| 1 |
C $Header: /u/gcmpack/MITgcm/pkg/frazil/frazil_calc_rhs.F,v 1.1 2012/03/02 01:45:22 dimitri Exp $ |
| 2 |
C $Name: $ |
| 3 |
|
| 4 |
#include "FRAZIL_OPTIONS.h" |
| 5 |
|
| 6 |
CBOP |
| 7 |
C !ROUTINE: FRAZIL_CALC_RHS |
| 8 |
|
| 9 |
C !INTERFACE: ========================================================== |
| 10 |
SUBROUTINE FRAZIL_CALC_RHS( |
| 11 |
I myTime, myIter, myThid ) |
| 12 |
|
| 13 |
C !DESCRIPTION: |
| 14 |
C Check water temperature and if colder than freezing |
| 15 |
C point bring excess negative heat to the surface. |
| 16 |
|
| 17 |
C !USES: =============================================================== |
| 18 |
IMPLICIT NONE |
| 19 |
#include "SIZE.h" |
| 20 |
#include "EEPARAMS.h" |
| 21 |
#include "PARAMS.h" |
| 22 |
#include "DYNVARS.h" |
| 23 |
#include "GRID.h" |
| 24 |
#include "FFIELDS.h" |
| 25 |
#include "FRAZIL.h" |
| 26 |
|
| 27 |
C !INPUT/OUTPUT PARAMETERS: |
| 28 |
C == Routine Arguments == |
| 29 |
C myTime - Current time in simulation |
| 30 |
C myIter - Current iteration number in simulation |
| 31 |
C myThid :: Thread no. that called this routine. |
| 32 |
_RL myTime |
| 33 |
INTEGER myIter |
| 34 |
INTEGER myThid |
| 35 |
|
| 36 |
#ifdef ALLOW_FRAZIL |
| 37 |
C !LOCAL VARIABLES: ==================================================== |
| 38 |
C Tfreezing :: Freezing threshold temperature. |
| 39 |
INTEGER bi,bj,i,j,k,kTop |
| 40 |
_RL Tfreezing, Tresid, pLoc, sLoc, tLoc |
| 41 |
_RL a0, a1, a2, b |
| 42 |
PARAMETER( a0 = -0.0575 _d 0 ) |
| 43 |
PARAMETER( a1 = 1.710523 _d -3 ) |
| 44 |
PARAMETER( a2 = -2.154996 _d -4 ) |
| 45 |
PARAMETER( b = -7.53 _d -4 ) |
| 46 |
|
| 47 |
_RL SW_TEMP |
| 48 |
EXTERNAL SW_TEMP |
| 49 |
CEOP |
| 50 |
|
| 51 |
C-- Check for water below freezing point. |
| 52 |
DO bj=myByLo(myThid),myByHi(myThid) |
| 53 |
DO bi=myBxLo(myThid),myBxHi(myThid) |
| 54 |
DO j=1-OLy,sNy+OLy |
| 55 |
DO i=1-OLx,sNx+OLx |
| 56 |
kTop = kSurfC(i,j,bi,bj) |
| 57 |
DO k = (kTop+1), Nr |
| 58 |
IF ( maskC(i,j,k-1,bi,bj) .NE. 0. _d 0 .AND. |
| 59 |
& maskC(i,j,k, bi,bj) .NE. 0. _d 0 ) THEN |
| 60 |
|
| 61 |
pLoc = ABS(RC(k)) |
| 62 |
sLoc = MAX(salt(i,j,k,bi,bj), 0. _d 0) |
| 63 |
tLoc = SW_TEMP(sLoc,theta(i,j,k,bi,bj),pLoc,0. _d 0) |
| 64 |
|
| 65 |
C Freezing point of seawater |
| 66 |
C REFERENCE: UNESCO TECH. PAPERS IN THE MARINE SCIENCE NO. 28. 1978 |
| 67 |
C EIGHTH REPORT JPOTS |
| 68 |
C ANNEX 6 FREEZING POINT OF SEAWATER F.J. MILLERO PP.29-35. |
| 69 |
C |
| 70 |
C UNITS: |
| 71 |
C PRESSURE P DECIBARS |
| 72 |
C SALINITY S PSS-78 |
| 73 |
C TEMPERATURE TF DEGREES CELSIUS |
| 74 |
C FREEZING PT. |
| 75 |
C************************************************************ |
| 76 |
C CHECKVALUE: TF= -2.588567 DEG. C FOR S=40.0, P=500. DECIBARS |
| 77 |
Tfreezing = (a0 + a1*sqrt(sLoc) + a2*sLoc) * sLoc + b*pLoc |
| 78 |
|
| 79 |
IF (tLoc .LT. Tfreezing) THEN |
| 80 |
C Move the negative heat to surface level. |
| 81 |
Tresid = Tfreezing - tloc |
| 82 |
FrazilForcingT(i,j,k,bi,bj) = |
| 83 |
& Tresid / dTtracerLev(k) |
| 84 |
& * HeatCapacity_Cp * rUnit2mass |
| 85 |
& * drF(k) * _hFacC(i,j,k,bi,bj) |
| 86 |
FrazilForcingT(i,j,kTop,bi,bj) = |
| 87 |
& - Tresid / dTtracerLev(kTop) |
| 88 |
& * HeatCapacity_Cp * rUnit2mass |
| 89 |
& * drF(k) * _hFacC(i,j,k,bi,bj) |
| 90 |
ENDIF |
| 91 |
ENDIF |
| 92 |
ENDDO |
| 93 |
ENDDO |
| 94 |
ENDDO |
| 95 |
ENDDO |
| 96 |
ENDDO |
| 97 |
|
| 98 |
#endif /* ALLOW_FRAZIL */ |
| 99 |
|
| 100 |
RETURN |
| 101 |
END |
Parent Directory
| 
Revision Log
| 
Revision Graph