1 |
module stdlevvar_m |
2 |
|
3 |
IMPLICIT NONE |
4 |
|
5 |
contains |
6 |
|
7 |
SUBROUTINE stdlevvar(klon, knon, nsrf, zxli, u1, v1, t1, q1, z1, ts1, & |
8 |
qsurf, rugos, psol, pat1, t_2m, q_2m, t_10m, q_10m, u_10m, ustar) |
9 |
|
10 |
! From LMDZ4/libf/phylmd/stdlevvar.F90, version 1.3 2005/05/25 13:10:09 |
11 |
|
12 |
use coefcdrag_m, only: coefcdrag |
13 |
USE suphec_m, ONLY: rg, rkappa |
14 |
|
15 |
! Objet : calcul de la température et de l'humidité relative à 2 m |
16 |
! et du module du vent à 10 m à partir des relations de |
17 |
! Dyer-Businger et des équations de Louis. |
18 |
|
19 |
! Reference: Hess, Colman and McAvaney (1995) |
20 |
|
21 |
! Author: I. Musat, 01.07.2002 |
22 |
|
23 |
INTEGER, intent(in):: klon |
24 |
! dimension de la grille physique (= nb_pts_latitude X nb_pts_longitude) |
25 |
|
26 |
INTEGER, intent(in):: knon |
27 |
! knon----input-I- nombre de points pour un type de surface |
28 |
INTEGER, intent(in):: nsrf |
29 |
! nsrf----input-I- indice pour le type de surface; voir indicesol.inc |
30 |
LOGICAL, intent(in):: zxli |
31 |
! zxli----input-L- TRUE si calcul des cdrags selon Laurent Li |
32 |
REAL, dimension(klon), intent(in):: u1 |
33 |
! u1------input-R- vent zonal au 1er niveau du modele |
34 |
REAL, dimension(klon), intent(in):: v1 |
35 |
! v1------input-R- vent meridien au 1er niveau du modele |
36 |
REAL, dimension(klon), intent(in):: t1 |
37 |
! t1------input-R- temperature de l'air au 1er niveau du modele |
38 |
REAL, dimension(klon), intent(in):: q1 |
39 |
! q1------input-R- humidite relative au 1er niveau du modele |
40 |
REAL, dimension(klon), intent(in):: z1 |
41 |
! z1------input-R- geopotentiel au 1er niveau du modele |
42 |
REAL, dimension(klon), intent(in):: ts1 |
43 |
! ts1-----input-R- temperature de l'air a la surface |
44 |
REAL, dimension(klon), intent(in):: qsurf |
45 |
! qsurf---input-R- humidite relative a la surface |
46 |
REAL, dimension(klon), intent(in):: rugos |
47 |
! rugos---input-R- rugosite |
48 |
REAL, dimension(klon), intent(in):: psol |
49 |
! psol----input-R- pression au sol |
50 |
REAL, dimension(klon), intent(in):: pat1 |
51 |
! pat1----input-R- pression au 1er niveau du modele |
52 |
|
53 |
REAL, dimension(klon), intent(out):: t_2m |
54 |
! t_2m---output-R- temperature de l'air a 2m |
55 |
REAL, dimension(klon), intent(out):: q_2m |
56 |
! q_2m---output-R- humidite relative a 2m |
57 |
REAL, dimension(klon), intent(out):: t_10m |
58 |
! t_10m--output-R- temperature de l'air a 10m |
59 |
REAL, dimension(klon), intent(out):: q_10m |
60 |
! q_10m--output-R- humidite specifique a 10m |
61 |
REAL, dimension(klon), intent(out):: u_10m |
62 |
! u_10m--output-R- vitesse du vent a 10m |
63 |
REAL, intent(out):: ustar(klon) ! u* |
64 |
|
65 |
! Local: |
66 |
|
67 |
! RKAR : constante de von Karman |
68 |
REAL, PARAMETER:: RKAR=0.40 |
69 |
! niter : nombre iterations calcul "corrector" |
70 |
INTEGER, parameter:: niter=2, ncon=niter-1 |
71 |
|
72 |
! Variables locales |
73 |
INTEGER i, n |
74 |
REAL zref |
75 |
REAL, dimension(klon):: speed |
76 |
! tpot : temperature potentielle |
77 |
REAL, dimension(klon):: tpot |
78 |
REAL, dimension(klon):: zri1, cdran |
79 |
REAL cdram(klon), cdrah(klon) |
80 |
! ri1 : nb. de Richardson entre la surface --> la 1ere couche |
81 |
REAL, dimension(klon):: ri1 |
82 |
REAL, dimension(klon):: testar, qstar |
83 |
REAL, dimension(klon):: zdte, zdq |
84 |
! lmon : longueur de Monin-Obukhov selon Hess, Colman and McAvaney |
85 |
DOUBLE PRECISION, dimension(klon):: lmon |
86 |
DOUBLE PRECISION, parameter:: eps=1.0D-20 |
87 |
REAL, dimension(klon):: delu, delte, delq |
88 |
REAL, dimension(klon):: u_zref, te_zref, q_zref |
89 |
REAL, dimension(klon):: temp, pref |
90 |
LOGICAL okri |
91 |
REAL, dimension(klon):: u_zref_p, temp_p, q_zref_p |
92 |
!convertgence |
93 |
REAL, dimension(klon):: te_zref_con, q_zref_con |
94 |
REAL, dimension(klon):: u_zref_c, temp_c, q_zref_c |
95 |
REAL, dimension(klon):: ok_pred, ok_corr |
96 |
|
97 |
!------------------------------------------------------------------------- |
98 |
|
99 |
DO i=1, knon |
100 |
speed(i)=SQRT(u1(i)**2+v1(i)**2) |
101 |
ri1(i) = 0.0 |
102 |
ENDDO |
103 |
|
104 |
okri=.FALSE. |
105 |
CALL coefcdrag(klon, knon, nsrf, zxli, speed, t1, q1, z1, psol, ts1, & |
106 |
qsurf, rugos, okri, ri1, cdram, cdrah, cdran, zri1, pref) |
107 |
|
108 |
! Star variables |
109 |
|
110 |
DO i = 1, knon |
111 |
ri1(i) = zri1(i) |
112 |
tpot(i) = t1(i)* (psol(i)/pat1(i))**RKAPPA |
113 |
ustar(i) = sqrt(cdram(i) * speed(i) * speed(i)) |
114 |
zdte(i) = tpot(i) - ts1(i) |
115 |
zdq(i) = max(q1(i), 0.0) - max(qsurf(i), 0.0) |
116 |
|
117 |
zdte(i) = sign(max(abs(zdte(i)), 1.e-10), zdte(i)) |
118 |
|
119 |
testar(i) = (cdrah(i) * zdte(i) * speed(i))/ustar(i) |
120 |
qstar(i) = (cdrah(i) * zdq(i) * speed(i))/ustar(i) |
121 |
lmon(i) = (ustar(i) * ustar(i) * tpot(i))/ & |
122 |
(RKAR * RG * testar(i)) |
123 |
ENDDO |
124 |
|
125 |
! First aproximation of variables at zref |
126 |
zref = 2.0 |
127 |
CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
128 |
ts1, qsurf, rugos, lmon, & |
129 |
ustar, testar, qstar, zref, & |
130 |
delu, delte, delq) |
131 |
|
132 |
DO i = 1, knon |
133 |
u_zref(i) = delu(i) |
134 |
q_zref(i) = max(qsurf(i), 0.0) + delq(i) |
135 |
te_zref(i) = ts1(i) + delte(i) |
136 |
temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
137 |
q_zref_p(i) = q_zref(i) |
138 |
temp_p(i) = temp(i) |
139 |
ENDDO |
140 |
|
141 |
! Iteration of the variables at the reference level zref : |
142 |
! corrector calculation ; see Hess & McAvaney, 1995 |
143 |
|
144 |
DO n = 1, niter |
145 |
okri=.TRUE. |
146 |
CALL screenc(klon, knon, nsrf, zxli, & |
147 |
u_zref, temp, q_zref, zref, & |
148 |
ts1, qsurf, rugos, psol, & |
149 |
ustar, testar, qstar, okri, ri1, & |
150 |
pref, delu, delte, delq) |
151 |
|
152 |
DO i = 1, knon |
153 |
u_zref(i) = delu(i) |
154 |
q_zref(i) = delq(i) + max(qsurf(i), 0.0) |
155 |
te_zref(i) = delte(i) + ts1(i) |
156 |
|
157 |
! return to normal temperature |
158 |
|
159 |
temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
160 |
|
161 |
IF(n == ncon) THEN |
162 |
te_zref_con(i) = te_zref(i) |
163 |
q_zref_con(i) = q_zref(i) |
164 |
ENDIF |
165 |
ENDDO |
166 |
ENDDO |
167 |
|
168 |
! verifier le critere de convergence : 0.25% pour te_zref et 5% pour qe_zref |
169 |
|
170 |
DO i = 1, knon |
171 |
q_zref_c(i) = q_zref(i) |
172 |
temp_c(i) = temp(i) |
173 |
|
174 |
ok_pred(i)=0. |
175 |
ok_corr(i)=1. |
176 |
|
177 |
t_2m(i) = temp_p(i) * ok_pred(i) + temp_c(i) * ok_corr(i) |
178 |
q_2m(i) = q_zref_p(i) * ok_pred(i) + q_zref_c(i) * ok_corr(i) |
179 |
ENDDO |
180 |
|
181 |
! First aproximation of variables at zref |
182 |
|
183 |
zref = 10.0 |
184 |
CALL screenp(klon, knon, nsrf, speed, tpot, q1, & |
185 |
ts1, qsurf, rugos, lmon, & |
186 |
ustar, testar, qstar, zref, & |
187 |
delu, delte, delq) |
188 |
|
189 |
DO i = 1, knon |
190 |
u_zref(i) = delu(i) |
191 |
q_zref(i) = max(qsurf(i), 0.0) + delq(i) |
192 |
te_zref(i) = ts1(i) + delte(i) |
193 |
temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
194 |
u_zref_p(i) = u_zref(i) |
195 |
ENDDO |
196 |
|
197 |
! Iteration of the variables at the reference level zref: |
198 |
! corrector ; see Hess & McAvaney, 1995 |
199 |
|
200 |
DO n = 1, niter |
201 |
okri=.TRUE. |
202 |
CALL screenc(klon, knon, nsrf, zxli, & |
203 |
u_zref, temp, q_zref, zref, & |
204 |
ts1, qsurf, rugos, psol, & |
205 |
ustar, testar, qstar, okri, ri1, & |
206 |
pref, delu, delte, delq) |
207 |
|
208 |
DO i = 1, knon |
209 |
u_zref(i) = delu(i) |
210 |
q_zref(i) = delq(i) + max(qsurf(i), 0.0) |
211 |
te_zref(i) = delte(i) + ts1(i) |
212 |
temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
213 |
ENDDO |
214 |
ENDDO |
215 |
|
216 |
DO i = 1, knon |
217 |
u_zref_c(i) = u_zref(i) |
218 |
|
219 |
u_10m(i) = u_zref_p(i) * ok_pred(i) + u_zref_c(i) * ok_corr(i) |
220 |
|
221 |
q_zref_c(i) = q_zref(i) |
222 |
temp_c(i) = temp(i) |
223 |
t_10m(i) = temp_p(i) * ok_pred(i) + temp_c(i) * ok_corr(i) |
224 |
q_10m(i) = q_zref_p(i) * ok_pred(i) + q_zref_c(i) * ok_corr(i) |
225 |
ENDDO |
226 |
|
227 |
END subroutine stdlevvar |
228 |
|
229 |
end module stdlevvar_m |