1 |
mlosch |
1.25 |
C $Header: /u/gcmpack/MITgcm/pkg/seaice/seaice_ocean_stress.F,v 1.24 2009/05/29 14:51:21 mlosch Exp $ |
2 |
mlosch |
1.1 |
C $Name: $ |
3 |
|
|
|
4 |
|
|
#include "SEAICE_OPTIONS.h" |
5 |
|
|
|
6 |
|
|
CStartOfInterface |
7 |
jmc |
1.19 |
SUBROUTINE SEAICE_OCEAN_STRESS( |
8 |
mlosch |
1.1 |
I myTime, myIter, myThid ) |
9 |
|
|
C /==========================================================\ |
10 |
|
|
C | SUBROUTINE SEAICE_OCEAN_STRESS | |
11 |
|
|
C | o Calculate ocean surface stresses | |
12 |
|
|
C | - C-grid version | |
13 |
|
|
C |==========================================================| |
14 |
|
|
C \==========================================================/ |
15 |
|
|
IMPLICIT NONE |
16 |
|
|
|
17 |
|
|
C === Global variables === |
18 |
|
|
#include "SIZE.h" |
19 |
|
|
#include "EEPARAMS.h" |
20 |
|
|
#include "PARAMS.h" |
21 |
dimitri |
1.21 |
#include "DYNVARS.h" |
22 |
mlosch |
1.5 |
#include "GRID.h" |
23 |
mlosch |
1.1 |
#include "FFIELDS.h" |
24 |
|
|
#include "SEAICE.h" |
25 |
|
|
#include "SEAICE_PARAMS.h" |
26 |
|
|
|
27 |
|
|
C === Routine arguments === |
28 |
|
|
C myTime - Simulation time |
29 |
|
|
C myIter - Simulation timestep number |
30 |
|
|
C myThid - Thread no. that called this routine. |
31 |
|
|
_RL myTime |
32 |
|
|
INTEGER myIter |
33 |
|
|
INTEGER myThid |
34 |
|
|
CEndOfInterface |
35 |
|
|
|
36 |
jmc |
1.19 |
#ifdef SEAICE_CGRID |
37 |
mlosch |
1.1 |
C === Local variables === |
38 |
|
|
C i,j,bi,bj - Loop counters |
39 |
|
|
|
40 |
|
|
INTEGER i, j, bi, bj |
41 |
mlosch |
1.5 |
_RL SINWAT, COSWAT, SINWIN, COSWIN |
42 |
mlosch |
1.24 |
_RL fuIceLoc, fvIceLoc |
43 |
mlosch |
1.4 |
_RL areaW, areaS |
44 |
mlosch |
1.1 |
|
45 |
|
|
c introduce turning angle (default is zero) |
46 |
|
|
SINWAT=SIN(SEAICE_waterTurnAngle*deg2rad) |
47 |
|
|
COSWAT=COS(SEAICE_waterTurnAngle*deg2rad) |
48 |
mlosch |
1.5 |
SINWIN=SIN(SEAICE_airTurnAngle*deg2rad) |
49 |
|
|
COSWIN=COS(SEAICE_airTurnAngle*deg2rad) |
50 |
mlosch |
1.1 |
|
51 |
mlosch |
1.5 |
IF ( useHB87StressCoupling ) THEN |
52 |
|
|
C |
53 |
jmc |
1.19 |
C use an intergral over ice and ocean surface layer to define |
54 |
mlosch |
1.5 |
C surface stresses on ocean following Hibler and Bryan (1987, JPO) |
55 |
jmc |
1.19 |
C |
56 |
mlosch |
1.5 |
DO bj=myByLo(myThid),myByHi(myThid) |
57 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
58 |
mlosch |
1.24 |
DO J=1,sNy |
59 |
|
|
DO I=1,sNx |
60 |
jmc |
1.19 |
C average wind stress over ice and ocean and apply averaged wind |
61 |
mlosch |
1.14 |
C stress and internal ice stresses to surface layer of ocean |
62 |
mlosch |
1.25 |
areaW = 0.5 * (AREA(I,J,bi,bj) + AREA(I-1,J,bi,bj)) |
63 |
mlosch |
1.24 |
& * SEAICEstressFactor |
64 |
mlosch |
1.25 |
areaS = 0.5 * (AREA(I,J,bi,bj) + AREA(I,J-1,bi,bj)) |
65 |
mlosch |
1.24 |
& * SEAICEstressFactor |
66 |
|
|
fu(I,J,bi,bj)=(ONE-areaW)*fu(I,J,bi,bj) |
67 |
|
|
& + areaW*taux(I,J,bi,bj) |
68 |
|
|
& + stressDivergenceX(I,J,bi,bj) * SEAICEstressFactor |
69 |
|
|
fv(I,J,bi,bj)=(ONE-areaS)*fv(I,J,bi,bj) |
70 |
|
|
& + areaS*tauy(I,J,bi,bj) |
71 |
|
|
& + stressDivergenceY(I,J,bi,bj) * SEAICEstressFactor |
72 |
mlosch |
1.14 |
ENDDO |
73 |
mlosch |
1.24 |
ENDDO |
74 |
mlosch |
1.5 |
ENDDO |
75 |
|
|
ENDDO |
76 |
jmc |
1.17 |
|
77 |
mlosch |
1.5 |
ELSE |
78 |
jmc |
1.17 |
C else: useHB87StressCoupling=F |
79 |
mlosch |
1.5 |
|
80 |
jmc |
1.19 |
C-- Compute ice-affected wind stress (interpolate to U/V-points) |
81 |
|
|
C by averaging wind stress and ice-ocean stress according to |
82 |
mlosch |
1.5 |
C ice cover |
83 |
mlosch |
1.1 |
DO bj=myByLo(myThid),myByHi(myThid) |
84 |
|
|
DO bi=myBxLo(myThid),myBxHi(myThid) |
85 |
|
|
DO j=1,sNy |
86 |
|
|
DO i=1,sNx |
87 |
mlosch |
1.18 |
fuIceLoc=HALF*( DWATN(I,J,bi,bj)+DWATN(I-1,J,bi,bj) )* |
88 |
jmc |
1.19 |
& COSWAT * |
89 |
mlosch |
1.25 |
& ( UICE(I,J,bi,bj)-uVel(I,J,1,bi,bj) ) |
90 |
jmc |
1.19 |
& - SIGN(SINWAT, _fCori(I,J,bi,bj)) * 0.5 _d 0 * |
91 |
mlosch |
1.6 |
& ( DWATN(I ,J,bi,bj) * |
92 |
mlosch |
1.25 |
& 0.5 _d 0*(vIce(I ,J ,bi,bj)-vVel(I ,J ,1,bi,bj) |
93 |
|
|
& +vIce(I ,J+1,bi,bj)-vVel(I ,J+1,1,bi,bj)) |
94 |
mlosch |
1.6 |
& + DWATN(I-1,J,bi,bj) * |
95 |
mlosch |
1.25 |
& 0.5 _d 0*(vIce(I-1,J ,bi,bj)-vVel(I-1,J ,1,bi,bj) |
96 |
|
|
& +vIce(I-1,J+1,bi,bj)-vVel(I-1,J+1,1,bi,bj)) |
97 |
mlosch |
1.1 |
& ) |
98 |
mlosch |
1.18 |
fvIceLoc=HALF*( DWATN(I,J,bi,bj)+DWATN(I,J-1,bi,bj) )* |
99 |
mlosch |
1.6 |
& COSWAT * |
100 |
mlosch |
1.25 |
& ( VICE(I,J,bi,bj)-vVel(I,J,1,bi,bj) ) |
101 |
mlosch |
1.6 |
& + SIGN(SINWAT, _fCori(I,J,bi,bj)) * 0.5 _d 0 * |
102 |
|
|
& ( DWATN(I,J ,bi,bj) * |
103 |
mlosch |
1.25 |
& 0.5 _d 0*(uIce(I ,J ,bi,bj)-uVel(I ,J ,1,bi,bj) |
104 |
|
|
& +uIce(I+1,J ,bi,bj)-uVel(I+1,J ,1,bi,bj)) |
105 |
mlosch |
1.6 |
& + DWATN(I,J-1,bi,bj) * |
106 |
mlosch |
1.25 |
& 0.5 _d 0*(uIce(I ,J-1,bi,bj)-uVel(I ,J-1,1,bi,bj) |
107 |
|
|
& +uIce(I+1,J-1,bi,bj)-uVel(I+1,J-1,1,bi,bj)) |
108 |
mlosch |
1.1 |
& ) |
109 |
mlosch |
1.25 |
areaW = 0.5 _d 0 * (AREA(I,J,bi,bj) + AREA(I-1,J,bi,bj)) |
110 |
mlosch |
1.9 |
& * SEAICEstressFactor |
111 |
mlosch |
1.25 |
areaS = 0.5 _d 0 * (AREA(I,J,bi,bj) + AREA(I,J-1,bi,bj)) |
112 |
mlosch |
1.9 |
& * SEAICEstressFactor |
113 |
mlosch |
1.11 |
fu(I,J,bi,bj)=(ONE-areaW)*fu(I,J,bi,bj)+areaW*fuIceLoc |
114 |
|
|
fv(I,J,bi,bj)=(ONE-areaS)*fv(I,J,bi,bj)+areaS*fvIceLoc |
115 |
mlosch |
1.1 |
ENDDO |
116 |
|
|
ENDDO |
117 |
|
|
ENDDO |
118 |
|
|
ENDDO |
119 |
mlosch |
1.5 |
ENDIF |
120 |
mlosch |
1.1 |
CALL EXCH_UV_XY_RS(fu, fv, .TRUE., myThid) |
121 |
mlosch |
1.3 |
|
122 |
jmc |
1.17 |
#endif /* SEAICE_CGRID */ |
123 |
mlosch |
1.1 |
|
124 |
|
|
RETURN |
125 |
|
|
END |