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radiation_ifs_rrtm.F90 @ 5185

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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	config%n_g_sw = jpgsw
92	config%n_g_lw = jpglw
93	config%n_bands_sw = 14
94	config%n_bands_lw = 16
95
96	! Wavenumber ranges of each band may be needed so that the user
97	! can compute UV and photosynthetically active radiation for a
98	! particular wavelength range
99	allocate(config%wavenumber1_sw(config%n_bands_sw))
100	allocate(config%wavenumber2_sw(config%n_bands_sw))
101	allocate(config%wavenumber1_lw(config%n_bands_lw))
102	allocate(config%wavenumber2_lw(config%n_bands_lw))
103	config%wavenumber1_lw = (/ 10, 350, 500, 630, 700, 820, 980, 1080, 1180, 1390, 1480, &
104	& 1800, 2080, 2250, 2380, 2600 /)
105	config%wavenumber2_lw = (/ 350, 500, 630, 700, 820, 980, 1080, 1180, 1390, 1480, 1800, &
106	& 2080, 2250, 2380, 2600, 3250 /)
107	config%wavenumber1_sw = (/ 2600, 3250, 4000, 4650, 5150, 6150, 7700, 8050, 12850, &
108	& 16000 , 22650, 29000, 38000, 820 /)
109	config%wavenumber2_sw = (/ 3250, 4000, 4650, 5150, 6150, 7700, 8050, 12850, 16000, &
110	& 22650, 29000, 38000, 50000, 2600 /)
111	print*,'allocate dans ifs_rrtm'
112	allocate(config%i_band_from_g_sw (config%n_g_sw))
113	allocate(config%i_band_from_g_lw (config%n_g_lw))
114	allocate(config%i_band_from_reordered_g_sw(config%n_g_sw))
115	allocate(config%i_band_from_reordered_g_lw(config%n_g_lw))
116	allocate(config%i_g_from_reordered_g_sw(config%n_g_sw))
117	allocate(config%i_g_from_reordered_g_lw(config%n_g_lw))
118
119	! Shortwave starts at 16: need to start at 1
120	config%i_band_from_g_sw = ngb_sw - ngb_sw(1)+1
121	config%i_band_from_g_lw = ngb_lw
122
123	if (config%i_solver_sw == ISolverSpartacus) then
124	! SPARTACUS requires g points ordered in approximately
125	! increasing order of optical depth
126	config%i_g_from_reordered_g_sw = RRTM_GPOINT_REORDERING_SW
127	else
128	! Implied-do for no reordering
129	! config%i_g_from_reordered_g_sw = RRTM_GPOINT_REORDERING_SW
130	config%i_g_from_reordered_g_sw = (/ (irep, irep=1,config%n_g_sw) /)
131	end if
132
133	if (config%i_solver_lw == ISolverSpartacus) then
134	! SPARTACUS requires g points ordered in approximately
135	! increasing order of optical depth
136	config%i_g_from_reordered_g_lw = RRTM_GPOINT_REORDERING_LW
137	else
138	! Implied-do for no reordering
139	config%i_g_from_reordered_g_lw = (/ (irep, irep=1,config%n_g_lw) /)
140	end if
141
142	config%i_band_from_reordered_g_sw &
143	= config%i_band_from_g_sw(config%i_g_from_reordered_g_sw)
144
145	config%i_band_from_reordered_g_lw &
146	= config%i_band_from_g_lw(config%i_g_from_reordered_g_lw)
147
148	! The i_spec_* variables are used solely for storing spectral
149	! data, and this can either be by band or by g-point
150	if (config%do_save_spectral_flux) then
151	if (config%do_save_gpoint_flux) then
152	config%n_spec_sw = config%n_g_sw
153	config%n_spec_lw = config%n_g_lw
154	config%i_spec_from_reordered_g_sw => config%i_g_from_reordered_g_sw
155	config%i_spec_from_reordered_g_lw => config%i_g_from_reordered_g_lw
156	else
157	config%n_spec_sw = config%n_bands_sw
158	config%n_spec_lw = config%n_bands_lw
159	config%i_spec_from_reordered_g_sw => config%i_band_from_reordered_g_sw
160	config%i_spec_from_reordered_g_lw => config%i_band_from_reordered_g_lw
161	end if
162	else
163	config%n_spec_sw = 0
164	config%n_spec_lw = 0
165	nullify(config%i_spec_from_reordered_g_sw)
166	nullify(config%i_spec_from_reordered_g_lw)
167	end if
168
169	if (lhook) call dr_hook('radiation_ifs_rrtm:setup_gas_optics',1,hook_handle)
170
171	end subroutine setup_gas_optics
172
173
174	!---------------------------------------------------------------------
175	! Scale gas mixing ratios according to required units
176	subroutine set_gas_units(gas)
177
178	use radiation_gas, only : gas_type, IMassMixingRatio
179	type(gas_type), intent(inout) :: gas
180
181	call gas%set_units(IMassMixingRatio)
182
183	end subroutine set_gas_units
184
185
186	!---------------------------------------------------------------------
187	! Compute gas optical depths, shortwave scattering, Planck function
188	! and incoming shortwave radiation at top-of-atmosphere
189	subroutine gas_optics(ncol,nlev,istartcol,iendcol, &
190	& config, single_level, thermodynamics, gas, &
191	& od_lw, od_sw, ssa_sw, lw_albedo, planck_hl, lw_emission, &
192	& incoming_sw)
193
194	use parkind1, only : jprb, jpim
195
196	USE PARRRTM , ONLY : JPBAND, JPXSEC, JPINPX
197	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
198	USE YOESRTM , ONLY : JPGPT_SW => JPGPT
199	!USE YOMDIMV , ONLY : YRDIMV
200	use yomhook , only : lhook, dr_hook
201
202	use radiation_config, only : config_type, ISolverSpartacus
203	use radiation_thermodynamics, only : thermodynamics_type
204	use radiation_single_level, only : single_level_type
205	use radiation_gas
206
207	integer, intent(in) :: ncol ! number of columns
208	integer, intent(in) :: nlev ! number of model levels
209	integer, intent(in) :: istartcol, iendcol ! range of columns to process
210	type(config_type), intent(in) :: config
211	type(single_level_type), intent(in) :: single_level
212	type(thermodynamics_type),intent(in) :: thermodynamics
213	type(gas_type), intent(in) :: gas
214
215	! Longwave albedo of the surface
216	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
217	& intent(in), optional :: lw_albedo
218
219	! Gaseous layer optical depth in longwave and shortwave, and
220	! shortwave single scattering albedo (i.e. fraction of extinction
221	! due to Rayleigh scattering) at each g-point
222	real(jprb), dimension(config%n_g_lw,nlev,istartcol:iendcol), intent(out) :: &
223	& od_lw
224	real(jprb), dimension(config%n_g_sw,nlev,istartcol:iendcol), intent(out) :: &
225	& od_sw, ssa_sw
226
227	! The Planck function (emitted flux from a black body) at half
228	! levels at each longwave g-point
229	real(jprb), dimension(config%n_g_lw,nlev+1,istartcol:iendcol), &
230	& intent(out), optional :: planck_hl
231	! Planck function for the surface (W m-2)
232	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
233	& intent(out), optional :: lw_emission
234
235	! The incoming shortwave flux into a plane perpendicular to the
236	! incoming radiation at top-of-atmosphere in each of the shortwave
237	! g-points
238	real(jprb), dimension(config%n_g_sw,istartcol:iendcol), &
239	& intent(out), optional :: incoming_sw
240
241	real(jprb) :: incoming_sw_scale(istartcol:iendcol)
242
243	! The variables in capitals are used in the same way as the
244	! equivalent routine in the IFS
245
246	real(jprb) :: ZOD_LW(JPGPT_LW,nlev,istartcol:iendcol) ! Note ordering of dimensions
247	real(jprb) :: ZOD_SW(istartcol:iendcol,nlev,JPGPT_SW)
248	real(jprb) :: ZSSA_SW(istartcol:iendcol,nlev,JPGPT_SW)
249	real(jprb) :: ZINCSOL(istartcol:iendcol,JPGPT_SW)
250
251	real(jprb) :: ZCOLMOL(istartcol:iendcol,nlev)
252	real(jprb) :: ZCOLDRY(istartcol:iendcol,nlev)
253	real(jprb) :: ZWBRODL(istartcol:iendcol,nlev) !BROADENING GASES,column density (mol/cm2)
254	real(jprb) :: ZCOLBRD(istartcol:iendcol,nlev) !BROADENING GASES, column amount
255	real(jprb) :: ZWKL(istartcol:iendcol,JPINPX,nlev)
256
257	real(jprb) :: ZWX(istartcol:iendcol,JPXSEC,nlev) ! Amount of trace gases
258
259	real(jprb) :: ZFLUXFAC, ZPI
260
261	! - from AER
262	real(jprb) :: ZTAUAERL(istartcol:iendcol,nlev,JPBAND)
263
264	!- from INTFAC
265	real(jprb) :: ZFAC00(istartcol:iendcol,nlev)
266	real(jprb) :: ZFAC01(istartcol:iendcol,nlev)
267	real(jprb) :: ZFAC10(istartcol:iendcol,nlev)
268	real(jprb) :: ZFAC11(istartcol:iendcol,nlev)
269
270	!- from FOR
271	real(jprb) :: ZFORFAC(istartcol:iendcol,nlev)
272	real(jprb) :: ZFORFRAC(istartcol:iendcol,nlev)
273	integer :: INDFOR(istartcol:iendcol,nlev)
274
275	!- from MINOR
276	integer :: INDMINOR(istartcol:iendcol,nlev)
277	real(jprb) :: ZSCALEMINOR(istartcol:iendcol,nlev)
278	real(jprb) :: ZSCALEMINORN2(istartcol:iendcol,nlev)
279	real(jprb) :: ZMINORFRAC(istartcol:iendcol,nlev)
280
281	real(jprb) :: &
282	& ZRAT_H2OCO2(istartcol:iendcol,nlev),ZRAT_H2OCO2_1(istartcol:iendcol,nlev), &
283	& ZRAT_H2OO3(istartcol:iendcol,nlev) ,ZRAT_H2OO3_1(istartcol:iendcol,nlev), &
284	& ZRAT_H2ON2O(istartcol:iendcol,nlev),ZRAT_H2ON2O_1(istartcol:iendcol,nlev), &
285	& ZRAT_H2OCH4(istartcol:iendcol,nlev),ZRAT_H2OCH4_1(istartcol:iendcol,nlev), &
286	& ZRAT_N2OCO2(istartcol:iendcol,nlev),ZRAT_N2OCO2_1(istartcol:iendcol,nlev), &
287	& ZRAT_O3CO2(istartcol:iendcol,nlev) ,ZRAT_O3CO2_1(istartcol:iendcol,nlev)
288
289	!- from INTIND
290	integer :: JP(istartcol:iendcol,nlev)
291	integer :: JT(istartcol:iendcol,nlev)
292	integer :: JT1(istartcol:iendcol,nlev)
293
294	!- from PRECISE
295	real(jprb) :: ZONEMINUS, ZONEMINUS_ARRAY(istartcol:iendcol)
296
297	!- from PROFDATA
298	real(jprb) :: ZCOLH2O(istartcol:iendcol,nlev)
299	real(jprb) :: ZCOLCO2(istartcol:iendcol,nlev)
300	real(jprb) :: ZCOLO3(istartcol:iendcol,nlev)
301	real(jprb) :: ZCOLN2O(istartcol:iendcol,nlev)
302	real(jprb) :: ZCOLCH4(istartcol:iendcol,nlev)
303	real(jprb) :: ZCOLO2(istartcol:iendcol,nlev)
304	real(jprb) :: ZCO2MULT(istartcol:iendcol,nlev)
305	integer :: ILAYTROP(istartcol:iendcol)
306	integer :: ILAYSWTCH(istartcol:iendcol)
307	integer :: ILAYLOW(istartcol:iendcol)
308
309	!- from PROFILE
310	real(jprb) :: ZPAVEL(istartcol:iendcol,nlev)
311	real(jprb) :: ZTAVEL(istartcol:iendcol,nlev)
312	real(jprb) :: ZPZ(istartcol:iendcol,0:nlev)
313	real(jprb) :: ZTZ(istartcol:iendcol,0:nlev)
314
315	!- from SELF
316	real(jprb) :: ZSELFFAC(istartcol:iendcol,nlev)
317	real(jprb) :: ZSELFFRAC(istartcol:iendcol,nlev)
318	integer :: INDSELF(istartcol:iendcol,nlev)
319
320	!- from SP
321	real(jprb) :: ZPFRAC(istartcol:iendcol,JPGPT_LW,nlev)
322
323	!- from SURFACE
324	integer :: IREFLECT(istartcol:iendcol)
325
326	real(jprb) :: pressure_fl(ncol, nlev), temperature_fl(ncol, nlev)
327
328	! If nlev is less than the number of heights at which gas mixing
329	! ratios are stored, then we assume that the lower part of the
330	! atmosphere is required. This enables nlev=1 to be passed in to
331	! the routine, in which case the gas properties of the lowest
332	! layer are provided, useful for canopy radiative transfer.
333	integer :: istartlev, iendlev
334
335	integer :: jlev, jgreorder, jg, ig, iband, jcol
336
337	real(jprb) :: hook_handle
338
339	#include "rrtm_prepare_gases.intfb.h"
340	#include "rrtm_setcoef_140gp.intfb.h"
341	#include "rrtm_gas_optical_depth.intfb.h"
342	#include "srtm_setcoef.intfb.h"
343	#include "srtm_gas_optical_depth.intfb.h"
344
345	if (lhook) call dr_hook('radiation_ifs_rrtm:gas_optics',0,hook_handle)
346
347	! Compute start and end levels for indexing the gas mixing ratio
348	! and thermodynamics arrays
349	iendlev = ubound(gas%mixing_ratio,2)
350	istartlev = iendlev - nlev + 1
351
352	ZPI = 2.0_jprb*ASIN(1.0_jprb)
353	ZFLUXFAC = ZPI * 1.E+4
354	ZONEMINUS = 1.0_jprb - 1.0e-6_jprb
355	ZONEMINUS_ARRAY = ZONEMINUS
356
357	! if (.not. associated(YRDIMV)) then
358	! allocate(YRDIMV)
359	! YRDIMV%NFLEVG = nlev
360	! end if
361
362	pressure_fl(istartcol:iendcol,:) &
363	& = 0.5_jprb * (thermodynamics%pressure_hl(istartcol:iendcol,istartlev:iendlev) &
364	& +thermodynamics%pressure_hl(istartcol:iendcol,istartlev+1:iendlev+1))
365	temperature_fl(istartcol:iendcol,:) &
366	& = 0.5_jprb * (thermodynamics%temperature_hl(istartcol:iendcol,istartlev:iendlev) &
367	& +thermodynamics%temperature_hl(istartcol:iendcol,istartlev+1:iendlev+1))
368
369	! Check we have gas mixing ratios in the right units
370	call gas%assert_units(IMassMixingRatio)
371
372	! Warning: O2 is hard-coded within the following function so the
373	! user-provided concentrations of this gas are ignored for both
374	! the longwave and shortwave
375	CALL RRTM_PREPARE_GASES &
376	& ( istartcol, iendcol, ncol, nlev, &
377	& thermodynamics%pressure_hl(:,istartlev:iendlev+1), &
378	& pressure_fl, &
379	& thermodynamics%temperature_hl(:,istartlev:iendlev+1), &
380	& temperature_fl, &
381	& gas%mixing_ratio(:,istartlev:iendlev,IH2O), &
382	& gas%mixing_ratio(:,istartlev:iendlev,ICO2), &
383	& gas%mixing_ratio(:,istartlev:iendlev,ICH4), &
384	& gas%mixing_ratio(:,istartlev:iendlev,IN2O), &
385	& gas%mixing_ratio(:,istartlev:iendlev,INO2), &
386	& gas%mixing_ratio(:,istartlev:iendlev,ICFC11), &
387	& gas%mixing_ratio(:,istartlev:iendlev,ICFC12), &
388	& gas%mixing_ratio(:,istartlev:iendlev,IHCFC22), &
389	& gas%mixing_ratio(:,istartlev:iendlev,ICCl4), &
390	& gas%mixing_ratio(:,istartlev:iendlev,IO3), &
391	& ZCOLDRY, ZWBRODL,ZWKL, ZWX, &
392	& ZPAVEL , ZTAVEL , ZPZ , ZTZ, IREFLECT)
393
394	CALL RRTM_SETCOEF_140GP &
395	&( istartcol, iendcol, nlev , ZCOLDRY , ZWBRODL , ZWKL , &
396	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11 , ZFORFAC,ZFORFRAC,INDFOR, JP, JT, JT1 , &
397	& ZCOLH2O, ZCOLCO2 , ZCOLO3 , ZCOLN2O, ZCOLCH4, ZCOLO2,ZCO2MULT , ZCOLBRD, &
398	& ILAYTROP,ILAYSWTCH, ILAYLOW, ZPAVEL , ZTAVEL , ZSELFFAC, ZSELFFRAC, INDSELF, &
399	& INDMINOR,ZSCALEMINOR,ZSCALEMINORN2,ZMINORFRAC,&
400	& ZRAT_H2OCO2, ZRAT_H2OCO2_1, ZRAT_H2OO3, ZRAT_H2OO3_1, &
401	& ZRAT_H2ON2O, ZRAT_H2ON2O_1, ZRAT_H2OCH4, ZRAT_H2OCH4_1, &
402	& ZRAT_N2OCO2, ZRAT_N2OCO2_1, ZRAT_O3CO2, ZRAT_O3CO2_1)
403
404	ZTAUAERL = 0.0_jprb
405
406	CALL RRTM_GAS_OPTICAL_DEPTH &
407	&( istartcol, iendcol, nlev, ZOD_LW, ZPAVEL, ZCOLDRY, ZCOLBRD, ZWX ,&
408	& ZTAUAERL, ZFAC00 , ZFAC01, ZFAC10 , ZFAC11 , ZFORFAC,ZFORFRAC,INDFOR, &
409	& JP, JT, JT1, ZONEMINUS ,&
410	& ZCOLH2O , ZCOLCO2, ZCOLO3, ZCOLN2O, ZCOLCH4, ZCOLO2,ZCO2MULT ,&
411	& ILAYTROP, ILAYSWTCH,ILAYLOW, ZSELFFAC, ZSELFFRAC, INDSELF, ZPFRAC, &
412	& INDMINOR,ZSCALEMINOR,ZSCALEMINORN2,ZMINORFRAC,&
413	& ZRAT_H2OCO2, ZRAT_H2OCO2_1, ZRAT_H2OO3, ZRAT_H2OO3_1, &
414	& ZRAT_H2ON2O, ZRAT_H2ON2O_1, ZRAT_H2OCH4, ZRAT_H2OCH4_1, &
415	& ZRAT_N2OCO2, ZRAT_N2OCO2_1, ZRAT_O3CO2, ZRAT_O3CO2_1)
416
417	if (present(lw_albedo)) then
418
419	call planck_function_atmos(nlev, istartcol, iendcol, config, &
420	& thermodynamics, ZPFRAC, planck_hl)
421
422	if (single_level%is_simple_surface) then
423	call planck_function_surf(istartcol, iendcol, config, &
424	& single_level%skin_temperature, ZPFRAC(:,:,1), &
425	& lw_emission)
426
427	! The following can be used to extract the parameters defined at
428	! the top of the planck_function routine below:
429	!write(*,'(a,140(e12.5,","),a)') 'ZPFRAC_surf=[', &
430	!& sum(ZPFRAC(istartcol:iendcol,:,1),1) / (iendcol+1-istartcol), ']'
431
432	! lw_emission at this point is actually the planck function of
433	! the surface
434	lw_emission = lw_emission * (1.0_jprb - lw_albedo)
435	else
436	! Longwave emission has already been computed
437	if (config%use_canopy_full_spectrum_lw) then
438	lw_emission = transpose(single_level%lw_emission(istartcol:iendcol,:))
439	else
440	lw_emission = transpose(single_level%lw_emission(istartcol:iendcol, &
441	& config%i_emiss_from_band_lw(config%i_band_from_reordered_g_lw)))
442	end if
443	end if
444
445	end if
446
447	if (config%i_solver_lw == ISolverSpartacus) then
448	! if (.true.) then
449	! We need to rearrange the gas optics info in memory: reordering
450	! the g points in order of approximately increasing optical
451	! depth (for efficient 3D processing on only the regions of the
452	! spectrum that are optically thin for gases) and reorder in
453	! pressure since the the functions above treat pressure
454	! decreasing with increasing index. Note that the output gas
455	! arrays have dimensions in a different order to the inputs,
456	! so there is some inefficiency here.
457	do jgreorder = 1,config%n_g_lw
458	iband = config%i_band_from_reordered_g_lw(jgreorder)
459	ig = config%i_g_from_reordered_g_lw(jgreorder)
460
461	! Top-of-atmosphere half level
462	do jlev = 1,nlev
463	do jcol = istartcol,iendcol
464	! Some g points can return negative optical depths;
465	! specifically original g points 54-56 which causes
466	! unphysical single-scattering albedo when combined with
467	! aerosol
468	od_lw(jgreorder,jlev,jcol) &
469	& = max(config%min_gas_od_lw, ZOD_LW(ig,nlev+1-jlev,jcol))
470	end do
471	end do
472	end do
473	else
474	! G points have not been reordered
475	do jcol = istartcol,iendcol
476	do jlev = 1,nlev
477	! Check for negative optical depth
478	od_lw(:,jlev,jcol) = max(config%min_gas_od_lw, ZOD_LW(:,nlev+1-jlev,jcol))
479	end do
480	end do
481	end if
482
483	CALL SRTM_SETCOEF &
484	& ( istartcol, iendcol, nlev,&
485	& ZPAVEL , ZTAVEL,&
486	& ZCOLDRY , ZWKL,&
487	& ILAYTROP,&
488	& ZCOLCH4 , ZCOLCO2 , ZCOLH2O , ZCOLMOL , ZCOLO2 , ZCOLO3,&
489	& ZFORFAC , ZFORFRAC , INDFOR , ZSELFFAC, ZSELFFRAC, INDSELF, &
490	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11,&
491	& JP , JT , JT1 , single_level%cos_sza(istartcol:iendcol) &
492	& )
493
494	! SRTM_GAS_OPTICAL_DEPTH will not initialize profiles when the sun
495	! is below the horizon, so we do it here
496	ZOD_SW(istartcol:iendcol,:,:) = 0.0_jprb
497	ZSSA_SW(istartcol:iendcol,:,:) = 0.0_jprb
498	ZINCSOL(istartcol:iendcol,:) = 0.0_jprb
499
500	CALL SRTM_GAS_OPTICAL_DEPTH &
501	&( istartcol, iendcol , nlev , ZONEMINUS_ARRAY,&
502	& single_level%cos_sza(istartcol:iendcol), ILAYTROP,&
503	& ZCOLCH4 , ZCOLCO2 , ZCOLH2O, ZCOLMOL , ZCOLO2 , ZCOLO3,&
504	& ZFORFAC , ZFORFRAC , INDFOR , ZSELFFAC, ZSELFFRAC, INDSELF,&
505	& ZFAC00 , ZFAC01 , ZFAC10 , ZFAC11 ,&
506	& JP , JT , JT1 ,&
507	& ZOD_SW , ZSSA_SW , ZINCSOL )
508
509	! Scale the incoming solar per band, if requested
510	if (config%use_spectral_solar_scaling) then
511	ZINCSOL(istartcol:iendcol,:) = ZINCSOL(istartcol:iendcol,:) &
512	& * spread(single_level%spectral_solar_scaling(config%i_band_from_reordered_g_sw), &
513	& 1,iendcol-istartcol+1)
514	end if
515
516	! Scaling factor to ensure that the total solar irradiance is as
517	! requested. Note that if the sun is below the horizon then
518	! ZINCSOL will be zero.
519	if (present(incoming_sw)) then
520	incoming_sw_scale = 1.0_jprb
521	do jcol = istartcol,iendcol
522	if (single_level%cos_sza(jcol) > 0.0_jprb) then
523	incoming_sw_scale(jcol) = single_level%solar_irradiance / sum(ZINCSOL(jcol,:))
524	end if
525	end do
526	end if
527
528	if (config%i_solver_sw == ISolverSpartacus) then
529	! if (.true.) then
530	! Account for reordered g points
531	do jgreorder = 1,config%n_g_sw
532	ig = config%i_g_from_reordered_g_sw(jgreorder)
533	do jlev = 1,nlev
534	do jcol = istartcol,iendcol
535	! Check for negative optical depth
536	od_sw (jgreorder,nlev+1-jlev,jcol) &
537	& = max(config%min_gas_od_sw, ZOD_SW (jcol,jlev,ig))
538	ssa_sw(jgreorder,nlev+1-jlev,jcol) = ZSSA_SW(jcol,jlev,ig)
539	end do
540	end do
541	if (present(incoming_sw)) then
542	incoming_sw(jgreorder,:) &
543	& = incoming_sw_scale(:) * ZINCSOL(:,ig)
544	end if
545	end do
546	else
547	! G points have not been reordered
548	do jg = 1,config%n_g_sw
549	do jlev = 1,nlev
550	do jcol = istartcol,iendcol
551	! Check for negative optical depth
552	od_sw (jg,nlev+1-jlev,jcol) = max(config%min_gas_od_sw, ZOD_SW(jcol,jlev,jg))
553	ssa_sw(jg,nlev+1-jlev,jcol) = ZSSA_SW(jcol,jlev,jg)
554	end do
555	end do
556	if (present(incoming_sw)) then
557	incoming_sw(jg,:) &
558	& = incoming_sw_scale(:) * ZINCSOL(:,jg)
559	end if
560	end do
561	end if
562
563	if (lhook) call dr_hook('radiation_ifs_rrtm:gas_optics',1,hook_handle)
564
565	end subroutine gas_optics
566
567
568	!---------------------------------------------------------------------
569	! Compute Planck function of the atmosphere
570	subroutine planck_function_atmos(nlev,istartcol,iendcol, &
571	config, thermodynamics, PFRAC, &
572	planck_hl)
573
574	use parkind1, only : jprb, jpim
575
576	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
577	use yoerrtwn, only : totplnk, delwave
578
579	use yomhook, only : lhook, dr_hook
580
581	use radiation_config, only : config_type, ISolverSpartacus
582	use radiation_thermodynamics, only : thermodynamics_type
583	!use radiation_gas
584
585	integer, intent(in) :: nlev ! number of model levels
586	integer, intent(in) :: istartcol, iendcol ! range of columns to process
587	type(config_type), intent(in) :: config
588	type(thermodynamics_type),intent(in) :: thermodynamics
589	real(jprb), intent(in) :: PFRAC(istartcol:iendcol,JPGPT_LW,nlev)
590
591	! The Planck function (emitted flux from a black body) at half
592	! levels at each longwave g-point
593	real(jprb), dimension(config%n_g_lw,nlev+1,istartcol:iendcol), intent(out) :: &
594	& planck_hl
595
596	! Planck function values per band
597	real(jprb), dimension(istartcol:iendcol, config%n_bands_lw) :: planck_store
598
599	! Look-up table variables for Planck function
600	real(jprb), dimension(istartcol:iendcol) :: frac
601	integer, dimension(istartcol:iendcol) :: ind
602
603	! Temperature (K) of a half-level
604	real(jprb) :: temperature
605
606	real(jprb) :: factor
607	real(jprb) :: ZFLUXFAC
608
609	integer :: jlev, jgreorder, jg, ig, iband, jband, jcol, ilevoffset
610
611	real(jprb) :: hook_handle
612
613	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_atmos',0,hook_handle)
614
615	ZFLUXFAC = 2.0_jprbASIN(1.0_jprb) 1.0e4_jprb
616
617	! nlev may be less than the number of original levels, in which
618	! case we assume that the user wants the lower part of the
619	! atmosphere
620	ilevoffset = ubound(thermodynamics%temperature_hl,2)-nlev-1
621
622	! Work out interpolations: for each half level, the index of the
623	! lowest interpolation bound, and the fraction into interpolation
624	! interval
625	do jlev = 1,nlev+1
626	do jcol = istartcol,iendcol
627	temperature = thermodynamics%temperature_hl(jcol,jlev+ilevoffset)
628	if (temperature < 339.0_jprb .and. temperature >= 160.0_jprb) then
629	! Linear interpolation between -113 and 66 degC
630	ind(jcol) = int(temperature - 159.0_jprb)
631	frac(jcol) = temperature - int(temperature)
632	else if(temperature >= 339.0_jprb) then
633	! Extrapolation above 66 degC
634	ind(jcol) = 180
635	frac(jcol) = temperature - 339.0_jprb
636	else
637	! Cap below -113 degC (to avoid possible negative Planck
638	! function values)
639	ind(jcol) = 1
640	frac(jcol) = 0.0_jprb
641	end if
642	end do
643
644	! Calculate Planck functions per band
645	do jband = 1,config%n_bands_lw
646	factor = zfluxfac * delwave(jband)
647	do jcol = istartcol,iendcol
648	planck_store(jcol,jband) = factor &
649	& * (totplnk(ind(jcol),jband) &
650	& + frac(jcol)*(totplnk(ind(jcol)+1,jband)-totplnk(ind(jcol),jband)))
651	end do
652	end do
653
654	if (config%i_solver_lw == ISolverSpartacus) then
655	! We need to rearrange the gas optics info in memory:
656	! reordering the g points in order of approximately increasing
657	! optical depth (for efficient 3D processing on only the
658	! regions of the spectrum that are optically thin for gases)
659	! and reorder in pressure since the the functions above treat
660	! pressure decreasing with increasing index.
661	if (jlev == 1) then
662	! Top-of-atmosphere half level - note that PFRAC is on model
663	! levels not half levels
664	do jgreorder = 1,config%n_g_lw
665	iband = config%i_band_from_reordered_g_lw(jgreorder)
666	ig = config%i_g_from_reordered_g_lw(jgreorder)
667	planck_hl(jgreorder,1,:) = planck_store(:,iband) &
668	& * PFRAC(:,ig,nlev)
669	end do
670	else
671	do jgreorder = 1,config%n_g_lw
672	iband = config%i_band_from_reordered_g_lw(jgreorder)
673	ig = config%i_g_from_reordered_g_lw(jgreorder)
674	planck_hl(jgreorder,jlev,:) &
675	& = planck_store(:,iband) &
676	& * PFRAC(:,ig,nlev+2-jlev)
677	end do
678	end if
679	else
680	! G points have not been reordered
681	if (jlev == 1) then
682	! Top-of-atmosphere half level - note that PFRAC is on model
683	! levels not half levels
684	do jg = 1,config%n_g_lw
685	iband = config%i_band_from_g_lw(jg)
686	planck_hl(jg,1,:) = planck_store(:,iband) * PFRAC(:,jg,nlev)
687	end do
688	else
689	do jg = 1,config%n_g_lw
690	iband = config%i_band_from_g_lw(jg)
691	planck_hl(jg,jlev,:) = planck_store(:,iband) * PFRAC(:,jg,nlev+2-jlev)
692	end do
693	end if
694	end if
695	end do
696
697	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_atmos',1,hook_handle)
698
699	end subroutine planck_function_atmos
700
701
702	!---------------------------------------------------------------------
703	! Compute Planck function of the surface
704	subroutine planck_function_surf(istartcol, iendcol, config, temperature, PFRAC, &
705	& planck_surf)
706
707	use parkind1, only : jprb, jpim
708
709	USE YOERRTM , ONLY : JPGPT_LW => JPGPT
710	use yoerrtwn, only : totplnk, delwave
711
712	use yomhook, only : lhook, dr_hook
713
714	use radiation_config, only : config_type, ISolverSpartacus
715	! use radiation_gas
716
717	integer, intent(in) :: istartcol, iendcol ! range of columns to process
718	type(config_type), intent(in) :: config
719	real(jprb), intent(in) :: temperature(:)
720
721	real(jprb), intent(in) :: PFRAC(istartcol:iendcol,JPGPT_LW)
722
723	! Planck function of the surface (W m-2)
724	real(jprb), dimension(config%n_g_lw,istartcol:iendcol), &
725	& intent(out) :: planck_surf
726
727	! Planck function values per band
728	real(jprb), dimension(istartcol:iendcol, config%n_bands_lw) :: planck_store
729
730	! Look-up table variables for Planck function
731	real(jprb), dimension(istartcol:iendcol) :: frac
732	integer, dimension(istartcol:iendcol) :: ind
733
734	! Temperature (K)
735	real(jprb) :: Tsurf
736
737	real(jprb) :: factor
738	real(jprb) :: ZFLUXFAC
739
740	integer :: jgreorder, jg, ig, iband, jband, jcol
741
742	real(jprb) :: hook_handle
743
744	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_surf',0,hook_handle)
745
746	ZFLUXFAC = 2.0_jprbASIN(1.0_jprb) 1.0e4_jprb
747
748	! Work out surface interpolations
749	do jcol = istartcol,iendcol
750	Tsurf = temperature(jcol)
751	if (Tsurf < 339.0_jprb .and. Tsurf >= 160.0_jprb) then
752	! Linear interpolation between -113 and 66 degC
753	ind(jcol) = int(Tsurf - 159.0_jprb)
754	frac(jcol) = Tsurf - int(Tsurf)
755	else if(Tsurf >= 339.0_jprb) then
756	! Extrapolation above 66 degC
757	ind(jcol) = 180
758	frac(jcol) = Tsurf - 339.0_jprb
759	else
760	! Cap below -113 degC (to avoid possible negative Planck
761	! function values)
762	ind(jcol) = 1
763	frac(jcol) = 0.0_jprb
764	end if
765	end do
766
767	! Calculate Planck functions per band
768	do jband = 1,config%n_bands_lw
769	factor = zfluxfac * delwave(jband)
770	do jcol = istartcol,iendcol
771	planck_store(jcol,jband) = factor &
772	& * (totplnk(ind(jcol),jband) &
773	& + frac(jcol)*(totplnk(ind(jcol)+1,jband)-totplnk(ind(jcol),jband)))
774	end do
775	end do
776
777	if (config%i_solver_lw == ISolverSpartacus) then
778	! We need to rearrange the gas optics info in memory: reordering
779	! the g points in order of approximately increasing optical
780	! depth (for efficient 3D processing on only the regions of
781	! the spectrum that are optically thin for gases) and reorder
782	! in pressure since the the functions above treat pressure
783	! decreasing with increasing index.
784	do jgreorder = 1,config%n_g_lw
785	iband = config%i_band_from_reordered_g_lw(jgreorder)
786	ig = config%i_g_from_reordered_g_lw(jgreorder)
787	planck_surf(jgreorder,:) = planck_store(:,iband) * PFRAC(:,ig)
788	end do
789	else
790	! G points have not been reordered
791	do jg = 1,config%n_g_lw
792	iband = config%i_band_from_g_lw(jg)
793	planck_surf(jg,:) = planck_store(:,iband) * PFRAC(:,jg)
794	end do
795	end if
796
797	if (lhook) call dr_hook('radiation_ifs_rrtm:planck_function_surf',1,hook_handle)
798
799	end subroutine planck_function_surf
800
801
802	!---------------------------------------------------------------------
803	! Externally facing function for computing the Planck function
804	! without reference to any gas profile; typically this would be used
805	! for computing the emission by facets of a complex surface. Note
806	! that this uses fixed "PFRAC" values, obtained by averaging over
807	! those derived from RRTM-G for near-surface conditions over a line
808	! of meridian from the ECMWF model.
809	subroutine planck_function(config, temperature, planck_surf)
810
811	use parkind1, only : jprb, jpim
812
813	use radiation_config, only : config_type
814
815	type(config_type), intent(in) :: config
816	real(jprb), intent(in) :: temperature
817
818	! Planck function of the surface (W m-2)
819	real(jprb), dimension(config%n_g_lw), &
820	& intent(out) :: planck_surf
821
822	! Fraction of each band contributed by each g-point within
823	! it. Since there are 16 bands, this array sums to 16
824	real(jprb), parameter, dimension(1,140) :: frac &
825	= reshape( (/ 0.21227E+00, 0.18897E+00, 0.25491E+00, 0.17864E+00, 0.11735E+00, 0.38298E-01, 0.57871E-02, &
826	& 0.31753E-02, 0.53169E-03, 0.76476E-04, 0.16388E+00, 0.15241E+00, 0.14290E+00, 0.12864E+00, &
827	& 0.11615E+00, 0.10047E+00, 0.80013E-01, 0.60445E-01, 0.44918E-01, 0.63395E-02, 0.32942E-02, &
828	& 0.54541E-03, 0.15380E+00, 0.15194E+00, 0.14339E+00, 0.13138E+00, 0.11701E+00, 0.10081E+00, &
829	& 0.82296E-01, 0.61735E-01, 0.41918E-01, 0.45918E-02, 0.37743E-02, 0.30121E-02, 0.22500E-02, &
830	& 0.14490E-02, 0.55410E-03, 0.78364E-04, 0.15938E+00, 0.15146E+00, 0.14213E+00, 0.13079E+00, &
831	& 0.11672E+00, 0.10053E+00, 0.81566E-01, 0.61126E-01, 0.41150E-01, 0.44488E-02, 0.36950E-02, &
832	& 0.29101E-02, 0.21357E-02, 0.19609E-02, 0.14134E+00, 0.14390E+00, 0.13913E+00, 0.13246E+00, &
833	& 0.12185E+00, 0.10596E+00, 0.87518E-01, 0.66164E-01, 0.44862E-01, 0.49402E-02, 0.40857E-02, &
834	& 0.32288E-02, 0.23613E-02, 0.15406E-02, 0.58258E-03, 0.82171E-04, 0.29127E+00, 0.28252E+00, &
835	& 0.22590E+00, 0.14314E+00, 0.45494E-01, 0.71792E-02, 0.38483E-02, 0.65712E-03, 0.29810E+00, &
836	& 0.27559E+00, 0.11997E+00, 0.10351E+00, 0.84515E-01, 0.62253E-01, 0.41050E-01, 0.44217E-02, &
837	& 0.36946E-02, 0.29113E-02, 0.34290E-02, 0.55993E-03, 0.31441E+00, 0.27586E+00, 0.21297E+00, &
838	& 0.14064E+00, 0.45588E-01, 0.65665E-02, 0.34232E-02, 0.53199E-03, 0.19811E+00, 0.16833E+00, &
839	& 0.13536E+00, 0.11549E+00, 0.10649E+00, 0.93264E-01, 0.75720E-01, 0.56405E-01, 0.41865E-01, &
840	& 0.59331E-02, 0.26510E-02, 0.40040E-03, 0.32328E+00, 0.26636E+00, 0.21397E+00, 0.14038E+00, &
841	& 0.52142E-01, 0.38852E-02, 0.14601E+00, 0.13824E+00, 0.27703E+00, 0.22388E+00, 0.15446E+00, &
842	& 0.48687E-01, 0.98054E-02, 0.18870E-02, 0.11961E+00, 0.12106E+00, 0.13215E+00, 0.13516E+00, &
843	& 0.25249E+00, 0.16542E+00, 0.68157E-01, 0.59725E-02, 0.49258E+00, 0.33651E+00, 0.16182E+00, &
844	& 0.90984E-02, 0.95202E+00, 0.47978E-01, 0.91716E+00, 0.82857E-01, 0.77464E+00, 0.22536E+00 /), (/ 1,140 /) )
845
846	call planck_function_surf(1, 1, config, spread(temperature,1,1), &
847	& frac, planck_surf)
848
849	end subroutine planck_function
850
851	end module radiation_ifs_rrtm

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