| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/phy_suflux_sice.F,v 1.2 2004/04/08 00:14:09 jmc Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "AIM_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: SUFLUX_SICE |
| 8 |
C !INTERFACE: |
| 9 |
SUBROUTINE SUFLUX_SICE( |
| 10 |
I PSA, FMASK, EMISloc, |
| 11 |
I Tsurf, dTskin, SSR, SLRD, |
| 12 |
I T0, Q0, CDENVV, |
| 13 |
O SHF, EVAP, SLRU, |
| 14 |
O Evp0, dEvp, Slr0, dSlr, sFlx, |
| 15 |
O TSFC, TSKIN, |
| 16 |
I bi,bj,myThid) |
| 17 |
|
| 18 |
C !DESCRIPTION: \bv |
| 19 |
C *==========================================================* |
| 20 |
C | S/R SUFLUX_SICE |
| 21 |
C | o compute surface flux over sea-ice |
| 22 |
C *==========================================================* |
| 23 |
C | o contains part of original S/R SUFLUX (Speedy code) |
| 24 |
C *==========================================================* |
| 25 |
C \ev |
| 26 |
|
| 27 |
C !USES: |
| 28 |
IMPLICIT NONE |
| 29 |
|
| 30 |
C Resolution parameters |
| 31 |
|
| 32 |
C-- size for MITgcm & Physics package : |
| 33 |
#include "AIM_SIZE.h" |
| 34 |
#include "EEPARAMS.h" |
| 35 |
|
| 36 |
C-- Physics package |
| 37 |
#include "AIM_PARAMS.h" |
| 38 |
|
| 39 |
C Physical constants + functions of sigma and latitude |
| 40 |
#include "com_physcon.h" |
| 41 |
|
| 42 |
C Surface flux constants |
| 43 |
#include "com_sflcon.h" |
| 44 |
|
| 45 |
C !INPUT/OUTPUT PARAMETERS: |
| 46 |
C == Routine Arguments == |
| 47 |
C-- Input: |
| 48 |
C PSA :: norm. surface pressure [p/p0] (2-dim) |
| 49 |
C FMASK :: fractional land-sea mask (2-dim) |
| 50 |
C EMISloc:: longwave surface emissivity |
| 51 |
C Tsurf :: surface temperature (2-dim) |
| 52 |
C dTskin :: temp. correction for daily-cycle heating [K] |
| 53 |
C SSR :: sfc sw radiation (net flux) (2-dim) |
| 54 |
C SLRD :: sfc lw radiation (downward flux)(2-dim) |
| 55 |
C T0 :: near-surface air temperature (2-dim) |
| 56 |
C Q0 :: near-surface sp. humidity [g/kg](2-dim) |
| 57 |
C CDENVV :: sensible heat flux coefficient (2-dim) |
| 58 |
C-- Output: |
| 59 |
C SHF :: sensible heat flux (2-dim) |
| 60 |
C EVAP :: evaporation [g/(m^2 s)] (2-dim) |
| 61 |
C SLRU :: sfc lw radiation (upward flux) (2-dim) |
| 62 |
C Evp0 :: evaporation computed over freezing surface (Ts=0.oC) |
| 63 |
C dEvp :: evaporation derivative relative to surf. temp |
| 64 |
C Slr0 :: upward long wave radiation over freezing surf. |
| 65 |
C dSlr :: upward long wave rad. derivative relative to surf. temp |
| 66 |
C sFlx :: net heat flux (+=down) except SW, function of surf. temp Ts: |
| 67 |
C 0: Flux(Ts=0.oC) ; 1: Flux(Ts^n) ; 2: d.Flux/d.Ts(Ts^n) |
| 68 |
C TSFC :: surface temperature (clim.) (2-dim) |
| 69 |
C TSKIN :: skin surface temperature (2-dim) |
| 70 |
C-- Input: |
| 71 |
C bi,bj :: tile index |
| 72 |
C myThid :: Thread number for this instance of the routine |
| 73 |
C-- |
| 74 |
_RL PSA(NGP), FMASK(NGP), EMISloc |
| 75 |
_RL Tsurf(NGP), dTskin(NGP) |
| 76 |
_RL SSR(NGP), SLRD(NGP) |
| 77 |
_RL T0(NGP), Q0(NGP), CDENVV(NGP) |
| 78 |
|
| 79 |
_RL SHF(NGP), EVAP(NGP), SLRU(NGP) |
| 80 |
_RL Evp0(NGP), dEvp(NGP), Slr0(NGP), dSlr(NGP), sFlx(NGP,0:2) |
| 81 |
_RL TSFC(NGP), TSKIN(NGP) |
| 82 |
|
| 83 |
INTEGER bi,bj,myThid |
| 84 |
CEOP |
| 85 |
|
| 86 |
#ifdef ALLOW_AIM |
| 87 |
|
| 88 |
C-- Local variables: |
| 89 |
_RL QSAT0(NGP,2) |
| 90 |
_RL QDUMMY(1), RDUMMY(1), TS2 |
| 91 |
INTEGER J |
| 92 |
|
| 93 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 94 |
|
| 95 |
C 1.5 Define effective skin temperature to compensate for |
| 96 |
C non-linearity of heat/moisture fluxes during the daily cycle |
| 97 |
|
| 98 |
DO J=1,NGP |
| 99 |
c TSKIN(J) = Tsurf(J) + dTskin(J) |
| 100 |
c TSFC(J)=273.16 _d 0 + dTskin(J) |
| 101 |
TSKIN(J) = Tsurf(J) |
| 102 |
TSFC(J)=273.16 _d 0 |
| 103 |
ENDDO |
| 104 |
|
| 105 |
|
| 106 |
C-- 2. Computation of fluxes over land and sea |
| 107 |
|
| 108 |
C 2.1 Wind stress |
| 109 |
|
| 110 |
C 2.2 Sensible heat flux (from clim. TS over land) |
| 111 |
|
| 112 |
DO J=1,NGP |
| 113 |
SHF(J) = CDENVV(J)*CP*(TSKIN(J)-T0(J)) |
| 114 |
sFlx(J,0)= -CDENVV(J)*CP*(TSFC(J) -T0(J)) |
| 115 |
sFlx(J,1)= -SHF(J) |
| 116 |
sFlx(J,2)= -CDENVV(J)*CP |
| 117 |
ENDDO |
| 118 |
|
| 119 |
C 2.3 Evaporation |
| 120 |
|
| 121 |
CALL SHTORH (2, NGP, TSKIN, PSA, 1. _d 0, QDUMMY, dEvp, |
| 122 |
& QSAT0(1,1), myThid) |
| 123 |
CALL SHTORH (0, NGP, TSFC, PSA, 1. _d 0, QDUMMY, RDUMMY, |
| 124 |
& QSAT0(1,2), myThid) |
| 125 |
|
| 126 |
DO J=1,NGP |
| 127 |
EVAP(J) = CDENVV(J)*(QSAT0(J,1)-Q0(J)) |
| 128 |
Evp0(J) = CDENVV(J)*(QSAT0(J,2)-Q0(J)) |
| 129 |
dEvp(J) = CDENVV(J)*dEvp(J) |
| 130 |
ENDDO |
| 131 |
|
| 132 |
C 2.4 Emission of lw radiation from the surface |
| 133 |
|
| 134 |
DO J=1,NGP |
| 135 |
TS2 = TSFC(J)*TSFC(J) |
| 136 |
Slr0(J) = SBC*TS2*TS2 |
| 137 |
TS2 = TSKIN(J)*TSKIN(J) |
| 138 |
SLRU(J) = SBC*TS2*TS2 |
| 139 |
dSlr(J) = 4. _d 0 *SBC*TS2*TSKIN(J) |
| 140 |
ENDDO |
| 141 |
|
| 142 |
C-- Compute net surface heat flux and its derivative ./. surf. temp. |
| 143 |
DO J=1,NGP |
| 144 |
sFlx(J,0)= sFlx(J,0) |
| 145 |
& - ALHC*Evp0(J) - EMISloc*Slr0(J) + SLRD(J) |
| 146 |
sFlx(J,1)= sFlx(J,1) |
| 147 |
& - ALHC*EVAP(J) - EMISloc*SLRU(J) + SLRD(J) |
| 148 |
sFlx(J,2)= sFlx(J,2) |
| 149 |
& - ALHC*dEvp(J) - EMISloc*dSlr(J) |
| 150 |
ENDDO |
| 151 |
IF ( aim_energPrecip ) THEN |
| 152 |
C- Evap of snow/ice: substract Latent Heat of freezing from heatFlux |
| 153 |
DO J=1,NGP |
| 154 |
sFlx(J,0) = sFlx(J,0) - ALHF*Evp0(J) |
| 155 |
sFlx(J,1) = sFlx(J,1) - ALHF*EVAP(J) |
| 156 |
sFlx(J,2) = sFlx(J,2) - ALHF*dEvp(J) |
| 157 |
ENDDO |
| 158 |
ENDIF |
| 159 |
|
| 160 |
C-- 3. Adjustment of skin temperature and fluxes over land |
| 161 |
C-- based on energy balance (to be implemented) |
| 162 |
C <= done separately for each surface type (land,ocean,sea-ice) |
| 163 |
|
| 164 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 165 |
#endif /* ALLOW_AIM */ |
| 166 |
|
| 167 |
RETURN |
| 168 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph