1 |
jmc |
1.6 |
C $Header: /u/gcmpack/MITgcm/pkg/land/land_stepfwd.F,v 1.5 2004/05/21 13:41:02 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 |
1.6 |
#ifdef LAND_DEBUG |
84 |
|
|
LOGICAL dBug |
85 |
|
|
INTEGER iprt,jprt,lprt |
86 |
|
|
DATA iprt, jprt , lprt / 19 , 20 , 6 / |
87 |
|
|
1010 FORMAT(A,I3,1P4E11.3) |
88 |
|
|
#endif |
89 |
|
|
|
90 |
jmc |
1.2 |
IF (land_calc_grT .AND. .NOT.land_impl_grT ) THEN |
91 |
jmc |
1.1 |
C-- Step forward ground temperature: |
92 |
|
|
|
93 |
|
|
DO k=1,land_nLev |
94 |
|
|
kp1 = MIN(k+1,land_nLev) |
95 |
|
|
|
96 |
|
|
IF (k.EQ.1) THEN |
97 |
|
|
DO j=1,sNy |
98 |
|
|
DO i=1,sNx |
99 |
|
|
flxkup(i,j) = land_HeatFlx(i,j,bi,bj) |
100 |
|
|
ENDDO |
101 |
|
|
ENDDO |
102 |
|
|
ELSE |
103 |
|
|
DO j=1,sNy |
104 |
|
|
DO i=1,sNx |
105 |
|
|
flxkup(i,j) = flxkdw(i,j) |
106 |
|
|
ENDDO |
107 |
|
|
ENDDO |
108 |
|
|
ENDIF |
109 |
|
|
|
110 |
|
|
DO j=1,sNy |
111 |
|
|
DO i=1,sNx |
112 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
113 |
|
|
C- Thermal conductivity flux, lower interface (k,k+1): |
114 |
|
|
flxkdw(i,j) = land_grdLambda* |
115 |
|
|
& ( land_groundT(i,j,k,bi,bj) |
116 |
|
|
& -land_groundT(i,j,kp1,bi,bj) ) |
117 |
|
|
& *land_rec_dzC(kp1) |
118 |
|
|
|
119 |
jmc |
1.2 |
C- Step forward ground enthalpy, level k : |
120 |
|
|
land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
121 |
|
|
& + land_deltaT * (flxkup(i,j)-flxkdw(i,j))/land_dzF(k) |
122 |
jmc |
1.1 |
|
123 |
|
|
ENDIF |
124 |
|
|
ENDDO |
125 |
|
|
ENDDO |
126 |
|
|
|
127 |
|
|
ENDDO |
128 |
|
|
C-- step forward ground temperature: end |
129 |
|
|
ENDIF |
130 |
|
|
|
131 |
jmc |
1.2 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
132 |
|
|
|
133 |
jmc |
1.4 |
IF ( land_calc_grW .OR. land_calc_snow ) THEN |
134 |
jmc |
1.3 |
C-- Initialize run-off arrays. |
135 |
|
|
DO j=1,sNy |
136 |
|
|
DO i=1,sNx |
137 |
|
|
land_runOff(i,j,bi,bj) = 0. _d 0 |
138 |
|
|
land_enRnOf(i,j,bi,bj) = 0. _d 0 |
139 |
|
|
ENDDO |
140 |
|
|
ENDDO |
141 |
jmc |
1.4 |
ENDIF |
142 |
|
|
|
143 |
|
|
#ifdef LAND_OLD_VERSION |
144 |
|
|
IF ( .TRUE. ) THEN |
145 |
|
|
#else |
146 |
|
|
IF ( land_calc_grW ) THEN |
147 |
|
|
#endif |
148 |
jmc |
1.2 |
C-- need (later on) ground temp. to be consistent with updated enthalpy: |
149 |
|
|
DO k=1,land_nLev |
150 |
|
|
DO j=1,sNy |
151 |
|
|
DO i=1,sNx |
152 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
153 |
|
|
mWater = land_rhoLiqW*land_waterCap |
154 |
|
|
& *land_groundW(i,j,k,bi,bj) |
155 |
jmc |
1.6 |
mWater = MAX( mWater, 0. _d 0 ) |
156 |
jmc |
1.2 |
grd_HeatCp = land_heatCs + land_CpWater*mWater |
157 |
|
|
temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
158 |
|
|
& / grd_HeatCp |
159 |
|
|
temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
160 |
|
|
land_groundT(i,j,k,bi,bj) = |
161 |
|
|
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
162 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
163 |
|
|
dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
164 |
|
|
IF (dBug) write(6,1010) |
165 |
|
|
& 'LAND_STEPFWD: k,temp,af,bf=', |
166 |
|
|
& k,land_groundT(i,j,k,bi,bj),temp_af,temp_bf |
167 |
|
|
#endif |
168 |
jmc |
1.2 |
ENDIF |
169 |
|
|
ENDDO |
170 |
|
|
ENDDO |
171 |
|
|
ENDDO |
172 |
|
|
ENDIF |
173 |
|
|
|
174 |
|
|
IF ( land_calc_snow ) THEN |
175 |
|
|
C-- Step forward Snow thickness (also account for rain temperature) |
176 |
|
|
ageFac = 1. _d 0 - land_deltaT/timeSnowAge |
177 |
|
|
DO j=1,sNy |
178 |
|
|
DO i=1,sNx |
179 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
180 |
|
|
mPmE = land_Pr_m_Ev(i,j,bi,bj) |
181 |
|
|
enWfx = land_EnWFlux(i,j,bi,bj) |
182 |
|
|
enGr1 = land_enthalp(i,j,1,bi,bj)*land_dzF(1) |
183 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
184 |
|
|
dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
185 |
|
|
IF (dBug) write(6,1010) |
186 |
|
|
& 'LAND_STEPFWD:mPmE,enWfx,enGr1/dt,hSnow=',0, |
187 |
|
|
& mPmE,enWfx,enGr1/land_deltaT,land_hSnow(i,j,bi,bj) |
188 |
|
|
#endif |
189 |
jmc |
1.2 |
C- snow aging: |
190 |
|
|
land_snowAge(i,j,bi,bj) = |
191 |
|
|
& ( land_deltaT + land_snowAge(i,j,bi,bj)*ageFac ) |
192 |
|
|
IF ( enWfx.LT.0. ) THEN |
193 |
jmc |
1.5 |
C- snow precip in excess ( > Evap of snow) or snow prec & Evap of Liq.Water: |
194 |
jmc |
1.2 |
C => start to melt (until ground at freezing point) and then accumulate |
195 |
|
|
snowPrec = -enWfx -MAX( enGr1/land_deltaT, 0. _d 0 ) |
196 |
jmc |
1.5 |
C- snow accumulation cannot be larger that net precip |
197 |
|
|
snowPrec = MAX( 0. _d 0 , |
198 |
|
|
& MIN( snowPrec*recip_Lfreez, mPmE ) ) |
199 |
jmc |
1.2 |
mPmE = mPmE - snowPrec |
200 |
jmc |
1.3 |
flxEngU(i,j) = enWfx + land_Lfreez*snowPrec |
201 |
jmc |
1.2 |
hNewSnow = land_deltaT * snowPrec / land_rhoSnow |
202 |
|
|
C- refresh snow age: |
203 |
|
|
land_snowAge(i,j,bi,bj) = land_snowAge(i,j,bi,bj) |
204 |
|
|
& *EXP( -hNewSnow/hNewSnowAge ) |
205 |
jmc |
1.3 |
C- update snow thickness: |
206 |
|
|
c land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + hNewSnow |
207 |
|
|
C glacier & ice-sheet missing: excess of snow put directly into run-off |
208 |
|
|
dhSnowMx = MAX( 0. _d 0, |
209 |
|
|
& land_hMaxSnow - land_hSnow(i,j,bi,bj) ) |
210 |
|
|
dhSnow = MIN( hNewSnow, dhSnowMx ) |
211 |
|
|
land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) + dhSnow |
212 |
|
|
mIceDt = land_rhoSnow * (hNewSnow-dhSnow) / land_deltaT |
213 |
|
|
land_runOff(i,j,bi,bj) = mIceDt/land_rhoLiqW |
214 |
|
|
land_enRnOf(i,j,bi,bj) = -mIceDt*land_Lfreez |
215 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
216 |
|
|
IF (dBug) write(6,1010) |
217 |
|
|
& 'LAND_STEPFWD: 3,snP,mPmE,hNsnw,hSnw=', |
218 |
|
|
& 3,snowPrec,mPmE,hNewSnow,land_hSnow(i,j,bi,bj) |
219 |
|
|
#endif |
220 |
jmc |
1.2 |
ELSE |
221 |
jmc |
1.5 |
C- rain precip (whatever Evap is) or Evap of snow exceeds snow precip: |
222 |
jmc |
1.2 |
C => snow melts or sublimates |
223 |
|
|
c snowMelt = MIN( enWfx*recip_Lfreez , |
224 |
|
|
c & land_hSnow(i,j,bi,bj)*land_rhoSnow/land_deltaT ) |
225 |
|
|
mSnow = land_hSnow(i,j,bi,bj)*land_rhoSnow |
226 |
|
|
dMsn = enWfx*recip_Lfreez*land_deltaT |
227 |
|
|
IF ( dMsn .GE. mSnow ) THEN |
228 |
|
|
dMsn = mSnow |
229 |
|
|
land_hSnow(i,j,bi,bj) = 0. _d 0 |
230 |
jmc |
1.3 |
flxEngU(i,j) = enWfx - land_Lfreez*mSnow/land_deltaT |
231 |
jmc |
1.2 |
ELSE |
232 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
233 |
jmc |
1.2 |
land_hSnow(i,j,bi,bj) = land_hSnow(i,j,bi,bj) |
234 |
|
|
& - dMsn / land_rhoSnow |
235 |
|
|
ENDIF |
236 |
|
|
c IF (mPmE.GT.0.) land_snowAge(i,j,bi,bj) = timeSnowAge |
237 |
|
|
mPmE = mPmE + dMsn/land_deltaT |
238 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
239 |
|
|
IF (dBug) write(6,1010) |
240 |
|
|
& 'LAND_STEPFWD: 4,dMsn,mPmE,hSnw,enWfx=', |
241 |
|
|
& 4,dMsn,mPmE,land_hSnow(i,j,bi,bj),flxEngU(i,j) |
242 |
|
|
#endif |
243 |
jmc |
1.2 |
ENDIF |
244 |
|
|
flxkup(i,j) = mPmE/land_rhoLiqW |
245 |
|
|
c land_Pr_m_Ev(i,j,bi,bj) = mPmE |
246 |
|
|
IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) |
247 |
|
|
& land_snowAge(i,j,bi,bj) = 0. _d 0 |
248 |
|
|
C- avoid negative (but very small, < 1.e-34) hSnow that occurs because |
249 |
|
|
C of truncation error. Might need to rewrite this part. |
250 |
|
|
c IF ( land_hSnow(i,j,bi,bj).LE. 0. _d 0 ) THEN |
251 |
|
|
c land_hSnow(i,j,bi,bj) = 0. _d 0 |
252 |
|
|
c land_snowAge(i,j,bi,bj) = 0. _d 0 |
253 |
|
|
c ENDIF |
254 |
|
|
ENDIF |
255 |
|
|
ENDDO |
256 |
|
|
ENDDO |
257 |
|
|
ELSE |
258 |
|
|
DO j=1,sNy |
259 |
|
|
DO i=1,sNx |
260 |
|
|
flxkup(i,j) = land_Pr_m_Ev(i,j,bi,bj)/land_rhoLiqW |
261 |
jmc |
1.3 |
flxEngU(i,j) = 0. _d 0 |
262 |
jmc |
1.2 |
ENDDO |
263 |
|
|
ENDDO |
264 |
|
|
ENDIF |
265 |
|
|
|
266 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
267 |
|
|
|
268 |
jmc |
1.1 |
IF (land_calc_grW) THEN |
269 |
|
|
C-- Step forward ground Water: |
270 |
|
|
|
271 |
|
|
DO k=1,land_nLev |
272 |
|
|
IF (k.EQ.land_nLev) THEN |
273 |
|
|
kp1 = k |
274 |
|
|
fractRunOff = 1. _d 0 |
275 |
|
|
ELSE |
276 |
|
|
kp1 = k+1 |
277 |
|
|
fractRunOff = land_fractRunOff |
278 |
|
|
ENDIF |
279 |
|
|
fieldCapac = land_waterCap*land_dzF(k) |
280 |
|
|
|
281 |
|
|
DO j=1,sNy |
282 |
|
|
DO i=1,sNx |
283 |
|
|
IF ( land_frc(i,j,bi,bj).GT.0. ) THEN |
284 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
285 |
|
|
dBug = bi.eq.lprt .AND. i.EQ.iprt .AND. j.EQ.jprt |
286 |
|
|
#endif |
287 |
jmc |
1.3 |
|
288 |
|
|
#ifdef LAND_OLD_VERSION |
289 |
|
|
IF ( .TRUE. ) THEN |
290 |
|
|
IF ( k.EQ.land_nLev ) THEN |
291 |
|
|
#else |
292 |
|
|
IF ( land_groundT(i,j,k,bi,bj).LT.0. _d 0 ) THEN |
293 |
|
|
C- Frozen level: only account for upper level fluxes |
294 |
|
|
IF ( flxkup(i,j) .LT. 0. _d 0 ) THEN |
295 |
|
|
C- Step forward soil moisture (& enthapy), level k : |
296 |
|
|
land_groundW(i,j,k,bi,bj) = land_groundW(i,j,k,bi,bj) |
297 |
|
|
& + land_deltaT * flxkup(i,j) / fieldCapac |
298 |
|
|
IF ( land_calc_snow ) |
299 |
|
|
& land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
300 |
|
|
& + land_deltaT * flxEngU(i,j) / land_dzF(k) |
301 |
|
|
ELSE |
302 |
|
|
C- Frozen level: incoming water flux goes directly into run-off |
303 |
|
|
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
304 |
|
|
& + flxkup(i,j) |
305 |
|
|
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
306 |
|
|
& + flxEngU(i,j) |
307 |
|
|
ENDIF |
308 |
|
|
C- prepare fluxes for next level: |
309 |
|
|
flxkup(i,j) = 0. _d 0 |
310 |
|
|
flxEngU(i,j) = 0. _d 0 |
311 |
|
|
|
312 |
|
|
ELSE |
313 |
|
|
|
314 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
315 |
jmc |
1.2 |
C- Diffusion flux of water, lower interface (k,k+1): |
316 |
jmc |
1.3 |
IF ( k.EQ.land_nLev .OR. |
317 |
|
|
& land_groundT(i,j,kp1,bi,bj).LT.0. _d 0 ) THEN |
318 |
|
|
#endif /* LAND_OLD_VERSION */ |
319 |
|
|
C- no Diffusion of water if one level is frozen : |
320 |
|
|
flxkdw(i,j) = 0. _d 0 |
321 |
|
|
flxEngL = 0. _d 0 |
322 |
|
|
ELSE |
323 |
|
|
flxkdw(i,j) = fieldCapac* |
324 |
|
|
& ( land_groundW(i,j,k,bi,bj) |
325 |
|
|
& -land_groundW(i,j,kp1,bi,bj) ) |
326 |
|
|
& / land_wTauDiff |
327 |
|
|
C- energy flux associated with water flux: take upwind Temp |
328 |
|
|
IF ( flxkdw(i,j).GE.0. ) THEN |
329 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
330 |
|
|
& *land_groundT(i,j,k,bi,bj) |
331 |
|
|
ELSE |
332 |
|
|
flxEngL = flxkdw(i,j)*land_rhoLiqW*land_CpWater |
333 |
|
|
& *land_groundT(i,j,kp1,bi,bj) |
334 |
|
|
ENDIF |
335 |
|
|
ENDIF |
336 |
jmc |
1.1 |
|
337 |
|
|
C- Step forward soil moisture, level k : |
338 |
jmc |
1.3 |
groundWnp1 = land_groundW(i,j,k,bi,bj) |
339 |
jmc |
1.2 |
& + land_deltaT * (flxkup(i,j)-flxkdw(i,j)) / fieldCapac |
340 |
jmc |
1.3 |
|
341 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
342 |
|
|
IF(dBug)write(6,1010)'LAND_STEPFWD: grdW-1,fx_ku,kd,grdW-1=' |
343 |
|
|
& ,5,land_groundW(i,j,k,bi,bj)-1., |
344 |
|
|
& flxkup(i,j),flxkdw(i,j),groundWnp1-1. |
345 |
|
|
#endif |
346 |
|
|
|
347 |
jmc |
1.3 |
C- Water in excess will leave as run-off or go to level below |
348 |
|
|
land_groundW(i,j,k,bi,bj) = MIN(1. _d 0, groundWnp1) |
349 |
|
|
grdWexcess = ( groundWnp1 - MIN(1. _d 0, groundWnp1) ) |
350 |
|
|
& *fieldCapac/land_deltaT |
351 |
jmc |
1.1 |
|
352 |
|
|
C- Run off: fraction 1-fractRunOff enters level below |
353 |
jmc |
1.3 |
land_runOff(i,j,bi,bj) = land_runOff(i,j,bi,bj) |
354 |
|
|
& + fractRunOff*grdWexcess |
355 |
|
|
C- prepare fluxes for next level: |
356 |
|
|
flxkup(i,j) = flxkdw(i,j) |
357 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess |
358 |
|
|
|
359 |
|
|
IF ( land_calc_snow ) THEN |
360 |
|
|
enthalpGrdW = land_rhoLiqW*land_CpWater |
361 |
|
|
& *land_groundT(i,j,k,bi,bj) |
362 |
|
|
C-- Account for water fluxes in energy budget: update ground Enthalpy |
363 |
|
|
land_enthalp(i,j,k,bi,bj) = land_enthalp(i,j,k,bi,bj) |
364 |
|
|
& + ( flxEngU(i,j) - flxEngL - grdWexcess*enthalpGrdW |
365 |
|
|
& )*land_deltaT/land_dzF(k) |
366 |
|
|
|
367 |
|
|
land_enRnOf(i,j,bi,bj) = land_enRnOf(i,j,bi,bj) |
368 |
|
|
& + fractRunOff*grdWexcess*enthalpGrdW |
369 |
|
|
C- prepare fluxes for next level: |
370 |
|
|
flxEngU(i,j) = flxEngL |
371 |
|
|
& + (1. _d 0-fractRunOff)*grdWexcess*enthalpGrdW |
372 |
|
|
ENDIF |
373 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
374 |
|
|
IF (dBug) write(6,1010) 'LAND_STEPFWD: Temp,FlxE,FlxW=', |
375 |
|
|
& 7, land_groundT(i,j,k,bi,bj), flxEngU(i,j), flxkup(i,j) |
376 |
|
|
#endif |
377 |
jmc |
1.2 |
ENDIF |
378 |
jmc |
1.3 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
379 |
jmc |
1.6 |
#ifdef LAND_DEBUG |
380 |
|
|
IF (dBug) write(6,1010) 'LAND_STEPFWD: RO,enRO=', |
381 |
|
|
& 8, land_runOff(i,j,bi,bj),land_enRnOf(i,j,bi,bj) |
382 |
|
|
#endif |
383 |
jmc |
1.2 |
|
384 |
jmc |
1.1 |
ENDIF |
385 |
|
|
ENDDO |
386 |
|
|
ENDDO |
387 |
|
|
|
388 |
|
|
ENDDO |
389 |
|
|
C-- step forward ground Water: end |
390 |
jmc |
1.2 |
ENDIF |
391 |
|
|
|
392 |
|
|
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
393 |
|
|
|
394 |
jmc |
1.3 |
IF ( land_calc_grT ) THEN |
395 |
|
|
C-- Compute ground temperature from enthalpy (if not already done): |
396 |
jmc |
1.2 |
|
397 |
|
|
DO k=1,land_nLev |
398 |
|
|
DO j=1,sNy |
399 |
|
|
DO i=1,sNx |
400 |
|
|
C- Ground Heat capacity, layer k: |
401 |
|
|
mWater = land_rhoLiqW*land_waterCap |
402 |
|
|
& *land_groundW(i,j,k,bi,bj) |
403 |
jmc |
1.6 |
mWater = MAX( mWater, 0. _d 0 ) |
404 |
jmc |
1.2 |
grd_HeatCp = land_heatCs + land_CpWater*mWater |
405 |
|
|
C temperature below freezing: |
406 |
|
|
temp_bf = (land_enthalp(i,j,k,bi,bj)+land_Lfreez*mWater) |
407 |
|
|
& / grd_HeatCp |
408 |
|
|
C temperature above freezing: |
409 |
|
|
temp_af = land_enthalp(i,j,k,bi,bj) / grd_HeatCp |
410 |
|
|
#ifdef LAND_OLD_VERSION |
411 |
|
|
land_enthalp(i,j,k,bi,bj) = |
412 |
|
|
& grd_HeatCp*land_groundT(i,j,k,bi,bj) |
413 |
|
|
#else |
414 |
|
|
land_groundT(i,j,k,bi,bj) = |
415 |
|
|
& MIN( temp_bf, MAX(temp_af, 0. _d 0) ) |
416 |
|
|
#endif |
417 |
|
|
ENDDO |
418 |
|
|
ENDDO |
419 |
|
|
ENDDO |
420 |
|
|
|
421 |
|
|
IF ( land_impl_grT ) THEN |
422 |
|
|
DO j=1,sNy |
423 |
|
|
DO i=1,sNx |
424 |
|
|
IF ( land_hSnow(i,j,bi,bj).GT.0. _d 0 ) THEN |
425 |
|
|
land_skinT(i,j,bi,bj) = MIN(land_skinT(i,j,bi,bj), 0. _d 0) |
426 |
|
|
ELSE |
427 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
428 |
|
|
ENDIF |
429 |
|
|
ENDDO |
430 |
|
|
ENDDO |
431 |
|
|
ELSE |
432 |
|
|
DO j=1,sNy |
433 |
|
|
DO i=1,sNx |
434 |
|
|
land_skinT(i,j,bi,bj) = land_groundT(i,j,1,bi,bj) |
435 |
|
|
ENDDO |
436 |
|
|
ENDDO |
437 |
|
|
ENDIF |
438 |
|
|
|
439 |
|
|
C-- Compute ground temperature: end |
440 |
jmc |
1.1 |
ENDIF |
441 |
|
|
|
442 |
|
|
#endif /* ALLOW_LAND */ |
443 |
|
|
|
444 |
|
|
RETURN |
445 |
|
|
END |