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nuage.F @ 648

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1	!
2	! $Header$
3	!
4	SUBROUTINE nuage (paprs, pplay,
5	. t, pqlwp, pclc, pcltau, pclemi,
6	. pch, pcl, pcm, pct, pctlwp,
7	e ok_aie,
8	e sulfate, sulfate_pi,
9	e bl95_b0, bl95_b1,
10	s cldtaupi, re, fl)
11	IMPLICIT none
12	c======================================================================
13	c Auteur(s): Z.X. Li (LMD/CNRS) date: 19930910
14	c Objet: Calculer epaisseur optique et emmissivite des nuages
15	c======================================================================
16	c Arguments:
17	c t-------input-R-temperature
18	c pqlwp---input-R-eau liquide nuageuse dans l'atmosphere (kg/kg)
19	c pclc----input-R-couverture nuageuse pour le rayonnement (0 a 1)
20	c ok_aie--input-L-apply aerosol indirect effect or not
21	c sulfate-input-R-sulfate aerosol mass concentration [um/m^3]
22	c sulfate_pi-input-R-dito, pre-industrial value
23	c bl95_b0-input-R-a parameter, may be varied for tests (s-sea, l-land)
24	c bl95_b1-input-R-a parameter, may be varied for tests ( -"- )
25	c
26	c cldtaupi-output-R-pre-industrial value of cloud optical thickness,
27	c needed for the diagnostics of the aerosol indirect
28	c radiative forcing (see radlwsw)
29	c re------output-R-Cloud droplet effective radius multiplied by fl [um]
30	c fl------output-R-Denominator to re, introduced to avoid problems in
31	c the averaging of the output. fl is the fraction of liquid
32	c water clouds within a grid cell
33	c
34	c pcltau--output-R-epaisseur optique des nuages
35	c pclemi--output-R-emissivite des nuages (0 a 1)
36	c======================================================================
37	C
38	#include "YOMCST.h"
39	c
40	#include "dimensions.h"
41	#include "dimphy.h"
42	REAL paprs(klon,klev+1), pplay(klon,klev)
43	REAL t(klon,klev)
44	c
45	REAL pclc(klon,klev)
46	REAL pqlwp(klon,klev)
47	REAL pcltau(klon,klev), pclemi(klon,klev)
48	c
49	REAL pct(klon), pctlwp(klon), pch(klon), pcl(klon), pcm(klon)
50	c
51	LOGICAL lo
52	c
53	REAL cetahb, cetamb
54	PARAMETER (cetahb = 0.45, cetamb = 0.80)
55	C
56	INTEGER i, k
57	REAL zflwp, zradef, zfice, zmsac
58	c
59	REAL radius, rad_froid, rad_chaud, rad_chau1, rad_chau2
60	PARAMETER (rad_chau1=13.0, rad_chau2=9.0, rad_froid=35.0)
61	ccc PARAMETER (rad_chaud=15.0, rad_froid=35.0)
62	c sintex initial PARAMETER (rad_chaud=10.0, rad_froid=30.0)
63	REAL coef, coef_froi, coef_chau
64	PARAMETER (coef_chau=0.13, coef_froi=0.09)
65	REAL seuil_neb, t_glace
66	PARAMETER (seuil_neb=0.001, t_glace=273.0-15.0)
67	INTEGER nexpo ! exponentiel pour glace/eau
68	PARAMETER (nexpo=6)
69
70	cjq for the aerosol indirect effect
71	cjq introduced by Johannes Quaas (quaas@lmd.jussieu.fr), 27/11/2003
72	cjq
73	LOGICAL ok_aie ! Apply AIE or not?
74
75	REAL sulfate(klon, klev) ! sulfate aerosol mass concentration [ug m-3]
76	REAL cdnc(klon, klev) ! cloud droplet number concentration [m-3]
77	REAL re(klon, klev) ! cloud droplet effective radius [um]
78	REAL sulfate_pi(klon, klev) ! sulfate aerosol mass concentration [ug m-3] (pre-industrial value)
79	REAL cdnc_pi(klon, klev) ! cloud droplet number concentration [m-3] (pi value)
80	REAL re_pi(klon, klev) ! cloud droplet effective radius [um] (pi value)
81
82	REAL fl(klon, klev) ! xliq * rneb (denominator to re; fraction of liquid water clouds within the grid cell)
83
84	REAL bl95_b0, bl95_b1 ! Parameter in B&L 95-Formula
85
86	REAL cldtaupi(klon, klev) ! pre-industrial cloud opt thickness for diag
87	cjq-end
88
89	ccc PARAMETER (nexpo=1)
90	c
91	c Calculer l'epaisseur optique et l'emmissivite des nuages
92	c
93	DO k = 1, klev
94	DO i = 1, klon
95	rad_chaud = rad_chau1
96	IF (k.LE.3) rad_chaud = rad_chau2
97
98	pclc(i,k) = MAX(pclc(i,k), seuil_neb)
99	zflwp = 1000.*pqlwp(i,k)/RG/pclc(i,k)
100	. *(paprs(i,k)-paprs(i,k+1))
101	zfice = 1.0 - (t(i,k)-t_glace) / (273.13-t_glace)
102	zfice = MIN(MAX(zfice,0.0),1.0)
103	zfice = zfice**nexpo
104
105	IF (ok_aie) THEN
106	! Formula "D" of Boucher and Lohmann, Tellus, 1995
107	!
108	cdnc(i,k) = 10.*(bl95_b0+bl95_b1
109	. log(MAX(sulfate(i,k),1.e-4))/log(10.))*1.e6 !-m-3
110	! Cloud droplet number concentration (CDNC) is restricted
111	! to be within [20, 1000 cm^3]
112	!
113	cdnc(i,k)=MIN(1000.e6,MAX(20.e6,cdnc(i,k)))
114	cdnc_pi(i,k) = 10.*(bl95_b0+bl95_b1
115	. log(MAX(sulfate_pi(i,k),1.e-4))/log(10.))*1.e6 !-m-3
116	cdnc_pi(i,k)=MIN(1000.e6,MAX(20.e6,cdnc_pi(i,k)))
117	!
118	!
119	! air density: pplay(i,k) / (RD * zT(i,k))
120	! factor 1.1: derive effective radius from volume-mean radius
121	! factor 1000 is the water density
122	! _chaud means that this is the CDR for liquid water clouds
123	!
124	rad_chaud =
125	. 1.1 * ( (pqlwp(i,k) * pplay(i,k) / (RD * T(i,k)) )
126	. / (4./3. * RPI * 1000. * cdnc(i,k)) )**(1./3.)
127	!
128	! Convert to um. CDR shall be at least 3 um.
129	!
130	rad_chaud = MAX(rad_chaud*1.e6, 3.)
131
132	! For output diagnostics
133	!
134	! Cloud droplet effective radius [um]
135	!
136	! we multiply here with f * xl (fraction of liquid water
137	! clouds in the grid cell) to avoid problems in the
138	! averaging of the output.
139	! In the output of IOIPSL, derive the real cloud droplet
140	! effective radius as re/fl
141	!
142	fl(i,k) = pclc(i,k)*(1.-zfice)
143	re(i,k) = rad_chaud*fl(i,k)
144
145	! Pre-industrial cloud opt thickness
146	!
147	! "radius" is calculated as rad_chaud above (plus the
148	! ice cloud contribution) but using cdnc_pi instead of
149	! cdnc.
150	radius = MAX(1.1e6 * ( (pqlwp(i,k)pplay(i,k)/(RDT(i,k)))
151	. / (4./3.RPI1000.cdnc_pi(i,k)) )*(1./3.),
152	. 3.) * (1.-zfice) + rad_froid * zfice
153	cldtaupi(i,k) = 3.0/2.0 * zflwp / radius
154	.
155	ENDIF ! ok_aie
156
157	radius = rad_chaud * (1.-zfice) + rad_froid * zfice
158	coef = coef_chau * (1.-zfice) + coef_froi * zfice
159	pcltau(i,k) = 3.0/2.0 * zflwp / radius
160	pclemi(i,k) = 1.0 - EXP( - coef * zflwp)
161	lo = (pclc(i,k) .LE. seuil_neb)
162	IF (lo) pclc(i,k) = 0.0
163	IF (lo) pcltau(i,k) = 0.0
164	IF (lo) pclemi(i,k) = 0.0
165
166	IF (.NOT.ok_aie) cldtaupi(i,k)=pcltau(i,k)
167	ENDDO
168	ENDDO
169	ccc DO k = 1, klev
170	ccc DO i = 1, klon
171	ccc t(i,k) = t(i,k)
172	ccc pclc(i,k) = MAX( 1.e-5 , pclc(i,k) )
173	ccc lo = pclc(i,k) .GT. (2.*1.e-5)
174	ccc zflwp = pqlwp(i,k)1000.(paprs(i,k)-paprs(i,k+1))
175	ccc . /(rg*pclc(i,k))
176	ccc zradef = 10.0 + (1.-sigs(k))*45.0
177	ccc pcltau(i,k) = 1.5 * zflwp / zradef
178	ccc zfice=1.0-MIN(MAX((t(i,k)-263.)/(273.-263.),0.0),1.0)
179	ccc zmsac = 0.13(1.0-zfice) + 0.08zfice
180	ccc pclemi(i,k) = 1.-EXP(-zmsac*zflwp)
181	ccc if (.NOT.lo) pclc(i,k) = 0.0
182	ccc if (.NOT.lo) pcltau(i,k) = 0.0
183	ccc if (.NOT.lo) pclemi(i,k) = 0.0
184	ccc ENDDO
185	ccc ENDDO
186	cccccc print*, 'pas de nuage dans le rayonnement'
187	cccccc DO k = 1, klev
188	cccccc DO i = 1, klon
189	cccccc pclc(i,k) = 0.0
190	cccccc pcltau(i,k) = 0.0
191	cccccc pclemi(i,k) = 0.0
192	cccccc ENDDO
193	cccccc ENDDO
194	C
195	C COMPUTE CLOUD LIQUID PATH AND TOTAL CLOUDINESS
196	C
197	DO i = 1, klon
198	pct(i)=1.0
199	pch(i)=1.0
200	pcm(i) = 1.0
201	pcl(i) = 1.0
202	pctlwp(i) = 0.0
203	ENDDO
204	C
205	DO k = klev, 1, -1
206	DO i = 1, klon
207	pctlwp(i) = pctlwp(i)
208	. + pqlwp(i,k)*(paprs(i,k)-paprs(i,k+1))/RG
209	pct(i) = pct(i)*(1.0-pclc(i,k))
210	if (pplay(i,k).LE.cetahb*paprs(i,1))
211	. pch(i) = pch(i)*(1.0-pclc(i,k))
212	if (pplay(i,k).GT.cetahb*paprs(i,1) .AND.
213	. pplay(i,k).LE.cetamb*paprs(i,1))
214	. pcm(i) = pcm(i)*(1.0-pclc(i,k))
215	if (pplay(i,k).GT.cetamb*paprs(i,1))
216	. pcl(i) = pcl(i)*(1.0-pclc(i,k))
217	ENDDO
218	ENDDO
219	C
220	DO i = 1, klon
221	pct(i)=1.-pct(i)
222	pch(i)=1.-pch(i)
223	pcm(i)=1.-pcm(i)
224	pcl(i)=1.-pcl(i)
225	ENDDO
226	C
227	RETURN
228	END
229	SUBROUTINE diagcld1(paprs,pplay,rain,snow,kbot,ktop,
230	. diafra,dialiq)
231	IMPLICIT none
232	c
233	c Laurent Li (LMD/CNRS), le 12 octobre 1998
234	c (adaptation du code ECMWF)
235	c
236	c Dans certains cas, le schema pronostique des nuages n'est
237	c pas suffisament performant. On a donc besoin de diagnostiquer
238	c ces nuages. Je dois avouer que c'est une frustration.
239	c
240	#include "dimensions.h"
241	#include "dimphy.h"
242	#include "YOMCST.h"
243	c
244	c Arguments d'entree:
245	REAL paprs(klon,klev+1) ! pression (Pa) a inter-couche
246	REAL pplay(klon,klev) ! pression (Pa) au milieu de couche
247	REAL t(klon,klev) ! temperature (K)
248	REAL q(klon,klev) ! humidite specifique (Kg/Kg)
249	REAL rain(klon) ! pluie convective (kg/m2/s)
250	REAL snow(klon) ! neige convective (kg/m2/s)
251	INTEGER ktop(klon) ! sommet de la convection
252	INTEGER kbot(klon) ! bas de la convection
253	c
254	c Arguments de sortie:
255	REAL diafra(klon,klev) ! fraction nuageuse diagnostiquee
256	REAL dialiq(klon,klev) ! eau liquide nuageuse
257	c
258	c Constantes ajustables:
259	REAL CANVA, CANVB, CANVH
260	PARAMETER (CANVA=2.0, CANVB=0.3, CANVH=0.4)
261	REAL CCA, CCB, CCC
262	PARAMETER (CCA=0.125, CCB=1.5, CCC=0.8)
263	REAL CCFCT, CCSCAL
264	PARAMETER (CCFCT=0.400)
265	PARAMETER (CCSCAL=1.0E+11)
266	REAL CETAHB, CETAMB
267	PARAMETER (CETAHB=0.45, CETAMB=0.80)
268	REAL CCLWMR
269	PARAMETER (CCLWMR=1.E-04)
270	REAL ZEPSCR
271	PARAMETER (ZEPSCR=1.0E-10)
272	c
273	c Variables locales:
274	INTEGER i, k
275	REAL zcc(klon)
276	c
277	c Initialisation:
278	c
279	DO k = 1, klev
280	DO i = 1, klon
281	diafra(i,k) = 0.0
282	dialiq(i,k) = 0.0
283	ENDDO
284	ENDDO
285	c
286	DO i = 1, klon ! Calculer la fraction nuageuse
287	zcc(i) = 0.0
288	IF((rain(i)+snow(i)).GT.0.) THEN
289	zcc(i)= CCA * LOG(MAX(ZEPSCR,(rain(i)+snow(i))*CCSCAL))-CCB
290	zcc(i)= MIN(CCC,MAX(0.0,zcc(i)))
291	ENDIF
292	ENDDO
293	c
294	DO i = 1, klon ! pour traiter les enclumes
295	diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)),zcc(i)*CCFCT)
296	IF ((zcc(i).GE.CANVH) .AND.
297	. (pplay(i,ktop(i)).LE.CETAHB*paprs(i,1)))
298	. diafra(i,ktop(i)) = MAX(diafra(i,ktop(i)),
299	. MAX(zcc(i)CCFCT,CANVA(zcc(i)-CANVB)))
300	dialiq(i,ktop(i))=CCLWMR*diafra(i,ktop(i))
301	ENDDO
302	c
303	DO k = 1, klev ! nuages convectifs (sauf enclumes)
304	DO i = 1, klon
305	IF (k.LT.ktop(i) .AND. k.GE.kbot(i)) THEN
306	diafra(i,k)=MAX(diafra(i,k),zcc(i)*CCFCT)
307	dialiq(i,k)=CCLWMR*diafra(i,k)
308	ENDIF
309	ENDDO
310	ENDDO
311	c
312	RETURN
313	END
314	SUBROUTINE diagcld2(paprs,pplay,t,q, diafra,dialiq)
315	IMPLICIT none
316	c
317	#include "dimensions.h"
318	#include "dimphy.h"
319	#include "YOMCST.h"
320	c
321	c Arguments d'entree:
322	REAL paprs(klon,klev+1) ! pression (Pa) a inter-couche
323	REAL pplay(klon,klev) ! pression (Pa) au milieu de couche
324	REAL t(klon,klev) ! temperature (K)
325	REAL q(klon,klev) ! humidite specifique (Kg/Kg)
326	c
327	c Arguments de sortie:
328	REAL diafra(klon,klev) ! fraction nuageuse diagnostiquee
329	REAL dialiq(klon,klev) ! eau liquide nuageuse
330	c
331	REAL CETAMB
332	PARAMETER (CETAMB=0.80)
333	REAL CLOIA, CLOIB, CLOIC, CLOID
334	PARAMETER (CLOIA=1.0E+02, CLOIB=-10.00, CLOIC=-0.6, CLOID=5.0)
335	ccc PARAMETER (CLOIA=1.0E+02, CLOIB=-10.00, CLOIC=-0.9, CLOID=5.0)
336	REAL RGAMMAS
337	PARAMETER (RGAMMAS=0.05)
338	REAL CRHL
339	PARAMETER (CRHL=0.15)
340	ccc PARAMETER (CRHL=0.70)
341	REAL t_coup
342	PARAMETER (t_coup=234.0)
343	c
344	c Variables locales:
345	INTEGER i, k, kb, invb(klon)
346	REAL zqs, zrhb, zcll, zdthmin(klon), zdthdp
347	REAL zdelta, zcor
348	c
349	c Fonctions thermodynamiques:
350	#include "YOETHF.h"
351	#include "FCTTRE.h"
352	c
353	c Initialisation:
354	c
355	DO k = 1, klev
356	DO i = 1, klon
357	diafra(i,k) = 0.0
358	dialiq(i,k) = 0.0
359	ENDDO
360	ENDDO
361	c
362	DO i = 1, klon
363	invb(i) = klev
364	zdthmin(i)=0.0
365	ENDDO
366
367	DO k = 2, klev/2-1
368	DO i = 1, klon
369	zdthdp = (t(i,k)-t(i,k+1))/(pplay(i,k)-pplay(i,k+1))
370	. - RD * 0.5*(t(i,k)+t(i,k+1))/RCPD/paprs(i,k+1)
371	zdthdp = zdthdp * CLOIA
372	IF (pplay(i,k).GT.CETAMB*paprs(i,1) .AND.
373	. zdthdp.LT.zdthmin(i) ) THEN
374	zdthmin(i) = zdthdp
375	invb(i) = k
376	ENDIF
377	ENDDO
378	ENDDO
379
380	DO i = 1, klon
381	kb=invb(i)
382	IF (thermcep) THEN
383	zdelta=MAX(0.,SIGN(1.,RTT-t(i,kb)))
384	zqs= R2ES*FOEEW(t(i,kb),zdelta)/pplay(i,kb)
385	zqs=MIN(0.5,zqs)
386	zcor=1./(1.-RETV*zqs)
387	zqs=zqs*zcor
388	ELSE
389	IF (t(i,kb) .LT. t_coup) THEN
390	zqs = qsats(t(i,kb)) / pplay(i,kb)
391	ELSE
392	zqs = qsatl(t(i,kb)) / pplay(i,kb)
393	ENDIF
394	ENDIF
395	zcll = CLOIB * zdthmin(i) + CLOIC
396	zcll = MIN(1.0,MAX(0.0,zcll))
397	zrhb= q(i,kb)/zqs
398	IF (zcll.GT.0.0.AND.zrhb.LT.CRHL)
399	. zcll=zcll(1.-(CRHL-zrhb)CLOID)
400	zcll=MIN(1.0,MAX(0.0,zcll))
401	diafra(i,kb) = MAX(diafra(i,kb),zcll)
402	dialiq(i,kb)= diafra(i,kb) * RGAMMAS*zqs
403	ENDDO
404	c
405	RETURN
406	END

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