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radiation_ifs_rrtm.F90

Last change on this file was 4489, checked in by lguez, 20 months ago
Merge LMDZ_ECRad branch back into trunk!
File size: 35.8 KB

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1	! radiation_ifs_rrtm.F90 - Interface to IFS implementation of RRTM-G
2	!
3	! (C) Copyright 2015- ECMWF.
4	!
5	! This software is licensed under the terms of the Apache Licence Version 2.0
6	! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
7	!
8	! In applying this licence, ECMWF does not waive the privileges and immunities
9	! granted to it by virtue of its status as an intergovernmental organisation
10	! nor does it submit to any jurisdiction.
11	!
12	! Author: Robin Hogan
13	! Email: r.j.hogan@ecmwf.int
14	!
15	! Modifications
16	! 2017-04-11 R. Hogan Receive "surface" dummy argument
17	! 2017-09-08 R. Hogan Reverted some changes
18	! 2017-10-18 R. Hogan Added planck_function public function
19	! 2018-01-11 R. Hogan Added optional spectral scaling of incoming solar radiation
20	! 2018-02-22 R. Hogan Optimized reverse indexing of heights
21	! 2018-05-05 R. Hogan gas_optics can be called for reduced number of levels
22	! 2019-01-02 R. Hogan Initialize shortwave props to zero in case sun below horizon
23
24	module radiation_ifs_rrtm
25
26	implicit none
27
28	public :: setup_gas_optics, gas_optics, planck_function, set_gas_units
29
30	contains
31
32	!---------------------------------------------------------------------
33	! Setup the IFS implementation of RRTM-G gas absorption model
34	subroutine setup_gas_optics(config, directory)
35
36	use yoerrtm, only : jpglw
37	use yoesrtm, only : jpgsw
38	use yoerrtftr, only : ngb_lw => ngb
39	use yoesrtm, only : ngb_sw => ngbsw
40	use yomhook, only : lhook, dr_hook
41
42	use radiation_config
43
44	type(config_type), intent(inout), target :: config
45	character(len=*), intent(in) :: directory
46
47	integer :: irep ! For implied do
48
49	integer, parameter :: RRTM_GPOINT_REORDERING_LW(140) = (/ &
50	& 89, 90, 139, 77, 137, 69, 131, 97, 91, 70, 78, 71, 53, 72, 123, 54, 79, 98, &
51	& 92, 55, 80, 132, 124, 81, 73, 56, 99, 82, 57, 23, 125, 100, 24, 74, 93, 58, 25, &
52	& 83, 126, 75, 26, 11, 101, 133, 59, 27, 76, 140, 12, 84, 102, 94, 28, 127, 85, &
53	& 13, 39, 60, 86, 103, 87, 109, 14, 29, 115, 40, 95, 15, 61, 88, 41, 110, 104, 1, &
54	& 116, 42, 30, 134, 128, 138, 96, 62, 16, 43, 117, 63, 111, 44, 2, 64, 31, 65, &
55	& 105, 17, 45, 66, 118, 32, 3, 33, 67, 18, 129, 135, 46, 112, 34, 106, 68, 35, 4, &
56	& 119, 36, 47, 107, 19, 37, 38, 113, 48, 130, 5, 120, 49, 108, 20, 50, 51, 114, &
57	& 21, 121, 52, 136, 122, 6, 22, 7, 8, 9, 10 &
58	& /)
59	integer, parameter :: RRTM_GPOINT_REORDERING_SW(112) = (/ &
60	& 35, 45, 19, 27, 36, 57, 20, 46, 58, 21, 28, 67, 55, 68, 37, 1, 69, 22, 29, 59, &
61	& 78, 101, 79, 77, 70, 76, 47, 75, 30, 81, 60, 102, 80, 82, 23, 2, 83, 84, 85, &
62	& 86, 103, 61, 31, 87, 56, 38, 71, 48, 88, 3, 62, 89, 24, 7, 49, 32, 104, 72, 90, &
63	& 63, 39, 4, 8, 50, 91, 64, 40, 33, 25, 51, 95, 96, 73, 65, 9, 41, 97, 92, 105, &
64	& 52, 5, 98, 10, 42, 99, 100, 66, 11, 74, 34, 53, 26, 6, 106, 12, 43, 13, 54, 93, &
65	& 44, 107, 94, 14, 108, 15, 16, 109, 17, 18, 110, 111, 112 &
66	& /)
67
68	real(jprb) :: hook_handle
69
70	!#include "surdi.intfb.h"
71	#include "surrtab.intfb.h"
72	#include "surrtpk.intfb.h"
73	#include "surrtrf.intfb.h"
74	#include "rrtm_init_140gp.intfb.h"
75	#include "srtm_init.intfb.h"
76
77	if (lhook) call dr_hook('radiation_ifs_rrtm:setup_gas_optics',0,hook_handle)
78
79	! The IFS implementation of RRTMG uses many global variables. In
80	! the IFS these will have been set up already; otherwise set them
81	! up now.
82	if (config%do_setup_ifsrrtm) then
83	!call SURDI
84	call SURRTAB
85	call SURRTPK
86	call SURRTRF
87	call RRTM_INIT_140GP(directory)
88	call SRTM_INIT(directory)
89	end if
90
91	! Cloud and aerosol properties can only be defined per band
92	config%do_cloud_aerosol_per_sw_g_point = .false.
93	config%do_cloud_aerosol_per_lw_g_point = .false.
94
95	config%n_g_sw = jpgsw
96	config%n_g_lw = jpglw
97	config%n_bands_sw = 14
98	config%n_bands_lw = 16
99
100	! Wavenumber ranges of each band may be needed so that the user
101	! can compute UV and photosynthetically active radiation for a
102	! particular wavelength range
103	call config%gas_optics_sw%spectral_def%allocate_bands_only( &
104	& [2600.0_jprb, 3250.0_jprb, 4000.0_jprb, 4650.0_jprb, 5150.0_jprb, 6150.0_jprb, 7700.0_jprb, &
105	& 8050.0_jprb, 12850.0_jprb, 16000.0_jprb, 22650.0_jprb, 29000.0_jprb, 38000.0_jprb, 820.0_jprb], &
106	& [3250.0_jprb, 4000.0_jprb, 4650.0_jprb, 5150.0_jprb, 6150.0_jprb, 7700.0_jprb, 8050.0_jprb, &
107	& 12850.0_jprb, 16000.0_jprb, 22650.0_jprb, 29000.0_jprb, 38000.0_jprb, 50000.0_jprb, 2600.0_jprb])
108	call config%gas_optics_lw%spectral_def%allocate_bands_only( &
109	& [10.0_jprb, 350.0_jprb, 500.0_jprb, 630.0_jprb, 700.0_jprb, 820.0_jprb, 980.0_jprb, 1080.0_jprb, &
110	& 1180.0_jprb, 1390.0_jprb, 1480.0_jprb, 1800.0_jprb, 2080.0_jprb, 2250.0_jprb, 2380.0_jprb, 2600.0_jprb], &
111	& [350.0_jprb, 500.0_jprb, 630.0_jprb, 700.0_jprb, 820.0_jprb, 980.0_jprb, 1080.0_jprb, 1180.0_jprb, &
112	& 1390.0_jprb, 1480.0_jprb, 1800.0_jprb, 2080.0_jprb, 2250.0_jprb, 2380.0_jprb, 2600.0_jprb, 3250.0_jprb])
113
114	allocate(config%i_band_from_g_sw (config%n_g_sw))
115	allocate(config%i_band_from_g_lw (config%n_g_lw))
116	allocate(config%i_band_from_reordered_g_sw(config%n_g_sw))
117	allocate(config%i_band_from_reordered_g_lw(config%n_g_lw))
118	allocate(config%i_g_from_reordered_g_sw(config%n_g_sw))
119	allocate(config%i_g_from_reordered_g_lw(config%n_g_lw))
120
121	! Shortwave starts at 16: need to start at 1
122	config%i_band_from_g_sw = ngb_sw - ngb_sw(1)+1
123	config%i_band_from_g_lw = ngb_lw
124
125	if (config%i_solver_sw == ISolverSpartacus) then
126	! SPARTACUS requires g points ordered in approximately
127	! increasing order of optical depth
128	config%i_g_from_reordered_g_sw = RRTM_GPOINT_REORDERING_SW
129	else
130	! Implied-do for no reordering
131	! config%i_g_from_reordered_g_sw = RRTM_GPOINT_REORDERING_SW
132	config%i_g_from_reordered_g_sw = (/ (irep, irep=1,config%n_g_sw) /)
133	end if
134
135	if (config%i_solver_lw == ISolverSpartacus) then
136	! SPARTACUS requires g points ordered in approximately
137	! increasing order of optical depth
138	config%i_g_from_reordered_g_lw = RRTM_GPOINT_REORDERING_LW
139	else
140	! Implied-do for no reordering
141	config%i_g_from_reordered_g_lw = (/ (irep, irep=1,config%n_g_lw) /)
142	end if
143
144	config%i_band_from_reordered_g_sw &
145	= config%i_band_from_g_sw(config%i_g_from_reordered_g_sw)
146
147	config%i_band_from_reordered_g_lw &
148	= config%i_band_from_g_lw(config%i_g_from_reordered_g_lw)
149
150	! The i_spec_* variables are used solely for storing spectral
151	! data, and this can either be by band or by g-point
152	if (config%do_save_spectral_flux) then
153	if (config%do_save_gpoint_flux) then
154	config%n_spec_sw = config%n_g_sw
155	config%n_spec_lw = config%n_g_lw
156	config%i_spec_from_reordered_g_sw => config%i_g_from_reordered_g_sw
157	config%i_spec_from_reordered_g_lw => config%i_g_from_reordered_g_lw
158	else
159	config%n_spec_sw = config%n_bands_sw
160	config%n_spec_lw = config%n_bands_lw
161	config%i_spec_from_reordered_g_sw => config%i_band_from_reordered_g_sw
162	config%i_spec_from_reordered_g_lw => config%i_band_from_reordered_g_lw
163	end if
164	else
165	config%n_spec_sw = 0
166	config%n_spec_lw = 0
167	nullify(config%i_spec_from_reordered_g_sw)
168	nullify(config%i_spec_from_reordered_g_lw)
169	end if
170
171	if (lhook) call dr_hook('radiation_ifs_rrtm:setup_gas_optics',1,hook_handle)
172
173	end subroutine setup_gas_optics
174
175
176	!---------------------------------------------------------------------
177	! Scale gas mixing ratios according to required units
178	subroutine set_gas_units(gas)
179
180	use radiation_gas, only : gas_type, IMassMixingRatio
181	type(gas_type), intent(inout) :: gas
182
183	call gas%set_units(IMassMixingRatio)
184
185	end subroutine set_gas_units
186
187
188	!---------------------------------------------------------------------
189	! Compute gas optical depths, shortwave scattering, Planck function
190	! and incoming shortwave radiation at top-of-atmosphere
191	subroutine gas_optics(ncol,nlev,istartcol,iendcol, &
192	& config, single_level, thermodynamics, gas, &
193	& od_lw, od_sw, ssa_sw, lw_albedo, planck_hl, lw_emission, &
194	& incoming_sw)
195
196	use parkind1, only : jprb, jpim
197
198	USE PARRRTM , ONLY : JPBAND, JPXSEC, JPINPX
199	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
200	USE YOESRTM , ONLY : JPGPT_SW => JPGPT
201	!USE YOMDIMV , ONLY : YRDIMV
202	use yomhook , only : lhook, dr_hook
203
204	use radiation_config, only : config_type, ISolverSpartacus
205	use radiation_thermodynamics, only : thermodynamics_type
206	use radiation_single_level, only : single_level_type
207	use radiation_gas
208
209	integer, intent(in) :: ncol ! number of columns
210	integer, intent(in) :: nlev ! number of model levels
211	integer, intent(in) :: istartcol, iendcol ! range of columns to process
212	type(config_type), intent(in) :: config
213	type(single_level_type), intent(in) :: single_level
214	type(thermodynamics_type),intent(in) :: thermodynamics
215	type(gas_type), intent(in) :: gas
216
217	! Longwave albedo of the surface
218	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
219	& intent(in), optional :: lw_albedo
220
221	! Gaseous layer optical depth in longwave and shortwave, and
222	! shortwave single scattering albedo (i.e. fraction of extinction
223	! due to Rayleigh scattering) at each g-point
224	real(jprb), dimension(config%n_g_lw,nlev,istartcol:iendcol), intent(out) :: &
225	& od_lw
226	real(jprb), dimension(config%n_g_sw,nlev,istartcol:iendcol), intent(out) :: &
227	& od_sw, ssa_sw
228
229	! The Planck function (emitted flux from a black body) at half
230	! levels at each longwave g-point
231	real(jprb), dimension(config%n_g_lw,nlev+1,istartcol:iendcol), &
232	& intent(out), optional :: planck_hl
233	! Planck function for the surface (W m-2)
234	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
235	& intent(out), optional :: lw_emission
236
237	! The incoming shortwave flux into a plane perpendicular to the
238	! incoming radiation at top-of-atmosphere in each of the shortwave
239	! g-points
240	real(jprb), dimension(config%n_g_sw,istartcol:iendcol), &
241	& intent(out), optional :: incoming_sw
242
243	real(jprb) :: incoming_sw_scale(istartcol:iendcol)
244
245	! The variables in capitals are used in the same way as the
246	! equivalent routine in the IFS
247
248	real(jprb) :: ZOD_LW(JPGPT_LW,nlev,istartcol:iendcol) ! Note ordering of dimensions
249	real(jprb) :: ZOD_SW(istartcol:iendcol,nlev,JPGPT_SW)
250	real(jprb) :: ZSSA_SW(istartcol:iendcol,nlev,JPGPT_SW)
251	real(jprb) :: ZINCSOL(istartcol:iendcol,JPGPT_SW)
252
253	real(jprb) :: ZCOLMOL(istartcol:iendcol,nlev)
254	real(jprb) :: ZCOLDRY(istartcol:iendcol,nlev)
255	real(jprb) :: ZWBRODL(istartcol:iendcol,nlev) !BROADENING GASES,column density (mol/cm2)
256	real(jprb) :: ZCOLBRD(istartcol:iendcol,nlev) !BROADENING GASES, column amount
257	real(jprb) :: ZWKL(istartcol:iendcol,JPINPX,nlev)
258
259	real(jprb) :: ZWX(istartcol:iendcol,JPXSEC,nlev) ! Amount of trace gases
260
261	real(jprb) :: ZFLUXFAC, ZPI
262
263	! - from AER
264	real(jprb) :: ZTAUAERL(istartcol:iendcol,nlev,JPBAND)
265
266	!- from INTFAC
267	real(jprb) :: ZFAC00(istartcol:iendcol,nlev)
268	real(jprb) :: ZFAC01(istartcol:iendcol,nlev)
269	real(jprb) :: ZFAC10(istartcol:iendcol,nlev)
270	real(jprb) :: ZFAC11(istartcol:iendcol,nlev)
271
272	!- from FOR
273	real(jprb) :: ZFORFAC(istartcol:iendcol,nlev)
274	real(jprb) :: ZFORFRAC(istartcol:iendcol,nlev)
275	integer :: INDFOR(istartcol:iendcol,nlev)
276
277	!- from MINOR
278	integer :: INDMINOR(istartcol:iendcol,nlev)
279	real(jprb) :: ZSCALEMINOR(istartcol:iendcol,nlev)
280	real(jprb) :: ZSCALEMINORN2(istartcol:iendcol,nlev)
281	real(jprb) :: ZMINORFRAC(istartcol:iendcol,nlev)
282
283	real(jprb) :: &
284	& ZRAT_H2OCO2(istartcol:iendcol,nlev),ZRAT_H2OCO2_1(istartcol:iendcol,nlev), &
285	& ZRAT_H2OO3(istartcol:iendcol,nlev) ,ZRAT_H2OO3_1(istartcol:iendcol,nlev), &
286	& ZRAT_H2ON2O(istartcol:iendcol,nlev),ZRAT_H2ON2O_1(istartcol:iendcol,nlev), &
287	& ZRAT_H2OCH4(istartcol:iendcol,nlev),ZRAT_H2OCH4_1(istartcol:iendcol,nlev), &
288	& ZRAT_N2OCO2(istartcol:iendcol,nlev),ZRAT_N2OCO2_1(istartcol:iendcol,nlev), &
289	& ZRAT_O3CO2(istartcol:iendcol,nlev) ,ZRAT_O3CO2_1(istartcol:iendcol,nlev)
290
291	!- from INTIND
292	integer :: JP(istartcol:iendcol,nlev)
293	integer :: JT(istartcol:iendcol,nlev)
294	integer :: JT1(istartcol:iendcol,nlev)
295
296	!- from PRECISE
297	real(jprb) :: ZONEMINUS, ZONEMINUS_ARRAY(istartcol:iendcol)
298
299	!- from PROFDATA
300	real(jprb) :: ZCOLH2O(istartcol:iendcol,nlev)
301	real(jprb) :: ZCOLCO2(istartcol:iendcol,nlev)
302	real(jprb) :: ZCOLO3(istartcol:iendcol,nlev)
303	real(jprb) :: ZCOLN2O(istartcol:iendcol,nlev)
304	real(jprb) :: ZCOLCH4(istartcol:iendcol,nlev)
305	real(jprb) :: ZCOLO2(istartcol:iendcol,nlev)
306	real(jprb) :: ZCO2MULT(istartcol:iendcol,nlev)
307	integer :: ILAYTROP(istartcol:iendcol)
308	integer :: ILAYSWTCH(istartcol:iendcol)
309	integer :: ILAYLOW(istartcol:iendcol)
310
311	!- from PROFILE
312	real(jprb) :: ZPAVEL(istartcol:iendcol,nlev)
313	real(jprb) :: ZTAVEL(istartcol:iendcol,nlev)
314	real(jprb) :: ZPZ(istartcol:iendcol,0:nlev)
315	real(jprb) :: ZTZ(istartcol:iendcol,0:nlev)
316
317	!- from SELF
318	real(jprb) :: ZSELFFAC(istartcol:iendcol,nlev)
319	real(jprb) :: ZSELFFRAC(istartcol:iendcol,nlev)
320	integer :: INDSELF(istartcol:iendcol,nlev)
321
322	!- from SP
323	real(jprb) :: ZPFRAC(istartcol:iendcol,JPGPT_LW,nlev)
324
325	!- from SURFACE
326	integer :: IREFLECT(istartcol:iendcol)
327
328	real(jprb) :: pressure_fl(ncol, nlev), temperature_fl(ncol, nlev)
329
330	! If nlev is less than the number of heights at which gas mixing
331	! ratios are stored, then we assume that the lower part of the
332	! atmosphere is required. This enables nlev=1 to be passed in to
333	! the routine, in which case the gas properties of the lowest
334	! layer are provided, useful for canopy radiative transfer.
335	integer :: istartlev, iendlev
336
337	integer :: jlev, jgreorder, jg, ig, iband, jcol
338
339	real(jprb) :: hook_handle
340
341	#include "rrtm_prepare_gases.intfb.h"
342	#include "rrtm_setcoef_140gp.intfb.h"
343	#include "rrtm_gas_optical_depth.intfb.h"
344	#include "srtm_setcoef.intfb.h"
345	#include "srtm_gas_optical_depth.intfb.h"
346
347	if (lhook) call dr_hook('radiation_ifs_rrtm:gas_optics',0,hook_handle)
348
349	! Compute start and end levels for indexing the gas mixing ratio
350	! and thermodynamics arrays
351	iendlev = ubound(gas%mixing_ratio,2)
352	istartlev = iendlev - nlev + 1
353
354	ZPI = 2.0_jprb*ASIN(1.0_jprb)
355	ZFLUXFAC = ZPI * 1.E+4
356	ZONEMINUS = 1.0_jprb - 1.0e-6_jprb
357	ZONEMINUS_ARRAY = ZONEMINUS
358
359	! if (.not. associated(YRDIMV)) then
360	! allocate(YRDIMV)
361	! YRDIMV%NFLEVG = nlev
362	! end if
363
364	do jlev=1,nlev
365	do jcol= istartcol,iendcol
366	pressure_fl(jcol,jlev) &
367	& = 0.5_jprb * (thermodynamics%pressure_hl(jcol,jlev+istartlev-1) &
368	& +thermodynamics%pressure_hl(jcol,jlev+istartlev))
369	temperature_fl(jcol,jlev) &
370	& = 0.5_jprb * (thermodynamics%temperature_hl(jcol,jlev+istartlev-1) &
371	& +thermodynamics%temperature_hl(jcol,jlev+istartlev))
372	end do
373	end do
374
375	! Check we have gas mixing ratios in the right units
376	call gas%assert_units(IMassMixingRatio)
377
378	! Warning: O2 is hard-coded within the following function so the
379	! user-provided concentrations of this gas are ignored for both
380	! the longwave and shortwave
381	CALL RRTM_PREPARE_GASES &
382	& ( istartcol, iendcol, ncol, nlev, &
383	& thermodynamics%pressure_hl(:,istartlev:iendlev+1), &
384	& pressure_fl, &
385	& thermodynamics%temperature_hl(:,istartlev:iendlev+1), &
386	& temperature_fl, &
387	& gas%mixing_ratio(:,istartlev:iendlev,IH2O), &
388	& gas%mixing_ratio(:,istartlev:iendlev,ICO2), &
389	& gas%mixing_ratio(:,istartlev:iendlev,ICH4), &
390	& gas%mixing_ratio(:,istartlev:iendlev,IN2O), &
391	& gas%mixing_ratio(:,istartlev:iendlev,INO2), &
392	& gas%mixing_ratio(:,istartlev:iendlev,ICFC11), &
393	& gas%mixing_ratio(:,istartlev:iendlev,ICFC12), &
394	& gas%mixing_ratio(:,istartlev:iendlev,IHCFC22), &
395	& gas%mixing_ratio(:,istartlev:iendlev,ICCl4), &
396	& gas%mixing_ratio(:,istartlev:iendlev,IO3), &
397	& ZCOLDRY, ZWBRODL,ZWKL, ZWX, &
398	& ZPAVEL , ZTAVEL , ZPZ , ZTZ, IREFLECT)
399
400	CALL RRTM_SETCOEF_140GP &
401	&( istartcol, iendcol, nlev , ZCOLDRY , ZWBRODL , ZWKL , &
402	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11 , ZFORFAC,ZFORFRAC,INDFOR, JP, JT, JT1 , &
403	& ZCOLH2O, ZCOLCO2 , ZCOLO3 , ZCOLN2O, ZCOLCH4, ZCOLO2,ZCO2MULT , ZCOLBRD, &
404	& ILAYTROP,ILAYSWTCH, ILAYLOW, ZPAVEL , ZTAVEL , ZSELFFAC, ZSELFFRAC, INDSELF, &
405	& INDMINOR,ZSCALEMINOR,ZSCALEMINORN2,ZMINORFRAC,&
406	& ZRAT_H2OCO2, ZRAT_H2OCO2_1, ZRAT_H2OO3, ZRAT_H2OO3_1, &
407	& ZRAT_H2ON2O, ZRAT_H2ON2O_1, ZRAT_H2OCH4, ZRAT_H2OCH4_1, &
408	& ZRAT_N2OCO2, ZRAT_N2OCO2_1, ZRAT_O3CO2, ZRAT_O3CO2_1)
409
410	ZTAUAERL(istartcol:iendcol,:,:) = 0.0_jprb
411
412	CALL RRTM_GAS_OPTICAL_DEPTH &
413	&( istartcol, iendcol, nlev, ZOD_LW, ZPAVEL, ZCOLDRY, ZCOLBRD, ZWX ,&
414	& ZTAUAERL, ZFAC00 , ZFAC01, ZFAC10 , ZFAC11 , ZFORFAC,ZFORFRAC,INDFOR, &
415	& JP, JT, JT1, ZONEMINUS ,&
416	& ZCOLH2O , ZCOLCO2, ZCOLO3, ZCOLN2O, ZCOLCH4, ZCOLO2,ZCO2MULT ,&
417	& ILAYTROP, ILAYSWTCH,ILAYLOW, ZSELFFAC, ZSELFFRAC, INDSELF, ZPFRAC, &
418	& INDMINOR,ZSCALEMINOR,ZSCALEMINORN2,ZMINORFRAC,&
419	& ZRAT_H2OCO2, ZRAT_H2OCO2_1, ZRAT_H2OO3, ZRAT_H2OO3_1, &
420	& ZRAT_H2ON2O, ZRAT_H2ON2O_1, ZRAT_H2OCH4, ZRAT_H2OCH4_1, &
421	& ZRAT_N2OCO2, ZRAT_N2OCO2_1, ZRAT_O3CO2, ZRAT_O3CO2_1)
422
423	if (present(lw_albedo)) then
424
425	call planck_function_atmos(nlev, istartcol, iendcol, config, &
426	& thermodynamics, ZPFRAC, planck_hl)
427
428	if (single_level%is_simple_surface) then
429	call planck_function_surf(istartcol, iendcol, config, &
430	& single_level%skin_temperature, ZPFRAC(:,:,1), &
431	& lw_emission)
432
433	! The following can be used to extract the parameters defined at
434	! the top of the planck_function routine below:
435	!write(*,'(a,140(e12.5,","),a)') 'ZPFRAC_surf=[', &
436	!& sum(ZPFRAC(istartcol:iendcol,:,1),1) / (iendcol+1-istartcol), ']'
437
438	! lw_emission at this point is actually the planck function of
439	! the surface
440	lw_emission = lw_emission * (1.0_jprb - lw_albedo)
441	else
442	! Longwave emission has already been computed
443	if (config%use_canopy_full_spectrum_lw) then
444	lw_emission = transpose(single_level%lw_emission(istartcol:iendcol,:))
445	else
446	lw_emission = transpose(single_level%lw_emission(istartcol:iendcol, &
447	& config%i_emiss_from_band_lw(config%i_band_from_reordered_g_lw)))
448	end if
449	end if
450
451	end if
452
453	if (config%i_solver_lw == ISolverSpartacus) then
454	! if (.true.) then
455	! We need to rearrange the gas optics info in memory: reordering
456	! the g points in order of approximately increasing optical
457	! depth (for efficient 3D processing on only the regions of the
458	! spectrum that are optically thin for gases) and reorder in
459	! pressure since the the functions above treat pressure
460	! decreasing with increasing index. Note that the output gas
461	! arrays have dimensions in a different order to the inputs,
462	! so there is some inefficiency here.
463	do jgreorder = 1,config%n_g_lw
464	iband = config%i_band_from_reordered_g_lw(jgreorder)
465	ig = config%i_g_from_reordered_g_lw(jgreorder)
466
467	! Top-of-atmosphere half level
468	do jlev = 1,nlev
469	do jcol = istartcol,iendcol
470	! Some g points can return negative optical depths;
471	! specifically original g points 54-56 which causes
472	! unphysical single-scattering albedo when combined with
473	! aerosol
474	od_lw(jgreorder,jlev,jcol) &
475	& = max(config%min_gas_od_lw, ZOD_LW(ig,nlev+1-jlev,jcol))
476	end do
477	end do
478	end do
479	else
480	! G points have not been reordered
481	do jcol = istartcol,iendcol
482	do jlev = 1,nlev
483	! Check for negative optical depth
484	od_lw(:,jlev,jcol) = max(config%min_gas_od_lw, ZOD_LW(:,nlev+1-jlev,jcol))
485	end do
486	end do
487	end if
488
489	CALL SRTM_SETCOEF &
490	& ( istartcol, iendcol, nlev,&
491	& ZPAVEL , ZTAVEL,&
492	& ZCOLDRY , ZWKL,&
493	& ILAYTROP,&
494	& ZCOLCH4 , ZCOLCO2 , ZCOLH2O , ZCOLMOL , ZCOLO2 , ZCOLO3,&
495	& ZFORFAC , ZFORFRAC , INDFOR , ZSELFFAC, ZSELFFRAC, INDSELF, &
496	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11,&
497	& JP , JT , JT1 , single_level%cos_sza(istartcol:iendcol) &
498	& )
499
500	! SRTM_GAS_OPTICAL_DEPTH will not initialize profiles when the sun
501	! is below the horizon, so we do it here
502	ZOD_SW(istartcol:iendcol,:,:) = 0.0_jprb
503	ZSSA_SW(istartcol:iendcol,:,:) = 0.0_jprb
504	ZINCSOL(istartcol:iendcol,:) = 0.0_jprb
505
506	CALL SRTM_GAS_OPTICAL_DEPTH &
507	&( istartcol, iendcol , nlev , ZONEMINUS_ARRAY,&
508	& single_level%cos_sza(istartcol:iendcol), ILAYTROP,&
509	& ZCOLCH4 , ZCOLCO2 , ZCOLH2O, ZCOLMOL , ZCOLO2 , ZCOLO3,&
510	& ZFORFAC , ZFORFRAC , INDFOR , ZSELFFAC, ZSELFFRAC, INDSELF,&
511	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11 ,&
512	& JP , JT , JT1 ,&
513	& ZOD_SW , ZSSA_SW , ZINCSOL )
514
515	! Scale the incoming solar per band, if requested
516	if (config%use_spectral_solar_scaling) then
517	do jg = 1,JPGPT_SW
518	do jcol = istartcol,iendcol
519	ZINCSOL(jcol,jg) = ZINCSOL(jcol,jg) * &
520	& single_level%spectral_solar_scaling(config%i_band_from_reordered_g_sw(jg))
521	end do
522	end do
523	end if
524
525	! Scaling factor to ensure that the total solar irradiance is as
526	! requested. Note that if the sun is below the horizon then
527	! ZINCSOL will be zero.
528	if (present(incoming_sw)) then
529	do jcol = istartcol,iendcol
530	if (single_level%cos_sza(jcol) > 0.0_jprb) then
531	! Added for DWD (2020)
532	!NEC$ nounroll
533	incoming_sw_scale(jcol) = single_level%solar_irradiance / sum(ZINCSOL(jcol,:))
534	else
535	incoming_sw_scale(jcol) = 1.0_jprb
536	end if
537	end do
538	end if
539
540	if (config%i_solver_sw == ISolverSpartacus) then
541	! if (.true.) then
542	! Account for reordered g points
543	do jgreorder = 1,config%n_g_sw
544	ig = config%i_g_from_reordered_g_sw(jgreorder)
545	do jlev = 1,nlev
546	do jcol = istartcol,iendcol
547	! Check for negative optical depth
548	od_sw (jgreorder,nlev+1-jlev,jcol) &
549	& = max(config%min_gas_od_sw, ZOD_SW (jcol,jlev,ig))
550	ssa_sw(jgreorder,nlev+1-jlev,jcol) = ZSSA_SW(jcol,jlev,ig)
551	end do
552	end do
553	if (present(incoming_sw)) then
554	incoming_sw(jgreorder,:) &
555	& = incoming_sw_scale(:) * ZINCSOL(:,ig)
556	end if
557	end do
558	else
559	! G points have not been reordered
560	do jcol = istartcol,iendcol
561	do jlev = 1,nlev
562	do jg = 1,config%n_g_sw
563	! Check for negative optical depth
564	od_sw (jg,nlev+1-jlev,jcol) = max(config%min_gas_od_sw, ZOD_SW(jcol,jlev,jg))
565	ssa_sw(jg,nlev+1-jlev,jcol) = ZSSA_SW(jcol,jlev,jg)
566	end do
567	end do
568	if (present(incoming_sw)) then
569	do jg = 1,config%n_g_sw
570	incoming_sw(jg,jcol) = incoming_sw_scale(jcol) * ZINCSOL(jcol,jg)
571	end do
572	end if
573	end do
574	end if
575
576	if (lhook) call dr_hook('radiation_ifs_rrtm:gas_optics',1,hook_handle)
577
578	end subroutine gas_optics
579
580
581	!---------------------------------------------------------------------
582	! Compute Planck function of the atmosphere
583	subroutine planck_function_atmos(nlev,istartcol,iendcol, &
584	config, thermodynamics, PFRAC, &
585	planck_hl)
586
587	use parkind1, only : jprb, jpim
588
589	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
590	use yoerrtwn, only : totplnk, delwave
591
592	use yomhook, only : lhook, dr_hook
593
594	use radiation_config, only : config_type, ISolverSpartacus
595	use radiation_thermodynamics, only : thermodynamics_type
596	!use radiation_gas
597
598	integer, intent(in) :: nlev ! number of model levels
599	integer, intent(in) :: istartcol, iendcol ! range of columns to process
600	type(config_type), intent(in) :: config
601	type(thermodynamics_type),intent(in) :: thermodynamics
602	real(jprb), intent(in) :: PFRAC(istartcol:iendcol,JPGPT_LW,nlev)
603
604	! The Planck function (emitted flux from a black body) at half
605	! levels at each longwave g-point
606	real(jprb), dimension(config%n_g_lw,nlev+1,istartcol:iendcol), intent(out) :: &
607	& planck_hl
608
609	! Planck function values per band
610	real(jprb), dimension(istartcol:iendcol, config%n_bands_lw) :: planck_store
611
612	! Look-up table variables for Planck function
613	real(jprb), dimension(istartcol:iendcol) :: frac
614	integer, dimension(istartcol:iendcol) :: ind
615
616	! Temperature (K) of a half-level
617	real(jprb) :: temperature
618
619	real(jprb) :: factor, planck_tmp(istartcol:iendcol,config%n_g_lw)
620	real(jprb) :: ZFLUXFAC
621
622	integer :: jlev, jgreorder, jg, ig, iband, jband, jcol, ilevoffset
623
624	real(jprb) :: hook_handle
625
626	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_atmos',0,hook_handle)
627
628	ZFLUXFAC = 2.0_jprbASIN(1.0_jprb) 1.0e4_jprb
629
630	! nlev may be less than the number of original levels, in which
631	! case we assume that the user wants the lower part of the
632	! atmosphere
633	ilevoffset = ubound(thermodynamics%temperature_hl,2)-nlev-1
634
635	! Work out interpolations: for each half level, the index of the
636	! lowest interpolation bound, and the fraction into interpolation
637	! interval
638	do jlev = 1,nlev+1
639	do jcol = istartcol,iendcol
640	temperature = thermodynamics%temperature_hl(jcol,jlev+ilevoffset)
641	if (temperature < 339.0_jprb .and. temperature >= 160.0_jprb) then
642	! Linear interpolation between -113 and 66 degC
643	ind(jcol) = int(temperature - 159.0_jprb)
644	frac(jcol) = temperature - int(temperature)
645	else if(temperature >= 339.0_jprb) then
646	! Extrapolation above 66 degC
647	ind(jcol) = 180
648	frac(jcol) = temperature - 339.0_jprb
649	else
650	! Cap below -113 degC (to avoid possible negative Planck
651	! function values)
652	ind(jcol) = 1
653	frac(jcol) = 0.0_jprb
654	end if
655	end do
656
657	! Calculate Planck functions per band
658	do jband = 1,config%n_bands_lw
659	factor = zfluxfac * delwave(jband)
660	do jcol = istartcol,iendcol
661	planck_store(jcol,jband) = factor &
662	& * (totplnk(ind(jcol),jband) &
663	& + frac(jcol)*(totplnk(ind(jcol)+1,jband)-totplnk(ind(jcol),jband)))
664	end do
665	end do
666
667	if (config%i_solver_lw == ISolverSpartacus) then
668	! We need to rearrange the gas optics info in memory:
669	! reordering the g points in order of approximately increasing
670	! optical depth (for efficient 3D processing on only the
671	! regions of the spectrum that are optically thin for gases)
672	! and reorder in pressure since the the functions above treat
673	! pressure decreasing with increasing index.
674	if (jlev == 1) then
675	! Top-of-atmosphere half level - note that PFRAC is on model
676	! levels not half levels
677	do jgreorder = 1,config%n_g_lw
678	iband = config%i_band_from_reordered_g_lw(jgreorder)
679	ig = config%i_g_from_reordered_g_lw(jgreorder)
680	planck_hl(jgreorder,1,:) = planck_store(:,iband) &
681	& * PFRAC(:,ig,nlev)
682	end do
683	else
684	do jgreorder = 1,config%n_g_lw
685	iband = config%i_band_from_reordered_g_lw(jgreorder)
686	ig = config%i_g_from_reordered_g_lw(jgreorder)
687	planck_hl(jgreorder,jlev,:) &
688	& = planck_store(:,iband) &
689	& * PFRAC(:,ig,nlev+2-jlev)
690	end do
691	end if
692	else
693	! G points have not been reordered
694	if (jlev == 1) then
695	! Top-of-atmosphere half level - note that PFRAC is on model
696	! levels not half levels
697	do jg = 1,config%n_g_lw
698	iband = config%i_band_from_g_lw(jg)
699	planck_hl(jg,1,:) = planck_store(:,iband) * PFRAC(:,jg,nlev)
700	end do
701	else
702	do jg = 1,config%n_g_lw
703	iband = config%i_band_from_g_lw(jg)
704	planck_tmp(:,jg) = planck_store(:,iband) * PFRAC(:,jg,nlev+2-jlev)
705	end do
706	do jcol = istartcol,iendcol
707	planck_hl(:,jlev,jcol) = planck_tmp(jcol,:)
708	end do
709	end if
710	end if
711	end do
712
713	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_atmos',1,hook_handle)
714
715	end subroutine planck_function_atmos
716
717
718	!---------------------------------------------------------------------
719	! Compute Planck function of the surface
720	subroutine planck_function_surf(istartcol, iendcol, config, temperature, PFRAC, &
721	& planck_surf)
722
723	use parkind1, only : jprb, jpim
724
725	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
726	use yoerrtwn, only : totplnk, delwave
727
728	use yomhook, only : lhook, dr_hook
729
730	use radiation_config, only : config_type, ISolverSpartacus
731	! use radiation_gas
732
733	integer, intent(in) :: istartcol, iendcol ! range of columns to process
734	type(config_type), intent(in) :: config
735	real(jprb), intent(in) :: temperature(:)
736
737	real(jprb), intent(in) :: PFRAC(istartcol:iendcol,JPGPT_LW)
738
739	! Planck function of the surface (W m-2)
740	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
741	& intent(out) :: planck_surf
742
743	! Planck function values per band
744	real(jprb), dimension(istartcol:iendcol, config%n_bands_lw) :: planck_store
745
746	! Look-up table variables for Planck function
747	real(jprb), dimension(istartcol:iendcol) :: frac
748	integer, dimension(istartcol:iendcol) :: ind
749
750	! Temperature (K)
751	real(jprb) :: Tsurf
752
753	real(jprb) :: factor
754	real(jprb) :: ZFLUXFAC
755
756	integer :: jgreorder, jg, ig, iband, jband, jcol
757
758	real(jprb) :: hook_handle
759
760	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_surf',0,hook_handle)
761
762	ZFLUXFAC = 2.0_jprbASIN(1.0_jprb) 1.0e4_jprb
763
764	! Work out surface interpolations
765	do jcol = istartcol,iendcol
766	Tsurf = temperature(jcol)
767	if (Tsurf < 339.0_jprb .and. Tsurf >= 160.0_jprb) then
768	! Linear interpolation between -113 and 66 degC
769	ind(jcol) = int(Tsurf - 159.0_jprb)
770	frac(jcol) = Tsurf - int(Tsurf)
771	else if(Tsurf >= 339.0_jprb) then
772	! Extrapolation above 66 degC
773	ind(jcol) = 180
774	frac(jcol) = Tsurf - 339.0_jprb
775	else
776	! Cap below -113 degC (to avoid possible negative Planck
777	! function values)
778	ind(jcol) = 1
779	frac(jcol) = 0.0_jprb
780	end if
781	end do
782
783	! Calculate Planck functions per band
784	do jband = 1,config%n_bands_lw
785	factor = zfluxfac * delwave(jband)
786	do jcol = istartcol,iendcol
787	planck_store(jcol,jband) = factor &
788	& * (totplnk(ind(jcol),jband) &
789	& + frac(jcol)*(totplnk(ind(jcol)+1,jband)-totplnk(ind(jcol),jband)))
790	end do
791	end do
792
793	if (config%i_solver_lw == ISolverSpartacus) then
794	! We need to rearrange the gas optics info in memory: reordering
795	! the g points in order of approximately increasing optical
796	! depth (for efficient 3D processing on only the regions of
797	! the spectrum that are optically thin for gases) and reorder
798	! in pressure since the the functions above treat pressure
799	! decreasing with increasing index.
800	do jgreorder = 1,config%n_g_lw
801	iband = config%i_band_from_reordered_g_lw(jgreorder)
802	ig = config%i_g_from_reordered_g_lw(jgreorder)
803	planck_surf(jgreorder,:) = planck_store(:,iband) * PFRAC(:,ig)
804	end do
805	else
806	! G points have not been reordered
807	do jg = 1,config%n_g_lw
808	iband = config%i_band_from_g_lw(jg)
809	planck_surf(jg,:) = planck_store(:,iband) * PFRAC(:,jg)
810	end do
811	end if
812
813	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_surf',1,hook_handle)
814
815	end subroutine planck_function_surf
816
817
818	!---------------------------------------------------------------------
819	! Externally facing function for computing the Planck function
820	! without reference to any gas profile; typically this would be used
821	! for computing the emission by facets of a complex surface. Note
822	! that this uses fixed "PFRAC" values, obtained by averaging over
823	! those derived from RRTM-G for near-surface conditions over a line
824	! of meridian from the ECMWF model.
825	subroutine planck_function(config, temperature, planck_surf)
826
827	use parkind1, only : jprb, jpim
828
829	use radiation_config, only : config_type
830
831	type(config_type), intent(in) :: config
832	real(jprb), intent(in) :: temperature
833
834	! Planck function of the surface (W m-2)
835	real(jprb), dimension(config%n_g_lw), &
836	& intent(out) :: planck_surf
837
838	! Fraction of each band contributed by each g-point within
839	! it. Since there are 16 bands, this array sums to 16
840	real(jprb), parameter, dimension(1,140) :: frac &
841	= reshape( (/ 0.21227E+00, 0.18897E+00, 0.25491E+00, 0.17864E+00, 0.11735E+00, 0.38298E-01, 0.57871E-02, &
842	& 0.31753E-02, 0.53169E-03, 0.76476E-04, 0.16388E+00, 0.15241E+00, 0.14290E+00, 0.12864E+00, &
843	& 0.11615E+00, 0.10047E+00, 0.80013E-01, 0.60445E-01, 0.44918E-01, 0.63395E-02, 0.32942E-02, &
844	& 0.54541E-03, 0.15380E+00, 0.15194E+00, 0.14339E+00, 0.13138E+00, 0.11701E+00, 0.10081E+00, &
845	& 0.82296E-01, 0.61735E-01, 0.41918E-01, 0.45918E-02, 0.37743E-02, 0.30121E-02, 0.22500E-02, &
846	& 0.14490E-02, 0.55410E-03, 0.78364E-04, 0.15938E+00, 0.15146E+00, 0.14213E+00, 0.13079E+00, &
847	& 0.11672E+00, 0.10053E+00, 0.81566E-01, 0.61126E-01, 0.41150E-01, 0.44488E-02, 0.36950E-02, &
848	& 0.29101E-02, 0.21357E-02, 0.19609E-02, 0.14134E+00, 0.14390E+00, 0.13913E+00, 0.13246E+00, &
849	& 0.12185E+00, 0.10596E+00, 0.87518E-01, 0.66164E-01, 0.44862E-01, 0.49402E-02, 0.40857E-02, &
850	& 0.32288E-02, 0.23613E-02, 0.15406E-02, 0.58258E-03, 0.82171E-04, 0.29127E+00, 0.28252E+00, &
851	& 0.22590E+00, 0.14314E+00, 0.45494E-01, 0.71792E-02, 0.38483E-02, 0.65712E-03, 0.29810E+00, &
852	& 0.27559E+00, 0.11997E+00, 0.10351E+00, 0.84515E-01, 0.62253E-01, 0.41050E-01, 0.44217E-02, &
853	& 0.36946E-02, 0.29113E-02, 0.34290E-02, 0.55993E-03, 0.31441E+00, 0.27586E+00, 0.21297E+00, &
854	& 0.14064E+00, 0.45588E-01, 0.65665E-02, 0.34232E-02, 0.53199E-03, 0.19811E+00, 0.16833E+00, &
855	& 0.13536E+00, 0.11549E+00, 0.10649E+00, 0.93264E-01, 0.75720E-01, 0.56405E-01, 0.41865E-01, &
856	& 0.59331E-02, 0.26510E-02, 0.40040E-03, 0.32328E+00, 0.26636E+00, 0.21397E+00, 0.14038E+00, &
857	& 0.52142E-01, 0.38852E-02, 0.14601E+00, 0.13824E+00, 0.27703E+00, 0.22388E+00, 0.15446E+00, &
858	& 0.48687E-01, 0.98054E-02, 0.18870E-02, 0.11961E+00, 0.12106E+00, 0.13215E+00, 0.13516E+00, &
859	& 0.25249E+00, 0.16542E+00, 0.68157E-01, 0.59725E-02, 0.49258E+00, 0.33651E+00, 0.16182E+00, &
860	& 0.90984E-02, 0.95202E+00, 0.47978E-01, 0.91716E+00, 0.82857E-01, 0.77464E+00, 0.22536E+00 /), (/ 1,140 /) )
861
862	call planck_function_surf(1, 1, config, spread(temperature,1,1), &
863	& frac, planck_surf)
864
865	end subroutine planck_function
866
867	end module radiation_ifs_rrtm

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