1 |
C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/aim_surf_bc.F,v 1.9 2004/11/14 19:54:01 jmc Exp $ |
2 |
C $Name: $ |
3 |
|
4 |
#include "AIM_OPTIONS.h" |
5 |
|
6 |
SUBROUTINE AIM_SURF_BC( tYear, myTime, myIter, bi, bj, myThid ) |
7 |
C *================================================================* |
8 |
C | S/R AIM_SURF_BC |
9 |
C | Set surface Boundary Conditions |
10 |
C | for the atmospheric physics package |
11 |
C *================================================================* |
12 |
c | was part of S/R FORDATE in Franco Molteni SPEEDY code (ver23). |
13 |
C | For now, surface BC are loaded from files (S/R AIM_FIELDS_LOAD) |
14 |
C | and imposed (= surf. forcing). |
15 |
C | In the future, will add |
16 |
C | a land model and a coupling interface with an ocean GCM |
17 |
C *================================================================* |
18 |
IMPLICIT NONE |
19 |
|
20 |
C -------------- Global variables -------------- |
21 |
C-- size for MITgcm & Physics package : |
22 |
#include "AIM_SIZE.h" |
23 |
|
24 |
C-- MITgcm |
25 |
#include "EEPARAMS.h" |
26 |
#include "PARAMS.h" |
27 |
c #include "DYNVARS.h" |
28 |
#include "GRID.h" |
29 |
c #include "SURFACE.h" |
30 |
|
31 |
C-- Physics package |
32 |
#include "AIM_PARAMS.h" |
33 |
#include "AIM_FFIELDS.h" |
34 |
c #include "AIM_GRID.h" |
35 |
#include "com_forcon.h" |
36 |
#include "com_forcing.h" |
37 |
c #include "com_physvar.h" |
38 |
|
39 |
C-- Coupled to the Ocean : |
40 |
#ifdef COMPONENT_MODULE |
41 |
#include "CPL_PARAMS.h" |
42 |
#include "ATMCPL.h" |
43 |
#endif |
44 |
|
45 |
C == Routine arguments == |
46 |
C tYear - Fraction into year |
47 |
C myTime - Current time of simulation ( s ) |
48 |
C myIter - Current iteration number in simulation |
49 |
C bi,bj - Tile index |
50 |
C myThid - Number of this instance of the routine |
51 |
INTEGER myIter, bi, bj, myThid |
52 |
_RL tYear, myTime |
53 |
|
54 |
#ifdef ALLOW_AIM |
55 |
C == Local variables == |
56 |
C i,j,k,I2,k - Loop counters |
57 |
INTEGER i,j,I2,k |
58 |
_RL SDEP1, IDEP2, SDEP2, SWWIL2, RSW, soilw_0, soilw_1 |
59 |
_RL RSD, alb_land, oceTfreez |
60 |
c _RL DALB, alb_sea |
61 |
|
62 |
C_EqCh: start |
63 |
CHARACTER*(MAX_LEN_MBUF) suff |
64 |
_RL xBump, yBump, dxBump, dyBump |
65 |
xBump = thetaMin + delX(1)*64. |
66 |
yBump = phiMin + delY(1)*11.5 |
67 |
dxBump= delX(1)*12. |
68 |
dyBump= delY(1)*6. |
69 |
C_EqCh: Fix solar insolation with Sun directly overhead on Equator |
70 |
tYear = 0.25 _d 0 - 10. _d 0/365. _d 0 |
71 |
C_EqCh: end |
72 |
|
73 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
74 |
C- Set Land-sea mask (in [0,1]) from aim_landFr to fMask1: |
75 |
DO j=1,sNy |
76 |
DO i=1,sNx |
77 |
I2 = i+(j-1)*sNx |
78 |
fMask1(I2,1,myThid) = aim_landFr(i,j,bi,bj) |
79 |
ENDDO |
80 |
ENDDO |
81 |
|
82 |
IF (aim_useFMsurfBC) THEN |
83 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
84 |
|
85 |
C-- Compute surface forcing at present time (linear Interp in time) |
86 |
C using F.Molteni surface BC form ; fields needed are: |
87 |
C 1. Sea Surface temperatures (in situ Temp. [K]) |
88 |
C 2. Land Surface temperatures (in situ Temp. [K]) |
89 |
C 3. Soil moisture (between 0-1) |
90 |
C 4. Snow depth, Sea Ice : used to compute albedo (=> local arrays) |
91 |
C 5. Albedo (between 0-1) |
92 |
|
93 |
C- Surface Temperature: |
94 |
DO j=1,sNy |
95 |
DO i=1,sNx |
96 |
I2 = i+(j-1)*sNx |
97 |
sst1(I2,myThid) = aim_sWght0*aim_sst0(i,j,bi,bj) |
98 |
& + aim_sWght1*aim_sst1(i,j,bi,bj) |
99 |
stl1(I2,myThid) = aim_sWght0*aim_lst0(i,j,bi,bj) |
100 |
& + aim_sWght1*aim_lst1(i,j,bi,bj) |
101 |
ENDDO |
102 |
ENDDO |
103 |
|
104 |
C- Soil Water availability : (from F.M. INFORC S/R) |
105 |
SDEP1 = 70. _d 0 |
106 |
IDEP2 = 3. _d 0 |
107 |
SDEP2 = IDEP2*SDEP1 |
108 |
|
109 |
SWWIL2= SDEP2*SWWIL |
110 |
RSW = 1. _d 0/(SDEP1*SWCAP+SDEP2*(SWCAP-SWWIL)) |
111 |
|
112 |
DO j=1,sNy |
113 |
DO i=1,sNx |
114 |
I2 = i+(j-1)*sNx |
115 |
soilw_0 = ( aim_sw10(i,j,bi,bj) |
116 |
& +aim_veget(i,j,bi,bj)* |
117 |
& MAX(IDEP2*aim_sw20(i,j,bi,bj)-SWWIL2, 0. _d 0) |
118 |
& )*RSW |
119 |
soilw_1 = ( aim_sw11(i,j,bi,bj) |
120 |
& +aim_veget(i,j,bi,bj)* |
121 |
& MAX(IDEP2*aim_sw21(i,j,bi,bj)-SWWIL2, 0. _d 0) |
122 |
& )*RSW |
123 |
soilw1(I2,myThid) = aim_sWght0*soilw_0 |
124 |
& + aim_sWght1*soilw_1 |
125 |
soilw1(I2,myThid) = MIN(1. _d 0, soilw1(I2,myThid) ) |
126 |
ENDDO |
127 |
ENDDO |
128 |
|
129 |
C- Set snow depth & sea-ice fraction : |
130 |
DO j=1,sNy |
131 |
DO i=1,sNx |
132 |
I2 = i+(j-1)*sNx |
133 |
snow1(I2) = aim_sWght0*aim_snw0(i,j,bi,bj) |
134 |
& + aim_sWght1*aim_snw1(i,j,bi,bj) |
135 |
oice1(I2) = aim_sWght0*aim_oic0(i,j,bi,bj) |
136 |
& + aim_sWght1*aim_oic1(i,j,bi,bj) |
137 |
ENDDO |
138 |
ENDDO |
139 |
|
140 |
IF (aim_splitSIOsFx) THEN |
141 |
C- Split Ocean and Sea-Ice surf. temp. ; remove ice-fraction < 1 % |
142 |
c oceTfreez = tFreeze - 1.9 _d 0 |
143 |
oceTfreez = celsius2K - 1.9 _d 0 |
144 |
DO J=1,NGP |
145 |
sti1(J,myThid) = sst1(J,myThid) |
146 |
IF ( oice1(J) .GT. 1. _d -2 ) THEN |
147 |
sst1(J,myThid) = MAX(sst1(J,myThid),oceTfreez) |
148 |
sti1(J,myThid) = sst1(J,myThid) |
149 |
& +(sti1(J,myThid)-sst1(J,myThid))/oice1(J) |
150 |
ELSE |
151 |
oice1(J) = 0. _d 0 |
152 |
ENDIF |
153 |
ENDDO |
154 |
ELSE |
155 |
DO J=1,NGP |
156 |
sti1(J,myThid) = sst1(J,myThid) |
157 |
ENDDO |
158 |
ENDIF |
159 |
|
160 |
C- Surface Albedo : (from F.M. FORDATE S/R) |
161 |
c_FM DALB=ALBICE-ALBSEA |
162 |
RSD=1. _d 0/SDALB |
163 |
DO j=1,sNy |
164 |
DO i=1,sNx |
165 |
c_FM SNOWC=MIN(1.,RSD*SNOW1(I,J)) |
166 |
c_FM ALBL=ALB0(I,J)+MAX(ALBSN-ALB0(I,J),0.0)*SNOWC |
167 |
c_FM ALBS=ALBSEA+DALB*OICE1(I,J) |
168 |
c_FM ALB1(I,J)=FMASK1(I,J)*ALBL+FMASK0(I,J)*ALBS |
169 |
I2 = i+(j-1)*sNx |
170 |
alb_land = aim_albedo(i,j,bi,bj) |
171 |
& + MAX( 0. _d 0, ALBSN-aim_albedo(i,j,bi,bj) ) |
172 |
& *MIN( 1. _d 0, RSD*snow1(I2)) |
173 |
c alb_sea = ALBSEA + DALB*oice1(I2) |
174 |
c alb1(I2,0,myThid) = alb_sea |
175 |
c & + (alb_land - alb_sea)*fMask1(I2,1,myThid) |
176 |
alb1(I2,1,myThid) = alb_land |
177 |
alb1(I2,2,myThid) = ALBSEA |
178 |
alb1(I2,3,myThid) = ALBICE |
179 |
ENDDO |
180 |
ENDDO |
181 |
|
182 |
C-- else aim_useFMsurfBC |
183 |
ELSE |
184 |
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
185 |
|
186 |
C- Set surface forcing fields needed by atmos. physics package |
187 |
C 1. Albedo (between 0-1) |
188 |
C 2. Sea Surface temperatures (in situ Temp. [K]) |
189 |
C 3. Land Surface temperatures (in situ Temp. [K]) |
190 |
C 4. Soil moisture (between 0-1) |
191 |
C Snow depth, Sea Ice (<- no need for now) |
192 |
|
193 |
C Set surface albedo data (in [0,1]) from aim_albedo to alb1 : |
194 |
IF (aim_useMMsurfFc) THEN |
195 |
DO j=1,sNy |
196 |
DO i=1,sNx |
197 |
I2 = i+(j-1)*sNx |
198 |
alb1(I2,1,myThid) = aim_albedo(i,j,bi,bj) |
199 |
alb1(I2,2,myThid) = aim_albedo(i,j,bi,bj) |
200 |
alb1(I2,3,myThid) = aim_albedo(i,j,bi,bj) |
201 |
ENDDO |
202 |
ENDDO |
203 |
ELSE |
204 |
DO j=1,sNy |
205 |
DO i=1,sNx |
206 |
I2 = i+(j-1)*sNx |
207 |
alb1(I2,1,myThid) = 0. |
208 |
alb1(I2,2,myThid) = 0. |
209 |
alb1(I2,3,myThid) = 0. |
210 |
ENDDO |
211 |
ENDDO |
212 |
ENDIF |
213 |
C Set surface temperature data from aim_S/LSurfTemp to sst1 & stl1 : |
214 |
IF (aim_useMMsurfFc) THEN |
215 |
DO j=1,sNy |
216 |
DO i=1,sNx |
217 |
I2 = i+(j-1)*sNx |
218 |
sst1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
219 |
stl1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
220 |
sti1(I2,myThid) = aim_surfTemp(i,j,bi,bj) |
221 |
ENDDO |
222 |
ENDDO |
223 |
ELSE |
224 |
DO j=1,sNy |
225 |
DO i=1,sNx |
226 |
I2 = i+(j-1)*sNx |
227 |
sst1(I2,myThid) = 300. |
228 |
stl1(I2,myThid) = 300. |
229 |
sti1(I2,myThid) = 300. |
230 |
C_EqCh: start |
231 |
sst1(I2,myThid) = 280. |
232 |
& +20. _d 0 *exp( -((xC(i,j,bi,bj)-xBump)/dxBump)**2 |
233 |
& -((yC(i,j,bi,bj)-yBump)/dyBump)**2 ) |
234 |
stl1(I2,myThid) = sst1(I2,myThid) |
235 |
sti1(I2,myThid) = sst1(I2,myThid) |
236 |
C_EqCh: end |
237 |
ENDDO |
238 |
ENDDO |
239 |
C_EqCh: start |
240 |
IF (myIter.EQ.nIter0) THEN |
241 |
WRITE(suff,'(I10.10)') myIter |
242 |
CALL AIM_WRITE_LOCAL('aim_SST.',suff,1,sst1(1,myThid), |
243 |
& bi,bj,1,myIter,myThid) |
244 |
ENDIF |
245 |
C_EqCh: end |
246 |
ENDIF |
247 |
|
248 |
C- Set soil water availability (in [0,1]) from aim_soilWater to soilw1 : |
249 |
IF (aim_useMMsurfFc) THEN |
250 |
DO j=1,sNy |
251 |
DO i=1,sNx |
252 |
I2 = i+(j-1)*sNx |
253 |
soilw1(I2,myThid) = aim_soilWater(i,j,bi,bj) |
254 |
ENDDO |
255 |
ENDDO |
256 |
ELSE |
257 |
DO j=1,sNy |
258 |
DO i=1,sNx |
259 |
I2 = i+(j-1)*sNx |
260 |
soilw1(I2,myThid) = 0. |
261 |
ENDDO |
262 |
ENDDO |
263 |
ENDIF |
264 |
|
265 |
C- Set Snow depth and Sea Ice |
266 |
C (not needed here since albedo is loaded from file) |
267 |
DO j=1,sNy |
268 |
DO i=1,sNx |
269 |
I2 = i+(j-1)*sNx |
270 |
oice1(I2) = 0. |
271 |
snow1(I2) = 0. |
272 |
ENDDO |
273 |
ENDDO |
274 |
|
275 |
C-- endif/else aim_useFMsurfBC |
276 |
ENDIF |
277 |
|
278 |
#ifdef COMPONENT_MODULE |
279 |
IF ( useCoupler ) THEN |
280 |
C-- take surface data from the ocean component |
281 |
C to replace MxL fields (if use sea-ice) or directly AIM SST |
282 |
CALL ATM_APPLY_IMPORT( |
283 |
I aim_landFr, |
284 |
U sst1(1,mythid), oice1, |
285 |
I myTime, myIter, bi, bj, myThid ) |
286 |
ENDIF |
287 |
#endif /* COMPONENT_MODULE */ |
288 |
|
289 |
#ifdef ALLOW_LAND |
290 |
IF (useLand) THEN |
291 |
C- Use land model output instead of prescribed Temp & moisture |
292 |
CALL AIM_LAND2AIM( |
293 |
I aim_landFr, aim_veget, aim_albedo, snow1, |
294 |
U stl1(1,mythid), soilw1(1,mythid), alb1(1,1,myThid), |
295 |
I myTime, myIter, bi, bj, myThid ) |
296 |
ENDIF |
297 |
#endif /* ALLOW_LAND */ |
298 |
|
299 |
#ifdef ALLOW_THSICE |
300 |
IF (useThSIce) THEN |
301 |
C- Use thermo. sea-ice model output instead of prescribed Temp & albedo |
302 |
CALL AIM_SICE2AIM( |
303 |
I aim_landFr, |
304 |
U sst1(1,mythid), oice1, |
305 |
O sti1(1,mythid), alb1(1,3,myThid), |
306 |
I myTime, myIter, bi, bj, myThid ) |
307 |
ENDIF |
308 |
#endif /* ALLOW_THSICE */ |
309 |
|
310 |
C-- set the sea-ice & open ocean fraction : |
311 |
DO J=1,NGP |
312 |
fMask1(J,3,myThid) =(1. _d 0 - fMask1(J,1,myThid)) |
313 |
& *oice1(J) |
314 |
fMask1(J,2,myThid) = 1. _d 0 - fMask1(J,1,myThid) |
315 |
& - fMask1(J,3,myThid) |
316 |
ENDDO |
317 |
|
318 |
C-- set the mean albedo : |
319 |
DO J=1,NGP |
320 |
alb1(J,0,myThid) = fMask1(J,1,myThid)*alb1(J,1,myThid) |
321 |
& + fMask1(J,2,myThid)*alb1(J,2,myThid) |
322 |
& + fMask1(J,3,myThid)*alb1(J,3,myThid) |
323 |
ENDDO |
324 |
|
325 |
C-- initialize surf. temp. change to zero: |
326 |
DO k=1,3 |
327 |
DO J=1,NGP |
328 |
dTsurf(J,k,myThid) = 0. |
329 |
ENDDO |
330 |
ENDDO |
331 |
|
332 |
IF (.NOT.aim_splitSIOsFx) THEN |
333 |
DO J=1,NGP |
334 |
fMask1(J,3,myThid) = 0. _d 0 |
335 |
fMask1(J,2,myThid) = 1. _d 0 - fMask1(J,1,myThid) |
336 |
ENDDO |
337 |
ENDIF |
338 |
|
339 |
#endif /* ALLOW_AIM */ |
340 |
|
341 |
RETURN |
342 |
END |