| 1 |
jmc |
1.19 |
C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_calc_strainrates.F,v 1.18 2011/10/21 17:32:01 jmc Exp $ |
| 2 |
mlosch |
1.1 |
C $Name: $ |
| 3 |
|
|
|
| 4 |
|
|
#include "SEAICE_OPTIONS.h" |
| 5 |
jmc |
1.18 |
#ifdef ALLOW_OBCS |
| 6 |
|
|
# include "OBCS_OPTIONS.h" |
| 7 |
|
|
#else |
| 8 |
|
|
# define OBCS_UVICE_OLD |
| 9 |
|
|
#endif |
| 10 |
mlosch |
1.1 |
|
| 11 |
jmc |
1.18 |
CBOP |
| 12 |
|
|
C !ROUTINE: SEAICE_CALC_STRAINRATES |
| 13 |
|
|
C !INTERFACE: |
| 14 |
jmc |
1.8 |
SUBROUTINE SEAICE_CALC_STRAINRATES( |
| 15 |
mlosch |
1.1 |
I uFld, vFld, |
| 16 |
mlosch |
1.12 |
O e11Loc, e22Loc, e12Loc, |
| 17 |
mlosch |
1.14 |
I iStep, myTime, myIter, myThid ) |
| 18 |
jmc |
1.18 |
|
| 19 |
|
|
C !DESCRIPTION: \bv |
| 20 |
|
|
C *==========================================================* |
| 21 |
|
|
C | SUBROUTINE SEAICE_CALC_STRAINRATES |
| 22 |
|
|
C | o compute strain rates from ice velocities |
| 23 |
|
|
C *==========================================================* |
| 24 |
|
|
C | written by Martin Losch, Apr 2007 |
| 25 |
|
|
C *==========================================================* |
| 26 |
|
|
C \ev |
| 27 |
|
|
|
| 28 |
|
|
C !USES: |
| 29 |
mlosch |
1.1 |
IMPLICIT NONE |
| 30 |
|
|
|
| 31 |
|
|
C === Global variables === |
| 32 |
|
|
#include "SIZE.h" |
| 33 |
|
|
#include "EEPARAMS.h" |
| 34 |
|
|
#include "PARAMS.h" |
| 35 |
|
|
#include "GRID.h" |
| 36 |
jmc |
1.19 |
#include "SEAICE_SIZE.h" |
| 37 |
mlosch |
1.1 |
#include "SEAICE_PARAMS.h" |
| 38 |
mlosch |
1.11 |
#include "SEAICE.h" |
| 39 |
mlosch |
1.1 |
|
| 40 |
|
|
#ifdef ALLOW_AUTODIFF_TAMC |
| 41 |
|
|
# include "tamc.h" |
| 42 |
|
|
#endif |
| 43 |
|
|
|
| 44 |
jmc |
1.18 |
C !INPUT/OUTPUT PARAMETERS: |
| 45 |
mlosch |
1.1 |
C === Routine arguments === |
| 46 |
jmc |
1.18 |
C uFld :: ice velocity, u-component |
| 47 |
|
|
C vFld :: ice velocity, v-component |
| 48 |
|
|
C e11Loc :: strain rate tensor, component 1,1 |
| 49 |
|
|
C e22Loc :: strain rate tensor, component 2,2 |
| 50 |
|
|
C e12Loc :: strain rate tensor, component 1,2 |
| 51 |
jmc |
1.8 |
C iStep :: Sub-time-step number |
| 52 |
|
|
C myTime :: Simulation time |
| 53 |
|
|
C myIter :: Simulation timestep number |
| 54 |
|
|
C myThid :: My Thread Id. number |
| 55 |
jmc |
1.19 |
_RL uFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 56 |
|
|
_RL vFld (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 57 |
mlosch |
1.12 |
_RL e11Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 58 |
|
|
_RL e22Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 59 |
|
|
_RL e12Loc (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 60 |
jmc |
1.18 |
INTEGER iStep |
| 61 |
|
|
_RL myTime |
| 62 |
|
|
INTEGER myIter |
| 63 |
|
|
INTEGER myThid |
| 64 |
|
|
CEOP |
| 65 |
mlosch |
1.1 |
|
| 66 |
|
|
#ifdef SEAICE_CGRID |
| 67 |
|
|
#ifdef SEAICE_ALLOW_DYNAMICS |
| 68 |
jmc |
1.18 |
C !LOCAL VARIABLES: |
| 69 |
mlosch |
1.1 |
C === Local variables === |
| 70 |
jmc |
1.18 |
C i,j,bi,bj :: Loop counters |
| 71 |
mlosch |
1.1 |
INTEGER i, j, bi, bj |
| 72 |
jmc |
1.18 |
C hFacU, hFacV :: determine the no-slip boundary condition |
| 73 |
mlosch |
1.2 |
INTEGER k |
| 74 |
mlosch |
1.11 |
_RS hFacU, hFacV, noSlipFac |
| 75 |
mlosch |
1.15 |
C auxillary variables that help writing code that |
| 76 |
|
|
C vectorizes even after TAFization |
| 77 |
|
|
_RL dudx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 78 |
|
|
_RL dvdy (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 79 |
|
|
_RL dudy (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 80 |
|
|
_RL dvdx (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 81 |
|
|
_RL uave (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 82 |
|
|
_RL vave (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 83 |
mlosch |
1.2 |
|
| 84 |
mlosch |
1.4 |
k = 1 |
| 85 |
mlosch |
1.11 |
noSlipFac = 0. _d 0 |
| 86 |
|
|
IF ( SEAICE_no_slip ) noSlipFac = 1. _d 0 |
| 87 |
mlosch |
1.1 |
C |
| 88 |
mlosch |
1.11 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 89 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 90 |
mlosch |
1.15 |
C abbreviations on C-points, need to do them in separate loops |
| 91 |
|
|
C for vectorization |
| 92 |
jmc |
1.19 |
DO j=1-OLy,sNy+OLy-1 |
| 93 |
|
|
DO i=1-OLx,sNx+OLx-1 |
| 94 |
jmc |
1.18 |
dudx(i,j) = _recip_dxF(i,j,bi,bj) * |
| 95 |
|
|
& (uFld(i+1,j,bi,bj)-uFld(i,j,bi,bj)) |
| 96 |
|
|
uave(i,j) = 0.5 _d 0 * (uFld(i,j,bi,bj)+uFld(i+1,j,bi,bj)) |
| 97 |
mlosch |
1.15 |
ENDDO |
| 98 |
|
|
ENDDO |
| 99 |
jmc |
1.19 |
DO j=1-OLy,sNy+OLy-1 |
| 100 |
|
|
DO i=1-OLx,sNx+OLx-1 |
| 101 |
jmc |
1.18 |
dvdy(i,j) = _recip_dyF(i,j,bi,bj) * |
| 102 |
|
|
& (vFld(i,j+1,bi,bj)-vFld(i,j,bi,bj)) |
| 103 |
|
|
vave(i,j) = 0.5 _d 0 * (vFld(i,j,bi,bj)+vFld(i,j+1,bi,bj)) |
| 104 |
mlosch |
1.15 |
ENDDO |
| 105 |
|
|
ENDDO |
| 106 |
|
|
C evaluate strain rates at C-points |
| 107 |
jmc |
1.19 |
DO j=1-OLy,sNy+OLy-1 |
| 108 |
|
|
DO i=1-OLx,sNx+OLx-1 |
| 109 |
jmc |
1.18 |
e11Loc(i,j,bi,bj) = dudx(i,j) + vave(i,j) * k2AtC(i,j,bi,bj) |
| 110 |
|
|
e22Loc(i,j,bi,bj) = dvdy(i,j) + uave(i,j) * k1AtC(i,j,bi,bj) |
| 111 |
|
|
ENDDO |
| 112 |
|
|
ENDDO |
| 113 |
|
|
#ifndef OBCS_UVICE_OLD |
| 114 |
|
|
C-- for OBCS: assume no gradient beyong OB |
| 115 |
jmc |
1.19 |
DO j=1-OLy,sNy+OLy-1 |
| 116 |
|
|
DO i=1-OLx,sNx+OLx-1 |
| 117 |
jmc |
1.18 |
e11Loc(i,j,bi,bj) = e11Loc(i,j,bi,bj)*maskInC(i,j,bi,bj) |
| 118 |
|
|
e22Loc(i,j,bi,bj) = e22Loc(i,j,bi,bj)*maskInC(i,j,bi,bj) |
| 119 |
mlosch |
1.11 |
ENDDO |
| 120 |
|
|
ENDDO |
| 121 |
jmc |
1.18 |
#endif /* OBCS_UVICE_OLD */ |
| 122 |
|
|
|
| 123 |
mlosch |
1.15 |
C abbreviations at Z-points, need to do them in separate loops |
| 124 |
|
|
C for vectorization |
| 125 |
jmc |
1.19 |
DO j=1-OLy+1,sNy+OLy |
| 126 |
|
|
DO i=1-OLx+1,sNx+OLx |
| 127 |
jmc |
1.18 |
dudy(i,j) = ( uFld(i,j,bi,bj) - uFld(i ,j-1,bi,bj) ) |
| 128 |
|
|
& * _recip_dyU(i,j,bi,bj) |
| 129 |
|
|
uave(i,j) = 0.5 _d 0 * (uFld(i,j,bi,bj)+uFld(i ,j-1,bi,bj)) |
| 130 |
mlosch |
1.15 |
ENDDO |
| 131 |
|
|
ENDDO |
| 132 |
jmc |
1.19 |
DO j=1-OLy+1,sNy+OLy |
| 133 |
|
|
DO i=1-OLx+1,sNx+OLx |
| 134 |
jmc |
1.18 |
dvdx(i,j) = ( vFld(i,j,bi,bj) - vFld(i-1,j ,bi,bj) ) |
| 135 |
|
|
& * _recip_dxV(i,j,bi,bj) |
| 136 |
|
|
vave(i,j) = 0.5 _d 0 * (vFld(i,j,bi,bj)+vFld(i-1,j ,bi,bj)) |
| 137 |
mlosch |
1.15 |
ENDDO |
| 138 |
|
|
ENDDO |
| 139 |
|
|
C evaluate strain rates at Z-points |
| 140 |
jmc |
1.19 |
DO j=1-OLy+1,sNy+OLy |
| 141 |
|
|
DO i=1-OLx+1,sNx+OLx |
| 142 |
mlosch |
1.11 |
hFacU = _maskW(i,j,k,bi,bj) - _maskW(i,j-1,k,bi,bj) |
| 143 |
|
|
hFacV = _maskS(i,j,k,bi,bj) - _maskS(i-1,j,k,bi,bj) |
| 144 |
jmc |
1.18 |
e12Loc(i,j,bi,bj) = 0.5 _d 0 * ( |
| 145 |
|
|
& dudy(i,j) + dvdx(i,j) |
| 146 |
|
|
& - k1AtZ(i,j,bi,bj) * vave(i,j) |
| 147 |
|
|
& - k2AtZ(i,j,bi,bj) * uave(i,j) |
| 148 |
mlosch |
1.11 |
& ) |
| 149 |
jmc |
1.18 |
& *maskC(i ,j ,k,bi,bj)*maskC(i-1,j ,k,bi,bj) |
| 150 |
|
|
& *maskC(i ,j-1,k,bi,bj)*maskC(i-1,j-1,k,bi,bj) |
| 151 |
mlosch |
1.11 |
& + 2.0 _d 0 * noSlipFac * ( |
| 152 |
jmc |
1.18 |
& 2.0 _d 0 * uave(i,j) * _recip_dyU(i,j,bi,bj) * hFacU |
| 153 |
|
|
& + 2.0 _d 0 * vave(i,j) * _recip_dxV(i,j,bi,bj) * hFacV |
| 154 |
mlosch |
1.11 |
& ) |
| 155 |
|
|
C no slip at the boundary implies u(j)+u(j-1)=0 and v(i)+v(i-1)=0 |
| 156 |
|
|
C accross the boundary; this is already accomplished by masking so |
| 157 |
|
|
C that the following lines are not necessary |
| 158 |
jmc |
1.18 |
c$$$ & - hFacV * k1AtZ(i,j,bi,bj) * vave(i,j) |
| 159 |
|
|
c$$$ & - hFacU * k2AtZ(i,j,bi,bj) * uave(i,j) |
| 160 |
mlosch |
1.11 |
ENDDO |
| 161 |
|
|
ENDDO |
| 162 |
|
|
|
| 163 |
|
|
ENDDO |
| 164 |
|
|
ENDDO |
| 165 |
gforget |
1.16 |
|
| 166 |
|
|
#ifdef ALLOW_AUTODIFF_TAMC |
| 167 |
|
|
#ifdef SEAICE_DYN_STABLE_ADJOINT |
| 168 |
|
|
cgf zero out adjoint fields to stabilize pkg/seaice dyna. adjoint |
| 169 |
|
|
CALL ZERO_ADJ( 1, e11Loc, myThid) |
| 170 |
|
|
CALL ZERO_ADJ( 1, e12Loc, myThid) |
| 171 |
|
|
CALL ZERO_ADJ( 1, e22Loc, myThid) |
| 172 |
|
|
#endif |
| 173 |
|
|
#endif /* ALLOW_AUTODIFF_TAMC */ |
| 174 |
|
|
|
| 175 |
mlosch |
1.1 |
#endif /* SEAICE_ALLOW_DYNAMICS */ |
| 176 |
|
|
#endif /* SEAICE_CGRID */ |
| 177 |
|
|
RETURN |
| 178 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph