| 1 |
jmc |
1.4 |
C $Header: /u/gcmpack/MITgcm/pkg/land/land_stepfwd.F,v 1.3 2004/05/14 16:14:48 jmc Exp $ |
| 2 |
jmc |
1.1 |
C $Name: $ |
| 3 |
|
|
|
| 4 |
|
|
#include "LAND_OPTIONS.h" |
| 5 |
|
|
|
| 6 |
|
|
CBOP |
| 7 |
|
|
C !ROUTINE: LAND_STEPFWD |
| 8 |
|
|
C !INTERFACE: |
| 9 |
|
|
SUBROUTINE LAND_STEPFWD( |
| 10 |
|
|
I land_frc, bi, bj, myTime, myIter, myThid) |
| 11 |
|
|
|
| 12 |
|
|
C !DESCRIPTION: \bv |
| 13 |
|
|
C *==========================================================* |
| 14 |
|
|
C | S/R LAND_STEPFWD |
| 15 |
|
|
C | o Land model main S/R: step forward land variables |
| 16 |
|
|
C *==========================================================* |
| 17 |
|
|
C \ev |
| 18 |
|
|
|
| 19 |
|
|
C !USES: |
| 20 |
|
|
IMPLICIT NONE |
| 21 |
|
|
|
| 22 |
|
|
C == Global variables === |
| 23 |
|
|
C-- size for MITgcm & Land package : |
| 24 |
|
|
#include "LAND_SIZE.h" |
| 25 |
|
|
|
| 26 |
|
|
#include "EEPARAMS.h" |
| 27 |
|
|
#include "LAND_PARAMS.h" |
| 28 |
|
|
#include "LAND_VARS.h" |
| 29 |
|
|
|
| 30 |
|
|
C !INPUT/OUTPUT PARAMETERS: |
| 31 |
|
|
C == Routine arguments == |
| 32 |
|
|
C land_frc :: land fraction [0-1] |
| 33 |
|
|
C bi,bj :: Tile index |
| 34 |
|
|
C myTime :: Current time of simulation ( s ) |
| 35 |
|
|
C myIter :: Current iteration number in simulation |
| 36 |
|
|
C myThid :: Number of this instance of the routine |
| 37 |
|
|
_RS land_frc(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
| 38 |
|
|
INTEGER bi, bj, myIter, myThid |
| 39 |
|
|
_RL myTime |
| 40 |
|
|
CEOP |
| 41 |
|
|
|
| 42 |
|
|
#ifdef ALLOW_LAND |
| 43 |
|
|
C == Local variables == |
| 44 |
|
|
C i,j,k :: loop counters |
| 45 |
|
|
C kp1 :: k+1 |
| 46 |
jmc |
1.2 |
C grd_HeatCp :: Heat capacity of the ground [J/m3/K] |
| 47 |
jmc |
1.3 |
C enthalpGrdW :: enthalpy of ground water [J/m3] |
| 48 |
jmc |
1.1 |
C fieldCapac :: field capacity (of water) [m] |
| 49 |
jmc |
1.2 |
C mWater :: water content of the ground [kg/m3] |
| 50 |
jmc |
1.3 |
C groundWnp1 :: hold temporary future soil moisture [] |
| 51 |
|
|
C grdWexcess :: ground water in excess [m/s] |
| 52 |
jmc |
1.1 |
C fractRunOff :: fraction of water in excess which leaves as runoff |
| 53 |
jmc |
1.2 |
C flxkup :: downward flux of water, upper interface (k-1,k) |
| 54 |
|
|
C flxdwn :: downward flux of water, lower interface (k,k+1) |
| 55 |
jmc |
1.3 |
C flxEngU :: downward energy flux associated with water flux (W/m2) |
| 56 |
|
|
C upper interface (k-1,k) |
| 57 |
|
|
C flxEngL :: downward energy flux associated with water flux (W/m2) |
| 58 |
|
|
C lower interface (k,k+1) |
| 59 |
jmc |
1.2 |
C temp_af :: ground temperature if above freezing |
| 60 |
|
|
C temp_bf :: ground temperature if below freezing |
| 61 |
|
|
C mPmE :: hold temporary (liquid) Precip minus Evap [kg/m2/s] |
| 62 |
|
|
C enWfx :: hold temporary energy flux of Precip [W/m2] |
| 63 |
|
|
C enGr1 :: ground enthalpy of level 1 [J/m2] |
| 64 |
|
|
C mSnow :: mass of snow [kg/m2] |
| 65 |
|
|
C dMsn :: mass of melting snow [kg/m2] |
| 66 |
|
|
C snowPrec :: snow precipitation [kg/m2/s] |
| 67 |
|
|
C hNewSnow :: fresh snow accumulation [m] |
| 68 |
jmc |
1.3 |
C dhSnowMx :: potential snow increase [m] |
| 69 |
|
|
C dhSnow :: effective snow increase [m] |
| 70 |
|
|
C mIceDt :: ground-ice growth rate (<- excess of snow) [kg/m2/s] |
| 71 |
jmc |
1.2 |
C ageFac :: snow aging factor [1] |
| 72 |
jmc |
1.3 |
_RL grd_HeatCp, enthalpGrdW |
| 73 |
|
|
_RL fieldCapac, mWater |
| 74 |
|
|
_RL groundWnp1, grdWexcess, fractRunOff |
| 75 |
jmc |
1.1 |
_RL flxkup(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 76 |
|
|
_RL flxkdw(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 77 |
jmc |
1.3 |
_RL flxEngU(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
| 78 |
|
|
_RL flxEngL, temp_af, temp_bf, mPmE, enWfx, enGr1 |
| 79 |
|
|
_RL mSnow, dMsn, snowPrec |
| 80 |
|
|
_RL hNewSnow, dhSnowMx, dhSnow, mIceDt, ageFac |
| 81 |
jmc |
1.1 |
INTEGER i,j,k,kp1 |
| 82 |
|
|
|
| 83 |
jmc |
1.2 |
IF (land_calc_grT .AND. .NOT.land_impl_grT ) THEN |
| 84 |
jmc |
1.1 |
C-- Step forward ground temperature: |
| 85 |
|
|
|
| 86 |
|
|
DO k=1,land_nLev |
| 87 |
|
|
kp1 = MIN(k+1,land_nLev) |
| 88 |
|
|
|
| 89 |
|
|
IF (k.EQ.1) THEN |
| 90 |
|
|
DO j=1,sNy |
| 91 |
|
|
DO i=1,sNx |
| 92 |
|
|
flxkup(i,j) = land_HeatFlx(i,j,bi,bj) |
| 93 |
|
|
ENDDO |
| 94 |
|
|
ENDDO |
| 95 |
|
|
ELSE |
| 96 |
|
|
DO j=1,sNy |
| 97 |
|
|
DO i=1,sNx |
| 98 |
|
|
flxkup(i,j) = flxkdw(i,j) |
| 99 |
|
|
ENDDO |
| 100 |
|
|
ENDDO |
| 101 |
|
|
ENDIF |
| 102 |
|
|
|
| 103 |
|
|
DO j=1,sNy |
| 104 |
|
|
DO i=1,sNx |
| 105 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
| 106 |
|
|
C- Thermal conductivity flux, lower interface (k,k+1): |
| 107 |
|
|
flxkdw(i,j) = land_grdLambda* |
| 108 |
|
|
& ( land_groundT(i,j,k,bi,bj) |
| 109 |
|
|
& -land_groundT(i,j,kp1,bi,bj) ) |
| 110 |
|
|
& *land_rec_dzC(kp1) |
| 111 |
|
|
|
| 112 |
jmc |
1.2 |
C- Step forward ground enthalpy, level k : |
| 113 |
|
|
land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
| 114 |
|
|
& + land_deltaT * (flxkup(i,j)-flxkdw(i,j))/land_dzF(k) |
| 115 |
jmc |
1.1 |
|
| 116 |
|
|
ENDIF |
| 117 |
|
|
ENDDO |
| 118 |
|
|
ENDDO |
| 119 |
|
|
|
| 120 |
|
|
ENDDO |
| 121 |
|
|
C-- step forward ground temperature: end |
| 122 |
|
|
ENDIF |
| 123 |
|
|
|
| 124 |
jmc |
1.2 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 125 |
|
|
|
| 126 |
jmc |
1.4 |
IF ( land_calc_grW .OR. land_calc_snow ) THEN |
| 127 |
jmc |
1.3 |
C-- Initialize run-off arrays. |
| 128 |
|
|
DO j=1,sNy |
| 129 |
|
|
DO i=1,sNx |
| 130 |
|
|
land_runOff(i,j,bi,bj) = 0. _d 0 |
| 131 |
|
|
land_enRnOf(i,j,bi,bj) = 0. _d 0 |
| 132 |
|
|
ENDDO |
| 133 |
|
|
ENDDO |
| 134 |
jmc |
1.4 |
ENDIF |
| 135 |
|
|
|
| 136 |
|
|
#ifdef LAND_OLD_VERSION |
| 137 |
|
|
IF ( .TRUE. ) THEN |
| 138 |
|
|
#else |
| 139 |
|
|
IF ( land_calc_grW ) THEN |
| 140 |
|
|
#endif |
| 141 |
jmc |
1.2 |
C-- need (later on) ground temp. to be consistent with updated enthalpy: |
| 142 |
|
|
DO k=1,land_nLev |
| 143 |
|
|
DO j=1,sNy |
| 144 |
|
|
DO i=1,sNx |
| 145 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
| 146 |
|
|
mWater = land_rhoLiqW*land_waterCap |
| 147 |
|
|
& *land_groundW(i,j,k,bi,bj) |
| 148 |
|
|
grd_HeatCp = land_heatCs + land_CpWater*mWater |
| 149 |
|
|
temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
| 150 |
|
|
& / grd_HeatCp |
| 151 |
|
|
temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
| 152 |
|
|
land_groundT(i,j,k,bi,bj) = |
| 153 |
|
|
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
| 154 |
|
|
ENDIF |
| 155 |
|
|
ENDDO |
| 156 |
|
|
ENDDO |
| 157 |
|
|
ENDDO |
| 158 |
|
|
ENDIF |
| 159 |
|
|
|
| 160 |
|
|
IF ( land_calc_snow ) THEN |
| 161 |
|
|
C-- Step forward Snow thickness (also account for rain temperature) |
| 162 |
|
|
ageFac = 1. _d 0 - land_deltaT/timeSnowAge |
| 163 |
|
|
DO j=1,sNy |
| 164 |
|
|
DO i=1,sNx |
| 165 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
| 166 |
|
|
mPmE = land_Pr_m_Ev(i,j,bi,bj) |
| 167 |
|
|
enWfx = land_EnWFlux(i,j,bi,bj) |
| 168 |
|
|
enGr1 = land_enthalp(i,j,1,bi,bj)*land_dzF(1) |
| 169 |
|
|
C- snow aging: |
| 170 |
|
|
land_snowAge(i,j,bi,bj) = |
| 171 |
|
|
& ( land_deltaT + land_snowAge(i,j,bi,bj)*ageFac ) |
| 172 |
|
|
IF ( enWfx.LT.0. ) THEN |
| 173 |
|
|
C- snow precip in excess (Snow > Evap) : |
| 174 |
|
|
C => start to melt (until ground at freezing point) and then accumulate |
| 175 |
|
|
snowPrec = -enWfx -MAX( enGr1/land_deltaT, 0. _d 0 ) |
| 176 |
|
|
snowPrec = MAX( snowPrec*recip_Lfreez , 0. _d 0 ) |
| 177 |
|
|
mPmE = mPmE - snowPrec |
| 178 |
jmc |
1.3 |
flxEngU(i,j) = enWfx + land_Lfreez*snowPrec |
| 179 |
jmc |
1.2 |
hNewSnow = land_deltaT * snowPrec / land_rhoSnow |
| 180 |
|
|
C- refresh snow age: |
| 181 |
|
|
land_snowAge(i,j,bi,bj) = land_snowAge(i,j,bi,bj) |
| 182 |
|
|
& *EXP( -hNewSnow/hNewSnowAge ) |
| 183 |
jmc |
1.3 |
C- update snow thickness: |
| 184 |
|
|
c land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + hNewSnow |
| 185 |
|
|
C glacier & ice-sheet missing: excess of snow put directly into run-off |
| 186 |
|
|
dhSnowMx = MAX( 0. _d 0, |
| 187 |
|
|
& land_hMaxSnow - land_hSnow(i,j,bi,bj) ) |
| 188 |
|
|
dhSnow = MIN( hNewSnow, dhSnowMx ) |
| 189 |
|
|
land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + dhSnow |
| 190 |
|
|
mIceDt = land_rhoSnow * (hNewSnow-dhSnow) / land_deltaT |
| 191 |
|
|
land_runOff(i,j,bi,bj) = mIceDt/land_rhoLiqW |
| 192 |
|
|
land_enRnOf(i,j,bi,bj) = -mIceDt*land_Lfreez |
| 193 |
jmc |
1.2 |
ELSE |
| 194 |
|
|
C- rain precip (whatever Evap is) or Evap exceeds snow precip : |
| 195 |
|
|
C => snow melts or sublimates |
| 196 |
|
|
c snowMelt = MIN( enWfx*recip_Lfreez , |
| 197 |
|
|
c & land_hSnow(i,j,bi,bj)*land_rhoSnow/land_deltaT ) |
| 198 |
|
|
mSnow = land_hSnow(i,j,bi,bj)*land_rhoSnow |
| 199 |
|
|
dMsn = enWfx*recip_Lfreez*land_deltaT |
| 200 |
|
|
IF ( dMsn .GE. mSnow ) THEN |
| 201 |
|
|
dMsn = mSnow |
| 202 |
|
|
land_hSnow(i,j,bi,bj) = 0. _d 0 |
| 203 |
jmc |
1.3 |
flxEngU(i,j) = enWfx - land_Lfreez*mSnow/land_deltaT |
| 204 |
jmc |
1.2 |
ELSE |
| 205 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
| 206 |
jmc |
1.2 |
land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) |
| 207 |
|
|
& - dMsn / land_rhoSnow |
| 208 |
|
|
ENDIF |
| 209 |
|
|
c IF (mPmE.GT.0.) land_snowAge(i,j,bi,bj) = timeSnowAge |
| 210 |
|
|
mPmE = mPmE + dMsn/land_deltaT |
| 211 |
|
|
ENDIF |
| 212 |
|
|
flxkup(i,j) = mPmE/land_rhoLiqW |
| 213 |
|
|
c land_Pr_m_Ev(i,j,bi,bj) = mPmE |
| 214 |
|
|
IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) |
| 215 |
|
|
& land_snowAge(i,j,bi,bj) = 0. _d 0 |
| 216 |
|
|
C- avoid negative (but very small, < 1.e-34) hSnow that occurs because |
| 217 |
|
|
C of truncation error. Might need to rewrite this part. |
| 218 |
|
|
c IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) THEN |
| 219 |
|
|
c land_hSnow(i,j,bi,bj) = 0. _d 0 |
| 220 |
|
|
c land_snowAge(i,j,bi,bj) = 0. _d 0 |
| 221 |
|
|
c ENDIF |
| 222 |
|
|
ENDIF |
| 223 |
|
|
ENDDO |
| 224 |
|
|
ENDDO |
| 225 |
|
|
ELSE |
| 226 |
|
|
DO j=1,sNy |
| 227 |
|
|
DO i=1,sNx |
| 228 |
|
|
flxkup(i,j) = land_Pr_m_Ev(i,j,bi,bj)/land_rhoLiqW |
| 229 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
| 230 |
jmc |
1.2 |
ENDDO |
| 231 |
|
|
ENDDO |
| 232 |
|
|
ENDIF |
| 233 |
|
|
|
| 234 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 235 |
|
|
|
| 236 |
jmc |
1.1 |
IF (land_calc_grW) THEN |
| 237 |
|
|
C-- Step forward ground Water: |
| 238 |
|
|
|
| 239 |
|
|
DO k=1,land_nLev |
| 240 |
|
|
IF (k.EQ.land_nLev) THEN |
| 241 |
|
|
kp1 = k |
| 242 |
|
|
fractRunOff = 1. _d 0 |
| 243 |
|
|
ELSE |
| 244 |
|
|
kp1 = k+1 |
| 245 |
|
|
fractRunOff = land_fractRunOff |
| 246 |
|
|
ENDIF |
| 247 |
|
|
fieldCapac = land_waterCap*land_dzF(k) |
| 248 |
|
|
|
| 249 |
|
|
DO j=1,sNy |
| 250 |
|
|
DO i=1,sNx |
| 251 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
| 252 |
jmc |
1.3 |
|
| 253 |
|
|
#ifdef LAND_OLD_VERSION |
| 254 |
|
|
IF ( .TRUE. ) THEN |
| 255 |
|
|
IF ( k.EQ.land_nLev ) THEN |
| 256 |
|
|
#else |
| 257 |
|
|
IF ( land_groundT(i,j,k,bi,bj).LT.0. _d 0 ) THEN |
| 258 |
|
|
C- Frozen level: only account for upper level fluxes |
| 259 |
|
|
IF ( flxkup(i,j) .LT. 0. _d 0 ) THEN |
| 260 |
|
|
C- Step forward soil moisture (& enthapy), level k : |
| 261 |
|
|
land_groundW(i,j,k,bi,bj) = land_groundW(i,j,k,bi,bj) |
| 262 |
|
|
& + land_deltaT * flxkup(i,j) / fieldCapac |
| 263 |
|
|
IF ( land_calc_snow ) |
| 264 |
|
|
& land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
| 265 |
|
|
& + land_deltaT * flxEngU(i,j) / land_dzF(k) |
| 266 |
|
|
ELSE |
| 267 |
|
|
C- Frozen level: incoming water flux goes directly into run-off |
| 268 |
|
|
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
| 269 |
|
|
& + flxkup(i,j) |
| 270 |
|
|
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
| 271 |
|
|
& + flxEngU(i,j) |
| 272 |
|
|
ENDIF |
| 273 |
|
|
C- prepare fluxes for next level: |
| 274 |
|
|
flxkup(i,j) = 0. _d 0 |
| 275 |
|
|
flxEngU(i,j) = 0. _d 0 |
| 276 |
|
|
|
| 277 |
|
|
ELSE |
| 278 |
|
|
|
| 279 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 280 |
jmc |
1.2 |
C- Diffusion flux of water, lower interface (k,k+1): |
| 281 |
jmc |
1.3 |
IF ( k.EQ.land_nLev .OR. |
| 282 |
|
|
& land_groundT(i,j,kp1,bi,bj).LT.0. _d 0 ) THEN |
| 283 |
|
|
#endif /* LAND_OLD_VERSION */ |
| 284 |
|
|
C- no Diffusion of water if one level is frozen : |
| 285 |
|
|
flxkdw(i,j) = 0. _d 0 |
| 286 |
|
|
flxEngL = 0. _d 0 |
| 287 |
|
|
ELSE |
| 288 |
|
|
flxkdw(i,j) = fieldCapac* |
| 289 |
|
|
& ( land_groundW(i,j,k,bi,bj) |
| 290 |
|
|
& -land_groundW(i,j,kp1,bi,bj) ) |
| 291 |
|
|
& / land_wTauDiff |
| 292 |
|
|
C- energy flux associated with water flux: take upwind Temp |
| 293 |
|
|
IF ( flxkdw(i,j).GE.0. ) THEN |
| 294 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
| 295 |
|
|
& *land_groundT(i,j,k,bi,bj) |
| 296 |
|
|
ELSE |
| 297 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
| 298 |
|
|
& *land_groundT(i,j,kp1,bi,bj) |
| 299 |
|
|
ENDIF |
| 300 |
|
|
ENDIF |
| 301 |
jmc |
1.1 |
|
| 302 |
|
|
C- Step forward soil moisture, level k : |
| 303 |
jmc |
1.3 |
groundWnp1 = land_groundW(i,j,k,bi,bj) |
| 304 |
jmc |
1.2 |
& + land_deltaT * (flxkup(i,j)-flxkdw(i,j)) / fieldCapac |
| 305 |
jmc |
1.3 |
|
| 306 |
|
|
C- Water in excess will leave as run-off or go to level below |
| 307 |
|
|
land_groundW(i,j,k,bi,bj) = MIN(1. _d 0, groundWnp1) |
| 308 |
|
|
grdWexcess = ( groundWnp1 - MIN(1. _d 0, groundWnp1) ) |
| 309 |
|
|
& *fieldCapac/land_deltaT |
| 310 |
jmc |
1.1 |
|
| 311 |
|
|
C- Run off: fraction 1-fractRunOff enters level below |
| 312 |
jmc |
1.3 |
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
| 313 |
|
|
& + fractRunOff*grdWexcess |
| 314 |
|
|
C- prepare fluxes for next level: |
| 315 |
|
|
flxkup(i,j) = flxkdw(i,j) |
| 316 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess |
| 317 |
|
|
|
| 318 |
|
|
IF ( land_calc_snow ) THEN |
| 319 |
|
|
enthalpGrdW = land_rhoLiqW*land_CpWater |
| 320 |
|
|
& *land_groundT(i,j,k,bi,bj) |
| 321 |
|
|
C-- Account for water fluxes in energy budget: update ground Enthalpy |
| 322 |
|
|
land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
| 323 |
|
|
& + ( flxEngU(i,j) - flxEngL - grdWexcess*enthalpGrdW |
| 324 |
|
|
& )*land_deltaT/land_dzF(k) |
| 325 |
|
|
|
| 326 |
|
|
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
| 327 |
|
|
& + fractRunOff*grdWexcess*enthalpGrdW |
| 328 |
|
|
C- prepare fluxes for next level: |
| 329 |
|
|
flxEngU(i,j) = flxEngL |
| 330 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess*enthalpGrdW |
| 331 |
|
|
ENDIF |
| 332 |
jmc |
1.2 |
ENDIF |
| 333 |
jmc |
1.3 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 334 |
jmc |
1.2 |
|
| 335 |
jmc |
1.1 |
ENDIF |
| 336 |
|
|
ENDDO |
| 337 |
|
|
ENDDO |
| 338 |
|
|
|
| 339 |
|
|
ENDDO |
| 340 |
|
|
C-- step forward ground Water: end |
| 341 |
jmc |
1.2 |
ENDIF |
| 342 |
|
|
|
| 343 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
| 344 |
|
|
|
| 345 |
jmc |
1.3 |
IF ( land_calc_grT ) THEN |
| 346 |
|
|
C-- Compute ground temperature from enthalpy (if not already done): |
| 347 |
jmc |
1.2 |
|
| 348 |
|
|
DO k=1,land_nLev |
| 349 |
|
|
DO j=1,sNy |
| 350 |
|
|
DO i=1,sNx |
| 351 |
|
|
C- Ground Heat capacity, layer k: |
| 352 |
|
|
mWater = land_rhoLiqW*land_waterCap |
| 353 |
|
|
& *land_groundW(i,j,k,bi,bj) |
| 354 |
|
|
grd_HeatCp = land_heatCs + land_CpWater*mWater |
| 355 |
|
|
C temperature below freezing: |
| 356 |
|
|
temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
| 357 |
|
|
& / grd_HeatCp |
| 358 |
|
|
C temperature above freezing: |
| 359 |
|
|
temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
| 360 |
|
|
#ifdef LAND_OLD_VERSION |
| 361 |
|
|
land_enthalp(i,j,k,bi,bj) = |
| 362 |
|
|
& grd_HeatCp*land_groundT(i,j,k,bi,bj) |
| 363 |
|
|
#else |
| 364 |
|
|
land_groundT(i,j,k,bi,bj) = |
| 365 |
|
|
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
| 366 |
|
|
#endif |
| 367 |
|
|
ENDDO |
| 368 |
|
|
ENDDO |
| 369 |
|
|
ENDDO |
| 370 |
|
|
|
| 371 |
|
|
IF ( land_impl_grT ) THEN |
| 372 |
|
|
DO j=1,sNy |
| 373 |
|
|
DO i=1,sNx |
| 374 |
|
|
IF ( land_hSnow(i,j,bi,bj).GT.0. _d 0 ) THEN |
| 375 |
|
|
land_skinT(i,j,bi,bj) = MIN(land_skinT(i,j,bi,bj), 0. _d 0) |
| 376 |
|
|
ELSE |
| 377 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
| 378 |
|
|
ENDIF |
| 379 |
|
|
ENDDO |
| 380 |
|
|
ENDDO |
| 381 |
|
|
ELSE |
| 382 |
|
|
DO j=1,sNy |
| 383 |
|
|
DO i=1,sNx |
| 384 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
| 385 |
|
|
ENDDO |
| 386 |
|
|
ENDDO |
| 387 |
|
|
ENDIF |
| 388 |
|
|
|
| 389 |
|
|
C-- Compute ground temperature: end |
| 390 |
jmc |
1.1 |
ENDIF |
| 391 |
|
|
|
| 392 |
|
|
#endif /* ALLOW_LAND */ |
| 393 |
|
|
|
| 394 |
|
|
RETURN |
| 395 |
|
|
END |
Parent Directory
| 
Revision Log
| 
Revision Graph