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newmicro.F @ 1325

Last change on this file since 1325 was 634, checked in by Laurent Fairhead, 20 years ago
Modifications faites à la physique pour la rendre parallele YM Une branche de travail LMDZ4_par_0 a été créée provisoirement afin de tester les modifs pleinement avant leurs inclusions dans le tronc principal LF
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1	!
2	! $Header$
3	!
4	SUBROUTINE newmicro (paprs, pplay,ok_newmicro,
5	. t, pqlwp, pclc, pcltau, pclemi,
6	. pch, pcl, pcm, pct, pctlwp,
7	s xflwp, xfiwp, xflwc, xfiwc,
8	e ok_aie,
9	e sulfate, sulfate_pi,
10	e bl95_b0, bl95_b1,
11	s cldtaupi, re, fl)
12	USE dimphy
13	IMPLICIT none
14	c======================================================================
15	c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910
16	c Objet: Calculer epaisseur optique et emmissivite des nuages
17	c======================================================================
18	c Arguments:
19	c t-------input-R-temperature
20	c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg)
21	c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1)
22	c
23	c ok_aie--input-L-apply aerosol indirect effect or not
24	c sulfate-input-R-sulfate aerosol mass concentration [um/m^3]
25	c sulfate_pi-input-R-dito, pre-industrial value
26	c bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land)
27	c bl95_b1-input-R-a parameter, may be varied for tests ( -"- )
28	c
29	c cldtaupi-output-R-pre-industrial value of cloud optical thickness,
30	c needed for the diagnostics of the aerosol indirect
31	c radiative forcing (see radlwsw)
32	c re------output-R-Cloud droplet effective radius multiplied by fl [um]
33	c fl------output-R-Denominator to re, introduced to avoid problems in
34	c the averaging of the output. fl is the fraction of liquid
35	c water clouds within a grid cell
36	c pcltau--output-R-epaisseur optique des nuages
37	c pclemi--output-R-emissivite des nuages (0 a 1)
38	c======================================================================
39	C
40	#include "YOMCST.h"
41	c
42	cym#include "dimensions.h"
43	cym#include "dimphy.h"
44	#include "nuage.h"
45	REAL paprs(klon,klev+1), pplay(klon,klev)
46	REAL t(klon,klev)
47	c
48	REAL pclc(klon,klev)
49	REAL pqlwp(klon,klev)
50	REAL pcltau(klon,klev), pclemi(klon,klev)
51	c
52	REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon)
53	c
54	LOGICAL lo
55	c
56	REAL cetahb, cetamb
57	PARAMETER (cetahb = 0.45, cetamb = 0.80)
58	C
59	INTEGER i, k
60	cIM: 091003 REAL zflwp, zradef, zfice, zmsac
61	REAL zflwp(klon), zradef, zfice, zmsac
62	cIM: 091003 rajout
63	REAL xflwp(klon), xfiwp(klon)
64	REAL xflwc(klon,klev), xfiwc(klon,klev)
65	c
66	REAL radius, rad_chaud
67	cc PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0)
68	ccc PARAMETER (rad_chaud=15.0, rad_froid=35.0)
69	c sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0)
70	REAL coef, coef_froi, coef_chau
71	PARAMETER (coef_chau=0.13, coef_froi=0.09)
72	REAL seuil_neb, t_glace
73	PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0)
74	INTEGER nexpo ! exponentiel pour glace/eau
75	PARAMETER (nexpo=6)
76	ccc PARAMETER (nexpo=1)
77
78	c -- sb:
79	logical ok_newmicro
80	c parameter (ok_newmicro=.FALSE.)
81	cIM: 091003 real rel, tc, rei, zfiwp
82	real rel, tc, rei, zfiwp(klon)
83	real k_liq, k_ice0, k_ice, DF
84	parameter (k_liq=0.0903, k_ice0=0.005) ! units=m2/g
85	parameter (DF=1.66) ! diffusivity factor
86	c sb --
87	cjq for the aerosol indirect effect
88	cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003
89	cjq
90	LOGICAL ok_aie ! Apply AIE or not?
91	LOGICAL ok_a1lwpdep ! a1 LWP dependent?
92
93	REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3]
94	REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3]
95	REAL re(klon, klev) ! cloud droplet effective radius [um]
96	REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value)
97	REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value)
98	REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value)
99
100	REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell)
101
102	REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula
103
104	REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag
105	cjq-end
106	c
107	c Calculer l'epaisseur optique et l'emmissivite des nuages
108	c
109	cIM inversion des DO
110	DO i = 1, klon
111	xflwp(i)=0.
112	xfiwp(i)=0.
113	c!CDIR NOVECTOR
114	DO k = 1, klev
115	c
116	xflwc(i,k)=0.
117	xfiwc(i,k)=0.
118	c
119	rad_chaud = rad_chau1
120	IF (k.LE.3) rad_chaud = rad_chau2
121	pclc(i,k) = MAX(pclc(i,k), seuil_neb)
122	zflwp(i) = 1000.*pqlwp(i,k)/RG/pclc(i,k)
123	. *(paprs(i,k)-paprs(i,k+1))
124	zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace)
125	zfice = MIN(MAX(zfice,0.0),1.0)
126	zfice = zfice**nexpo
127	radius = rad_chaud * (1.-zfice) + rad_froid * zfice
128	coef = coef_chau * (1.-zfice) + coef_froi * zfice
129	pcltau(i,k) = 3.0/2.0 * zflwp(i) / radius
130	pclemi(i,k) = 1.0 - EXP( - coef * zflwp(i))
131
132	if (ok_newmicro) then
133
134	c -- liquid/ice cloud water paths:
135
136	zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace)
137	zfice = MIN(MAX(zfice,0.0),1.0)
138
139	zflwp(i) = 1000.(1.-zfice)pqlwp(i,k)/pclc(i,k)
140	: *(paprs(i,k)-paprs(i,k+1))/RG
141	zfiwp(i) = 1000.zficepqlwp(i,k)/pclc(i,k)
142	: *(paprs(i,k)-paprs(i,k+1))/RG
143
144	xflwp(i) = xflwp(i)+ (1.-zfice)*pqlwp(i,k)
145	: *(paprs(i,k)-paprs(i,k+1))/RG
146	xfiwp(i) = xfiwp(i)+ zfice*pqlwp(i,k)
147	: *(paprs(i,k)-paprs(i,k+1))/RG
148
149	cIM Total Liquid/Ice water content
150	xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k)
151	xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k)
152	cIM In-Cloud Liquid/Ice water content
153	c xflwc(i,k) = xflwc(i,k)+(1.-zfice)*pqlwp(i,k)/pclc(i,k)
154	c xfiwc(i,k) = xfiwc(i,k)+zfice*pqlwp(i,k)/pclc(i,k)
155
156	c -- effective cloud droplet radius (microns):
157
158	c for liquid water clouds:
159	IF (ok_aie) THEN
160	! Formula "D" of Boucher and Lohmann, Tellus, 1995
161	!
162	cdnc(i,k) = 10.*(bl95_b0+bl95_b1
163	. log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3
164	! Cloud droplet number concentration (CDNC) is restricted
165	! to be within [20, 1000 cm^3]
166	!
167	cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k)))
168	!
169	!
170	cdnc_pi(i,k) = 10.*(bl95_b0+bl95_b1
171	. log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3
172	cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k)))
173	!
174	!
175	! air density: pplay(i,k) / (RD * zT(i,k))
176	! factor 1.1: derive effective radius from volume-mean radius
177	! factor 1000 is the water density
178	! _chaud means that this is the CDR for liquid water clouds
179	!
180	rad_chaud =
181	. 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) )
182	. / (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.)
183	!
184	! Convert to um. CDR shall be at least 3 um.
185	!
186	c rad_chaud = MAX(rad_chaud*1.e6, 3.)
187	rad_chaud = MAX(rad_chaud*1.e6, 5.)
188
189	! Pre-industrial cloud opt thickness
190	!
191	! "radius" is calculated as rad_chaud above (plus the
192	! ice cloud contribution) but using cdnc_pi instead of
193	! cdnc.
194	radius =
195	. 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) )
196	. / (4./3. * RPI * 1000. * cdnc_pi(i,k)) )**(1./3.)
197	radius = MAX(radius*1.e6, 5.)
198
199	tc = t(i,k)-273.15
200	rei = 0.71*tc + 61.29
201	if (tc.le.-81.4) rei = 3.5
202	if (zflwp(i).eq.0.) radius = 1.
203	if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1.
204	cldtaupi(i,k) = 3.0/2.0 * zflwp(i) / radius
205	. + zfiwp(i) * (3.448e-03 + 2.431/rei)
206	ENDIF ! ok_aie
207	! For output diagnostics
208	!
209	! Cloud droplet effective radius [um]
210	!
211	! we multiply here with f * xl (fraction of liquid water
212	! clouds in the grid cell) to avoid problems in the
213	! averaging of the output.
214	! In the output of IOIPSL, derive the real cloud droplet
215	! effective radius as re/fl
216	!
217	fl(i,k) = pclc(i,k)*(1.-zfice)
218	re(i,k) = rad_chaud*fl(i,k)
219
220	c-jq end
221
222	rel = rad_chaud
223	c for ice clouds: as a function of the ambiant temperature
224	c [formula used by Iacobellis and Somerville (2000), with an
225	c asymptotical value of 3.5 microns at T<-81.4 C added to be
226	c consistent with observations of Heymsfield et al. 1986]:
227	tc = t(i,k)-273.15
228	rei = 0.71*tc + 61.29
229	if (tc.le.-81.4) rei = 3.5
230
231	c -- cloud optical thickness :
232
233	c [for liquid clouds, traditional formula,
234	c for ice clouds, Ebert & Curry (1992)]
235
236	if (zflwp(i).eq.0.) rel = 1.
237	if (zfiwp(i).eq.0. .or. rei.le.0.) rei = 1.
238	pcltau(i,k) = 3.0/2.0 * ( zflwp(i)/rel )
239	. + zfiwp(i) * (3.448e-03 + 2.431/rei)
240
241	c -- cloud infrared emissivity:
242
243	c [the broadband infrared absorption coefficient is parameterized
244	c as a function of the effective cld droplet radius]
245
246	c Ebert and Curry (1992) formula as used by Kiehl & Zender (1995):
247	k_ice = k_ice0 + 1.0/rei
248
249	pclemi(i,k) = 1.0
250	. - EXP( - coef_chauzflwp(i) - DFk_ice*zfiwp(i) )
251
252	endif ! ok_newmicro
253
254	lo = (pclc(i,k) .LE. seuil_neb)
255	IF (lo) pclc(i,k) = 0.0
256	IF (lo) pcltau(i,k) = 0.0
257	IF (lo) pclemi(i,k) = 0.0
258
259	IF (lo) cldtaupi(i,k) = 0.0
260	IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k)
261	ENDDO
262	ENDDO
263	ccc DO k = 1, klev
264	ccc DO i = 1, klon
265	ccc t(i,k) = t(i,k)
266	ccc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) )
267	ccc lo = pclc(i,k) .GT. (2.*1.e-5)
268	ccc zflwp = pqlwp(i,k)1000.(paprs(i,k)-paprs(i,k+1))
269	ccc . /(rg*pclc(i,k))
270	ccc zradef = 10.0 + (1.-sigs(k))*45.0
271	ccc pcltau(i,k) = 1.5 * zflwp / zradef
272	ccc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0)
273	ccc zmsac = 0.13(1.0-zfice) + 0.08zfice
274	ccc pclemi(i,k) = 1.-EXP(-zmsac*zflwp)
275	ccc if (.NOT.lo) pclc(i,k) = 0.0
276	ccc if (.NOT.lo) pcltau(i,k) = 0.0
277	ccc if (.NOT.lo) pclemi(i,k) = 0.0
278	ccc ENDDO
279	ccc ENDDO
280	cccccc print*, 'pas de nuage dans le rayonnement'
281	cccccc DO k = 1, klev
282	cccccc DO i = 1, klon
283	cccccc pclc(i,k) = 0.0
284	cccccc pcltau(i,k) = 0.0
285	cccccc pclemi(i,k) = 0.0
286	cccccc ENDDO
287	cccccc ENDDO
288	C
289	C COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS
290	C
291	DO i = 1, klon
292	pct(i)=1.0
293	pch(i)=1.0
294	pcm(i) = 1.0
295	pcl(i) = 1.0
296	pctlwp(i) = 0.0
297	ENDDO
298	C
299	DO k = klev, 1, -1
300	DO i = 1, klon
301	pctlwp(i) = pctlwp(i)
302	. + pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG
303	pct(i) = pct(i)*(1.0-pclc(i,k))
304	if (pplay(i,k).LE.cetahb*paprs(i,1))
305	. pch(i) = pch(i)*(1.0-pclc(i,k))
306	if (pplay(i,k).GT.cetahb*paprs(i,1) .AND.
307	. pplay(i,k).LE.cetamb*paprs(i,1))
308	. pcm(i) = pcm(i)*(1.0-pclc(i,k))
309	if (pplay(i,k).GT.cetamb*paprs(i,1))
310	. pcl(i) = pcl(i)*(1.0-pclc(i,k))
311	ENDDO
312	ENDDO
313	C
314	DO i = 1, klon
315	pct(i)=1.-pct(i)
316	pch(i)=1.-pch(i)
317	pcm(i)=1.-pcm(i)
318	pcl(i)=1.-pcl(i)
319	ENDDO
320	C
321	RETURN
322	END

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