source: palm/trunk/SOURCE/chem_photolysis_mod.f90 @ 4281

Last change on this file since 4281 was 4227, checked in by gronemeier, 20 months ago

implement new palm_date_time_mod; replaced namelist parameters time_utc_init and day_of_year_init by origin_date_time

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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 4227 2019-09-10 18:04:34Z schwenkel $
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 = l*COSx@m*EXP(-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 = l*COSx@m*EXP(-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
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