| 1 |
mlosch |
1.5 |
C $Header: /u/gcmpack/MITgcm/pkg/exf/exf_wind.F,v 1.4 2007/01/10 21:44:38 jmc Exp $ |
| 2 |
jmc |
1.4 |
C $Name: $ |
| 3 |
heimbach |
1.1 |
|
| 4 |
|
|
#include "EXF_OPTIONS.h" |
| 5 |
|
|
|
| 6 |
|
|
subroutine exf_wind(mytime, myiter, mythid) |
| 7 |
|
|
|
| 8 |
|
|
c ================================================================== |
| 9 |
|
|
c SUBROUTINE exf_wind |
| 10 |
|
|
c ================================================================== |
| 11 |
|
|
c |
| 12 |
|
|
c o Prepare wind speed and stress fields |
| 13 |
|
|
c |
| 14 |
|
|
c ================================================================== |
| 15 |
|
|
c SUBROUTINE exf_wind |
| 16 |
|
|
c ================================================================== |
| 17 |
|
|
|
| 18 |
|
|
implicit none |
| 19 |
|
|
|
| 20 |
|
|
c == global variables == |
| 21 |
|
|
|
| 22 |
jmc |
1.4 |
#include "SIZE.h" |
| 23 |
heimbach |
1.1 |
#include "EEPARAMS.h" |
| 24 |
|
|
#include "PARAMS.h" |
| 25 |
jmc |
1.4 |
c #include "DYNVARS.h" |
| 26 |
|
|
c #include "GRID.h" |
| 27 |
heimbach |
1.1 |
|
| 28 |
|
|
#include "exf_param.h" |
| 29 |
|
|
#include "exf_fields.h" |
| 30 |
|
|
#include "exf_constants.h" |
| 31 |
|
|
|
| 32 |
|
|
#ifdef ALLOW_AUTODIFF_TAMC |
| 33 |
|
|
#include "tamc.h" |
| 34 |
|
|
#endif |
| 35 |
|
|
|
| 36 |
|
|
c == routine arguments == |
| 37 |
|
|
|
| 38 |
|
|
integer mythid |
| 39 |
|
|
integer myiter |
| 40 |
|
|
_RL mytime |
| 41 |
|
|
|
| 42 |
|
|
c == local variables == |
| 43 |
|
|
|
| 44 |
|
|
integer bi,bj |
| 45 |
jmc |
1.4 |
integer i,j |
| 46 |
heimbach |
1.1 |
|
| 47 |
|
|
_RL ustmp |
| 48 |
mlosch |
1.5 |
_RL ustar |
| 49 |
|
|
_RL tmp1, tmp2, tmp3, tmp4, tmp5 |
| 50 |
heimbach |
1.1 |
|
| 51 |
|
|
c == external functions == |
| 52 |
|
|
|
| 53 |
|
|
integer ilnblnk |
| 54 |
|
|
external ilnblnk |
| 55 |
|
|
|
| 56 |
|
|
c == end of interface == |
| 57 |
|
|
|
| 58 |
|
|
c-- Use atmospheric state to compute surface fluxes. |
| 59 |
|
|
|
| 60 |
|
|
c Loop over tiles. |
| 61 |
|
|
do bj = mybylo(mythid),mybyhi(mythid) |
| 62 |
|
|
do bi = mybxlo(mythid),mybxhi(mythid) |
| 63 |
|
|
do j = 1,sny |
| 64 |
|
|
do i = 1,snx |
| 65 |
|
|
c |
| 66 |
|
|
c-- Initialise |
| 67 |
|
|
us(i,j,bi,bj) = 0. _d 0 |
| 68 |
|
|
cw(i,j,bi,bj) = 0. _d 0 |
| 69 |
|
|
sw(i,j,bi,bj) = 0. _d 0 |
| 70 |
|
|
sh(i,j,bi,bj) = 0. _d 0 |
| 71 |
|
|
c |
| 72 |
|
|
#ifdef ALLOW_ATM_WIND |
| 73 |
|
|
c Wind speed and direction. |
| 74 |
|
|
ustmp = uwind(i,j,bi,bj)*uwind(i,j,bi,bj) + |
| 75 |
|
|
& vwind(i,j,bi,bj)*vwind(i,j,bi,bj) |
| 76 |
|
|
if ( ustmp .ne. 0. _d 0 ) then |
| 77 |
|
|
us(i,j,bi,bj) = sqrt(ustmp) |
| 78 |
|
|
cw(i,j,bi,bj) = uwind(i,j,bi,bj)/us(i,j,bi,bj) |
| 79 |
|
|
sw(i,j,bi,bj) = vwind(i,j,bi,bj)/us(i,j,bi,bj) |
| 80 |
|
|
else |
| 81 |
|
|
us(i,j,bi,bj) = 0. _d 0 |
| 82 |
|
|
cw(i,j,bi,bj) = 0. _d 0 |
| 83 |
|
|
sw(i,j,bi,bj) = 0. _d 0 |
| 84 |
|
|
endif |
| 85 |
|
|
#else /* ifndef ALLOW_ATM_WIND */ |
| 86 |
|
|
c |
| 87 |
|
|
c The variables us, sh and rdn have to be computed from |
| 88 |
|
|
c given wind stresses inverting relationship for neutral |
| 89 |
|
|
c drag coeff. cdn. |
| 90 |
|
|
c The inversion is based on linear and quadratic form of |
| 91 |
|
|
c cdn(umps); ustar can be directly computed from stress; |
| 92 |
jmc |
1.4 |
C- no need for wind-stress inversion since everything |
| 93 |
|
|
C (ustar, ... etc ...) is derived directly from wind-stress |
| 94 |
heimbach |
1.1 |
|
| 95 |
mlosch |
1.5 |
ustmp = ustress(i,j,bi,bj)*ustress(i,j,bi,bj) + |
| 96 |
|
|
& vstress(i,j,bi,bj)*vstress(i,j,bi,bj) |
| 97 |
|
|
if ( ustmp .ne. 0. _d 0 ) then |
| 98 |
|
|
ustar = sqrt(ustmp/atmrho) |
| 99 |
|
|
cw(i,j,bi,bj) = ustress(i,j,bi,bj)/sqrt(ustmp) |
| 100 |
|
|
sw(i,j,bi,bj) = vstress(i,j,bi,bj)/sqrt(ustmp) |
| 101 |
|
|
else |
| 102 |
|
|
ustar = 0. _d 0 |
| 103 |
|
|
cw(i,j,bi,bj) = 0. _d 0 |
| 104 |
|
|
sw(i,j,bi,bj) = 0. _d 0 |
| 105 |
|
|
endif |
| 106 |
|
|
|
| 107 |
|
|
if ( ustar .eq. 0. _d 0 ) then |
| 108 |
|
|
us(i,j,bi,bj) = 0. _d 0 |
| 109 |
|
|
else if ( ustar .lt. ustofu11 ) then |
| 110 |
|
|
tmp1 = -cquadrag_2/cquadrag_1/2 |
| 111 |
|
|
tmp2 = sqrt(tmp1*tmp1 + ustar*ustar/cquadrag_1) |
| 112 |
|
|
us(i,j,bi,bj) = sqrt(tmp1 + tmp2) |
| 113 |
|
|
else |
| 114 |
|
|
tmp3 = clindrag_2/clindrag_1/3 |
| 115 |
|
|
tmp4 = ustar*ustar/clindrag_1/2 - tmp3**3 |
| 116 |
|
|
tmp5 = sqrt(ustar*ustar/clindrag_1* |
| 117 |
|
|
& (ustar*ustar/clindrag_1/4 - tmp3**3)) |
| 118 |
|
|
us(i,j,bi,bj) = (tmp4 + tmp5)**(1/3) + |
| 119 |
|
|
& tmp3**2 * (tmp4 + tmp5)**(-1/3) - tmp3 |
| 120 |
|
|
endif |
| 121 |
|
|
uwind(i,j,bi,bj) = us(i,j,bi,bj)*cw(i,j,bi,bj) |
| 122 |
|
|
vwind(i,j,bi,bj) = us(i,j,bi,bj)*sw(i,j,bi,bj) |
| 123 |
heimbach |
1.1 |
#endif /* ifndef ALLOW_ATM_WIND */ |
| 124 |
|
|
|
| 125 |
|
|
c-- set lower limit |
| 126 |
|
|
sh(i,j,bi,bj) = max(us(i,j,bi,bj),umin) |
| 127 |
|
|
|
| 128 |
jmc |
1.4 |
c-- if wspeed available, overwrite sh, |
| 129 |
heimbach |
1.1 |
c-- otherwise fill wspeed array for later use |
| 130 |
|
|
if ( wspeedfile .NE. ' ' ) then |
| 131 |
mlosch |
1.2 |
us(i,j,bi,bj) = wspeed(i,j,bi,bj) |
| 132 |
heimbach |
1.1 |
sh(i,j,bi,bj) = max(wspeed(i,j,bi,bj),umin) |
| 133 |
|
|
else |
| 134 |
|
|
wspeed(i,j,bi,bj) = sh(i,j,bi,bj) |
| 135 |
|
|
endif |
| 136 |
|
|
|
| 137 |
|
|
enddo |
| 138 |
|
|
enddo |
| 139 |
|
|
enddo |
| 140 |
|
|
enddo |
| 141 |
|
|
|
| 142 |
mlosch |
1.3 |
return |
| 143 |
heimbach |
1.1 |
end |
Parent Directory
| 
Revision Log
| 
Revision Graph