1 |
SUBROUTINE orodrag(nlon,nlev,ktest,ptsphy,paphm1,papm1,pgeom1, & |
2 |
ptm1,pum1,pvm1,pmea,pstd,psig,pgamma,ptheta,ppic,pval & |
3 |
,pulow,pvlow,pvom,pvol,pte) |
4 |
|
5 |
USE dimens_m |
6 |
USE dimphy |
7 |
use gwstress_m, only: gwstress |
8 |
USE suphec_m |
9 |
USE yoegwd |
10 |
use gwprofil_m, only: gwprofil |
11 |
use orosetup_m, only: orosetup |
12 |
IMPLICIT NONE |
13 |
|
14 |
|
15 |
|
16 |
!**** *gwdrag* - does the gravity wave parametrization. |
17 |
|
18 |
! purpose. |
19 |
! -------- |
20 |
|
21 |
! this routine computes the physical tendencies of the |
22 |
! prognostic variables u,v and t due to vertical transports by |
23 |
! subgridscale orographically excited gravity waves |
24 |
|
25 |
!** interface. |
26 |
! ---------- |
27 |
! called from *callpar*. |
28 |
|
29 |
! the routine takes its input from the long-term storage: |
30 |
! u,v,t and p at t-1. |
31 |
|
32 |
! explicit arguments : |
33 |
! -------------------- |
34 |
! ==== inputs === |
35 |
! ==== outputs === |
36 |
|
37 |
! implicit arguments : none |
38 |
! -------------------- |
39 |
|
40 |
! implicit logical (l) |
41 |
|
42 |
! method. |
43 |
! ------- |
44 |
|
45 |
! reference. |
46 |
! ---------- |
47 |
|
48 |
! author. |
49 |
! ------- |
50 |
! m.miller + b.ritter e.c.m.w.f. 15/06/86. |
51 |
|
52 |
! f.lott + m. miller e.c.m.w.f. 22/11/94 |
53 |
!----------------------------------------------------------------------- |
54 |
|
55 |
|
56 |
!----------------------------------------------------------------------- |
57 |
|
58 |
!* 0.1 arguments |
59 |
! --------- |
60 |
|
61 |
|
62 |
INTEGER nlon, nlev |
63 |
INTEGER jl, ilevp1, jk, ji |
64 |
REAL zdelp, ztemp, zforc, ztend |
65 |
REAL rover, zb, zc, zconb, zabsv |
66 |
REAL zzd1, ratio, zbet, zust, zvst, zdis |
67 |
REAL pte(nlon,nlev), pvol(nlon,nlev), pvom(nlon,nlev), pulow(klon), & |
68 |
pvlow(klon) |
69 |
REAL pum1(nlon,nlev), pvm1(nlon,nlev), ptm1(nlon,nlev), pmea(nlon) |
70 |
REAL, INTENT (IN) :: pstd(nlon) |
71 |
REAL, INTENT (IN) :: psig(nlon) |
72 |
REAL pgamma(nlon), ptheta(nlon), ppic(nlon), pval(nlon), & |
73 |
pgeom1(nlon,nlev), papm1(nlon,nlev), paphm1(nlon,nlev+1) |
74 |
|
75 |
INTEGER ktest(nlon) |
76 |
!----------------------------------------------------------------------- |
77 |
|
78 |
!* 0.2 local arrays |
79 |
! ------------ |
80 |
INTEGER icrit(klon), ikcrith(klon), ikenvh(klon), & |
81 |
iknu(klon), iknu2(klon), ikcrit(klon) |
82 |
|
83 |
REAL ztau(klon,klev+1), zstab(klon,klev+1), & |
84 |
zvph(klon,klev+1), zrho(klon,klev+1), zri(klon,klev+1), & |
85 |
zpsi(klon,klev+1), zzdep(klon,klev) |
86 |
REAL zdudt(klon), zdvdt(klon), zvidis(klon), & |
87 |
znu(klon), zd1(klon), zd2(klon), zdmod(klon) |
88 |
REAL ztmst |
89 |
REAL, INTENT (IN) :: ptsphy |
90 |
|
91 |
!------------------------------------------------------------------ |
92 |
|
93 |
!* 1. initialization |
94 |
! -------------- |
95 |
|
96 |
!* 1.1 computational constants |
97 |
! ----------------------- |
98 |
|
99 |
ztmst = ptsphy |
100 |
! ------------------------------------------------------------------ |
101 |
|
102 |
!* 1.3 check whether row contains point for printing |
103 |
! --------------------------------------------- |
104 |
|
105 |
!* 2. precompute basic state variables. |
106 |
!* ---------- ----- ----- ---------- |
107 |
!* define low level wind, project winds in plane of |
108 |
!* low level wind, determine sector in which to take |
109 |
!* the variance and set indicator for critical levels. |
110 |
|
111 |
|
112 |
CALL orosetup(nlon,ktest,ikcrit,ikcrith,icrit,ikenvh,iknu,iknu2,paphm1, & |
113 |
papm1,pum1,pvm1,ptm1,pgeom1,zrho,zri,zstab,ztau,zvph,zpsi,zzdep, & |
114 |
pulow,pvlow,ptheta,pgamma,pmea,ppic,pval,znu,zd1,zd2,zdmod) |
115 |
|
116 |
|
117 |
|
118 |
!*********************************************************** |
119 |
|
120 |
|
121 |
!* 3. compute low level stresses using subcritical and |
122 |
!* supercritical forms.computes anisotropy coefficient |
123 |
!* as measure of orographic twodimensionality. |
124 |
|
125 |
CALL gwstress(nlon,nlev,ktest,ikenvh,zrho,zstab,zvph,pstd, & |
126 |
psig,pmea,ppic,ztau,pgeom1,zdmod) |
127 |
|
128 |
|
129 |
!* 4. compute stress profile. |
130 |
!* ------- ------ -------- |
131 |
|
132 |
CALL gwprofil(nlon,nlev,ktest,ikcrith,icrit,paphm1,zrho,zstab, & |
133 |
zvph,zri,ztau,zdmod,psig,pstd) |
134 |
|
135 |
|
136 |
!* 5. compute tendencies. |
137 |
!* ------------------- |
138 |
|
139 |
! explicit solution at all levels for the gravity wave |
140 |
! implicit solution for the blocked levels |
141 |
|
142 |
DO 510 jl = 1, klon |
143 |
zvidis(jl) = 0.0 |
144 |
zdudt(jl) = 0.0 |
145 |
zdvdt(jl) = 0.0 |
146 |
510 CONTINUE |
147 |
|
148 |
ilevp1 = klev + 1 |
149 |
|
150 |
|
151 |
DO 524 jk = 1, klev |
152 |
|
153 |
|
154 |
! Modif vectorisation 02/04/2004 |
155 |
DO 523 ji = 1, klon |
156 |
IF (ktest(ji)==1) THEN |
157 |
|
158 |
zdelp = paphm1(ji,jk+1) - paphm1(ji,jk) |
159 |
ztemp = -rg*(ztau(ji,jk+1)-ztau(ji,jk))/(zvph(ji,ilevp1)*zdelp) |
160 |
zdudt(ji) = (pulow(ji)*zd1(ji)-pvlow(ji)*zd2(ji))*ztemp/zdmod(ji) |
161 |
zdvdt(ji) = (pvlow(ji)*zd1(ji)+pulow(ji)*zd2(ji))*ztemp/zdmod(ji) |
162 |
|
163 |
! controle des overshoots: |
164 |
|
165 |
zforc = sqrt(zdudt(ji)**2+zdvdt(ji)**2) + 1.E-12 |
166 |
ztend = sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/ztmst + 1.E-12 |
167 |
rover = 0.25 |
168 |
IF (zforc>=rover*ztend) THEN |
169 |
zdudt(ji) = rover*ztend/zforc*zdudt(ji) |
170 |
zdvdt(ji) = rover*ztend/zforc*zdvdt(ji) |
171 |
END IF |
172 |
|
173 |
! fin du controle des overshoots |
174 |
|
175 |
IF (jk>=ikenvh(ji)) THEN |
176 |
zb = 1.0 - 0.18*pgamma(ji) - 0.04*pgamma(ji)**2 |
177 |
zc = 0.48*pgamma(ji) + 0.3*pgamma(ji)**2 |
178 |
zconb = 2.*ztmst*gkwake*psig(ji)/(4.*pstd(ji)) |
179 |
zabsv = sqrt(pum1(ji,jk)**2+pvm1(ji,jk)**2)/2. |
180 |
zzd1 = zb*cos(zpsi(ji,jk))**2 + zc*sin(zpsi(ji,jk))**2 |
181 |
ratio = (cos(zpsi(ji,jk))**2+pgamma(ji)*sin(zpsi(ji, & |
182 |
jk))**2)/(pgamma(ji)*cos(zpsi(ji,jk))**2+sin(zpsi(ji,jk))**2) |
183 |
zbet = max(0.,2.-1./ratio)*zconb*zzdep(ji,jk)*zzd1*zabsv |
184 |
|
185 |
! simplement oppose au vent |
186 |
|
187 |
zdudt(ji) = -pum1(ji,jk)/ztmst |
188 |
zdvdt(ji) = -pvm1(ji,jk)/ztmst |
189 |
|
190 |
! projection dans la direction de l'axe principal de l'orographie |
191 |
!mod zdudt(ji)=-(pum1(ji,jk)*cos(ptheta(ji)*rpi/180.) |
192 |
!mod * +pvm1(ji,jk)*sin(ptheta(ji)*rpi/180.)) |
193 |
!mod * *cos(ptheta(ji)*rpi/180.)/ztmst |
194 |
!mod zdvdt(ji)=-(pum1(ji,jk)*cos(ptheta(ji)*rpi/180.) |
195 |
!mod * +pvm1(ji,jk)*sin(ptheta(ji)*rpi/180.)) |
196 |
!mod * *sin(ptheta(ji)*rpi/180.)/ztmst |
197 |
zdudt(ji) = zdudt(ji)*(zbet/(1.+zbet)) |
198 |
zdvdt(ji) = zdvdt(ji)*(zbet/(1.+zbet)) |
199 |
END IF |
200 |
pvom(ji,jk) = zdudt(ji) |
201 |
pvol(ji,jk) = zdvdt(ji) |
202 |
zust = pum1(ji,jk) + ztmst*zdudt(ji) |
203 |
zvst = pvm1(ji,jk) + ztmst*zdvdt(ji) |
204 |
zdis = 0.5*(pum1(ji,jk)**2+pvm1(ji,jk)**2-zust**2-zvst**2) |
205 |
zvidis(ji) = zvidis(ji) + zdis*zdelp |
206 |
|
207 |
! ENCORE UN TRUC POUR EVITER LES EXPLOSIONS |
208 |
|
209 |
pte(ji,jk) = 0.0 |
210 |
|
211 |
END IF |
212 |
523 CONTINUE |
213 |
|
214 |
524 CONTINUE |
215 |
|
216 |
|
217 |
RETURN |
218 |
END |