| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/fizhi/slprs.F,v 1.2 2006/05/18 22:14:23 molod Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "FIZHI_OPTIONS.h" |
| 5 |
subroutine slprs (PHIS,PLE,THZ,lwmask,im,jm,lm,SLP) |
| 6 |
C********************************************************************** |
| 7 |
C INPUT |
| 8 |
C PHIS .... SURFACE GEOPOTENTIAL (M2/S2) |
| 9 |
C THZ ..... POTENTIAL TEMPERATURE (K) ON Model LEVELS |
| 10 |
C grid .... Dynamics Grid Structure |
| 11 |
C lwmask .. Land:(0.0) Water:(1.0) Mask |
| 12 |
C |
| 13 |
C OUTPUT |
| 14 |
C SLP ..... SEA LEVEL PRESSURE (MB) |
| 15 |
C |
| 16 |
C NOTE: Level counting here for thz and ple is top down (thz(1) is top) |
| 17 |
C*********************************************************************** |
| 18 |
|
| 19 |
implicit none |
| 20 |
|
| 21 |
integer im,jm,lm |
| 22 |
_RL SLP (im*jm) |
| 23 |
_RL PHIS (im*jm), THZ (im*jm,lm) |
| 24 |
_RL lwmask(im*jm) |
| 25 |
_RL ple(im*jm,lm+1) |
| 26 |
|
| 27 |
_RL TWO, BETA |
| 28 |
PARAMETER(TWO = 2.0) |
| 29 |
PARAMETER(BETA = 0.0065) |
| 30 |
|
| 31 |
_RL getcon,g,r,ak |
| 32 |
integer i,L |
| 33 |
_RL tm (im*jm) |
| 34 |
integer Ltop (im*jm) |
| 35 |
|
| 36 |
G = GETCON('GRAVITY') |
| 37 |
R = GETCON('RGAS') |
| 38 |
AK = GETCON('KAPPA') |
| 39 |
C*********************************************************************** |
| 40 |
C* COMPUTE MEAN THETA IN PBL (100 MB) * |
| 41 |
C*********************************************************************** |
| 42 |
|
| 43 |
do i=1,im*jm |
| 44 |
tm(i) = 0.0 |
| 45 |
Ltop(i) = lm |
| 46 |
enddo |
| 47 |
|
| 48 |
do L = lm,1,-1 |
| 49 |
do i=1,im*jm |
| 50 |
if ( ple(i,L+1).ge.(ple(i,lm+1)-100.) ) then |
| 51 |
Ltop(i) = L |
| 52 |
tm(i) = tm(i) + thz(i,L)*(ple(i,L+1)-ple(i,L)) |
| 53 |
endif |
| 54 |
enddo |
| 55 |
enddo |
| 56 |
|
| 57 |
do i=1,im*jm |
| 58 |
tm(i) = tm(i)/(ple(i,lm+1)-ple(i,Ltop(i))) |
| 59 |
enddo |
| 60 |
|
| 61 |
C*********************************************************************** |
| 62 |
C* COMPUTE SEA LEVEL PRESSURE * |
| 63 |
C*********************************************************************** |
| 64 |
|
| 65 |
do i=1,im*jm |
| 66 |
if( lwmask(i).ne.0.0 ) then |
| 67 |
TM(I) = TM(I) * (PLE(I,LM+1)/1000.)**AK + BETA*PHIS(I)/(TWO*G) |
| 68 |
else |
| 69 |
TM(I) = THZ(I,LM)*(PLE(I,LM+1)/1000.)**AK + BETA*PHIS(I)/(TWO*G) |
| 70 |
endif |
| 71 |
|
| 72 |
SLP(I) = PHIS(I) / ( R*TM(I) ) |
| 73 |
SLP(I) = PLE(I,LM+1) * EXP( SLP(I) ) |
| 74 |
enddo |
| 75 |
|
| 76 |
RETURN |
| 77 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph