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mlosch |
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C $Header: $ |
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C $Name: $ |
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#include "KPP_OPTIONS.h" |
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CBOP |
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C !ROUTINE: KPP_FORCING_SURF |
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C !INTERFACE: ========================================================== |
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SUBROUTINE KPP_FORCING_SURF( |
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I rhoSurf, surfForcU, surfForcV, |
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I surfForcT, surfForcS, surfForcTice, |
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I Qsw, ttalpha, ssbeta, |
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O ustar, bo, bosol, dVsq, |
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I ikppkey, iMin, iMax, jMin, jMax, bi, bj, myTime, myThid ) |
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C !DESCRIPTION: \bv |
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C /==========================================================\ |
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C | SUBROUTINE KPP_FORCING_SURF | |
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C | o Compute all surface related KPP fields: | |
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C | - friction velocity ustar | |
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C | - turbulent and radiative surface buoyancy forcing, | |
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C | bo and bosol | |
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C | - velocity shear relative to surface squared (this is | |
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C | not really a surface affected quantity unless it is | |
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C | computed with respect to some resolution independent | |
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C | reference level, that is KPP_ESTIMATE_UREF defined ) | |
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C |==========================================================| |
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C \==========================================================/ |
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IMPLICIT NONE |
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c taux / rho = surfForcU (N/m^2) |
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c tauy / rho = surfForcV (N/m^2) |
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c ustar = sqrt( sqrt( taux^2 + tauy^2 ) / rho ) (m/s) |
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c bo = - g * ( alpha*surfForcT + |
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c beta *surfForcS ) / rho (m^2/s^3) |
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c bosol = - g * alpha * Qsw * drF(1) / rho (m^2/s^3) |
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c------------------------------------------------------------------------ |
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c \ev |
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C !USES: =============================================================== |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "GRID.h" |
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#include "DYNVARS.h" |
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#include "KPP_PARAMS.h" |
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C !INPUT PARAMETERS: =================================================== |
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C Routine arguments |
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C ikppkeyb - key for storing trajectory for adjoint (taf) |
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c imin, imax, jmin, jmax - array computation indices |
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C bi, bj - array indices on which to apply calculations |
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C myTime - Current time in simulation |
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C myThid - Current thread id |
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c rhoSurf- density of surface layer (kg/m^3) |
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C surfForcU units are r_unit.m/s^2 (=m^2/s^2 if r=z) |
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C surfForcV units are r_unit.m/s^2 (=m^2/s^-2 if r=z) |
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C surfForcS units are r_unit.psu/s (=psu.m/s if r=z) |
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C - EmPmR * S_surf plus salinity relaxation*drF(1) |
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C surfForcT units are r_unit.Kelvin/s (=Kelvin.m/s if r=z) |
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C - Qnet (+Qsw) plus temp. relaxation*drF(1) |
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C -> calculate -lambda*(T(model)-T(clim)) |
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C Qnet assumed to be net heat flux including ShortWave rad. |
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C surfForcTice |
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C - equivalent Temperature flux in the top level that corresponds |
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C to the melting or freezing of sea-ice. |
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C Note that the surface level temperature is modified |
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C directly by the sea-ice model in order to maintain |
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C water temperature under sea-ice at the freezing |
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C point. But we need to keep track of the |
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C equivalent amount of heat that this surface-level |
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C temperature change implies because it is used by |
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C the KPP package (kpp_calc.F and kpp_transport_t.F). |
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C Units are r_unit.K/s (=Kelvin.m/s if r=z) (>0 for ocean warming). |
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C |
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C Qsw - surface shortwave radiation (upwards positive) |
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C ttalpha - thermal expansion coefficient without 1/rho factor |
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C d(rho{k,k})/d(T(k)) (kg/m^3/C) |
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C ssbeta - salt expansion coefficient without 1/rho factor |
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C d(rho{k,k})/d(S(k)) (kg/m^3/PSU) |
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C ustar (nx,ny) - surface friction velocity (m/s) |
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C bo (nx,ny) - surface turbulent buoyancy forcing (m^2/s^3) |
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C bosol (nx,ny) - surface radiative buoyancy forcing (m^2/s^3) |
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C dVsq (nx,ny,Nr) - velocity shear re surface squared |
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C at grid levels for bldepth (m^2/s^2) |
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INTEGER ikppkey |
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INTEGER iMin, iMax, jMin, jMax |
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INTEGER bi, bj |
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INTEGER myThid |
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_RL myTime |
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_RL rhoSurf (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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_RL surfForcU (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL surfForcV (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL surfForcT (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL surfForcS (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL surfForcTice(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL Qsw (1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy) |
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_RL TTALPHA (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nrp1) |
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_RL SSBETA (1-OLx:sNx+OLx,1-OLy:sNy+OLy,Nrp1) |
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_RL ustar ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL bo ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL bosol ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL dVsq ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy, Nr ) |
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C !LOCAL VARIABLES: ==================================================== |
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c Local constants |
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c minusone, p0, p5, p25, p125, p0625 |
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_RL p0 , p5 , p125 |
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parameter( p0=0.0, p5=0.5, p125=0.125 ) |
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integer i, j, k, im1, ip1, jm1, jp1 |
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_RL tempvar2 |
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_RL work3 ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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#ifdef KPP_ESTIMATE_UREF |
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_RL tempvar1, dBdz1, dBdz2, ustarX, ustarY |
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_RL z0 ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL zRef ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL uRef ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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_RL vRef ( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
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#endif |
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CEOP |
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c------------------------------------------------------------------------ |
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c friction velocity, turbulent and radiative surface buoyancy forcing |
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c ------------------------------------------------------------------- |
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c taux / rho = surfForcU (N/m^2) |
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c tauy / rho = surfForcV (N/m^2) |
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c ustar = sqrt( sqrt( taux^2 + tauy^2 ) / rho ) (m/s) |
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c bo = - g * ( alpha*surfForcT + |
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c beta *surfForcS ) / rho (m^2/s^3) |
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c bosol = - g * alpha * Qsw * drF(1) / rho (m^2/s^3) |
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c------------------------------------------------------------------------ |
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c initialize arrays to zero |
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DO j = 1-OLy, sNy+OLy |
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DO i = 1-OLx, sNx+OLx |
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ustar(i,j) = p0 |
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bo (I,J) = p0 |
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bosol(I,J) = p0 |
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END DO |
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END DO |
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DO j = jmin, jmax |
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jp1 = j + 1 |
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DO i = imin, imax |
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ip1 = i+1 |
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work3(i,j) = |
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& (surfForcU(i,j,bi,bj) + surfForcU(ip1,j,bi,bj)) * |
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& (surfForcU(i,j,bi,bj) + surfForcU(ip1,j,bi,bj)) + |
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& (surfForcV(i,j,bi,bj) + surfForcV(i,jp1,bi,bj)) * |
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& (surfForcV(i,j,bi,bj) + surfForcV(i,jp1,bi,bj)) |
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END DO |
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END DO |
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cph( |
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CADJ store work3 = comlev1_kpp, key = ikppkey |
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cph) |
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DO j = jmin, jmax |
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jp1 = j + 1 |
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DO i = imin, imax |
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ip1 = i+1 |
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if ( work3(i,j) .lt. (phepsi*phepsi*drF(1)*drF(1)) ) then |
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ustar(i,j) = SQRT( phepsi * p5 * drF(1) ) |
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else |
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tempVar2 = SQRT( work3(i,j) ) * p5 |
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ustar(i,j) = SQRT( tempVar2 ) |
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endif |
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END DO |
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END DO |
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DO j = jmin, jmax |
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jp1 = j + 1 |
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DO i = imin, imax |
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ip1 = i+1 |
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bo(I,J) = - gravity * |
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& ( TTALPHA(I,J,1) * (surfForcT(i,j,bi,bj)+ |
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& surfForcTice(i,j,bi,bj)) + |
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& SSBETA(I,J,1) * surfForcS(i,j,bi,bj) ) |
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& / rhoSurf(I,J) |
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bosol(I,J) = gravity * TTALPHA(I,J,1) * Qsw(i,j,bi,bj) * |
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& recip_Cp*recip_rhoConst |
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& / rhoSurf(I,J) |
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END DO |
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END DO |
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cph( |
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CADJ store ustar = comlev1_kpp, key = ikppkey |
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cph) |
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c------------------------------------------------------------------------ |
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c velocity shear |
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c -------------- |
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c Get velocity shear squared, averaged from "u,v-grid" |
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c onto "t-grid" (in (m/s)**2): |
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c dVsq(k)=(Uref-U(k))**2+(Vref-V(k))**2 at grid levels |
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c------------------------------------------------------------------------ |
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c initialize arrays to zero |
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DO k = 1, Nr |
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DO j = 1-OLy, sNy+OLy |
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DO i = 1-OLx, sNx+OLx |
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dVsq(i,j,k) = p0 |
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END DO |
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END DO |
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END DO |
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c dVsq computation |
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#ifdef KPP_ESTIMATE_UREF |
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c Get rid of vertical resolution dependence of dVsq term by |
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c estimating a surface velocity that is independent of first level |
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c thickness in the model. First determine mixed layer depth hMix. |
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c Second zRef = espilon * hMix. Third determine roughness length |
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c scale z0. Third estimate reference velocity. |
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DO j = jmin, jmax |
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jp1 = j + 1 |
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DO i = imin, imax |
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ip1 = i + 1 |
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c Determine mixed layer depth hMix as the shallowest depth at which |
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c dB/dz exceeds 5.2e-5 s^-2. |
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work1(i,j) = nzmax(i,j,bi,bj) |
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DO k = 1, Nr |
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IF ( k .LT. nzmax(i,j,bi,bj) .AND. |
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& maskC(I,J,k,bi,bj) .GT. 0. .AND. |
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& dbloc(i,j,k) / drC(k+1) .GT. dB_dz ) |
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& work1(i,j) = k |
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ENDDO |
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c Linearly interpolate to find hMix. |
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k = work1(i,j) |
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IF ( k .EQ. 0 .OR. nzmax(i,j,bi,bj) .EQ. 1 ) THEN |
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zRef(i,j) = p0 |
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ELSEIF ( k .EQ. 1) THEN |
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dBdz2 = dbloc(i,j,1) / drC(2) |
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zRef(i,j) = drF(1) * dB_dz / dBdz2 |
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ELSEIF ( k .LT. nzmax(i,j,bi,bj) ) THEN |
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dBdz1 = dbloc(i,j,k-1) / drC(k ) |
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dBdz2 = dbloc(i,j,k ) / drC(k+1) |
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zRef(i,j) = rF(k) + drF(k) * (dB_dz - dBdz1) / |
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& MAX ( phepsi, dBdz2 - dBdz1 ) |
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ELSE |
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zRef(i,j) = rF(k+1) |
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ENDIF |
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c Compute roughness length scale z0 subject to 0 < z0 |
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tempVar1 = p5 * ( |
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& (uVel(i, j, 1,bi,bj)-uVel(i, j, 2,bi,bj)) * |
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& (uVel(i, j, 1,bi,bj)-uVel(i, j, 2,bi,bj)) + |
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& (uVel(ip1,j, 1,bi,bj)-uVel(ip1,j, 2,bi,bj)) * |
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& (uVel(ip1,j, 1,bi,bj)-uVel(ip1,j, 2,bi,bj)) + |
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& (vVel(i, j, 1,bi,bj)-vVel(i, j, 2,bi,bj)) * |
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& (vVel(i, j, 1,bi,bj)-vVel(i, j, 2,bi,bj)) + |
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& (vVel(i, jp1,1,bi,bj)-vVel(i, jp1,2,bi,bj)) * |
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& (vVel(i, jp1,1,bi,bj)-vVel(i, jp1,2,bi,bj)) ) |
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IF ( tempVar1 .lt. (epsln*epsln) ) THEN |
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tempVar2 = epsln |
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ELSE |
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tempVar2 = SQRT ( tempVar1 ) |
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ENDIF |
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z0(i,j) = rF(2) * |
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& ( rF(3) * LOG ( rF(3) / rF(2) ) / |
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& ( rF(3) - rF(2) ) - |
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& tempVar2 * vonK / |
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& MAX ( ustar(i,j), phepsi ) ) |
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z0(i,j) = MAX ( z0(i,j), phepsi ) |
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c zRef is set to 0.1 * hMix subject to z0 <= zRef <= drF(1) |
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zRef(i,j) = MAX ( epsilon * zRef(i,j), z0(i,j) ) |
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zRef(i,j) = MIN ( zRef(i,j), drF(1) ) |
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c Estimate reference velocity uRef and vRef. |
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uRef(i,j) = p5 * ( uVel(i,j,1,bi,bj) + uVel(ip1,j,1,bi,bj) ) |
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vRef(i,j) = p5 * ( vVel(i,j,1,bi,bj) + vVel(i,jp1,1,bi,bj) ) |
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IF ( zRef(i,j) .LT. drF(1) ) THEN |
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ustarX = ( surfForcU(i, j,bi,bj) + |
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& surfForcU(ip1,j,bi,bj) ) * p5 *recip_drF(1) |
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ustarY = ( surfForcV(i,j, bi,bj) + |
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& surfForcV(i,jp1,bi,bj) ) * p5 *recip_drF(1) |
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tempVar1 = ustarX * ustarX + ustarY * ustarY |
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if ( tempVar1 .lt. (epsln*epsln) ) then |
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tempVar2 = epsln |
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else |
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tempVar2 = SQRT ( tempVar1 ) |
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endif |
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tempVar2 = ustar(i,j) * |
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& ( LOG ( zRef(i,j) / rF(2) ) + |
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& z0(i,j) / zRef(i,j) - z0(i,j) / rF(2) ) / |
| 301 |
|
|
& vonK / tempVar2 |
| 302 |
|
|
uRef(i,j) = uRef(i,j) + ustarX * tempVar2 |
| 303 |
|
|
vRef(i,j) = vRef(i,j) + ustarY * tempVar2 |
| 304 |
|
|
ENDIF |
| 305 |
|
|
|
| 306 |
|
|
ENDDO |
| 307 |
|
|
ENDDO |
| 308 |
|
|
|
| 309 |
|
|
DO k = 1, Nr |
| 310 |
|
|
DO j = jmin, jmax |
| 311 |
|
|
jm1 = j - 1 |
| 312 |
|
|
jp1 = j + 1 |
| 313 |
|
|
DO i = imin, imax |
| 314 |
|
|
im1 = i - 1 |
| 315 |
|
|
ip1 = i + 1 |
| 316 |
|
|
dVsq(i,j,k) = p5 * ( |
| 317 |
|
|
$ (uRef(i,j) - uVel(i, j, k,bi,bj)) * |
| 318 |
|
|
$ (uRef(i,j) - uVel(i, j, k,bi,bj)) + |
| 319 |
|
|
$ (uRef(i,j) - uVel(ip1,j, k,bi,bj)) * |
| 320 |
|
|
$ (uRef(i,j) - uVel(ip1,j, k,bi,bj)) + |
| 321 |
|
|
$ (vRef(i,j) - vVel(i, j, k,bi,bj)) * |
| 322 |
|
|
$ (vRef(i,j) - vVel(i, j, k,bi,bj)) + |
| 323 |
|
|
$ (vRef(i,j) - vVel(i, jp1,k,bi,bj)) * |
| 324 |
|
|
$ (vRef(i,j) - vVel(i, jp1,k,bi,bj)) ) |
| 325 |
|
|
#ifdef KPP_SMOOTH_DVSQ |
| 326 |
|
|
dVsq(i,j,k) = p5 * dVsq(i,j,k) + p125 * ( |
| 327 |
|
|
$ (uRef(i,j) - uVel(i, jm1,k,bi,bj)) * |
| 328 |
|
|
$ (uRef(i,j) - uVel(i, jm1,k,bi,bj)) + |
| 329 |
|
|
$ (uRef(i,j) - uVel(ip1,jm1,k,bi,bj)) * |
| 330 |
|
|
$ (uRef(i,j) - uVel(ip1,jm1,k,bi,bj)) + |
| 331 |
|
|
$ (uRef(i,j) - uVel(i, jp1,k,bi,bj)) * |
| 332 |
|
|
$ (uRef(i,j) - uVel(i, jp1,k,bi,bj)) + |
| 333 |
|
|
$ (uRef(i,j) - uVel(ip1,jp1,k,bi,bj)) * |
| 334 |
|
|
$ (uRef(i,j) - uVel(ip1,jp1,k,bi,bj)) + |
| 335 |
|
|
$ (vRef(i,j) - vVel(im1,j, k,bi,bj)) * |
| 336 |
|
|
$ (vRef(i,j) - vVel(im1,j, k,bi,bj)) + |
| 337 |
|
|
$ (vRef(i,j) - vVel(im1,jp1,k,bi,bj)) * |
| 338 |
|
|
$ (vRef(i,j) - vVel(im1,jp1,k,bi,bj)) + |
| 339 |
|
|
$ (vRef(i,j) - vVel(ip1,j, k,bi,bj)) * |
| 340 |
|
|
$ (vRef(i,j) - vVel(ip1,j, k,bi,bj)) + |
| 341 |
|
|
$ (vRef(i,j) - vVel(ip1,jp1,k,bi,bj)) * |
| 342 |
|
|
$ (vRef(i,j) - vVel(ip1,jp1,k,bi,bj)) ) |
| 343 |
|
|
#endif /* KPP_SMOOTH_DVSQ */ |
| 344 |
|
|
ENDDO |
| 345 |
|
|
ENDDO |
| 346 |
|
|
ENDDO |
| 347 |
|
|
|
| 348 |
|
|
#else /* KPP_ESTIMATE_UREF */ |
| 349 |
|
|
|
| 350 |
|
|
DO k = 1, Nr |
| 351 |
|
|
DO j = jmin, jmax |
| 352 |
|
|
jm1 = j - 1 |
| 353 |
|
|
jp1 = j + 1 |
| 354 |
|
|
DO i = imin, imax |
| 355 |
|
|
im1 = i - 1 |
| 356 |
|
|
ip1 = i + 1 |
| 357 |
|
|
dVsq(i,j,k) = p5 * ( |
| 358 |
|
|
$ (uVel(i, j, 1,bi,bj)-uVel(i, j, k,bi,bj)) * |
| 359 |
|
|
$ (uVel(i, j, 1,bi,bj)-uVel(i, j, k,bi,bj)) + |
| 360 |
|
|
$ (uVel(ip1,j, 1,bi,bj)-uVel(ip1,j, k,bi,bj)) * |
| 361 |
|
|
$ (uVel(ip1,j, 1,bi,bj)-uVel(ip1,j, k,bi,bj)) + |
| 362 |
|
|
$ (vVel(i, j, 1,bi,bj)-vVel(i, j, k,bi,bj)) * |
| 363 |
|
|
$ (vVel(i, j, 1,bi,bj)-vVel(i, j, k,bi,bj)) + |
| 364 |
|
|
$ (vVel(i, jp1,1,bi,bj)-vVel(i, jp1,k,bi,bj)) * |
| 365 |
|
|
$ (vVel(i, jp1,1,bi,bj)-vVel(i, jp1,k,bi,bj)) ) |
| 366 |
|
|
#ifdef KPP_SMOOTH_DVSQ |
| 367 |
|
|
dVsq(i,j,k) = p5 * dVsq(i,j,k) + p125 * ( |
| 368 |
|
|
$ (uVel(i, jm1,1,bi,bj)-uVel(i, jm1,k,bi,bj)) * |
| 369 |
|
|
$ (uVel(i, jm1,1,bi,bj)-uVel(i, jm1,k,bi,bj)) + |
| 370 |
|
|
$ (uVel(ip1,jm1,1,bi,bj)-uVel(ip1,jm1,k,bi,bj)) * |
| 371 |
|
|
$ (uVel(ip1,jm1,1,bi,bj)-uVel(ip1,jm1,k,bi,bj)) + |
| 372 |
|
|
$ (uVel(i, jp1,1,bi,bj)-uVel(i, jp1,k,bi,bj)) * |
| 373 |
|
|
$ (uVel(i, jp1,1,bi,bj)-uVel(i, jp1,k,bi,bj)) + |
| 374 |
|
|
$ (uVel(ip1,jp1,1,bi,bj)-uVel(ip1,jp1,k,bi,bj)) * |
| 375 |
|
|
$ (uVel(ip1,jp1,1,bi,bj)-uVel(ip1,jp1,k,bi,bj)) + |
| 376 |
|
|
$ (vVel(im1,j, 1,bi,bj)-vVel(im1,j, k,bi,bj)) * |
| 377 |
|
|
$ (vVel(im1,j, 1,bi,bj)-vVel(im1,j, k,bi,bj)) + |
| 378 |
|
|
$ (vVel(im1,jp1,1,bi,bj)-vVel(im1,jp1,k,bi,bj)) * |
| 379 |
|
|
$ (vVel(im1,jp1,1,bi,bj)-vVel(im1,jp1,k,bi,bj)) + |
| 380 |
|
|
$ (vVel(ip1,j, 1,bi,bj)-vVel(ip1,j, k,bi,bj)) * |
| 381 |
|
|
$ (vVel(ip1,j, 1,bi,bj)-vVel(ip1,j, k,bi,bj)) + |
| 382 |
|
|
$ (vVel(ip1,jp1,1,bi,bj)-vVel(ip1,jp1,k,bi,bj)) * |
| 383 |
|
|
$ (vVel(ip1,jp1,1,bi,bj)-vVel(ip1,jp1,k,bi,bj)) ) |
| 384 |
|
|
#endif /* KPP_SMOOTH_DVSQ */ |
| 385 |
|
|
ENDDO |
| 386 |
|
|
ENDDO |
| 387 |
|
|
ENDDO |
| 388 |
|
|
|
| 389 |
|
|
#endif /* KPP_ESTIMATE_UREF */ |
| 390 |
|
|
|
| 391 |
|
|
RETURN |
| 392 |
|
|
END |
| 393 |
|
|
|
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