1 |
jmc |
1.9 |
C $Header: /u/gcmpack/MITgcm/pkg/aim_v23/aim_aim2sioce.F,v 1.8 2007/10/01 13:34:43 jmc Exp $ |
2 |
jmc |
1.1 |
C $Name: $ |
3 |
|
|
|
4 |
|
|
#include "AIM_OPTIONS.h" |
5 |
|
|
#ifdef ALLOW_THSICE |
6 |
|
|
#include "THSICE_OPTIONS.h" |
7 |
|
|
#endif |
8 |
|
|
|
9 |
|
|
CBOP |
10 |
|
|
C !ROUTINE: AIM_AIM2SIOCE |
11 |
|
|
C !INTERFACE: |
12 |
|
|
SUBROUTINE AIM_AIM2SIOCE( |
13 |
jmc |
1.2 |
I land_frc, siceFrac, |
14 |
jmc |
1.9 |
O prcAtm, snowPrc, |
15 |
jmc |
1.1 |
I bi, bj, myTime, myIter, myThid) |
16 |
|
|
|
17 |
|
|
C !DESCRIPTION: \bv |
18 |
|
|
C *==========================================================* |
19 |
|
|
C | S/R AIM_AIM2SIOCE |
20 |
|
|
C | o Interface between AIM and thSIce pkg or (coupled) ocean |
21 |
|
|
C *==========================================================* |
22 |
|
|
C | o compute surface fluxes over ocean (ice-free + ice covered) |
23 |
|
|
C | for diagnostics, thsice package and (slab, coupled) ocean |
24 |
|
|
C *==========================================================* |
25 |
|
|
C \ev |
26 |
|
|
|
27 |
|
|
C !USES: |
28 |
|
|
IMPLICIT NONE |
29 |
|
|
|
30 |
|
|
C == Global variables === |
31 |
|
|
C-- size for MITgcm & Physics package : |
32 |
jmc |
1.3 |
#include "AIM_SIZE.h" |
33 |
jmc |
1.1 |
|
34 |
|
|
#include "EEPARAMS.h" |
35 |
|
|
#include "PARAMS.h" |
36 |
|
|
#include "FFIELDS.h" |
37 |
|
|
|
38 |
|
|
C-- Physics package |
39 |
|
|
#include "AIM_PARAMS.h" |
40 |
|
|
#include "com_physcon.h" |
41 |
|
|
#include "com_physvar.h" |
42 |
|
|
|
43 |
|
|
#ifdef ALLOW_THSICE |
44 |
jmc |
1.3 |
#include "THSICE_SIZE.h" |
45 |
jmc |
1.1 |
#include "THSICE_PARAMS.h" |
46 |
|
|
#include "THSICE_VARS.h" |
47 |
|
|
#endif |
48 |
|
|
|
49 |
jmc |
1.3 |
C updated fields (in commom blocks): |
50 |
|
|
C if using thSIce: |
51 |
|
|
C Qsw(inp) :: SW radiation through the sea-ice down to the ocean (+=up) |
52 |
|
|
C Qsw(out) :: SW radiation down to the ocean (ice-free + ice-covered)(+=up) |
53 |
|
|
C Qnet(out) :: Net heat flux out of the ocean (ice-free ocean only)(+=up) |
54 |
|
|
C and the Ice-Covered contribution will be added in S/R THSICE_STEP_FWD |
55 |
|
|
C EmPmR(out) :: Net fresh water flux out off the ocean (ice-free ocean only) |
56 |
|
|
C and the Ice-Covered contribution will be added in S/R THSICE_STEP_FWD |
57 |
|
|
C sHeating(in/out) :: air - seaice surface heat flux left to melt the ice |
58 |
jmc |
1.5 |
C icFrwAtm :: Evaporation over sea-ice [kg/m2/s] (>0 if evaporate) |
59 |
|
|
C icFlxSW :: net SW heat flux through the ice to the ocean [W/m2] (+=dw) |
60 |
jmc |
1.3 |
C if not using thSIce: |
61 |
|
|
C Qsw(out) :: SW radiation down to the ocean (ice-free + ice-covered)(+=up) |
62 |
|
|
C Qnet(out) :: Net heat flux out of the ocean (ice-free + ice-covered)(+=up) |
63 |
|
|
C EmPmR(out) :: Net fresh water flux out off the ocean (ice-free + ice-covered) |
64 |
|
|
|
65 |
jmc |
1.1 |
C !INPUT/OUTPUT PARAMETERS: |
66 |
|
|
C == Routine arguments == |
67 |
|
|
C land_frc :: land fraction [0-1] |
68 |
jmc |
1.2 |
C siceFrac :: sea-ice fraction (relative to full grid-cell) [0-1] |
69 |
jmc |
1.1 |
C prcAtm :: total precip from the atmosphere [kg/m2/s] |
70 |
jmc |
1.9 |
C snowPrc :: snow precip over sea-ice [kg/m2/s] |
71 |
jmc |
1.7 |
C bi,bj :: Tile indices |
72 |
jmc |
1.1 |
C myTime :: Current time of simulation ( s ) |
73 |
|
|
C myIter :: Current iteration number in simulation |
74 |
jmc |
1.3 |
C myThid :: My Thread Id number |
75 |
jmc |
1.1 |
_RS land_frc(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
76 |
jmc |
1.2 |
_RL siceFrac(sNx,sNy) |
77 |
jmc |
1.9 |
_RL prcAtm (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
78 |
|
|
_RL snowPrc(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
79 |
jmc |
1.1 |
INTEGER bi, bj, myIter, myThid |
80 |
|
|
_RL myTime |
81 |
|
|
CEOP |
82 |
|
|
|
83 |
|
|
#ifdef ALLOW_AIM |
84 |
|
|
C == Local variables == |
85 |
jmc |
1.8 |
C i,j,I2 :: loop counters |
86 |
jmc |
1.9 |
C convPrcEvp :: units conversion factor for Precip & Evap: |
87 |
jmc |
1.8 |
C :: from AIM units (g/m2/s) to model EmPmR units ( kg/m2/s ) |
88 |
|
|
_RL convPrcEvp |
89 |
jmc |
1.1 |
_RL icFrac, opFrac |
90 |
|
|
INTEGER i,j,I2 |
91 |
|
|
|
92 |
|
|
C-- Initialisation : |
93 |
|
|
|
94 |
|
|
C-- Atmospheric Physics Fluxes |
95 |
|
|
|
96 |
jmc |
1.2 |
C from g/m2/s to kg/m2/s : |
97 |
jmc |
1.8 |
convPrcEvp = 1. _d -3 |
98 |
jmc |
1.1 |
|
99 |
|
|
DO j=1,sNy |
100 |
jmc |
1.4 |
DO i=1,sNx |
101 |
|
|
IF ( land_frc(i,j,bi,bj).GE.1. _d 0 ) THEN |
102 |
|
|
C- Full Land grid-cell: set all fluxes to zero (this has no effect on the |
103 |
|
|
C model integration and just put this to get meaningfull diagnostics) |
104 |
|
|
prcAtm(i,j) = 0. _d 0 |
105 |
|
|
Qnet(i,j,bi,bj) = 0. _d 0 |
106 |
|
|
EmPmR(i,j,bi,bj)= 0. _d 0 |
107 |
|
|
Qsw(i,j,bi,bj) = 0. _d 0 |
108 |
|
|
ELSE |
109 |
jmc |
1.1 |
I2 = i+(j-1)*sNx |
110 |
|
|
|
111 |
jmc |
1.3 |
C- Total Precip (no distinction between ice-covered / ice-free fraction): |
112 |
jmc |
1.1 |
prcAtm(i,j) = ( PRECNV(I2,myThid) |
113 |
|
|
& + PRECLS(I2,myThid) ) |
114 |
|
|
|
115 |
|
|
C- Net surface heat flux over ice-free ocean (+=down) |
116 |
jmc |
1.3 |
C note: with aim_splitSIOsFx=F, ice-free & ice covered contribution are |
117 |
|
|
C already merged together and Qnet is the mean heat flux over the grid box. |
118 |
|
|
Qnet(i,j,bi,bj) = |
119 |
jmc |
1.1 |
& SSR(I2,2,myThid) |
120 |
|
|
& - SLR(I2,2,myThid) |
121 |
|
|
& - SHF(I2,2,myThid) |
122 |
|
|
& - EVAP(I2,2,myThid)*ALHC |
123 |
|
|
|
124 |
jmc |
1.3 |
C- E-P over ice-free ocean [m/s]: (same as above is aim_splitSIOsFx=F) |
125 |
jmc |
1.1 |
EmPmR(i,j,bi,bj) = ( EVAP(I2,2,myThid) |
126 |
jmc |
1.8 |
& - prcAtm(i,j) ) * convPrcEvp |
127 |
jmc |
1.1 |
|
128 |
|
|
C- Net short wave (ice-free ocean) into the ocean (+=down) |
129 |
|
|
Qsw(i,j,bi,bj) = SSR(I2,2,myThid) |
130 |
|
|
|
131 |
jmc |
1.4 |
ENDIF |
132 |
|
|
ENDDO |
133 |
jmc |
1.1 |
ENDDO |
134 |
|
|
|
135 |
|
|
#ifdef ALLOW_THSICE |
136 |
|
|
IF ( useThSIce ) THEN |
137 |
|
|
DO j=1,sNy |
138 |
|
|
DO i=1,sNx |
139 |
|
|
I2 = i+(j-1)*sNx |
140 |
jmc |
1.3 |
C- Mixed-Layer Ocean: (for thsice slab_ocean and coupler) |
141 |
jmc |
1.7 |
C NOTE: masking is now applied much earlier, during initialisation |
142 |
|
|
c IF (land_frc(i,j,bi,bj).EQ.1. _d 0) hOceMxL(i,j,bi,bj) = 0. |
143 |
jmc |
1.1 |
|
144 |
jmc |
1.3 |
C- Evaporation over sea-ice: (for thsice) |
145 |
jmc |
1.8 |
icFrwAtm(i,j,bi,bj) = EVAP(I2,3,myThid)*convPrcEvp |
146 |
jmc |
1.1 |
|
147 |
jmc |
1.3 |
C- short-wave downward heat flux (ice-free ocean + ice-covered): |
148 |
jmc |
1.5 |
C note: at this point we already called THSICE_IMPL_TEMP to solve for |
149 |
jmc |
1.3 |
C seaice temp and SW flux through the ice. SW is not modified after, and |
150 |
|
|
C can therefore combine the open-ocean & ice-covered ocean SW fluxes. |
151 |
jmc |
1.1 |
icFrac = iceMask(i,j,bi,bj) |
152 |
|
|
opFrac = 1. _d 0 - icFrac |
153 |
jmc |
1.5 |
Qsw(i,j,bi,bj) = icFrac*icFlxSW(i,j,bi,bj) |
154 |
|
|
& + opFrac*Qsw(i,j,bi,bj) |
155 |
jmc |
1.1 |
|
156 |
|
|
ENDDO |
157 |
|
|
ENDDO |
158 |
|
|
|
159 |
jmc |
1.3 |
IF ( aim_energPrecip ) THEN |
160 |
jmc |
1.1 |
C-- Add energy flux related to Precip. (snow, T_rain) over sea-ice |
161 |
jmc |
1.3 |
DO j=1,sNy |
162 |
|
|
DO i=1,sNx |
163 |
|
|
IF ( iceMask(i,j,bi,bj).GT.0. _d 0 ) THEN |
164 |
|
|
I2 = i+(j-1)*sNx |
165 |
|
|
IF ( EnPrec(I2,myThid).GE.0. _d 0 ) THEN |
166 |
jmc |
1.1 |
C- positive => add to surface heating |
167 |
jmc |
1.3 |
sHeating(i,j,bi,bj) = sHeating(i,j,bi,bj) |
168 |
|
|
& + EnPrec(I2,myThid)*prcAtm(i,j) |
169 |
jmc |
1.9 |
snowPrc(i,j) = 0. _d 0 |
170 |
jmc |
1.3 |
ELSE |
171 |
jmc |
1.1 |
C- negative => make snow |
172 |
jmc |
1.9 |
snowPrc(i,j) = prcAtm(i,j)*convPrcEvp |
173 |
jmc |
1.3 |
ENDIF |
174 |
|
|
ELSE |
175 |
jmc |
1.9 |
snowPrc(i,j) = 0. _d 0 |
176 |
jmc |
1.3 |
ENDIF |
177 |
|
|
ENDDO |
178 |
|
|
ENDDO |
179 |
|
|
ENDIF |
180 |
|
|
|
181 |
jmc |
1.2 |
ELSEIF ( aim_splitSIOsFx ) THEN |
182 |
|
|
#else /* ALLOW_THSICE */ |
183 |
|
|
IF ( aim_splitSIOsFx ) THEN |
184 |
|
|
#endif /* ALLOW_THSICE */ |
185 |
jmc |
1.3 |
C- aim_splitSIOsFx=T: fluxes over sea-ice (3) & ice-free ocean (2) were |
186 |
|
|
C computed separately and here we merge the 2 fractions |
187 |
jmc |
1.2 |
DO j=1,sNy |
188 |
|
|
DO i=1,sNx |
189 |
|
|
I2 = i+(j-1)*sNx |
190 |
|
|
IF ( siceFrac(i,j) .GT. 0. ) THEN |
191 |
|
|
icFrac = siceFrac(i,j)/(1. _d 0 - land_frc(i,j,bi,bj)) |
192 |
|
|
opFrac = 1. _d 0 - icFrac |
193 |
|
|
|
194 |
|
|
C- Net surface heat flux over sea-ice + ice-free ocean (+=down) |
195 |
|
|
Qnet(i,j,bi,bj) = Qnet(i,j,bi,bj)*opFrac |
196 |
|
|
& + ( SSR(I2,3,myThid) |
197 |
|
|
& - SLR(I2,3,myThid) |
198 |
|
|
& - SHF(I2,3,myThid) |
199 |
|
|
& - EVAP(I2,3,myThid)*ALHC |
200 |
|
|
& )*icFrac |
201 |
|
|
C- E-P over sea-ice + ice-free ocean [m/s]: |
202 |
|
|
EmPmR(i,j,bi,bj) = EmPmR(i,j,bi,bj)*opFrac |
203 |
|
|
& + ( EVAP(I2,3,myThid) |
204 |
jmc |
1.8 |
& - prcAtm(i,j) ) * convPrcEvp * icFrac |
205 |
jmc |
1.2 |
|
206 |
|
|
C- Net short wave (ice-free ocean) into the ocean (+=down) |
207 |
|
|
Qsw(i,j,bi,bj) = opFrac*Qsw(i,j,bi,bj) |
208 |
|
|
& + icFrac*SSR(I2,3,myThid) |
209 |
|
|
|
210 |
jmc |
1.1 |
ENDIF |
211 |
|
|
ENDDO |
212 |
|
|
ENDDO |
213 |
jmc |
1.3 |
|
214 |
|
|
C-- end of If useThSIce / elseif aim_splitSIOsFx blocks |
215 |
jmc |
1.2 |
ENDIF |
216 |
|
|
|
217 |
|
|
IF ( aim_energPrecip ) THEN |
218 |
jmc |
1.3 |
C-- Ice free fraction: Add energy flux related to Precip. (snow, T_rain): |
219 |
jmc |
1.2 |
DO j=1,sNy |
220 |
|
|
DO i=1,sNx |
221 |
|
|
I2 = i+(j-1)*sNx |
222 |
|
|
Qnet(i,j,bi,bj) = Qnet(i,j,bi,bj) |
223 |
|
|
& + EnPrec(I2,myThid)*prcAtm(i,j) |
224 |
|
|
ENDDO |
225 |
|
|
ENDDO |
226 |
jmc |
1.1 |
ENDIF |
227 |
|
|
|
228 |
|
|
DO j=1,sNy |
229 |
|
|
DO i=1,sNx |
230 |
|
|
C- Total Precip : convert units |
231 |
jmc |
1.8 |
prcAtm(i,j) = prcAtm(i,j) * convPrcEvp |
232 |
jmc |
1.1 |
C- Oceanic convention: Heat flux are > 0 upward ; reverse sign. |
233 |
|
|
Qsw(i,j,bi,bj) = -Qsw(i,j,bi,bj) |
234 |
|
|
Qnet(i,j,bi,bj)= -Qnet(i,j,bi,bj) |
235 |
|
|
ENDDO |
236 |
|
|
ENDDO |
237 |
|
|
|
238 |
|
|
#endif /* ALLOW_AIM */ |
239 |
|
|
|
240 |
|
|
RETURN |
241 |
|
|
END |