1 |
cnh |
1.3 |
C $Header: /u/gcmpack/models/MITgcmUV/pkg/aim/phy_shtorh.F,v 1.2 2001/02/02 21:36:29 adcroft Exp $ |
2 |
|
|
C $Name: $ |
3 |
adcroft |
1.2 |
|
4 |
cnh |
1.3 |
SUBROUTINE SHTORH (IMODE,NGP,TA,PS,SIG,QA,RH,QSAT,myThid) |
5 |
adcroft |
1.2 |
C-- |
6 |
|
|
C-- SUBROUTINE SHTORH (IMODE,NGP,TA,PS,SIG,QA,RH,QSAT) |
7 |
|
|
C-- |
8 |
|
|
C-- Purpose: compute saturation specific humidity and |
9 |
|
|
C-- relative hum. from specific hum. (or viceversa) |
10 |
|
|
C-- Input: IMODE : mode of operation |
11 |
|
|
C-- NGP : no. of grid-points |
12 |
|
|
C-- TA : abs. temperature |
13 |
|
|
C-- PS : normalized pressure (= p/1000_hPa) [if SIG < 0] |
14 |
|
|
C-- : normalized sfc. pres. (= ps/1000_hPa) [if SIG > 0] |
15 |
|
|
C-- SIG : sigma level |
16 |
|
|
C-- QA : specific humidity in g/kg [if IMODE > 0] |
17 |
|
|
C-- RH : relative humidity [if IMODE < 0] |
18 |
|
|
C-- QSAT : saturation spec. hum. in g/kg |
19 |
|
|
C-- Output: RH : relative humidity [if IMODE > 0] |
20 |
|
|
C-- QA : specific humidity in g/kg [if IMODE < 0] |
21 |
|
|
C-- |
22 |
|
|
|
23 |
|
|
|
24 |
|
|
IMPLICIT rEAL*8 (A-H,O-Z) |
25 |
cnh |
1.3 |
INTEGER myThid |
26 |
adcroft |
1.2 |
|
27 |
|
|
|
28 |
|
|
CcnhDebugStarts |
29 |
|
|
#include "SIZE.h" |
30 |
|
|
CcnhDebugEnds |
31 |
|
|
REAL TA(NGP), PS(NGP), QA(NGP), RH(NGP), QSAT(NGP) |
32 |
|
|
C |
33 |
|
|
C--- 1. Compute Qsat (g/kg) from T (degK) and normalized pres. P (= p/1000_hPa) |
34 |
|
|
C If SIG > 0, P = Ps * sigma, otherwise P = Ps(1) = const. |
35 |
|
|
C |
36 |
|
|
E0= 6.108 _d -3 |
37 |
|
|
C1= 17.269 _d 0 |
38 |
|
|
C2= 21.875 _d 0 |
39 |
|
|
T0=273.16 _d 0 |
40 |
|
|
T1= 35.86 _d 0 |
41 |
|
|
T2= 7.66 _d 0 |
42 |
|
|
C |
43 |
|
|
DO 110 J=1,NGP |
44 |
|
|
QSAT(J)=0. |
45 |
|
|
IF (TA(J).GE.T0) THEN |
46 |
|
|
QSAT(J)=E0*EXP(C1*(TA(J)-T0)/(TA(J)-T1)) |
47 |
|
|
ELSE IF ( TA(J).GT.0.) then |
48 |
|
|
QSAT(J)=E0*EXP(C2*(TA(J)-T0)/(TA(J)-T2)) |
49 |
|
|
ENDIF |
50 |
|
|
110 CONTINUE |
51 |
|
|
C |
52 |
|
|
IF (SIG.LE.0.0) THEN |
53 |
|
|
DO 120 J=1,NGP |
54 |
|
|
QSAT(J)=622. _d 0*QSAT(J)/(PS(1)-0.378 _d 0*QSAT(J)) |
55 |
|
|
120 CONTINUE |
56 |
|
|
ELSE |
57 |
|
|
DO 130 J=1,NGP |
58 |
|
|
QSAT(J)=622. _d 0*QSAT(J)/(SIG*PS(J)-0.378 _d 0*QSAT(J)) |
59 |
|
|
130 CONTINUE |
60 |
|
|
ENDIF |
61 |
|
|
chh write(0,*) 'MAXVAL(QSAT)=',MAXVAL(QSAT) |
62 |
|
|
chh write(0,*) 'MINVAL(QSAT)=',MINVAL(QSAT) |
63 |
|
|
C |
64 |
|
|
C--- 2. Compute rel.hum. RH=Q/Qsat (IMODE>0), or Q=RH*Qsat (IMODE<0) |
65 |
|
|
C |
66 |
|
|
IF (IMODE.GT.0) THEN |
67 |
|
|
DO 210 J=1,NGP |
68 |
|
|
IF(QSAT(J).ne.0.) then |
69 |
|
|
RH(J)=QA(J)/QSAT(J) |
70 |
|
|
ELSE |
71 |
|
|
RH(J)=0. |
72 |
|
|
ENDIF |
73 |
|
|
210 CONTINUE |
74 |
|
|
ELSE IF (IMODE.LT.0) THEN |
75 |
|
|
DO 220 J=1,NGP |
76 |
|
|
QA(J)=RH(J)*QSAT(J) |
77 |
|
|
220 CONTINUE |
78 |
|
|
ENDIF |
79 |
|
|
chh write(0,*) 'MAXVAL(QA)=',MAXVAL(QA) |
80 |
|
|
chh write(0,*) 'MINVAL(QA)=',MINVAL(QA) |
81 |
|
|
chh write(0,*) 'MAXVAL(RH)=',MAXVAL(RH) |
82 |
|
|
chh write(0,*) 'MINVAL(RH)=',MINVAL(RH) |
83 |
|
|
C |
84 |
|
|
RETURN |
85 |
|
|
END |
86 |
|
|
|
87 |
|
|
SUBROUTINE ZMEDDY (NLON,NLAT,FF,ZM,EDDY) |
88 |
|
|
|
89 |
|
|
|
90 |
|
|
IMPLICIT rEAL*8 (A-H,O-Z) |
91 |
|
|
|
92 |
|
|
|
93 |
|
|
C |
94 |
|
|
C *** Decompose a field into zonal-mean and eddy component |
95 |
|
|
C |
96 |
|
|
REAL FF(NLON,NLAT), ZM(NLAT), EDDY(NLON,NLAT) |
97 |
|
|
C |
98 |
|
|
RNLON=1./NLON |
99 |
|
|
C |
100 |
|
|
DO 130 J=1,NLAT |
101 |
|
|
C |
102 |
|
|
ZM(J)=0. |
103 |
|
|
DO 110 I=1,NLON |
104 |
|
|
ZM(J)=ZM(J)+FF(I,J) |
105 |
|
|
110 CONTINUE |
106 |
|
|
ZM(J)=ZM(J)*RNLON |
107 |
|
|
C |
108 |
|
|
DO 120 I=1,NLON |
109 |
|
|
EDDY(I,J)=FF(I,J)-ZM(J) |
110 |
|
|
120 CONTINUE |
111 |
|
|
C |
112 |
|
|
130 CONTINUE |
113 |
|
|
C |
114 |
|
|
C-- |
115 |
|
|
RETURN |
116 |
|
|
END |
117 |
|
|
C |