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cosp_optics.F90 @ 4976

Last change on this file since 4976 was 3358, checked in by idelkadi, 6 years ago
Implementation de la nouvelle version COSPv2 dans LMDZ. Pour compiler avec makelmdz_fcma utiliser l'option "-cosp2 true"
File size: 21.8 KB

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1	! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2	! Copyright (c) 2015, Regents of the University of Colorado
3	! All rights reserved.
4	!
5	! Redistribution and use in source and binary forms, with or without modification, are
6	! permitted provided that the following conditions are met:
7	!
8	! 1. Redistributions of source code must retain the above copyright notice, this list of
9	! conditions and the following disclaimer.
10	!
11	! 2. Redistributions in binary form must reproduce the above copyright notice, this list
12	! of conditions and the following disclaimer in the documentation and/or other
13	! materials provided with the distribution.
14	!
15	! 3. Neither the name of the copyright holder nor the names of its contributors may be
16	! used to endorse or promote products derived from this software without specific prior
17	! written permission.
18	!
19	! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
20	! EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21	! MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
22	! THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23	! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
24	! OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25	! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26	! LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	! OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	!
29	! History:
30	! 05/01/15 Dustin Swales - Original version
31	!
32	! %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
33	module cosp_optics
34	USE COSP_KINDS, ONLY: wp,dp
35	USE COSP_MATH_CONSTANTS, ONLY: pi
36	USE COSP_PHYS_CONSTANTS, ONLY: rholiq,km,rd,grav
37	USE MOD_MODIS_SIM, ONLY: get_g_nir,get_ssa_nir,phaseIsLiquid,phaseIsIce
38	implicit none
39
40	real(wp),parameter :: & !
41	ice_density = 0.93_wp ! Ice density used in MODIS phase partitioning
42
43	interface cosp_simulator_optics
44	module procedure cosp_simulator_optics2D, cosp_simulator_optics3D
45	end interface cosp_simulator_optics
46
47	contains
48	! ##########################################################################
49	! COSP_SIMULATOR_OPTICS
50	!
51	! Used by: ISCCP, MISR and MODIS simulators
52	! ##########################################################################
53	subroutine cosp_simulator_optics2D(dim1,dim2,dim3,flag,varIN1,varIN2,varOUT)
54	! INPUTS
55	integer,intent(in) :: &
56	dim1, & ! Dimension 1 extent (Horizontal)
57	dim2, & ! Dimension 2 extent (Subcolumn)
58	dim3 ! Dimension 3 extent (Vertical)
59	real(wp),intent(in),dimension(dim1,dim2,dim3) :: &
60	flag ! Logical to determine the of merge var1IN and var2IN
61	real(wp),intent(in),dimension(dim1, dim3) :: &
62	varIN1, & ! Input field 1
63	varIN2 ! Input field 2
64	! OUTPUTS
65	real(wp),intent(out),dimension(dim1,dim2,dim3) :: &
66	varOUT ! Merged output field
67	! LOCAL VARIABLES
68	integer :: j
69
70	varOUT(1:dim1,1:dim2,1:dim3) = 0._wp
71	do j=1,dim2
72	where(flag(:,j,:) .eq. 1)
73	varOUT(:,j,:) = varIN2
74	endwhere
75	where(flag(:,j,:) .eq. 2)
76	varOUT(:,j,:) = varIN1
77	endwhere
78	enddo
79	end subroutine cosp_simulator_optics2D
80	subroutine cosp_simulator_optics3D(dim1,dim2,dim3,flag,varIN1,varIN2,varOUT)
81	! INPUTS
82	integer,intent(in) :: &
83	dim1, & ! Dimension 1 extent (Horizontal)
84	dim2, & ! Dimension 2 extent (Subcolumn)
85	dim3 ! Dimension 3 extent (Vertical)
86	real(wp),intent(in),dimension(dim1,dim2,dim3) :: &
87	flag ! Logical to determine the of merge var1IN and var2IN
88	real(wp),intent(in),dimension(dim1,dim2,dim3) :: &
89	varIN1, & ! Input field 1
90	varIN2 ! Input field 2
91	! OUTPUTS
92	real(wp),intent(out),dimension(dim1,dim2,dim3) :: &
93	varOUT ! Merged output field
94
95	varOUT(1:dim1,1:dim2,1:dim3) = 0._wp
96	where(flag(:,:,:) .eq. 1)
97	varOUT(:,:,:) = varIN2
98	endwhere
99	where(flag(:,:,:) .eq. 2)
100	varOUT(:,:,:) = varIN1
101	endwhere
102
103	end subroutine cosp_simulator_optics3D
104
105	! ##############################################################################
106	! MODIS_OPTICS_PARTITION
107	!
108	! For the MODIS simulator, there are times when only a sinlge optical depth
109	! profile, cloud-ice and cloud-water are provided. In this case, the optical
110	! depth is partitioned by phase.
111	! ##############################################################################
112	subroutine MODIS_OPTICS_PARTITION(npoints,nlev,ncolumns,cloudWater,cloudIce,waterSize, &
113	iceSize,tau,tauL,tauI)
114	! INPUTS
115	INTEGER,intent(in) :: &
116	npoints, & ! Number of horizontal gridpoints
117	nlev, & ! Number of levels
118	ncolumns ! Number of subcolumns
119	REAL(wp),intent(in),dimension(npoints,nlev,ncolumns) :: &
120	cloudWater, & ! Subcolumn cloud water content
121	cloudIce, & ! Subcolumn cloud ice content
122	waterSize, & ! Subcolumn cloud water effective radius
123	iceSize, & ! Subcolumn cloud ice effective radius
124	tau ! Optical thickness
125
126	! OUTPUTS
127	real(wp),intent(out),dimension(npoints,nlev,ncolumns) :: &
128	tauL, & ! Partitioned liquid optical thickness.
129	tauI ! Partitioned ice optical thickness.
130	! LOCAL VARIABLES
131	real(wp),dimension(nlev,ncolumns) :: fracL
132	integer :: i
133
134
135	do i=1,npoints
136	where(cloudIce(i,:, :) <= 0.)
137	fracL(:, :) = 1._wp
138	elsewhere
139	where (cloudWater(i,:, :) <= 0.)
140	fracL(:, :) = 0._wp
141	elsewhere
142	! Geometic optics limit - tau as LWP/re (proportional to LWC/re)
143	fracL(:, :) = (cloudWater(i,:, :)/waterSize(i,:, :)) / &
144	(cloudWater(i,:, :)/waterSize(i,:, :) + cloudIce(i,:, :)/(ice_density * iceSize(i,:, :)) )
145	end where
146	end where
147	tauL(i,:, :) = fracL(:, :) * tau(i,:, :)
148	tauI(i,:, :) = tau(i,:, :) - tauL(i,:, :)
149	enddo
150
151	end subroutine MODIS_OPTICS_PARTITION
152	! ########################################################################################
153	! MODIS_OPTICS
154	!
155	! ########################################################################################
156	subroutine modis_optics(nPoints,nLevels,nSubCols,tauLIQ,sizeLIQ,tauICE,sizeICE,fracLIQ, g, w0)
157	! INPUTS
158	integer, intent(in) :: nPoints,nLevels,nSubCols
159	real(wp),intent(in),dimension(nPoints,nSubCols,nLevels) :: tauLIQ, sizeLIQ, tauICE, sizeICE
160	! OUTPUTS
161	real(wp),intent(out),dimension(nPoints,nSubCols,nLevels) :: g,w0,fracLIQ
162	! LOCAL VARIABLES
163	real(wp), dimension(nLevels) :: water_g, water_w0, ice_g, ice_w0,tau
164	integer :: i,j
165
166	! Initialize
167	g(1:nPoints,1:nSubCols,1:nLevels) = 0._wp
168	w0(1:nPoints,1:nSubCols,1:nLevels) = 0._wp
169
170	do j =1,nPoints
171	do i=1,nSubCols
172	water_g(1:nLevels) = get_g_nir( phaseIsLiquid, sizeLIQ(j,i,1:nLevels))
173	water_w0(1:nLevels) = get_ssa_nir(phaseIsLiquid, sizeLIQ(j,i,1:nLevels))
174	ice_g(1:nLevels) = get_g_nir( phaseIsIce, sizeICE(j,i,1:nLevels))
175	ice_w0(1:nLevels) = get_ssa_nir(phaseIsIce, sizeICE(j,i,1:nLevels))
176
177	! Combine ice and water optical properties
178	tau(1:nLevels) = tauICE(j,i,1:nLevels) + tauLIQ(j,i,1:nLevels)
179	where (tau(1:nLevels) > 0)
180	g(j,i,1:nLevels) = (tauLIQ(j,i,1:nLevels)water_g(1:nLevels) + tauICE(j,i,1:nLevels)ice_g(1:nLevels)) / &
181	tau(1:nLevels)
182	w0(j,i,1:nLevels) = (tauLIQ(j,i,1:nLevels)water_g(1:nLevels)water_w0(1:nLevels) + tauICE(j,i,1:nLevels) * &
183	ice_g(1:nLevels) * ice_w0(1:nLevels)) / (g(j,i,1:nLevels) * tau(1:nLevels))
184	end where
185	enddo
186	enddo
187
188	! Compute the total optical thickness and the proportion due to liquid in each cell
189	do i=1,npoints
190	where(tauLIQ(i,1:nSubCols,1:nLevels) + tauICE(i,1:nSubCols,1:nLevels) > 0.)
191	fracLIQ(i,1:nSubCols,1:nLevels) = tauLIQ(i,1:nSubCols,1:nLevels)/ &
192	(tauLIQ(i,1:nSubCols,1:nLevels) + tauICE(i,1:nSubCols,1:nLevels))
193	elsewhere
194	fracLIQ(i,1:nSubCols,1:nLevels) = 0._wp
195	end where
196	enddo
197
198	end subroutine modis_optics
199
200	! ######################################################################################
201	! SUBROUTINE lidar_optics
202	! ######################################################################################
203	subroutine lidar_optics(npoints,ncolumns,nlev,npart,ice_type,q_lsliq, q_lsice, &
204	q_cvliq, q_cvice,ls_radliq,ls_radice,cv_radliq,cv_radice, &
205	pres,presf,temp,beta_mol,betatot,tau_mol,tautot, &
206	tautot_S_liq,tautot_S_ice,betatot_ice,betatot_liq, &
207	tautot_ice,tautot_liq)
208	! ####################################################################################
209	! NOTE: Using "grav" from cosp_constants.f90, instead of grav=9.81, introduces
210	! changes of up to 2% in atb532 adn 0.003% in parasolRefl and lidarBetaMol532.
211	! This also results in small changes in the joint-histogram, cfadLidarsr532.
212	! ####################################################################################
213
214	! INPUTS
215	INTEGER,intent(in) :: &
216	npoints, & ! Number of gridpoints
217	ncolumns, & ! Number of subcolumns
218	nlev, & ! Number of levels
219	npart, & ! Number of cloud meteors (stratiform_liq, stratiform_ice, conv_liq, conv_ice).
220	ice_type ! Ice particle shape hypothesis (0 for spheres, 1 for non-spherical)
221	REAL(WP),intent(in),dimension(npoints,nlev) :: &
222	temp, & ! Temperature of layer k
223	pres, & ! Pressure at full levels
224	ls_radliq, & ! Effective radius of LS liquid particles (meters)
225	ls_radice, & ! Effective radius of LS ice particles (meters)
226	cv_radliq, & ! Effective radius of CONV liquid particles (meters)
227	cv_radice ! Effective radius of CONV ice particles (meters)
228	REAL(WP),intent(in),dimension(npoints,ncolumns,nlev) :: &
229	q_lsliq, & ! LS sub-column liquid water mixing ratio (kg/kg)
230	q_lsice, & ! LS sub-column ice water mixing ratio (kg/kg)
231	q_cvliq, & ! CONV sub-column liquid water mixing ratio (kg/kg)
232	q_cvice ! CONV sub-column ice water mixing ratio (kg/kg)
233	REAL(WP),intent(in),dimension(npoints,nlev+1) :: &
234	presf ! Pressure at half levels
235
236	! OUTPUTS
237	REAL(WP),intent(out),dimension(npoints,ncolumns,nlev) :: &
238	betatot, & !
239	tautot ! Optical thickess integrated from top
240	REAL(WP),intent(out),dimension(npoints,ncolumns,nlev) :: &
241	betatot_ice, & ! Backscatter coefficient for ice particles
242	betatot_liq, & ! Backscatter coefficient for liquid particles
243	tautot_ice, & ! Total optical thickness of ice
244	tautot_liq ! Total optical thickness of liq
245	REAL(WP),intent(out),dimension(npoints,nlev) :: &
246	beta_mol, & ! Molecular backscatter coefficient
247	tau_mol ! Molecular optical depth
248	REAL(WP),intent(out),dimension(npoints,ncolumns) :: &
249	tautot_S_liq, & ! TOA optical depth for liquid
250	tautot_S_ice ! TOA optical depth for ice
251
252	! LOCAL VARIABLES
253	REAL(WP),dimension(npart) :: rhopart
254	REAL(WP),dimension(npart,5) :: polpart
255	REAL(WP),dimension(npoints,nlev) :: rhoair,alpha_mol
256	REAL(WP),dimension(npoints,nlev+1) :: zheight
257	REAL(WP),dimension(npoints,nlev,npart) :: rad_part,kp_part,qpart
258	REAL(WP),dimension(npoints,ncolumns,nlev,npart) :: alpha_part,tau_part
259	INTEGER :: i,k,icol
260
261	! Local data
262	REAL(WP),PARAMETER :: rhoice = 0.5e+03 ! Density of ice (kg/m3)
263	REAL(WP),PARAMETER :: Cmol = 6.2446e-32 ! Wavelength dependent
264	REAL(WP),PARAMETER :: rdiffm = 0.7_wp ! Multiple scattering correction parameter
265	REAL(WP),PARAMETER :: Qscat = 2.0_wp ! Particle scattering efficiency at 532 nm
266	! Local indicies for large-scale and convective ice and liquid
267	INTEGER,PARAMETER :: INDX_LSLIQ = 1
268	INTEGER,PARAMETER :: INDX_LSICE = 2
269	INTEGER,PARAMETER :: INDX_CVLIQ = 3
270	INTEGER,PARAMETER :: INDX_CVICE = 4
271
272	! Polarized optics parameterization
273	! Polynomial coefficients for spherical liq/ice particles derived from Mie theory.
274	! Polynomial coefficients for non spherical particles derived from a composite of
275	! Ray-tracing theory for large particles (e.g. Noel et al., Appl. Opt., 2001)
276	! and FDTD theory for very small particles (Yang et al., JQSRT, 2003).
277	! We repeat the same coefficients for LS and CONV cloud to make code more readable
278	REAL(WP),PARAMETER,dimension(5) :: &
279	polpartCVLIQ = (/ 2.6980e-8_wp, -3.7701e-6_wp, 1.6594e-4_wp, -0.0024_wp, 0.0626_wp/), &
280	polpartLSLIQ = (/ 2.6980e-8_wp, -3.7701e-6_wp, 1.6594e-4_wp, -0.0024_wp, 0.0626_wp/), &
281	polpartCVICE0 = (/-1.0176e-8_wp, 1.7615e-6_wp, -1.0480e-4_wp, 0.0019_wp, 0.0460_wp/), &
282	polpartLSICE0 = (/-1.0176e-8_wp, 1.7615e-6_wp, -1.0480e-4_wp, 0.0019_wp, 0.0460_wp/), &
283	polpartCVICE1 = (/ 1.3615e-8_wp, -2.04206e-6_wp, 7.51799e-5_wp, 0.00078213_wp, 0.0182131_wp/), &
284	polpartLSICE1 = (/ 1.3615e-8_wp, -2.04206e-6_wp, 7.51799e-5_wp, 0.00078213_wp, 0.0182131_wp/)
285	! ##############################################################################
286
287	! Liquid/ice particles
288	rhopart(INDX_LSLIQ) = rholiq
289	rhopart(INDX_LSICE) = rhoice
290	rhopart(INDX_CVLIQ) = rholiq
291	rhopart(INDX_CVICE) = rhoice
292
293	! LS and CONV Liquid water coefficients
294	polpart(INDX_LSLIQ,1:5) = polpartLSLIQ
295	polpart(INDX_CVLIQ,1:5) = polpartCVLIQ
296	! LS and CONV Ice water coefficients
297	if (ice_type .eq. 0) then
298	polpart(INDX_LSICE,1:5) = polpartLSICE0
299	polpart(INDX_CVICE,1:5) = polpartCVICE0
300	endif
301	if (ice_type .eq. 1) then
302	polpart(INDX_LSICE,1:5) = polpartLSICE1
303	polpart(INDX_CVICE,1:5) = polpartCVICE1
304	endif
305
306	! Effective radius particles:
307	rad_part(1:npoints,1:nlev,INDX_LSLIQ) = ls_radliq(1:npoints,1:nlev)
308	rad_part(1:npoints,1:nlev,INDX_LSICE) = ls_radice(1:npoints,1:nlev)
309	rad_part(1:npoints,1:nlev,INDX_CVLIQ) = cv_radliq(1:npoints,1:nlev)
310	rad_part(1:npoints,1:nlev,INDX_CVICE) = cv_radice(1:npoints,1:nlev)
311	rad_part(1:npoints,1:nlev,1:npart) = MAX(rad_part(1:npoints,1:nlev,1:npart),0._wp)
312	rad_part(1:npoints,1:nlev,1:npart) = MIN(rad_part(1:npoints,1:nlev,1:npart),70.0e-6_wp)
313
314	! Density (clear-sky air)
315	rhoair(1:npoints,1:nlev) = pres(1:npoints,1:nlev)/(rd*temp(1:npoints,1:nlev))
316
317	! Altitude at half pressure levels:
318	zheight(1:npoints,nlev+1) = 0._wp
319	do k=nlev,1,-1
320	zheight(1:npoints,k) = zheight(1:npoints,k+1) &
321	-(presf(1:npoints,k)-presf(1:npoints,k+1))/(rhoair(1:npoints,k)*grav)
322	enddo
323
324	! ##############################################################################
325	! *) Molecular alpha, beta and optical thickness
326	! ##############################################################################
327
328	beta_mol(1:npoints,1:nlev) = pres(1:npoints,1:nlev)/km/temp(1:npoints,1:nlev)*Cmol
329	alpha_mol(1:npoints,1:nlev) = 8._wppi/3._wp beta_mol(1:npoints,1:nlev)
330
331	! Optical thickness of each layer (molecular)
332	tau_mol(1:npoints,1:nlev) = alpha_mol(1:npoints,1:nlev)*(zheight(1:npoints,1:nlev)-&
333	zheight(1:npoints,2:nlev+1))
334
335	! Optical thickness from TOA to layer k (molecular)
336	DO k = 2,nlev
337	tau_mol(1:npoints,k) = tau_mol(1:npoints,k) + tau_mol(1:npoints,k-1)
338	ENDDO
339
340	betatot (1:npoints,1:ncolumns,1:nlev) = spread(beta_mol(1:npoints,1:nlev), dim=2, NCOPIES=ncolumns)
341	tautot (1:npoints,1:ncolumns,1:nlev) = spread(tau_mol (1:npoints,1:nlev), dim=2, NCOPIES=ncolumns)
342	betatot_liq(1:npoints,1:ncolumns,1:nlev) = betatot(1:npoints,1:ncolumns,1:nlev)
343	betatot_ice(1:npoints,1:ncolumns,1:nlev) = betatot(1:npoints,1:ncolumns,1:nlev)
344	tautot_liq (1:npoints,1:ncolumns,1:nlev) = tautot(1:npoints,1:ncolumns,1:nlev)
345	tautot_ice (1:npoints,1:ncolumns,1:nlev) = tautot(1:npoints,1:ncolumns,1:nlev)
346
347	! ##############################################################################
348	! *) Particles alpha, beta and optical thickness
349	! ##############################################################################
350	! Polynomials kp_lidar derived from Mie theory
351	do i = 1, npart
352	where (rad_part(1:npoints,1:nlev,i) .gt. 0.0)
353	kp_part(1:npoints,1:nlev,i) = &
354	polpart(i,1)(rad_part(1:npoints,1:nlev,i)1e6)**4 &
355	+ polpart(i,2)(rad_part(1:npoints,1:nlev,i)1e6)**3 &
356	+ polpart(i,3)(rad_part(1:npoints,1:nlev,i)1e6)**2 &
357	+ polpart(i,4)(rad_part(1:npoints,1:nlev,i)1e6) &
358	+ polpart(i,5)
359	elsewhere
360	kp_part(1:npoints,1:nlev,i) = 0._wp
361	endwhere
362	enddo
363
364	! Loop over all subcolumns
365	do icol=1,ncolumns
366	! ##############################################################################
367	! Mixing ratio particles in each subcolum
368	! ##############################################################################
369	qpart(1:npoints,1:nlev,INDX_LSLIQ) = q_lsliq(1:npoints,icol,1:nlev)
370	qpart(1:npoints,1:nlev,INDX_LSICE) = q_lsice(1:npoints,icol,1:nlev)
371	qpart(1:npoints,1:nlev,INDX_CVLIQ) = q_cvliq(1:npoints,icol,1:nlev)
372	qpart(1:npoints,1:nlev,INDX_CVICE) = q_cvice(1:npoints,icol,1:nlev)
373
374	! ##############################################################################
375	! Alpha and optical thickness (particles)
376	! ##############################################################################
377	! Alpha of particles in each subcolumn:
378	do i = 1, npart
379	where (rad_part(1:npoints,1:nlev,i) .gt. 0.0)
380	alpha_part(1:npoints,icol,1:nlev,i) = 3._wp/4._wp * Qscat &
381	* rhoair(1:npoints,1:nlev) * qpart(1:npoints,1:nlev,i) &
382	/ (rhopart(i) * rad_part(1:npoints,1:nlev,i) )
383	elsewhere
384	alpha_part(1:npoints,icol,1:nlev,i) = 0._wp
385	endwhere
386	enddo
387
388	! Optical thicknes
389	tau_part(1:npoints,icol,1:nlev,1:npart) = rdiffm * alpha_part(1:npoints,icol,1:nlev,1:npart)
390	do i = 1, npart
391	! Optical thickness of each layer (particles)
392	tau_part(1:npoints,icol,1:nlev,i) = tau_part(1:npoints,icol,1:nlev,i) &
393	& * (zheight(1:npoints,1:nlev)-zheight(1:npoints,2:nlev+1) )
394	! Optical thickness from TOA to layer k (particles)
395	do k=2,nlev
396	tau_part(1:npoints,icol,k,i) = tau_part(1:npoints,icol,k,i) + tau_part(1:npoints,icol,k-1,i)
397	enddo
398	enddo
399
400	! ##############################################################################
401	! Beta and optical thickness (total=molecular + particules)
402	! ##############################################################################
403
404	DO i = 1, npart
405	betatot(1:npoints,icol,1:nlev) = betatot(1:npoints,icol,1:nlev) + &
406	kp_part(1:npoints,1:nlev,i)*alpha_part(1:npoints,icol,1:nlev,i)
407	tautot(1:npoints,icol,1:nlev) = tautot(1:npoints,icol,1:nlev) + &
408	tau_part(1:npoints,icol,1:nlev,i)
409	ENDDO
410
411	! ##############################################################################
412	! Beta and optical thickness (liquid/ice)
413	! ##############################################################################
414	! Ice
415	betatot_ice(1:npoints,icol,1:nlev) = betatot_ice(1:npoints,icol,1:nlev)+ &
416	kp_part(1:npoints,1:nlev,INDX_LSICE)*alpha_part(1:npoints,icol,1:nlev,INDX_LSICE)+ &
417	kp_part(1:npoints,1:nlev,INDX_CVICE)*alpha_part(1:npoints,icol,1:nlev,INDX_CVICE)
418	tautot_ice(1:npoints,icol,1:nlev) = tautot_ice(1:npoints,icol,1:nlev) + &
419	tau_part(1:npoints,icol,1:nlev,INDX_LSICE) + &
420	tau_part(1:npoints,icol,1:nlev,INDX_CVICE)
421
422	! Liquid
423	betatot_liq(1:npoints,icol,1:nlev) = betatot_liq(1:npoints,icol,1:nlev)+ &
424	kp_part(1:npoints,1:nlev,INDX_LSLIQ)*alpha_part(1:npoints,icol,1:nlev,INDX_LSLIQ)+ &
425	kp_part(1:npoints,1:nlev,INDX_CVLIQ)*alpha_part(1:npoints,icol,1:nlev,INDX_CVLIQ)
426	tautot_liq(1:npoints,icol,1:nlev) = tautot_liq(1:npoints,icol,1:nlev) + &
427	tau_part(1:npoints,icol,1:nlev,INDX_LSLIQ) + &
428	tau_part(1:npoints,icol,1:nlev,INDX_CVLIQ)
429	enddo
430
431	! ##############################################################################
432	! Optical depths used by the PARASOL simulator
433	! ##############################################################################
434	tautot_S_liq(1:npoints,1:ncolumns) = 0._wp
435	tautot_S_ice(1:npoints,1:ncolumns) = 0._wp
436	do icol=1,ncolumns
437	tautot_S_liq(1:npoints,icol) = tautot_S_liq(1:npoints,icol)+tau_part(1:npoints,icol,nlev,1)+tau_part(1:npoints,icol,nlev,3)
438	tautot_S_ice(1:npoints,icol) = tautot_S_ice(1:npoints,icol)+tau_part(1:npoints,icol,nlev,2)+tau_part(1:npoints,icol,nlev,4)
439	enddo
440
441	end subroutine lidar_optics
442	end module cosp_optics

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