1 |
module stdlevvar_m |
2 |
|
3 |
IMPLICIT NONE |
4 |
|
5 |
contains |
6 |
|
7 |
SUBROUTINE stdlevvar(nsrf, u1, v1, t1, q1, z1, ts1, qsurf, rugos, psol, & |
8 |
pat1, t_2m, q_2m, t_10m, q_10m, wind10m, ustar) |
9 |
|
10 |
! From LMDZ4/libf/phylmd/stdlevvar.F90, version 1.3, 2005/05/25 13:10:09 |
11 |
|
12 |
! Objet : calcul de la température et de l'humidité relative à 2 m |
13 |
! et du module du vent à 10 m à partir des relations de |
14 |
! Dyer-Businger et des équations de Louis. |
15 |
|
16 |
! Reference: Hess, Colman and McAvaney (1995) |
17 |
|
18 |
! Author: I. Musat, July 1st, 2002 |
19 |
|
20 |
use nr_util, only: assert_eq |
21 |
|
22 |
use coefcdrag_m, only: coefcdrag |
23 |
USE dimphy, ONLY: klon |
24 |
USE suphec_m, ONLY: rg, rkappa |
25 |
use screenc_m, only: screenc |
26 |
use screenp_m, only: screenp |
27 |
|
28 |
INTEGER, intent(in):: nsrf ! indice pour le type de surface |
29 |
REAL, intent(in):: u1(:) ! (knon) vent zonal au 1er niveau du modele |
30 |
REAL, intent(in):: v1(:) ! (knon) vent meridien au 1er niveau du modele |
31 |
REAL, intent(in):: t1(:) ! (knon) temperature de l'air au 1er |
32 |
! niveau du modele |
33 |
REAL, intent(in):: q1(klon) ! humidite relative au 1er niveau du modele |
34 |
REAL, intent(in):: z1 (klon) ! geopotentiel au 1er niveau du modele |
35 |
REAL, intent(in):: ts1(klon) ! temperature de l'air a la surface |
36 |
REAL, intent(in):: qsurf(klon) ! humidite relative a la surface |
37 |
REAL, intent(in):: rugos(klon) ! rugosite |
38 |
REAL, intent(in):: psol(klon) ! pression au sol |
39 |
REAL, intent(in):: pat1(klon) ! pression au 1er niveau du modele |
40 |
REAL, intent(out):: t_2m(klon) ! temperature de l'air a 2m |
41 |
REAL, intent(out):: q_2m(klon) ! humidite relative a 2m |
42 |
REAL, intent(out):: t_10m(klon) ! temperature de l'air a 10m |
43 |
REAL, intent(out):: q_10m(klon) ! humidite specifique a 10m |
44 |
REAL, intent(out):: wind10m(:) ! (knon) norme du vent \`a 10m |
45 |
REAL, intent(out):: ustar(:) ! (knon) u* |
46 |
|
47 |
! Local: |
48 |
INTEGER knon ! nombre de points pour un type de surface |
49 |
REAL, PARAMETER:: RKAR = 0.4 ! constante de von Karman |
50 |
INTEGER, parameter:: niter = 2 ! nombre iterations calcul "corrector" |
51 |
INTEGER i, n |
52 |
REAL zref |
53 |
REAL, dimension(klon):: speed |
54 |
! tpot : temperature potentielle |
55 |
REAL, dimension(klon):: tpot |
56 |
REAL cdram(klon), cdrah(klon) |
57 |
REAL, dimension(klon):: testar, qstar |
58 |
REAL, dimension(klon):: zdte, zdq |
59 |
! lmon : longueur de Monin-Obukhov selon Hess, Colman and McAvaney |
60 |
DOUBLE PRECISION, dimension(klon):: lmon |
61 |
REAL, dimension(klon):: delu, delte, delq |
62 |
REAL, dimension(klon):: u_zref, te_zref, q_zref |
63 |
REAL, dimension(klon):: temp |
64 |
real pref(size(u1)) ! (knon) |
65 |
|
66 |
!------------------------------------------------------------------------- |
67 |
|
68 |
knon = assert_eq([size(u1), size(v1), size(t1), size(wind10m), & |
69 |
size(ustar)], "stdlevvar knon") |
70 |
|
71 |
DO i=1, knon |
72 |
speed(i)=SQRT(u1(i)**2+v1(i)**2) |
73 |
ENDDO |
74 |
|
75 |
CALL coefcdrag(nsrf, speed(:knon), t1(:knon), q1(:knon), z1(:knon), & |
76 |
psol(:knon), ts1, qsurf, rugos, cdram, cdrah) |
77 |
|
78 |
! Star variables |
79 |
|
80 |
DO i = 1, knon |
81 |
tpot(i) = t1(i)* (psol(i)/pat1(i))**RKAPPA |
82 |
ustar(i) = sqrt(cdram(i) * speed(i) * speed(i)) |
83 |
zdte(i) = tpot(i) - ts1(i) |
84 |
zdq(i) = max(q1(i), 0.0) - max(qsurf(i), 0.0) |
85 |
|
86 |
zdte(i) = sign(max(abs(zdte(i)), 1.e-10), zdte(i)) |
87 |
|
88 |
testar(i) = (cdrah(i) * zdte(i) * speed(i))/ustar(i) |
89 |
qstar(i) = (cdrah(i) * zdq(i) * speed(i))/ustar(i) |
90 |
lmon(i) = (ustar(i) * ustar(i) * tpot(i)) / (RKAR * RG * testar(i)) |
91 |
ENDDO |
92 |
|
93 |
! First aproximation of variables at zref |
94 |
zref = 2.0 |
95 |
CALL screenp(knon, speed, tpot, q1, ts1, qsurf, rugos, lmon, ustar, & |
96 |
testar, qstar, zref, delu, delte, delq) |
97 |
|
98 |
DO i = 1, knon |
99 |
u_zref(i) = delu(i) |
100 |
q_zref(i) = max(qsurf(i), 0.0) + delq(i) |
101 |
te_zref(i) = ts1(i) + delte(i) |
102 |
temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
103 |
ENDDO |
104 |
|
105 |
! Iteration of the variables at the reference level zref : |
106 |
! corrector calculation ; see Hess & McAvaney, 1995 |
107 |
|
108 |
DO n = 1, niter |
109 |
CALL screenc(klon, knon, nsrf, u_zref, temp, q_zref, zref, ts1, & |
110 |
qsurf, rugos, psol, ustar, testar, qstar, pref, delu, delte, delq) |
111 |
|
112 |
DO i = 1, knon |
113 |
u_zref(i) = delu(i) |
114 |
q_zref(i) = delq(i) + max(qsurf(i), 0.0) |
115 |
te_zref(i) = delte(i) + ts1(i) |
116 |
|
117 |
! return to normal temperature |
118 |
temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
119 |
ENDDO |
120 |
ENDDO |
121 |
|
122 |
! verifier le critere de convergence : 0.25% pour te_zref et 5% pour qe_zref |
123 |
|
124 |
DO i = 1, knon |
125 |
t_2m(i) = temp(i) |
126 |
q_2m(i) = q_zref(i) |
127 |
ENDDO |
128 |
|
129 |
! First aproximation of variables at zref |
130 |
|
131 |
zref = 10. |
132 |
CALL screenp(knon, speed, tpot, q1, ts1, qsurf, rugos, lmon, ustar, & |
133 |
testar, qstar, zref, delu, delte, delq) |
134 |
|
135 |
DO i = 1, knon |
136 |
u_zref(i) = delu(i) |
137 |
q_zref(i) = max(qsurf(i), 0.0) + delq(i) |
138 |
te_zref(i) = ts1(i) + delte(i) |
139 |
temp(i) = te_zref(i) * (psol(i)/pat1(i))**(-RKAPPA) |
140 |
ENDDO |
141 |
|
142 |
! Iteration of the variables at the reference level zref: |
143 |
! corrector ; see Hess & McAvaney, 1995 |
144 |
|
145 |
DO n = 1, niter |
146 |
CALL screenc(klon, knon, nsrf, u_zref, temp, q_zref, zref, ts1, & |
147 |
qsurf, rugos, psol, ustar, testar, qstar, pref, delu, delte, delq) |
148 |
|
149 |
DO i = 1, knon |
150 |
u_zref(i) = delu(i) |
151 |
q_zref(i) = delq(i) + max(qsurf(i), 0.0) |
152 |
te_zref(i) = delte(i) + ts1(i) |
153 |
temp(i) = te_zref(i) * (psol(i)/pref(i))**(-RKAPPA) |
154 |
ENDDO |
155 |
ENDDO |
156 |
|
157 |
DO i = 1, knon |
158 |
wind10m(i) = u_zref(i) |
159 |
t_10m(i) = temp(i) |
160 |
q_10m(i) = q_zref(i) |
161 |
ENDDO |
162 |
|
163 |
END subroutine stdlevvar |
164 |
|
165 |
end module stdlevvar_m |