Context Navigation

newmicro.F @ 2303

Last change on this file since 2303 was 535, checked in by lmdzadmin, 20 years ago
Correction pour diagnostiques JLD LF
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 11.4 KB

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

Note: See TracBrowser for help on using the repository browser.

Download in other formats:

Original Format