163	PUBLIC photolysis_scheme
164
165	CONTAINS
166
167
168	!------------------------------------------------------------------------------!
169	! Description:
170	! ------------
171	!> This subroutine controls the calls of the photolysis schemes
172	!------------------------------------------------------------------------------!
173	SUBROUTINE photolysis_control
174
175	IMPLICIT NONE
176
177	SELECT CASE ( TRIM( photolysis_scheme ) )
178
179	CASE ( 'constant' )
180	CALL photolysis_constant
181
182	CASE ( 'simple' )
183	CALL photolysis_simple
184
185	! CASE ( 'fastj' )
186	! CALL photolysis_fastj
187
188	CASE DEFAULT
189
190	END SELECT
191
192
193	END SUBROUTINE photolysis_control
194
195
196	!------------------------------------------------------------------------------!
197	! Description:
198	! ------------
199	!> This scheme keeps the prescribed net radiation constant during the run
200	!> Default zenith angle is 45 deg
201	!------------------------------------------------------------------------------!
202	SUBROUTINE photolysis_constant
203
204	IMPLICIT NONE
205
206	INTEGER(iwp) :: iphot,iav !< loop indix for photolysis reaction
207
208	DO iphot = 1, nphot
209	DO iav = 1, nconst
210	IF ( TRIM( names_c(iav) ) == TRIM( phot_names(iphot) ) ) THEN
211	!-- Prescribe fixed photolysis frequencies [1/s]
212	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = &
213	phot0(iav) * cosz
214	ENDIF
215	ENDDO
216	ENDDO
217
218
219	END SUBROUTINE photolysis_constant
220
221
222	!------------------------------------------------------------------------------!
223	! Description:
224	! ------------
225	!> This scheme applies a simple parameterisation for clear sky photolysis frequencies
226	!> from the Master Chemical Mechanism, MCM v3.2 (http://mcm.leeds.ac.uk/MCM).
227	!> Reference: Saunders et al., Atmos. Chem. Phys., 3, 161, 2003
228	!> J = lCOSx@mEXP(-n*SECx) with l,m,n named par_l etc., x is the zenith angle
229	!------------------------------------------------------------------------------!
230	SUBROUTINE photolysis_simple
231
232	USE palm_date_time_mod, &
233	ONLY: get_date_time
234
235	USE radiation_model_mod, &
236	ONLY: calc_zenith, cos_zenith
237
238	IMPLICIT NONE
239
240	INTEGER(iwp) :: day_of_year !< day of the year
241	INTEGER(iwp) :: iav !< loop indix for photolysis reaction
242	INTEGER(iwp) :: iphot !< loop indix for photolysis reaction
243
244	REAL(wp) :: coszi !< 1./cosine of zenith angle
245	REAL(wp) :: second_of_day !< second of the day
246
247	DO iphot = 1, nphot
248	phot_frequen(iphot)%freq = 0.0_wp
249	ENDDO
250
251	CALL get_date_time( time_since_reference_point, &
252	day_of_year=day_of_year, second_of_day=second_of_day )
253	CALL calc_zenith( day_of_year, second_of_day )
254
255	IF ( cos_zenith > 0.0_wp ) THEN
256	coszi = 1. / cos_zenith
257
258	DO iphot = 1, nphot
259	DO iav = 1, nsimple
260	IF ( TRIM( names_s(iav) ) == TRIM( phot_names(iphot) ) ) then
261	phot_frequen(iphot)%freq(nzb+1:nzt,:,:) = &
262	par_l(iav) * cos_zenith*par_m(iav) EXP( -par_n(iav) * coszi )
263	ENDIF
264	ENDDO
265	ENDDO
266	ENDIF
267
268
269	END SUBROUTINE photolysis_simple
270
271	END MODULE chem_photolysis_mod

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

| Impressum | ©Leibniz Universität Hannover |