| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/streamice/streamice_init_varia.F,v 1.6 2011/06/29 16:24:10 dng Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "STREAMICE_OPTIONS.h" |
| 5 |
|
| 6 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 7 |
|
| 8 |
CBOP |
| 9 |
SUBROUTINE STREAMICE_DRIVING_STRESS( myThid ) |
| 10 |
! O taudx, |
| 11 |
! O taudy ) |
| 12 |
|
| 13 |
C /============================================================\ |
| 14 |
C | SUBROUTINE | |
| 15 |
C | o | |
| 16 |
C |============================================================| |
| 17 |
C | | |
| 18 |
C \============================================================/ |
| 19 |
IMPLICIT NONE |
| 20 |
|
| 21 |
C === Global variables === |
| 22 |
#include "SIZE.h" |
| 23 |
#include "EEPARAMS.h" |
| 24 |
#include "PARAMS.h" |
| 25 |
#include "GRID.h" |
| 26 |
#include "STREAMICE.h" |
| 27 |
#include "STREAMICE_CG.h" |
| 28 |
|
| 29 |
C !INPUT/OUTPUT ARGUMENTS |
| 30 |
INTEGER myThid |
| 31 |
! _RL taudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 32 |
! _RL taudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 33 |
|
| 34 |
#ifdef ALLOW_STREAMICE |
| 35 |
|
| 36 |
|
| 37 |
C LOCAL VARIABLES |
| 38 |
INTEGER i, j, bi, bj, k, l, |
| 39 |
& Gi, Gj |
| 40 |
LOGICAL at_west_bdry, at_east_bdry, |
| 41 |
& at_north_bdry, at_south_bdry |
| 42 |
_RL sx, sy, diffx, diffy, neu_val |
| 43 |
|
| 44 |
IF (myXGlobalLo.eq.1) at_west_bdry = .true. |
| 45 |
IF (myYGlobalLo.eq.1) at_south_bdry = .true. |
| 46 |
IF (myXGlobalLo-1+sNx*nSx.eq.Nx) |
| 47 |
& at_east_bdry = .false. |
| 48 |
IF (myYGlobalLo-1+sNy*nSy.eq.Ny) |
| 49 |
& at_north_bdry = .false. |
| 50 |
|
| 51 |
DO bj = myByLo(myThid), myByHi(myThid) |
| 52 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 53 |
DO j=1-OLy,sNy+OLy |
| 54 |
DO i=1-OLx,sNx+OLx |
| 55 |
taudx_SI(i,j,bi,bj) = 0. _d 0 |
| 56 |
taudy_SI(i,j,bi,bj) = 0. _d 0 |
| 57 |
ENDDO |
| 58 |
ENDDO |
| 59 |
ENDDO |
| 60 |
ENDDO |
| 61 |
|
| 62 |
DO bj = myByLo(myThid), myByHi(myThid) |
| 63 |
DO bi = myBxLo(myThid), myBxHi(myThid) |
| 64 |
|
| 65 |
DO i=0,sNx+1 |
| 66 |
DO j=0,sNy+1 |
| 67 |
|
| 68 |
diffx = 0. _d 0 |
| 69 |
diffy = 0. _d 0 |
| 70 |
sx = 0. _d 0 |
| 71 |
sy = 0. _d 0 |
| 72 |
|
| 73 |
Gi = (myXGlobalLo-1)+(bi-1)*sNx+i |
| 74 |
Gj = (myYGlobalLo-1)+(bj-1)*sNy+j |
| 75 |
|
| 76 |
IF (STREAMICE_hmask(i,j,bi,bj).eq.1.0) THEN |
| 77 |
IF (Gi .eq. 1) THEN |
| 78 |
IF (STREAMICE_hmask(i+1,j,bi,bj).eq.1.0) THEN |
| 79 |
sx = (surf_el_streamice(i+1,j,bi,bj)- |
| 80 |
& surf_el_streamice(i,j,bi,bj))/dxC(i+1,j,bi,bj) |
| 81 |
ELSE |
| 82 |
sx = 0. _d 0 |
| 83 |
ENDIF |
| 84 |
ELSEIF (Gi .eq. Nx) THEN |
| 85 |
IF (STREAMICE_hmask(i-1,j,bi,bj).eq.1.0) THEN |
| 86 |
sx = (surf_el_streamice(i,j,bi,bj)- |
| 87 |
& surf_el_streamice(i-1,j,bi,bj))/dxC(i,j,bi,bj) |
| 88 |
ELSE |
| 89 |
sx = 0. _d 0 |
| 90 |
ENDIF |
| 91 |
ELSE |
| 92 |
IF (STREAMICE_hmask(i+1,j,bi,bj).eq.1.0) THEN |
| 93 |
diffx = diffx + dxC(i+1,j,bi,bj) |
| 94 |
sx = surf_el_streamice(i+1,j,bi,bj) |
| 95 |
ELSE |
| 96 |
sx = surf_el_streamice(i,j,bi,bj) |
| 97 |
ENDIF |
| 98 |
IF (STREAMICE_hmask(i-1,j,bi,bj).eq.1.0) THEN |
| 99 |
diffx = diffx + dxC(i,j,bi,bj) |
| 100 |
sx = sx - surf_el_streamice(i-1,j,bi,bj) |
| 101 |
ELSE |
| 102 |
sx = sx - surf_el_streamice(i,j,bi,bj) |
| 103 |
ENDIF |
| 104 |
IF (diffx .gt. 0. _d 0) THEN |
| 105 |
sx = sx / diffx |
| 106 |
ELSE |
| 107 |
sx = 0. _d 0 |
| 108 |
ENDIF |
| 109 |
ENDIF |
| 110 |
|
| 111 |
|
| 112 |
|
| 113 |
IF (Gj .eq. 1) THEN |
| 114 |
IF (STREAMICE_hmask(i,j+1,bi,bj).eq.1.0) THEN |
| 115 |
sy = (surf_el_streamice(i,j+1,bi,bj)- |
| 116 |
& surf_el_streamice(i,j,bi,bj))/dyC(i,j+1,bi,bj) |
| 117 |
ELSE |
| 118 |
sy = 0. _d 0 |
| 119 |
ENDIF |
| 120 |
ELSEIF (Gj .eq. Ny) THEN |
| 121 |
IF (STREAMICE_hmask(i,j-1,bi,bj).eq.1.0) THEN |
| 122 |
sy = (surf_el_streamice(i,j,bi,bj)- |
| 123 |
& surf_el_streamice(i,j-1,bi,bj))/dyC(i,j,bi,bj) |
| 124 |
ELSE |
| 125 |
sy = 0. _d 0 |
| 126 |
ENDIF |
| 127 |
ELSE |
| 128 |
IF (STREAMICE_hmask(i,j+1,bi,bj).eq.1.0) THEN |
| 129 |
|
| 130 |
diffy = diffy + dyC(i,j+1,bi,bj) |
| 131 |
sy = surf_el_streamice(i,j+1,bi,bj) |
| 132 |
ELSE |
| 133 |
sy = surf_el_streamice(i,j,bi,bj) |
| 134 |
ENDIF |
| 135 |
IF (STREAMICE_hmask(i,j-1,bi,bj).eq.1.0) THEN |
| 136 |
diffy = diffy + dyC(i,j,bi,bj) |
| 137 |
sy = sy - surf_el_streamice(i,j-1,bi,bj) |
| 138 |
ELSE |
| 139 |
sy = sy - surf_el_streamice(i,j,bi,bj) |
| 140 |
ENDIF |
| 141 |
IF (diffy .gt. 0. _d 0) THEN |
| 142 |
sy = sy / diffy |
| 143 |
ELSE |
| 144 |
sy = 0. _d 0 |
| 145 |
ENDIF |
| 146 |
ENDIF |
| 147 |
|
| 148 |
DO k=0,1 |
| 149 |
DO l=0,1 |
| 150 |
IF (STREAMICE_umask(i+k,j+l,bi,bj).eq.1.0) THEN |
| 151 |
taudx_SI(i+k,j+l,bi,bj) = taudx_SI(i+k,j+l,bi,bj) - |
| 152 |
& 0.25 * streamice_density * gravity * sx * |
| 153 |
& H_streamice(i,j,bi,bj) * rA(i,j,bi,bj) |
| 154 |
taudy_SI(i+k,j+l,bi,bj) = taudy_SI(i+k,j+l,bi,bj) - |
| 155 |
& 0.25 * streamice_density * gravity * sy * |
| 156 |
& H_streamice(i,j,bi,bj) * rA(i,j,bi,bj) |
| 157 |
|
| 158 |
ENDIF |
| 159 |
ENDDO |
| 160 |
ENDDO |
| 161 |
|
| 162 |
IF (float_frac_streamice(i,j,bi,bj) .eq. 1.0) then |
| 163 |
neu_val = .5 * gravity * |
| 164 |
& (streamice_density * H_streamice (i,j,bi,bj) ** 2 - |
| 165 |
& streamice_density_ocean_avg * R_low(i,j,bi,bj) ** 2) |
| 166 |
ELSE |
| 167 |
neu_val = .5 * gravity * |
| 168 |
& (1-streamice_density/streamice_density_ocean_avg) * |
| 169 |
& streamice_density * H_streamice(i,j,bi,bj) ** 2 |
| 170 |
ENDIF |
| 171 |
|
| 172 |
IF ((STREAMICE_ufacemask(i,j,bi,bj) .eq. 2) |
| 173 |
& .OR. (STREAMICE_hmask(i-1,j,bi,bj) .eq. 0) |
| 174 |
& .OR. (STREAMICE_hmask(i-1,j,bi,bj) .eq. 2) ) THEN ! left face of the cell is at a stress boundary |
| 175 |
! the depth-integrated longitudinal stress is equal to the difference of depth-integrated pressure on either side of the face |
| 176 |
! on the ice side, it is rho g h^2 / 2 |
| 177 |
! on the ocean side, it is rhow g (delta OD)^2 / 2 |
| 178 |
! OD can be zero under the ice; but it is ASSUMED on the ice-free side of the face, topography elevation is not above the base of the |
| 179 |
! ice in the current cell |
| 180 |
|
| 181 |
taudx_SI(i,j,bi,bj) = taudx_SI(i,j,bi,bj) - |
| 182 |
& .5 * dyG(i,j,bi,bj) * neu_val ! note negative sign is due to direction of normal vector |
| 183 |
taudx_SI(i,j+1,bi,bj) = taudx_SI(i,j+1,bi,bj) - |
| 184 |
& .5 * dyG(i,j,bi,bj) * neu_val |
| 185 |
ENDIF |
| 186 |
|
| 187 |
IF ((STREAMICE_ufacemask(i+1,j,bi,bj) .eq. 2) |
| 188 |
& .OR. (STREAMICE_hmask(i+1,j,bi,bj) .eq. 0) |
| 189 |
& .OR. (STREAMICE_hmask(i+1,j,bi,bj) .eq. 2) ) THEN |
| 190 |
|
| 191 |
taudx_SI(i+1,j,bi,bj) = taudx_SI(i+1,j,bi,bj) + |
| 192 |
& .5 * dyG(i+1,j,bi,bj) * neu_val ! note negative sign is due to direction of normal vector |
| 193 |
taudx_SI(i+1,j+1,bi,bj) = taudx_SI(i+1,j+1,bi,bj) + |
| 194 |
& .5 * dyG(i+1,j,bi,bj) * neu_val |
| 195 |
ENDIF |
| 196 |
|
| 197 |
IF ((STREAMICE_vfacemask(i,j,bi,bj) .eq. 2) |
| 198 |
& .OR. (STREAMICE_hmask(i,j-1,bi,bj) .eq. 0) |
| 199 |
& .OR. (STREAMICE_hmask(i,j-1,bi,bj) .eq. 2) ) THEN |
| 200 |
|
| 201 |
taudy_SI(i,j,bi,bj) = taudy_SI(i,j,bi,bj) - |
| 202 |
& .5 * dxG(i,j,bi,bj) * neu_val ! note negative sign is due to direction of normal vector |
| 203 |
taudy_SI(i+1,j,bi,bj) = taudy_SI(i+1,j,bi,bj) - |
| 204 |
& .5 * dxG(i,j,bi,bj) * neu_val |
| 205 |
ENDIF |
| 206 |
|
| 207 |
IF ((STREAMICE_vfacemask(i,j+1,bi,bj) .eq. 2) |
| 208 |
& .OR. (STREAMICE_hmask(i,j+1,bi,bj) .eq. 0) |
| 209 |
& .OR. (STREAMICE_hmask(i,j+1,bi,bj) .eq. 2) ) THEN |
| 210 |
|
| 211 |
taudy_SI(i,j+1,bi,bj) = taudy_SI(i,j+1,bi,bj) + |
| 212 |
& .5 * dxG(i,j+1,bi,bj) * neu_val ! note negative sign is due to direction of normal vector |
| 213 |
taudy_SI(i+1,j+1,bi,bj) = taudy_SI(i+1,j+1,bi,bj) + |
| 214 |
& .5 * dxG(i,j+1,bi,bj) * neu_val |
| 215 |
ENDIF |
| 216 |
|
| 217 |
ENDIF |
| 218 |
ENDDO |
| 219 |
ENDDO |
| 220 |
ENDDO |
| 221 |
ENDDO |
| 222 |
|
| 223 |
|
| 224 |
|
| 225 |
#endif |
| 226 |
RETURN |
| 227 |
END |
| 228 |
|
| 229 |
|
Parent Directory
| 
Revision Log
| 
Revision Graph