| 1 |
jmc |
1.9 |
C $Header: /u/gcmpack/MITgcm/pkg/generic_advdiff/gad_grad_x.F,v 1.8 2007/08/16 02:16:37 jmc Exp $ |
| 2 |
adcroft |
1.2 |
C $Name: $ |
| 3 |
adcroft |
1.1 |
|
| 4 |
|
|
#include "GAD_OPTIONS.h" |
| 5 |
|
|
|
| 6 |
adcroft |
1.2 |
CBOP |
| 7 |
|
|
C !ROUTINE: GAD_GRAD_X |
| 8 |
|
|
|
| 9 |
|
|
C !INTERFACE: ========================================================== |
| 10 |
jmc |
1.6 |
SUBROUTINE GAD_GRAD_X( |
| 11 |
adcroft |
1.1 |
I bi,bj,k, |
| 12 |
|
|
I xA, |
| 13 |
jmc |
1.4 |
U tracer, |
| 14 |
adcroft |
1.1 |
O dTdx, |
| 15 |
|
|
I myThid ) |
| 16 |
adcroft |
1.2 |
|
| 17 |
|
|
C !DESCRIPTION: |
| 18 |
adcroft |
1.3 |
C Calculates the zonal gradient of a tracer: $\partial_x \theta |
| 19 |
|
|
C = \frac{1}{\Delta x_c} \delta_i \theta$ |
| 20 |
|
|
C and multiplies by the area. |
| 21 |
adcroft |
1.2 |
|
| 22 |
|
|
C !USES: =============================================================== |
| 23 |
adcroft |
1.1 |
IMPLICIT NONE |
| 24 |
|
|
#include "SIZE.h" |
| 25 |
jmc |
1.4 |
#include "EEPARAMS.h" |
| 26 |
adcroft |
1.1 |
#include "GRID.h" |
| 27 |
|
|
|
| 28 |
adcroft |
1.2 |
C !INPUT PARAMETERS: =================================================== |
| 29 |
jmc |
1.4 |
C bi,bj :: tile indices |
| 30 |
|
|
C k :: vertical level |
| 31 |
|
|
C myThid :: thread number |
| 32 |
adcroft |
1.1 |
INTEGER bi,bj,k |
| 33 |
|
|
_RS xA (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 34 |
jmc |
1.4 |
INTEGER myThid |
| 35 |
|
|
|
| 36 |
|
|
C !UPDATED PARAMETERS: ================================================= |
| 37 |
|
|
C tracer :: tracer field |
| 38 |
|
|
C (NOTE: only udate the corner-halo region when using CS-grid) |
| 39 |
adcroft |
1.1 |
_RL tracer(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 40 |
adcroft |
1.2 |
|
| 41 |
|
|
C !OUTPUT PARAMETERS: ================================================== |
| 42 |
jmc |
1.4 |
C dTdx :: zonal gradient (units = [Tr_units]*[r_units]) |
| 43 |
adcroft |
1.1 |
_RL dTdx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 44 |
|
|
|
| 45 |
adcroft |
1.2 |
C !LOCAL VARIABLES: ==================================================== |
| 46 |
jmc |
1.4 |
C i,j :: loop indices |
| 47 |
adcroft |
1.1 |
INTEGER i,j |
| 48 |
adcroft |
1.2 |
CEOP |
| 49 |
adcroft |
1.1 |
|
| 50 |
heimbach |
1.7 |
cph-exch2#ifndef ALLOW_AUTODIFF_TAMC |
| 51 |
jmc |
1.4 |
C-- Internal exchange for calculations in X |
| 52 |
|
|
IF (useCubedSphereExchange) THEN |
| 53 |
jmc |
1.9 |
CALL FILL_CS_CORNER_TR_RL( 1, .FALSE., |
| 54 |
jmc |
1.8 |
& tracer, bi,bj, myThid ) |
| 55 |
jmc |
1.4 |
ENDIF |
| 56 |
heimbach |
1.7 |
cph-exch2#endif |
| 57 |
jmc |
1.4 |
|
| 58 |
adcroft |
1.1 |
C o Zonal tracer gradient |
| 59 |
|
|
DO j=1-Oly,sNy+Oly |
| 60 |
|
|
dTdx(1-Olx,j)=0. |
| 61 |
|
|
DO i=1-Olx+1,sNx+Olx |
| 62 |
jmc |
1.6 |
dTdx(i,j) = xA(i,j) |
| 63 |
|
|
& *_recip_dxC(i,j,bi,bj)*recip_deepFacC(k) |
| 64 |
|
|
& *(tracer(i,j)-tracer(i-1,j)) |
| 65 |
adcroft |
1.1 |
#ifdef COSINEMETH_III |
| 66 |
jmc |
1.6 |
& *sqCosFacU(j,bi,bj) |
| 67 |
adcroft |
1.1 |
#endif |
| 68 |
|
|
ENDDO |
| 69 |
|
|
ENDDO |
| 70 |
|
|
|
| 71 |
|
|
RETURN |
| 72 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph