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simpleclouds.F @ 3026

Last change on this file since 3026 was 2378, checked in by lrossi, 5 years ago

MARS GCM

HDO
Correction of an error in newstart for inihdo.
Other minor corrections for HDO cycle.
Transition from fractionation coefficients from Merlivat et al. 1967 to Lamb et al. 2017

File size: 8.9 KB

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1	subroutine simpleclouds(ngrid,nlay,ptimestep,
2	& pplay,pzlay,pt,pdt,
3	& pq,pdq,pdqcloud,pdtcloud,
4	& nq,tau,rice)
5	USE updaterad
6	USE watersat_mod, ONLY: watersat
7	use tracer_mod, only: igcm_h2o_vap, igcm_h2o_ice,
8	& igcm_hdo_vap, igcm_hdo_ice,
9	& qperemin
10	USE comcstfi_h
11	use dimradmars_mod, only: naerkind
12
13	implicit none
14	c------------------------------------------------------------------
15	c This routine is used to form clouds when a parcel of the GCM is
16	c saturated. It is a simplified scheme, and there is almost no
17	c microphysics involved. When the air is saturated, water-ice
18	c clouds form on a fraction of the dust particles, specified by
19	c the constant called "ccn_factor". There is no supersaturation,
20	c and no nucleation rates computed. A more accurate scheme can
21	c be found in the routine called "improvedclouds.F".
22
23	c Modif de zq si saturation dans l'atmosphere
24	c si zq(ig,l)> zqsat(ig,l) -> zq(ig,l)=zqsat(ig,l)
25	c Le test est effectue de bas en haut. L'eau condensee
26	c (si saturation) est remise dans la couche en dessous.
27	c L'eau condensee dans la couche du bas est deposee a la surface
28
29	c Authors: Franck Montmessin (water ice scheme)
30	c Francois Forget (changed nuclei density & outputs)
31	c Ehouarn Millour (sept.2008, tracers are now handled
32	c by name and not fixed index)
33	c J.-B. Madeleine (developed a single routine called
34	c simpleclouds.F, and corrected calculations
35	c of the typical CCN profile, Oct. 2011)
36	c------------------------------------------------------------------
37	#include "callkeys.h"
38
39	c------------------------------------------------------------------
40	c Arguments:
41	c ---------
42	c Inputs:
43	INTEGER ngrid,nlay
44	integer nq ! nombre de traceurs
45	REAL ptimestep ! pas de temps physique (s)
46	REAL pplay(ngrid,nlay) ! pression au milieu des couches (Pa)
47	REAL pzlay(ngrid,nlay) ! altitude at the middle of the layers
48	REAL pt(ngrid,nlay) ! temperature at the middle of the
49	! layers (K)
50	REAL pdt(ngrid,nlay) ! tendance temperature des autres
51	! param.
52	real pq(ngrid,nlay,nq) ! traceur (kg/kg)
53	real pdq(ngrid,nlay,nq) ! tendance avant condensation
54	! (kg/kg.s-1)
55	REAL tau(ngrid,naerkind) ! Column dust optical depth at each point
56
57	c Output:
58	REAL rice(ngrid,nlay) ! Ice mass mean radius (m)
59	! (r_c in montmessin_2004)
60	real pdqcloud(ngrid,nlay,nq) ! tendance de la condensation
61	! H2O(kg/kg.s-1)
62	REAL pdtcloud(ngrid,nlay) ! tendance temperature due
63	! a la chaleur latente
64
65	c------------------------------------------------------------------
66	c Local variables:
67
68	REAL rhocloud(ngrid,nlay) ! Cloud density (kg.m-3)
69
70	INTEGER ig,l
71
72	REAL zq(ngrid,nlay,nq) ! local value of tracers
73	REAL zq0(ngrid,nlay,nq) ! local initial value of tracers
74	REAL zt(ngrid,nlay) ! local value of temperature
75	REAL zqsat(ngrid,nlay) ! saturation
76	REAL*8 dzq ! masse de glace echangee (kg/kg)
77	REAL lw !Latent heat of sublimation (J.kg-1)
78	REAL,PARAMETER :: To=273.15 ! reference temperature, T=273.15 K
79	real rdusttyp(ngrid,nlay) ! Typical dust geom. mean radius (m)
80	REAL ccntyp(ngrid,nlay)
81	! Typical dust number density (#/kg)
82	REAL alpha_c(ngrid,nlay) !!MARGAUX: alpha_c as a spatial variable
83
84	c CCN reduction factor
85	c REAL, PARAMETER :: ccn_factor = 4.5 !! comme TESTS_JB // 1. avant
86	REAL DoH_vap(ngrid,nlay)
87	REAL DoH_ice(ngrid,nlay)
88	c-----------------------------------------------------------------------
89	c 1. initialisation
90	c -----------------
91
92	c On "update" la valeur de q(nq) (water vapor) et temperature.
93	c On effectue qqes calculs preliminaires sur les couches :
94
95	do l=1,nlay
96	do ig=1,ngrid
97	zq(ig,l,igcm_h2o_vap)=
98	& pq(ig,l,igcm_h2o_vap)+pdq(ig,l,igcm_h2o_vap)*ptimestep
99	zq(ig,l,igcm_h2o_vap)=max(zq(ig,l,igcm_h2o_vap),1.E-30) ! FF 12/2004
100	zq0(ig,l,igcm_h2o_vap)=zq(ig,l,igcm_h2o_vap)
101	zt(ig,l)=pt(ig,l)+ pdt(ig,l)*ptimestep
102
103	zq(ig,l,igcm_h2o_ice)=
104	& pq(ig,l,igcm_h2o_ice)+pdq(ig,l,igcm_h2o_ice)*ptimestep
105	zq(ig,l,igcm_h2o_ice)=max(zq(ig,l,igcm_h2o_ice),0.) ! FF 12/2004
106	zq0(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice)
107
108	if (hdo) then
109	zq(ig,l,igcm_hdo_vap)=
110	& pq(ig,l,igcm_hdo_vap)+pdq(ig,l,igcm_hdo_vap)*ptimestep
111	zq(ig,l,igcm_hdo_vap)=max(zq(ig,l,igcm_hdo_vap),1e-30) ! FF 12/2004
112	zq0(ig,l,igcm_hdo_vap)=zq(ig,l,igcm_hdo_vap)
113
114	zq(ig,l,igcm_hdo_ice)=
115	& pq(ig,l,igcm_hdo_ice)+pdq(ig,l,igcm_hdo_ice)*ptimestep
116	zq(ig,l,igcm_hdo_ice)=max(zq(ig,l,igcm_hdo_ice),1e-30) ! FF 12/2004
117	zq0(ig,l,igcm_hdo_ice)=zq(ig,l,igcm_hdo_ice)
118
119	endif !hdo
120	enddo
121	enddo
122
123	pdqcloud(1:ngrid,1:nlay,1:nq)=0
124	pdtcloud(1:ngrid,1:nlay)=0
125
126	alpha_c(1:ngrid,1:nlay)=0.
127
128	c ----------------------------------------------
129	c
130	c Rapport de melange a saturation dans la couche l : -------
131	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
132
133	call watersat(ngrid*nlay,zt,pplay,zqsat)
134
135	c taux de condensation (kg/kg/s-1) dans les differentes couches
136	c ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
137
138	do l=1,nlay
139	do ig=1,ngrid
140
141	if (zq(ig,l,igcm_h2o_vap).ge.zqsat(ig,l))then ! Condensation
142	dzq=zq(ig,l,igcm_h2o_vap)-zqsat(ig,l)
143
144	elseif(zq(ig,l,igcm_h2o_vap).lt.zqsat(ig,l))then ! Sublimation
145	dzq=-min(zqsat(ig,l)-zq(ig,l,igcm_h2o_vap),
146	& zq(ig,l,igcm_h2o_ice))
147	endif
148
149	c Water Mass change
150	c ~~~~~~~~~~~~~~~~~
151	zq(ig,l,igcm_h2o_ice)=zq(ig,l,igcm_h2o_ice)+dzq
152	zq(ig,l,igcm_h2o_vap)=zq(ig,l,igcm_h2o_vap)-dzq
153
154	enddo ! of do ig=1,ngrid
155	enddo ! of do l=1,nlay
156
157
158	c Tendance finale
159	c ~~~~~~~~~~~~~~~
160	do l=1, nlay
161	do ig=1,ngrid
162	pdqcloud(ig,l,igcm_h2o_vap)=(zq(ig,l,igcm_h2o_vap)
163	& -zq0(ig,l,igcm_h2o_vap))/ptimestep
164	pdqcloud(ig,l,igcm_h2o_ice) =
165	& (zq(ig,l,igcm_h2o_ice) - zq0(ig,l,igcm_h2o_ice))/ptimestep
166
167	lw=(2834.3-0.28(zt(ig,l)-To)-0.004(zt(ig,l)-To)*2)1.e+3
168	pdtcloud(ig,l)=-pdqcloud(ig,l,igcm_h2o_vap)*lw/cpp
169
170	if (hdo) then
171	if (pdqcloud(ig,l,igcm_h2o_ice).gt.0.0) then !condens
172
173	if (hdofrac) then ! do we use fractionation?
174	c alpha_c(ig,l) = exp(16288./zt(ig,l)**2.-9.34d-2)
175	alpha_c(ig,l) = exp(13525./zt(ig,l)**2.-5.59d-2) !Lamb
176	else
177	alpha_c(ig,l) = 1.d0
178	endif
179
180	if (zq0(ig,l,igcm_h2o_vap).gt.qperemin) then
181	pdqcloud(ig,l,igcm_hdo_ice)=
182	& pdqcloud(ig,l,igcm_h2o_ice)alpha_c(ig,l)
183	& ( zq0(ig,l,igcm_hdo_vap)
184	& /zq0(ig,l,igcm_h2o_vap) )
185	else
186	pdqcloud(ig,l,igcm_hdo_ice)= 0.0
187	endif
188
189	pdqcloud(ig,l,igcm_hdo_ice) =
190	& min(pdqcloud(ig,l,igcm_hdo_ice),
191	& zq0(ig,l,igcm_hdo_vap)/ptimestep)
192
193	pdqcloud(ig,l,igcm_hdo_vap)=
194	& -pdqcloud(ig,l,igcm_hdo_ice)
195
196	else ! sublimation
197
198	if (zq0(ig,l,igcm_h2o_ice).gt.qperemin) then
199	pdqcloud(ig,l,igcm_hdo_ice)=
200	& pdqcloud(ig,l,igcm_h2o_ice)*
201	& ( zq0(ig,l,igcm_hdo_ice)
202	& /zq0(ig,l,igcm_h2o_ice) )
203	else
204	pdqcloud(ig,l,igcm_hdo_ice)= 0.
205	endif
206
207	pdqcloud(ig,l,igcm_hdo_ice) =
208	& max(pdqcloud(ig,l,igcm_hdo_ice),
209	& -zq0(ig,l,igcm_hdo_ice)/ptimestep)
210
211	pdqcloud(ig,l,igcm_hdo_vap)=
212	& -pdqcloud(ig,l,igcm_hdo_ice)
213
214	endif ! condensation/sublimation
215
216	endif ! hdo
217
218	enddo ! of do ig=1,ngrid
219	enddo ! of do l=1,nlay
220
221	c ice crystal radius
222	do l=1, nlay
223	do ig=1,ngrid
224	call updaterice_typ(zq(ig,l,igcm_h2o_ice),
225	& tau(ig,1),pzlay(ig,l),rice(ig,l))
226	end do
227	end do
228
229	c if (hdo) then
230	c CALL WRITEDIAGFI(ngrid,'alpha_c',
231	c & 'alpha_c',
232	c & ' ',3,alpha_c)
233	c endif !hdo
234	c------------------------------------------------------------------
235	return
236	end

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