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C $Header: /escher1/cvs/master/mitgcmuv/pkg/kpp/kpp_routines.F,v 1.21 2000/11/01 20:11:05 dimitri Exp $ |
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|
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#include "KPP_OPTIONS.h" |
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|
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C-- File kpp_routines.F: subroutines needed to implement |
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C-- KPP vertical mixing scheme |
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C-- Contents |
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C-- o KPPMIX - Main driver and interface routine. |
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C-- o BLDEPTH - Determine oceanic planetary boundary layer depth. |
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C-- o WSCALE - Compute turbulent velocity scales. |
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C-- o RI_IWMIX - Compute interior viscosity diffusivity coefficients. |
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C-- o Z121 - Apply 121 vertical smoothing. |
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C-- o KPP_SMOOTH_HORIZ - Apply horizontal smoothing to KPP array. |
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C-- o SMOOTH_HORIZ - Apply horizontal smoothing to global array. |
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C-- o BLMIX - Boundary layer mixing coefficients. |
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C-- o ENHANCE - Enhance diffusivity at boundary layer interface. |
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C-- o STATEKPP - Compute buoyancy-related input arrays. |
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|
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c*********************************************************************** |
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|
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SUBROUTINE KPPMIX ( |
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I mytime, mythid |
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I , kmtj, shsq, dvsq, ustar |
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I , bo, bosol, dbloc, Ritop, coriol |
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I , ikey |
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O , diffus |
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U , ghat |
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O , hbl ) |
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|
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c----------------------------------------------------------------------- |
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c |
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c Main driver subroutine for kpp vertical mixing scheme and |
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c interface to greater ocean model |
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c |
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c written by: bill large, june 6, 1994 |
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c modified by: jan morzel, june 30, 1994 |
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c bill large, august 11, 1994 |
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c bill large, january 25, 1995 : "dVsq" and 1d code |
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c detlef stammer, august 1997 : for use with MIT GCM Classic |
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c d. menemenlis, june 1998 : for use with MIT GCM UV |
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c |
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c----------------------------------------------------------------------- |
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|
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IMPLICIT NONE |
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|
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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 "DYNVARS.h" |
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#include "FFIELDS.h" |
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#include "KPP_PARAMS.h" |
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|
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c input |
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c myTime - current time in simulation |
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c myThid - thread number for this instance of the routine |
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c kmtj (imt) - number of vertical layers on this row |
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c shsq (imt,Nr) - (local velocity shear)^2 ((m/s)^2) |
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c dvsq (imt,Nr) - (velocity shear re sfc)^2 ((m/s)^2) |
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c ustar (imt) - surface friction velocity (m/s) |
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c bo (imt) - surface turbulent buoy. forcing (m^2/s^3) |
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c bosol (imt) - radiative buoyancy forcing (m^2/s^3) |
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c dbloc (imt,Nr) - local delta buoyancy across interfaces (m/s^2) |
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c dblocSm(imt,Nr) - horizontally smoothed dbloc (m/s^2) |
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c stored in ghat to save space |
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c Ritop (imt,Nr) - numerator of bulk Richardson Number |
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c (zref-z) * delta buoyancy w.r.t. surface ((m/s)^2) |
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c coriol (imt) - Coriolis parameter (1/s) |
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c note: there is a conversion from 2-D to 1-D for input output variables, |
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c e.g., hbl(sNx,sNy) -> hbl(imt), |
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c where hbl(i,j) -> hbl((j-1)*sNx+i) |
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|
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_RL mytime |
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integer mythid |
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integer kmtj (imt ) |
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_KPP_RL shsq (imt,Nr) |
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_KPP_RL dvsq (imt,Nr) |
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_KPP_RL ustar (imt ) |
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_KPP_RL bo (imt ) |
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_KPP_RL bosol (imt ) |
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_KPP_RL dbloc (imt,Nr) |
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_KPP_RL Ritop (imt,Nr) |
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_KPP_RL coriol(imt ) |
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|
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integer ikey |
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|
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c output |
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c diffus (imt,1) - vertical viscosity coefficient (m^2/s) |
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c diffus (imt,2) - vertical scalar diffusivity (m^2/s) |
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c diffus (imt,3) - vertical temperature diffusivity (m^2/s) |
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c ghat (imt) - nonlocal transport coefficient (s/m^2) |
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c hbl (imt) - mixing layer depth (m) |
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|
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_KPP_RL diffus(imt,0:Nrp1,mdiff) |
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_KPP_RL ghat (imt,Nr) |
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_KPP_RL hbl (imt) |
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|
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#ifdef ALLOW_KPP |
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|
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c local |
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c kbl (imt ) - index of first grid level below hbl |
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c bfsfc (imt ) - surface buoyancy forcing (m^2/s^3) |
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c casea (imt ) - 1 in case A; 0 in case B |
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c stable (imt ) - 1 in stable forcing; 0 if unstable |
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c dkm1 (imt, mdiff) - boundary layer diffusivity at kbl-1 level |
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c blmc (imt,Nr,mdiff) - boundary layer mixing coefficients |
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c sigma (imt ) - normalized depth (d / hbl) |
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c Rib (imt,Nr ) - bulk Richardson number |
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|
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integer kbl (imt ) |
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_KPP_RL bfsfc (imt ) |
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_KPP_RL casea (imt ) |
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_KPP_RL stable(imt ) |
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_KPP_RL dkm1 (imt, mdiff) |
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_KPP_RL blmc (imt,Nr,mdiff) |
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_KPP_RL sigma (imt ) |
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_KPP_RL Rib (imt,Nr ) |
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|
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integer i, k, md |
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|
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c----------------------------------------------------------------------- |
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c compute interior mixing coefficients everywhere, due to constant |
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c internal wave activity, static instability, and local shear |
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c instability. |
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c (ghat is temporary storage for horizontally smoothed dbloc) |
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c----------------------------------------------------------------------- |
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|
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CADJ STORE ghat = comlev1_kpp, key = ikey |
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|
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call Ri_iwmix ( |
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I kmtj, shsq, dbloc, ghat |
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I , ikey |
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O , diffus ) |
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|
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c----------------------------------------------------------------------- |
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c set seafloor values to zero and fill extra "Nrp1" coefficients |
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c for blmix |
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c----------------------------------------------------------------------- |
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|
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do md = 1, mdiff |
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do i = 1,imt |
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do k=kmtj(i),Nrp1 |
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diffus(i,k,md) = 0.0 |
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end do |
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end do |
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end do |
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|
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c----------------------------------------------------------------------- |
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c compute boundary layer mixing coefficients: |
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c |
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c diagnose the new boundary layer depth |
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c----------------------------------------------------------------------- |
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|
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call bldepth ( |
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I mytime, mythid |
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I , kmtj |
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I , dvsq, dbloc, Ritop, ustar, bo, bosol, coriol |
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I , ikey |
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O , hbl, bfsfc, stable, casea, kbl, Rib, sigma |
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& ) |
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|
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CADJ STORE hbl,bfsfc,stable,casea,kbl = comlev1_kpp, key = ikey |
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|
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c----------------------------------------------------------------------- |
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c compute boundary layer diffusivities |
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c----------------------------------------------------------------------- |
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|
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call blmix ( |
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I ustar, bfsfc, hbl, stable, casea, diffus, kbl |
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O , dkm1, blmc, ghat, sigma, ikey |
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& ) |
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|
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CADJ STORE dkm1,blmc,ghat = comlev1_kpp, key = ikey |
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|
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c----------------------------------------------------------------------- |
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c enhance diffusivity at interface kbl - 1 |
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c----------------------------------------------------------------------- |
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|
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call enhance ( |
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I dkm1, hbl, kbl, diffus, casea |
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U , ghat |
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O , blmc ) |
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|
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c----------------------------------------------------------------------- |
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c combine interior and boundary layer coefficients and nonlocal term |
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c----------------------------------------------------------------------- |
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|
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do k = 1, Nr |
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do i = 1, imt |
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if (k .lt. kbl(i)) then |
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do md = 1, mdiff |
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diffus(i,k,md) = blmc(i,k,md) |
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end do |
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else |
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ghat(i,k) = 0. |
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endif |
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end do |
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end do |
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|
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#endif /* ALLOW_KPP */ |
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|
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return |
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end |
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|
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c************************************************************************* |
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|
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subroutine bldepth ( |
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I mytime, mythid |
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I , kmtj |
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I , dvsq, dbloc, Ritop, ustar, bo, bosol, coriol |
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I , ikey |
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O , hbl, bfsfc, stable, casea, kbl, Rib, sigma |
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& ) |
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|
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c the oceanic planetary boundary layer depth, hbl, is determined as |
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c the shallowest depth where the bulk Richardson number is |
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c equal to the critical value, Ricr. |
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c |
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c bulk Richardson numbers are evaluated by computing velocity and |
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c buoyancy differences between values at zgrid(kl) < 0 and surface |
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c reference values. |
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c in this configuration, the reference values are equal to the |
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c values in the surface layer. |
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c when using a very fine vertical grid, these values should be |
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c computed as the vertical average of velocity and buoyancy from |
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c the surface down to epsilon*zgrid(kl). |
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c |
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c when the bulk Richardson number at k exceeds Ricr, hbl is |
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c linearly interpolated between grid levels zgrid(k) and zgrid(k-1). |
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c |
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c The water column and the surface forcing are diagnosed for |
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c stable/ustable forcing conditions, and where hbl is relative |
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c to grid points (caseA), so that conditional branches can be |
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c avoided in later subroutines. |
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c |
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IMPLICIT NONE |
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|
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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 "KPP_PARAMS.h" |
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#include "FFIELDS.h" |
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|
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c input |
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c------ |
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c myTime : current time in simulation |
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c myThid : thread number for this instance of the routine |
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c kmtj : number of vertical layers |
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c dvsq : (velocity shear re sfc)^2 ((m/s)^2) |
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c dbloc : local delta buoyancy across interfaces (m/s^2) |
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c Ritop : numerator of bulk Richardson Number |
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c =(z-zref)*dbsfc, where dbsfc=delta |
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c buoyancy with respect to surface ((m/s)^2) |
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c ustar : surface friction velocity (m/s) |
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c bo : surface turbulent buoyancy forcing (m^2/s^3) |
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c bosol : radiative buoyancy forcing (m^2/s^3) |
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c coriol : Coriolis parameter (1/s) |
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_RL mytime |
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integer mythid |
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integer kmtj(imt) |
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_KPP_RL dvsq (imt,Nr) |
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_KPP_RL dbloc (imt,Nr) |
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_KPP_RL Ritop (imt,Nr) |
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_KPP_RL ustar (imt) |
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_KPP_RL bo (imt) |
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_KPP_RL bosol (imt) |
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_KPP_RL coriol(imt) |
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integer ikey |
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|
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c output |
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c-------- |
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c hbl : boundary layer depth (m) |
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c bfsfc : Bo+radiation absorbed to d=hbf*hbl (m^2/s^3) |
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c stable : =1 in stable forcing; =0 unstable |
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c casea : =1 in case A, =0 in case B |
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c kbl : -1 of first grid level below hbl |
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c Rib : Bulk Richardson number |
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c sigma : normalized depth (d/hbl) |
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_KPP_RL hbl (imt) |
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_KPP_RL bfsfc (imt) |
280 |
_KPP_RL stable(imt) |
281 |
_KPP_RL casea (imt) |
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integer kbl (imt) |
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_KPP_RL Rib (imt,Nr) |
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_KPP_RL sigma (imt) |
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|
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#ifdef ALLOW_KPP |
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|
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c local |
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c------- |
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c wm, ws : turbulent velocity scales (m/s) |
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_KPP_RL wm(imt), ws(imt) |
292 |
_RL worka(imt) |
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|
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_KPP_RL bvsq, vtsq, hekman, hmonob, hlimit, tempVar1, tempVar2 |
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integer i, kl |
296 |
|
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_KPP_RL p5 , eins |
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parameter ( p5=0.5, eins=1.0 ) |
299 |
_RL minusone |
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parameter ( minusone=-1.0 ) |
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|
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c find bulk Richardson number at every grid level until > Ricr |
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c |
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c note: the reference depth is -epsilon/2.*zgrid(k), but the reference |
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c u,v,t,s values are simply the surface layer values, |
306 |
c and not the averaged values from 0 to 2*ref.depth, |
307 |
c which is necessary for very fine grids(top layer < 2m thickness) |
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c note: max values when Ricr never satisfied are |
309 |
c kbl(i)=kmtj(i) and hbl(i)=-zgrid(kmtj(i)) |
310 |
|
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c initialize hbl and kbl to bottomed out values |
312 |
|
313 |
do i = 1, imt |
314 |
Rib(i,1) = 0.0 |
315 |
kbl(i) = max(kmtj(i),1) |
316 |
hbl(i) = -zgrid(kbl(i)) |
317 |
end do |
318 |
|
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do kl = 2, Nr |
320 |
|
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c compute bfsfc = sw fraction at hbf * zgrid |
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|
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do i = 1, imt |
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worka(i) = zgrid(kl) |
325 |
end do |
326 |
call SWFRAC( |
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I imt, hbf, |
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I mytime, mythid, |
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U worka ) |
330 |
|
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do i = 1, imt |
332 |
|
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c use caseA as temporary array |
334 |
|
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casea(i) = -zgrid(kl) |
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|
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c compute bfsfc= Bo + radiative contribution down to hbf * hbl |
338 |
|
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bfsfc(i) = bo(i) + bosol(i)*(1. - worka(i)) |
340 |
stable(i) = p5 + sign(p5,bfsfc(i)) |
341 |
sigma(i) = stable(i) + (1. - stable(i)) * epsilon |
342 |
|
343 |
end do |
344 |
|
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c----------------------------------------------------------------------- |
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c compute velocity scales at sigma, for hbl= caseA = -zgrid(kl) |
347 |
c----------------------------------------------------------------------- |
348 |
|
349 |
call wscale ( |
350 |
I sigma, casea, ustar, bfsfc, |
351 |
O wm, ws ) |
352 |
|
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do i = 1, imt |
354 |
|
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c----------------------------------------------------------------------- |
356 |
c compute the turbulent shear contribution to Rib |
357 |
c----------------------------------------------------------------------- |
358 |
|
359 |
bvsq = p5 * |
360 |
1 ( dbloc(i,kl-1) / (zgrid(kl-1)-zgrid(kl ))+ |
361 |
2 dbloc(i,kl ) / (zgrid(kl )-zgrid(kl+1))) |
362 |
|
363 |
if (bvsq .eq. 0.) then |
364 |
vtsq = 0.0 |
365 |
else |
366 |
vtsq = -zgrid(kl) * ws(i) * sqrt(abs(bvsq)) * Vtc |
367 |
endif |
368 |
|
369 |
c compute bulk Richardson number at new level |
370 |
c note: Ritop needs to be zero on land and ocean bottom |
371 |
c points so that the following if statement gets triggered |
372 |
c correctly; otherwise, hbl might get set to (big) negative |
373 |
c values, that might exceed the limit for the "exp" function |
374 |
c in "SWFRAC" |
375 |
|
376 |
c |
377 |
c rg: assignment to double precision variable to avoid overflow |
378 |
c ph: test for zero nominator |
379 |
c |
380 |
|
381 |
tempVar1 = dvsq(i,kl) + vtsq |
382 |
tempVar2 = max(tempVar1, phepsi) |
383 |
Rib(i,kl) = Ritop(i,kl) / tempVar2 |
384 |
|
385 |
end do |
386 |
end do |
387 |
|
388 |
do kl = 2, Nr |
389 |
do i = 1, imt |
390 |
if (kbl(i).eq.kmtj(i) .and. Rib(i,kl).gt.Ricr) kbl(i) = kl |
391 |
end do |
392 |
end do |
393 |
|
394 |
CADJ store kbl = comlev1_kpp |
395 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
396 |
|
397 |
do i = 1, imt |
398 |
kl = kbl(i) |
399 |
c linearly interpolate to find hbl where Rib = Ricr |
400 |
if (kl.gt.1 .and. kl.lt.kmtj(i)) then |
401 |
tempVar1 = (Rib(i,kl)-Rib(i,kl-1)) |
402 |
hbl(i) = -zgrid(kl-1) + (zgrid(kl-1)-zgrid(kl)) * |
403 |
1 (Ricr - Rib(i,kl-1)) / tempVar1 |
404 |
endif |
405 |
end do |
406 |
|
407 |
CADJ store hbl = comlev1_kpp |
408 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
409 |
|
410 |
c----------------------------------------------------------------------- |
411 |
c find stability and buoyancy forcing for boundary layer |
412 |
c----------------------------------------------------------------------- |
413 |
|
414 |
do i = 1, imt |
415 |
worka(i) = hbl(i) |
416 |
end do |
417 |
call SWFRAC( |
418 |
I imt, minusone, |
419 |
I mytime, mythid, |
420 |
U worka ) |
421 |
|
422 |
do i = 1, imt |
423 |
bfsfc(i) = bo(i) + bosol(i) * (1. - worka(i)) |
424 |
end do |
425 |
CADJ store bfsfc = comlev1_kpp |
426 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
427 |
|
428 |
c-- ensure bfsfc is never 0 |
429 |
do i = 1, imt |
430 |
stable(i) = p5 + sign( p5, bfsfc(i) ) |
431 |
bfsfc(i) = sign(eins,bfsfc(i))*max(phepsi,abs(bfsfc(i))) |
432 |
end do |
433 |
|
434 |
CADJ store bfsfc = comlev1_kpp |
435 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
436 |
|
437 |
c----------------------------------------------------------------------- |
438 |
c check hbl limits for hekman or hmonob |
439 |
c ph: test for zero nominator |
440 |
c----------------------------------------------------------------------- |
441 |
|
442 |
do i = 1, imt |
443 |
if (bfsfc(i) .gt. 0.0) then |
444 |
hekman = cekman * ustar(i) / max(abs(Coriol(i)),phepsi) |
445 |
hmonob = cmonob * ustar(i)*ustar(i)*ustar(i) |
446 |
& / vonk / bfsfc(i) |
447 |
hlimit = stable(i) * min(hekman,hmonob) |
448 |
& + (stable(i)-1.) * zgrid(Nr) |
449 |
hbl(i) = min(hbl(i),hlimit) |
450 |
end if |
451 |
end do |
452 |
CADJ store hbl = comlev1_kpp |
453 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
454 |
|
455 |
do i = 1, imt |
456 |
hbl(i) = max(hbl(i),minKPPhbl) |
457 |
kbl(i) = kmtj(i) |
458 |
end do |
459 |
|
460 |
CADJ store hbl = comlev1_kpp |
461 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
462 |
|
463 |
c----------------------------------------------------------------------- |
464 |
c find new kbl |
465 |
c----------------------------------------------------------------------- |
466 |
|
467 |
do kl = 2, Nr |
468 |
do i = 1, imt |
469 |
if ( kbl(i).eq.kmtj(i) .and. (-zgrid(kl)).gt.hbl(i) ) then |
470 |
kbl(i) = kl |
471 |
endif |
472 |
end do |
473 |
end do |
474 |
|
475 |
c----------------------------------------------------------------------- |
476 |
c find stability and buoyancy forcing for final hbl values |
477 |
c----------------------------------------------------------------------- |
478 |
|
479 |
do i = 1, imt |
480 |
worka(i) = hbl(i) |
481 |
end do |
482 |
call SWFRAC( |
483 |
I imt, minusone, |
484 |
I mytime, mythid, |
485 |
U worka ) |
486 |
|
487 |
do i = 1, imt |
488 |
bfsfc(i) = bo(i) + bosol(i) * (1. - worka(i)) |
489 |
end do |
490 |
CADJ store bfsfc = comlev1_kpp |
491 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy) /) |
492 |
|
493 |
c-- ensures bfsfc is never 0 |
494 |
do i = 1, imt |
495 |
stable(i) = p5 + sign( p5, bfsfc(i) ) |
496 |
bfsfc(i) = sign(eins,bfsfc(i))*max(phepsi,abs(bfsfc(i))) |
497 |
end do |
498 |
|
499 |
c----------------------------------------------------------------------- |
500 |
c determine caseA and caseB |
501 |
c----------------------------------------------------------------------- |
502 |
|
503 |
do i = 1, imt |
504 |
casea(i) = p5 + |
505 |
1 sign(p5, -zgrid(kbl(i)) - p5*hwide(kbl(i)) - hbl(i)) |
506 |
end do |
507 |
|
508 |
#endif /* ALLOW_KPP */ |
509 |
|
510 |
return |
511 |
end |
512 |
|
513 |
c************************************************************************* |
514 |
|
515 |
subroutine wscale ( |
516 |
I sigma, hbl, ustar, bfsfc, |
517 |
O wm, ws ) |
518 |
|
519 |
c compute turbulent velocity scales. |
520 |
c use a 2D-lookup table for wm and ws as functions of ustar and |
521 |
c zetahat (=vonk*sigma*hbl*bfsfc). |
522 |
c |
523 |
c note: the lookup table is only used for unstable conditions |
524 |
c (zehat.le.0), in the stable domain wm (=ws) gets computed |
525 |
c directly. |
526 |
c |
527 |
IMPLICIT NONE |
528 |
|
529 |
#include "SIZE.h" |
530 |
#include "KPP_PARAMS.h" |
531 |
|
532 |
c input |
533 |
c------ |
534 |
c sigma : normalized depth (d/hbl) |
535 |
c hbl : boundary layer depth (m) |
536 |
c ustar : surface friction velocity (m/s) |
537 |
c bfsfc : total surface buoyancy flux (m^2/s^3) |
538 |
_KPP_RL sigma(imt) |
539 |
_KPP_RL hbl (imt) |
540 |
_KPP_RL ustar(imt) |
541 |
_KPP_RL bfsfc(imt) |
542 |
|
543 |
c output |
544 |
c-------- |
545 |
c wm, ws : turbulent velocity scales at sigma |
546 |
_KPP_RL wm(imt), ws(imt) |
547 |
|
548 |
#ifdef ALLOW_KPP |
549 |
|
550 |
c local |
551 |
c------ |
552 |
c zehat : = zeta * ustar**3 |
553 |
_KPP_RL zehat |
554 |
|
555 |
integer iz, izp1, ju, i, jup1 |
556 |
_KPP_RL udiff, zdiff, zfrac, ufrac, fzfrac, wam |
557 |
_KPP_RL wbm, was, wbs, u3, tempVar |
558 |
|
559 |
c----------------------------------------------------------------------- |
560 |
c use lookup table for zehat < zmax only; otherwise use |
561 |
c stable formulae |
562 |
c----------------------------------------------------------------------- |
563 |
|
564 |
do i = 1, imt |
565 |
zehat = vonk*sigma(i)*hbl(i)*bfsfc(i) |
566 |
|
567 |
if (zehat .le. zmax) then |
568 |
|
569 |
zdiff = zehat - zmin |
570 |
iz = int( zdiff / deltaz ) |
571 |
iz = min( iz, nni ) |
572 |
iz = max( iz, 0 ) |
573 |
izp1 = iz + 1 |
574 |
|
575 |
udiff = ustar(i) - umin |
576 |
ju = int( udiff / deltau ) |
577 |
ju = min( ju, nnj ) |
578 |
ju = max( ju, 0 ) |
579 |
jup1 = ju + 1 |
580 |
|
581 |
zfrac = zdiff / deltaz - float(iz) |
582 |
ufrac = udiff / deltau - float(ju) |
583 |
|
584 |
fzfrac= 1. - zfrac |
585 |
wam = fzfrac * wmt(iz,jup1) + zfrac * wmt(izp1,jup1) |
586 |
wbm = fzfrac * wmt(iz,ju ) + zfrac * wmt(izp1,ju ) |
587 |
wm(i) = (1.-ufrac) * wbm + ufrac * wam |
588 |
|
589 |
was = fzfrac * wst(iz,jup1) + zfrac * wst(izp1,jup1) |
590 |
wbs = fzfrac * wst(iz,ju ) + zfrac * wst(izp1,ju ) |
591 |
ws(i) = (1.-ufrac) * wbs + ufrac * was |
592 |
|
593 |
else |
594 |
|
595 |
u3 = ustar(i) * ustar(i) * ustar(i) |
596 |
tempVar = u3 + conc1 * zehat |
597 |
wm(i) = vonk * ustar(i) * u3 / tempVar |
598 |
ws(i) = wm(i) |
599 |
|
600 |
endif |
601 |
|
602 |
end do |
603 |
|
604 |
#endif /* ALLOW_KPP */ |
605 |
|
606 |
return |
607 |
end |
608 |
|
609 |
c************************************************************************* |
610 |
|
611 |
subroutine Ri_iwmix ( |
612 |
I kmtj, shsq, dbloc, dblocSm |
613 |
I , ikey |
614 |
O , diffus ) |
615 |
|
616 |
c compute interior viscosity diffusivity coefficients due |
617 |
c to shear instability (dependent on a local Richardson number), |
618 |
c to background internal wave activity, and |
619 |
c to static instability (local Richardson number < 0). |
620 |
|
621 |
IMPLICIT NONE |
622 |
|
623 |
#include "SIZE.h" |
624 |
#include "EEPARAMS.h" |
625 |
#include "PARAMS.h" |
626 |
#include "KPP_PARAMS.h" |
627 |
|
628 |
c input |
629 |
c kmtj (imt) number of vertical layers on this row |
630 |
c shsq (imt,Nr) (local velocity shear)^2 ((m/s)^2) |
631 |
c dbloc (imt,Nr) local delta buoyancy (m/s^2) |
632 |
c dblocSm(imt,Nr) horizontally smoothed dbloc (m/s^2) |
633 |
integer kmtj (imt) |
634 |
_KPP_RL shsq (imt,Nr) |
635 |
_KPP_RL dbloc (imt,Nr) |
636 |
_KPP_RL dblocSm(imt,Nr) |
637 |
integer ikey |
638 |
|
639 |
c output |
640 |
c diffus(imt,0:Nrp1,1) vertical viscosivity coefficient (m^2/s) |
641 |
c diffus(imt,0:Nrp1,2) vertical scalar diffusivity (m^2/s) |
642 |
c diffus(imt,0:Nrp1,3) vertical temperature diffusivity (m^2/s) |
643 |
_KPP_RL diffus(imt,0:Nrp1,3) |
644 |
|
645 |
#ifdef ALLOW_KPP |
646 |
|
647 |
c local variables |
648 |
c Rig local Richardson number |
649 |
c fRi, fcon function of Rig |
650 |
_KPP_RL Rig |
651 |
_KPP_RL fRi, fcon |
652 |
_KPP_RL ratio |
653 |
integer i, ki, mr |
654 |
_KPP_RL c1, c0 |
655 |
|
656 |
c constants |
657 |
c1 = 1.0 |
658 |
c0 = 0.0 |
659 |
|
660 |
c----------------------------------------------------------------------- |
661 |
c compute interior gradient Ri at all interfaces ki=1,Nr, (not surface) |
662 |
c use diffus(*,*,1) as temporary storage of Ri to be smoothed |
663 |
c use diffus(*,*,2) as temporary storage for Brunt-Vaisala squared |
664 |
c set values at bottom and below to nearest value above bottom |
665 |
|
666 |
do ki = 1, Nr |
667 |
do i = 1, imt |
668 |
if (kmtj(i) .EQ. 0 ) then |
669 |
diffus(i,ki,1) = 0. |
670 |
diffus(i,ki,2) = 0. |
671 |
elseif (ki .GE. kmtj(i)) then |
672 |
diffus(i,ki,1) = diffus(i,ki-1,1) |
673 |
diffus(i,ki,2) = diffus(i,ki-1,2) |
674 |
else |
675 |
diffus(i,ki,1) = dblocSm(i,ki) * (zgrid(ki)-zgrid(ki+1)) |
676 |
& / max( Shsq(i,ki), phepsi ) |
677 |
diffus(i,ki,2) = dbloc(i,ki) / (zgrid(ki)-zgrid(ki+1)) |
678 |
endif |
679 |
end do |
680 |
end do |
681 |
|
682 |
c----------------------------------------------------------------------- |
683 |
c vertically smooth Ri |
684 |
|
685 |
do mr = 1, num_v_smooth_Ri |
686 |
|
687 |
CADJ store diffus(:,:,1) = comlev1_kpp_sm |
688 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy),Nr+2 /) |
689 |
|
690 |
call z121 ( |
691 |
U diffus(1,0,1)) |
692 |
end do |
693 |
|
694 |
CADJ store diffus = comlev1_kpp |
695 |
CADJ & , key = ikey, shape = (/ (sNx+2*OLx)*(sNy+2*OLy),Nr+2,3 /) |
696 |
|
697 |
c----------------------------------------------------------------------- |
698 |
c after smoothing loop |
699 |
|
700 |
do ki = 1, Nr |
701 |
do i = 1, imt |
702 |
|
703 |
c evaluate f of Brunt-Vaisala squared for convection, store in fcon |
704 |
|
705 |
Rig = max ( diffus(i,ki,2) , BVSQcon ) |
706 |
ratio = min ( (BVSQcon - Rig) / BVSQcon, c1 ) |
707 |
fcon = c1 - ratio * ratio |
708 |
fcon = fcon * fcon * fcon |
709 |
|
710 |
c evaluate f of smooth Ri for shear instability, store in fRi |
711 |
|
712 |
Rig = max ( diffus(i,ki,1), c0 ) |
713 |
ratio = min ( Rig / Riinfty , c1 ) |
714 |
fRi = c1 - ratio * ratio |
715 |
fRi = fRi * fRi * fRi |
716 |
|
717 |
c ---------------------------------------------------------------------- |
718 |
c evaluate diffusivities and viscosity |
719 |
c mixing due to internal waves, and shear and static instability |
720 |
|
721 |
diffus(i,ki,1) = viscAr + fcon * difmcon + fRi * difm0 |
722 |
diffus(i,ki,2) = diffKrS + fcon * difscon + fRi * difs0 |
723 |
diffus(i,ki,3) = diffKrT + fcon * difscon + fRi * difs0 |
724 |
|
725 |
end do |
726 |
end do |
727 |
|
728 |
c ------------------------------------------------------------------------ |
729 |
c set surface values to 0.0 |
730 |
|
731 |
do i = 1, imt |
732 |
diffus(i,0,1) = c0 |
733 |
diffus(i,0,2) = c0 |
734 |
diffus(i,0,3) = c0 |
735 |
end do |
736 |
|
737 |
#endif /* ALLOW_KPP */ |
738 |
|
739 |
return |
740 |
end |
741 |
|
742 |
c************************************************************************* |
743 |
|
744 |
subroutine z121 ( |
745 |
U v ) |
746 |
|
747 |
c Apply 121 smoothing in k to 2-d array V(i,k=1,Nr) |
748 |
c top (0) value is used as a dummy |
749 |
c bottom (Nrp1) value is set to input value from above. |
750 |
|
751 |
c Note that it is important to exclude from the smoothing any points |
752 |
c that are outside the range of the K(Ri) scheme, ie. >0.8, or <0.0. |
753 |
c Otherwise, there is interference with other physics, especially |
754 |
c penetrative convection. |
755 |
|
756 |
IMPLICIT NONE |
757 |
#include "SIZE.h" |
758 |
#include "KPP_PARAMS.h" |
759 |
|
760 |
c input/output |
761 |
c------------- |
762 |
c v : 2-D array to be smoothed in Nrp1 direction |
763 |
_KPP_RL v(imt,0:Nrp1) |
764 |
|
765 |
#ifdef ALLOW_KPP |
766 |
|
767 |
c local |
768 |
_KPP_RL zwork, zflag |
769 |
_KPP_RL KRi_range(1:Nrp1) |
770 |
integer i, k, km1, kp1 |
771 |
|
772 |
_KPP_RL p0 , p25 , p5 , p2 |
773 |
parameter ( p0 = 0.0, p25 = 0.25, p5 = 0.5, p2 = 2.0 ) |
774 |
|
775 |
KRi_range(Nrp1) = p0 |
776 |
|
777 |
#ifdef ALLOW_AUTODIFF_TAMC |
778 |
C-- dummy assignment to end declaration part for TAMC |
779 |
i = 0 |
780 |
|
781 |
C-- HPF directive to help TAMC |
782 |
CHPF$ INDEPENDENT |
783 |
CADJ INIT z121tape = common, Nr |
784 |
#endif /* ALLOW_AUTODIFF_TAMC */ |
785 |
|
786 |
do i = 1, imt |
787 |
|
788 |
k = 1 |
789 |
CADJ STORE v(i,k) = z121tape |
790 |
v(i,Nrp1) = v(i,Nr) |
791 |
|
792 |
do k = 1, Nr |
793 |
KRi_range(k) = p5 + SIGN(p5,v(i,k)) |
794 |
KRi_range(k) = KRi_range(k) * |
795 |
& ( p5 + SIGN(p5,(Riinfty-v(i,k))) ) |
796 |
end do |
797 |
|
798 |
zwork = KRi_range(1) * v(i,1) |
799 |
v(i,1) = p2 * v(i,1) + |
800 |
& KRi_range(1) * KRi_range(2) * v(i,2) |
801 |
zflag = p2 + KRi_range(1) * KRi_range(2) |
802 |
v(i,1) = v(i,1) / zflag |
803 |
|
804 |
do k = 2, Nr |
805 |
CADJ STORE v(i,k), zwork = z121tape |
806 |
km1 = k - 1 |
807 |
kp1 = k + 1 |
808 |
zflag = v(i,k) |
809 |
v(i,k) = p2 * v(i,k) + |
810 |
& KRi_range(k) * KRi_range(kp1) * v(i,kp1) + |
811 |
& KRi_range(k) * zwork |
812 |
zwork = KRi_range(k) * zflag |
813 |
zflag = p2 + KRi_range(k)*(KRi_range(kp1)+KRi_range(km1)) |
814 |
v(i,k) = v(i,k) / zflag |
815 |
end do |
816 |
|
817 |
end do |
818 |
|
819 |
#endif /* ALLOW_KPP */ |
820 |
|
821 |
return |
822 |
end |
823 |
|
824 |
c************************************************************************* |
825 |
|
826 |
subroutine kpp_smooth_horiz ( |
827 |
I k, bi, bj, |
828 |
U fld ) |
829 |
|
830 |
c Apply horizontal smoothing to KPP array |
831 |
|
832 |
IMPLICIT NONE |
833 |
#include "SIZE.h" |
834 |
#include "KPP_PARAMS.h" |
835 |
|
836 |
c input |
837 |
c bi, bj : array indices |
838 |
c k : vertical index used for masking |
839 |
integer k, bi, bj |
840 |
|
841 |
c input/output |
842 |
c fld : 2-D array to be smoothed |
843 |
_KPP_RL fld( ibot:itop, jbot:jtop ) |
844 |
|
845 |
#ifdef ALLOW_KPP |
846 |
|
847 |
c local |
848 |
integer i, j, im1, ip1, jm1, jp1 |
849 |
_KPP_RL tempVar |
850 |
_KPP_RL fld_tmp( ibot:itop, jbot:jtop ) |
851 |
|
852 |
integer imin , imax , jmin , jmax |
853 |
parameter( imin=ibot+1, imax=itop-1, jmin=jbot+1, jmax=jtop-1 ) |
854 |
|
855 |
_KPP_RL p0 , p5 , p25 , p125 , p0625 |
856 |
parameter( p0=0.0, p5=0.5, p25=0.25, p125=0.125, p0625=0.0625 ) |
857 |
|
858 |
DO j = jmin, jmax |
859 |
jm1 = j-1 |
860 |
jp1 = j+1 |
861 |
DO i = imin, imax |
862 |
im1 = i-1 |
863 |
ip1 = i+1 |
864 |
tempVar = |
865 |
& p25 * pMask(i ,j ,k,bi,bj) + |
866 |
& p125 * ( pMask(im1,j ,k,bi,bj) + |
867 |
& pMask(ip1,j ,k,bi,bj) + |
868 |
& pMask(i ,jm1,k,bi,bj) + |
869 |
& pMask(i ,jp1,k,bi,bj) ) + |
870 |
& p0625 * ( pMask(im1,jm1,k,bi,bj) + |
871 |
& pMask(im1,jp1,k,bi,bj) + |
872 |
& pMask(ip1,jm1,k,bi,bj) + |
873 |
& pMask(ip1,jp1,k,bi,bj) ) |
874 |
IF ( tempVar .GE. p25 ) THEN |
875 |
fld_tmp(i,j) = ( |
876 |
& p25 * fld(i ,j )*pMask(i ,j ,k,bi,bj) + |
877 |
& p125 *(fld(im1,j )*pMask(im1,j ,k,bi,bj) + |
878 |
& fld(ip1,j )*pMask(ip1,j ,k,bi,bj) + |
879 |
& fld(i ,jm1)*pMask(i ,jm1,k,bi,bj) + |
880 |
& fld(i ,jp1)*pMask(i ,jp1,k,bi,bj))+ |
881 |
& p0625*(fld(im1,jm1)*pMask(im1,jm1,k,bi,bj) + |
882 |
& fld(im1,jp1)*pMask(im1,jp1,k,bi,bj) + |
883 |
& fld(ip1,jm1)*pMask(ip1,jm1,k,bi,bj) + |
884 |
& fld(ip1,jp1)*pMask(ip1,jp1,k,bi,bj))) |
885 |
& / tempVar |
886 |
ELSE |
887 |
fld_tmp(i,j) = fld(i,j) |
888 |
ENDIF |
889 |
ENDDO |
890 |
ENDDO |
891 |
|
892 |
c transfer smoothed field to output array |
893 |
DO j = jmin, jmax |
894 |
DO i = imin, imax |
895 |
fld(i,j) = fld_tmp(i,j) |
896 |
ENDDO |
897 |
ENDDO |
898 |
|
899 |
#endif /* ALLOW_KPP */ |
900 |
|
901 |
return |
902 |
end |
903 |
|
904 |
c************************************************************************* |
905 |
|
906 |
subroutine smooth_horiz ( |
907 |
I k, bi, bj, |
908 |
U fld ) |
909 |
|
910 |
c Apply horizontal smoothing to global _RL 2-D array |
911 |
|
912 |
IMPLICIT NONE |
913 |
#include "SIZE.h" |
914 |
#include "KPP_PARAMS.h" |
915 |
|
916 |
c input |
917 |
c bi, bj : array indices |
918 |
c k : vertical index used for masking |
919 |
integer k, bi, bj |
920 |
|
921 |
c input/output |
922 |
c fld : 2-D array to be smoothed |
923 |
_RL fld( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
924 |
|
925 |
#ifdef ALLOW_KPP |
926 |
|
927 |
c local |
928 |
integer i, j, im1, ip1, jm1, jp1 |
929 |
_RL tempVar |
930 |
_RL fld_tmp( 1-OLx:sNx+OLx, 1-OLy:sNy+OLy ) |
931 |
|
932 |
integer imin , imax , jmin , jmax |
933 |
parameter(imin=2-OLx, imax=sNx+OLx-1, jmin=2-OLy, jmax=sNy+OLy-1) |
934 |
|
935 |
_RL p0 , p5 , p25 , p125 , p0625 |
936 |
parameter( p0=0.0, p5=0.5, p25=0.25, p125=0.125, p0625=0.0625 ) |
937 |
|
938 |
DO j = jmin, jmax |
939 |
jm1 = j-1 |
940 |
jp1 = j+1 |
941 |
DO i = imin, imax |
942 |
im1 = i-1 |
943 |
ip1 = i+1 |
944 |
tempVar = |
945 |
& p25 * pMask(i ,j ,k,bi,bj) + |
946 |
& p125 * ( pMask(im1,j ,k,bi,bj) + |
947 |
& pMask(ip1,j ,k,bi,bj) + |
948 |
& pMask(i ,jm1,k,bi,bj) + |
949 |
& pMask(i ,jp1,k,bi,bj) ) + |
950 |
& p0625 * ( pMask(im1,jm1,k,bi,bj) + |
951 |
& pMask(im1,jp1,k,bi,bj) + |
952 |
& pMask(ip1,jm1,k,bi,bj) + |
953 |
& pMask(ip1,jp1,k,bi,bj) ) |
954 |
IF ( tempVar .GE. p25 ) THEN |
955 |
fld_tmp(i,j) = ( |
956 |
& p25 * fld(i ,j )*pMask(i ,j ,k,bi,bj) + |
957 |
& p125 *(fld(im1,j )*pMask(im1,j ,k,bi,bj) + |
958 |
& fld(ip1,j )*pMask(ip1,j ,k,bi,bj) + |
959 |
& fld(i ,jm1)*pMask(i ,jm1,k,bi,bj) + |
960 |
& fld(i ,jp1)*pMask(i ,jp1,k,bi,bj))+ |
961 |
& p0625*(fld(im1,jm1)*pMask(im1,jm1,k,bi,bj) + |
962 |
& fld(im1,jp1)*pMask(im1,jp1,k,bi,bj) + |
963 |
& fld(ip1,jm1)*pMask(ip1,jm1,k,bi,bj) + |
964 |
& fld(ip1,jp1)*pMask(ip1,jp1,k,bi,bj))) |
965 |
& / tempVar |
966 |
ELSE |
967 |
fld_tmp(i,j) = fld(i,j) |
968 |
ENDIF |
969 |
ENDDO |
970 |
ENDDO |
971 |
|
972 |
c transfer smoothed field to output array |
973 |
DO j = jmin, jmax |
974 |
DO i = imin, imax |
975 |
fld(i,j) = fld_tmp(i,j) |
976 |
ENDDO |
977 |
ENDDO |
978 |
|
979 |
#endif /* ALLOW_KPP */ |
980 |
|
981 |
return |
982 |
end |
983 |
|
984 |
c************************************************************************* |
985 |
|
986 |
subroutine blmix ( |
987 |
I ustar, bfsfc, hbl, stable, casea, diffus, kbl |
988 |
O , dkm1, blmc, ghat, sigma, ikey |
989 |
& ) |
990 |
|
991 |
c mixing coefficients within boundary layer depend on surface |
992 |
c forcing and the magnitude and gradient of interior mixing below |
993 |
c the boundary layer ("matching"). |
994 |
c |
995 |
c caution: if mixing bottoms out at hbl = -zgrid(Nr) then |
996 |
c fictitious layer at Nrp1 is needed with small but finite width |
997 |
c hwide(Nrp1) (eg. epsln = 1.e-20). |
998 |
c |
999 |
IMPLICIT NONE |
1000 |
|
1001 |
#include "SIZE.h" |
1002 |
#include "KPP_PARAMS.h" |
1003 |
|
1004 |
c input |
1005 |
c ustar (imt) surface friction velocity (m/s) |
1006 |
c bfsfc (imt) surface buoyancy forcing (m^2/s^3) |
1007 |
c hbl (imt) boundary layer depth (m) |
1008 |
c stable(imt) = 1 in stable forcing |
1009 |
c casea (imt) = 1 in case A |
1010 |
c diffus(imt,0:Nrp1,mdiff) vertical diffusivities (m^2/s) |
1011 |
c kbl(imt) -1 of first grid level below hbl |
1012 |
_KPP_RL ustar (imt) |
1013 |
_KPP_RL bfsfc (imt) |
1014 |
_KPP_RL hbl (imt) |
1015 |
_KPP_RL stable(imt) |
1016 |
_KPP_RL casea (imt) |
1017 |
_KPP_RL diffus(imt,0:Nrp1,mdiff) |
1018 |
integer kbl(imt) |
1019 |
|
1020 |
c output |
1021 |
c dkm1 (imt,mdiff) boundary layer difs at kbl-1 level |
1022 |
c blmc (imt,Nr,mdiff) boundary layer mixing coefficients (m^2/s) |
1023 |
c ghat (imt,Nr) nonlocal scalar transport |
1024 |
c sigma(imt) normalized depth (d / hbl) |
1025 |
_KPP_RL dkm1 (imt,mdiff) |
1026 |
_KPP_RL blmc (imt,Nr,mdiff) |
1027 |
_KPP_RL ghat (imt,Nr) |
1028 |
_KPP_RL sigma(imt) |
1029 |
integer ikey |
1030 |
|
1031 |
#ifdef ALLOW_KPP |
1032 |
|
1033 |
c local |
1034 |
c gat1*(imt) shape function at sigma = 1 |
1035 |
c dat1*(imt) derivative of shape function at sigma = 1 |
1036 |
c ws(imt), wm(imt) turbulent velocity scales (m/s) |
1037 |
_KPP_RL gat1m(imt), gat1s(imt), gat1t(imt) |
1038 |
_KPP_RL dat1m(imt), dat1s(imt), dat1t(imt) |
1039 |
_KPP_RL ws(imt), wm(imt) |
1040 |
integer i, kn, ki |
1041 |
_KPP_RL R, dvdzup, dvdzdn, viscp |
1042 |
_KPP_RL difsp, diftp, visch, difsh, difth |
1043 |
_KPP_RL f1, sig, a1, a2, a3, delhat |
1044 |
_KPP_RL Gm, Gs, Gt |
1045 |
_KPP_RL tempVar |
1046 |
|
1047 |
_KPP_RL p0 , eins |
1048 |
parameter (p0=0.0, eins=1.0) |
1049 |
|
1050 |
c----------------------------------------------------------------------- |
1051 |
c compute velocity scales at hbl |
1052 |
c----------------------------------------------------------------------- |
1053 |
|
1054 |
do i = 1, imt |
1055 |
sigma(i) = stable(i) * 1.0 + (1. - stable(i)) * epsilon |
1056 |
end do |
1057 |
|
1058 |
call wscale ( |
1059 |
I sigma, hbl, ustar, bfsfc, |
1060 |
O wm, ws ) |
1061 |
|
1062 |
do i = 1, imt |
1063 |
wm(i) = sign(eins,wm(i))*max(phepsi,abs(wm(i))) |
1064 |
ws(i) = sign(eins,ws(i))*max(phepsi,abs(ws(i))) |
1065 |
end do |
1066 |
CADJ STORE wm = comlev1_kpp, key = ikey |
1067 |
CADJ STORE ws = comlev1_kpp, key = ikey |
1068 |
|
1069 |
do i = 1, imt |
1070 |
|
1071 |
kn = int(caseA(i)+phepsi) *(kbl(i) -1) + |
1072 |
$ (1 - int(caseA(i)+phepsi)) * kbl(i) |
1073 |
|
1074 |
c----------------------------------------------------------------------- |
1075 |
c find the interior viscosities and derivatives at hbl(i) |
1076 |
c----------------------------------------------------------------------- |
1077 |
|
1078 |
delhat = 0.5*hwide(kn) - zgrid(kn) - hbl(i) |
1079 |
R = 1.0 - delhat / hwide(kn) |
1080 |
dvdzup = (diffus(i,kn-1,1) - diffus(i,kn ,1)) / hwide(kn) |
1081 |
dvdzdn = (diffus(i,kn ,1) - diffus(i,kn+1,1)) / hwide(kn+1) |
1082 |
viscp = 0.5 * ( (1.-R) * (dvdzup + abs(dvdzup)) + |
1083 |
1 R * (dvdzdn + abs(dvdzdn)) ) |
1084 |
|
1085 |
dvdzup = (diffus(i,kn-1,2) - diffus(i,kn ,2)) / hwide(kn) |
1086 |
dvdzdn = (diffus(i,kn ,2) - diffus(i,kn+1,2)) / hwide(kn+1) |
1087 |
difsp = 0.5 * ( (1.-R) * (dvdzup + abs(dvdzup)) + |
1088 |
1 R * (dvdzdn + abs(dvdzdn)) ) |
1089 |
|
1090 |
dvdzup = (diffus(i,kn-1,3) - diffus(i,kn ,3)) / hwide(kn) |
1091 |
dvdzdn = (diffus(i,kn ,3) - diffus(i,kn+1,3)) / hwide(kn+1) |
1092 |
diftp = 0.5 * ( (1.-R) * (dvdzup + abs(dvdzup)) + |
1093 |
1 R * (dvdzdn + abs(dvdzdn)) ) |
1094 |
|
1095 |
visch = diffus(i,kn,1) + viscp * delhat |
1096 |
difsh = diffus(i,kn,2) + difsp * delhat |
1097 |
difth = diffus(i,kn,3) + diftp * delhat |
1098 |
|
1099 |
f1 = stable(i) * conc1 * bfsfc(i) / |
1100 |
& max(ustar(i)**4,phepsi) |
1101 |
gat1m(i) = visch / hbl(i) / wm(i) |
1102 |
dat1m(i) = -viscp / wm(i) + f1 * visch |
1103 |
dat1m(i) = min(dat1m(i),p0) |
1104 |
|
1105 |
gat1s(i) = difsh / hbl(i) / ws(i) |
1106 |
dat1s(i) = -difsp / ws(i) + f1 * difsh |
1107 |
dat1s(i) = min(dat1s(i),p0) |
1108 |
|
1109 |
gat1t(i) = difth / hbl(i) / ws(i) |
1110 |
dat1t(i) = -diftp / ws(i) + f1 * difth |
1111 |
dat1t(i) = min(dat1t(i),p0) |
1112 |
|
1113 |
end do |
1114 |
|
1115 |
do ki = 1, Nr |
1116 |
|
1117 |
c----------------------------------------------------------------------- |
1118 |
c compute turbulent velocity scales on the interfaces |
1119 |
c----------------------------------------------------------------------- |
1120 |
|
1121 |
do i = 1, imt |
1122 |
sig = (-zgrid(ki) + 0.5 * hwide(ki)) / hbl(i) |
1123 |
sigma(i) = stable(i)*sig + (1.-stable(i))*min(sig,epsilon) |
1124 |
end do |
1125 |
call wscale ( |
1126 |
I sigma, hbl, ustar, bfsfc, |
1127 |
O wm, ws ) |
1128 |
|
1129 |
c----------------------------------------------------------------------- |
1130 |
c compute the dimensionless shape functions at the interfaces |
1131 |
c----------------------------------------------------------------------- |
1132 |
|
1133 |
do i = 1, imt |
1134 |
sig = (-zgrid(ki) + 0.5 * hwide(ki)) / hbl(i) |
1135 |
a1 = sig - 2. |
1136 |
a2 = 3. - 2. * sig |
1137 |
a3 = sig - 1. |
1138 |
|
1139 |
Gm = a1 + a2 * gat1m(i) + a3 * dat1m(i) |
1140 |
Gs = a1 + a2 * gat1s(i) + a3 * dat1s(i) |
1141 |
Gt = a1 + a2 * gat1t(i) + a3 * dat1t(i) |
1142 |
|
1143 |
c----------------------------------------------------------------------- |
1144 |
c compute boundary layer diffusivities at the interfaces |
1145 |
c----------------------------------------------------------------------- |
1146 |
|
1147 |
blmc(i,ki,1) = hbl(i) * wm(i) * sig * (1. + sig * Gm) |
1148 |
blmc(i,ki,2) = hbl(i) * ws(i) * sig * (1. + sig * Gs) |
1149 |
blmc(i,ki,3) = hbl(i) * ws(i) * sig * (1. + sig * Gt) |
1150 |
|
1151 |
c----------------------------------------------------------------------- |
1152 |
c nonlocal transport term = ghat * <ws>o |
1153 |
c----------------------------------------------------------------------- |
1154 |
|
1155 |
tempVar = ws(i) * hbl(i) |
1156 |
ghat(i,ki) = (1.-stable(i)) * cg / max(phepsi,tempVar) |
1157 |
|
1158 |
end do |
1159 |
end do |
1160 |
|
1161 |
c----------------------------------------------------------------------- |
1162 |
c find diffusivities at kbl-1 grid level |
1163 |
c----------------------------------------------------------------------- |
1164 |
|
1165 |
do i = 1, imt |
1166 |
sig = -zgrid(kbl(i)-1) / hbl(i) |
1167 |
sigma(i) = stable(i) * sig |
1168 |
& + (1. - stable(i)) * min(sig,epsilon) |
1169 |
end do |
1170 |
|
1171 |
call wscale ( |
1172 |
I sigma, hbl, ustar, bfsfc, |
1173 |
O wm, ws ) |
1174 |
|
1175 |
do i = 1, imt |
1176 |
sig = -zgrid(kbl(i)-1) / hbl(i) |
1177 |
a1 = sig - 2. |
1178 |
a2 = 3. - 2. * sig |
1179 |
a3 = sig - 1. |
1180 |
Gm = a1 + a2 * gat1m(i) + a3 * dat1m(i) |
1181 |
Gs = a1 + a2 * gat1s(i) + a3 * dat1s(i) |
1182 |
Gt = a1 + a2 * gat1t(i) + a3 * dat1t(i) |
1183 |
dkm1(i,1) = hbl(i) * wm(i) * sig * (1. + sig * Gm) |
1184 |
dkm1(i,2) = hbl(i) * ws(i) * sig * (1. + sig * Gs) |
1185 |
dkm1(i,3) = hbl(i) * ws(i) * sig * (1. + sig * Gt) |
1186 |
end do |
1187 |
|
1188 |
#endif /* ALLOW_KPP */ |
1189 |
|
1190 |
return |
1191 |
end |
1192 |
|
1193 |
c************************************************************************* |
1194 |
|
1195 |
subroutine enhance ( |
1196 |
I dkm1, hbl, kbl, diffus, casea |
1197 |
U , ghat |
1198 |
O , blmc |
1199 |
& ) |
1200 |
|
1201 |
c enhance the diffusivity at the kbl-.5 interface |
1202 |
|
1203 |
IMPLICIT NONE |
1204 |
|
1205 |
#include "SIZE.h" |
1206 |
#include "KPP_PARAMS.h" |
1207 |
|
1208 |
c input |
1209 |
c dkm1(imt,mdiff) bl diffusivity at kbl-1 grid level |
1210 |
c hbl(imt) boundary layer depth (m) |
1211 |
c kbl(imt) grid above hbl |
1212 |
c diffus(imt,0:Nrp1,mdiff) vertical diffusivities (m^2/s) |
1213 |
c casea(imt) = 1 in caseA, = 0 in case B |
1214 |
_KPP_RL dkm1 (imt,mdiff) |
1215 |
_KPP_RL hbl (imt) |
1216 |
integer kbl (imt) |
1217 |
_KPP_RL diffus(imt,0:Nrp1,mdiff) |
1218 |
_KPP_RL casea (imt) |
1219 |
|
1220 |
c input/output |
1221 |
c nonlocal transport, modified ghat at kbl(i)-1 interface (s/m**2) |
1222 |
_KPP_RL ghat (imt,Nr) |
1223 |
|
1224 |
c output |
1225 |
c enhanced bound. layer mixing coeff. |
1226 |
_KPP_RL blmc (imt,Nr,mdiff) |
1227 |
|
1228 |
#ifdef ALLOW_KPP |
1229 |
|
1230 |
c local |
1231 |
c fraction hbl lies beteen zgrid neighbors |
1232 |
_KPP_RL delta |
1233 |
integer ki, i, md |
1234 |
_KPP_RL dkmp5, dstar |
1235 |
|
1236 |
do i = 1, imt |
1237 |
ki = kbl(i)-1 |
1238 |
if ((ki .ge. 1) .and. (ki .lt. Nr)) then |
1239 |
delta = (hbl(i) + zgrid(ki)) / (zgrid(ki) - zgrid(ki+1)) |
1240 |
do md = 1, mdiff |
1241 |
dkmp5 = casea(i) * diffus(i,ki,md) + |
1242 |
1 (1.- casea(i)) * blmc (i,ki,md) |
1243 |
dstar = (1.- delta)**2 * dkm1(i,md) |
1244 |
& + delta**2 * dkmp5 |
1245 |
blmc(i,ki,md) = (1.- delta)*diffus(i,ki,md) |
1246 |
& + delta*dstar |
1247 |
end do |
1248 |
ghat(i,ki) = (1.- casea(i)) * ghat(i,ki) |
1249 |
endif |
1250 |
end do |
1251 |
|
1252 |
#endif /* ALLOW_KPP */ |
1253 |
|
1254 |
return |
1255 |
end |
1256 |
|
1257 |
c************************************************************************* |
1258 |
|
1259 |
SUBROUTINE STATEKPP ( |
1260 |
I bi, bj, myThid, |
1261 |
O RHO1, DBLOC, DBSFC, TTALPHA, SSBETA) |
1262 |
c |
1263 |
c----------------------------------------------------------------------- |
1264 |
c "statekpp" computes all necessary input arrays |
1265 |
c for the kpp mixing scheme |
1266 |
c |
1267 |
c input: |
1268 |
c bi, bj = array indices on which to apply calculations |
1269 |
c |
1270 |
c output: |
1271 |
c rho1 = potential density of surface layer (kg/m^3) |
1272 |
c dbloc = local buoyancy gradient at Nr interfaces |
1273 |
c g/rho{k+1,k+1} * [ drho{k,k+1}-drho{k+1,k+1} ] (m/s^2) |
1274 |
c dbsfc = buoyancy difference with respect to the surface |
1275 |
c g * [ drho{1,k}/rho{1,k} - drho{k,k}/rho{k,k} ] (m/s^2) |
1276 |
c ttalpha= thermal expansion coefficient without 1/rho factor |
1277 |
c d(rho) / d(potential temperature) (kg/m^3/C) |
1278 |
c ssbeta = salt expansion coefficient without 1/rho factor |
1279 |
c d(rho) / d(salinity) (kg/m^3/PSU) |
1280 |
c |
1281 |
c see also subroutines find_rho.F find_alpha.F find_beta.F |
1282 |
c |
1283 |
c written by: jan morzel, feb. 10, 1995 (converted from "sigma" version) |
1284 |
c modified by: d. menemenlis, june 1998 : for use with MIT GCM UV |
1285 |
c |
1286 |
c----------------------------------------------------------------------- |
1287 |
|
1288 |
IMPLICIT NONE |
1289 |
|
1290 |
#include "SIZE.h" |
1291 |
#include "EEPARAMS.h" |
1292 |
#include "PARAMS.h" |
1293 |
#include "KPP_PARAMS.h" |
1294 |
|
1295 |
c-------------- Routine arguments ----------------------------------------- |
1296 |
INTEGER bi, bj, myThid |
1297 |
_KPP_RL RHO1 ( ibot:itop, jbot:jtop ) |
1298 |
_KPP_RL DBLOC ( ibot:itop, jbot:jtop, Nr ) |
1299 |
_KPP_RL DBSFC ( ibot:itop, jbot:jtop, Nr ) |
1300 |
_KPP_RL TTALPHA( ibot:itop, jbot:jtop, Nrp1 ) |
1301 |
_KPP_RL SSBETA ( ibot:itop, jbot:jtop, Nrp1 ) |
1302 |
|
1303 |
#ifdef ALLOW_KPP |
1304 |
|
1305 |
c-------------------------------------------------------------------------- |
1306 |
c |
1307 |
c local arrays: |
1308 |
c |
1309 |
c rhok - density of t(k ) & s(k ) at depth k |
1310 |
c rhokm1 - density of t(k-1) & s(k-1) at depth k |
1311 |
c rho1k - density of t(1 ) & s(1 ) at depth k |
1312 |
c work1, work2 - work arrays for holding horizontal slabs |
1313 |
|
1314 |
_RL RHOK (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1315 |
_RL RHOKM1(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1316 |
_RL RHO1K (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1317 |
_RL WORK1 (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1318 |
_RL WORK2 (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1319 |
_RL WORK3 (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
1320 |
INTEGER I, J, K |
1321 |
|
1322 |
c calculate density, alpha, beta in surface layer, and set dbsfc to zero |
1323 |
|
1324 |
call FIND_RHO( |
1325 |
I bi, bj, ibot, itop, jbot, jtop, 1, 1, eosType, |
1326 |
O WORK1, |
1327 |
I myThid ) |
1328 |
|
1329 |
call FIND_ALPHA( |
1330 |
I bi, bj, ibot, itop, jbot, jtop, 1, 1, eosType, |
1331 |
O WORK2 ) |
1332 |
|
1333 |
call FIND_BETA( |
1334 |
I bi, bj, ibot, itop, jbot, jtop, 1, 1, eosType, |
1335 |
O WORK3 ) |
1336 |
|
1337 |
DO J = jbot, jtop |
1338 |
DO I = ibot, itop |
1339 |
RHO1(I,J) = WORK1(I,J) + rhonil |
1340 |
TTALPHA(I,J,1) = WORK2(I,J) |
1341 |
SSBETA(I,J,1) = WORK3(I,J) |
1342 |
DBSFC(I,J,1) = 0. |
1343 |
END DO |
1344 |
END DO |
1345 |
|
1346 |
c calculate alpha, beta, and gradients in interior layers |
1347 |
|
1348 |
CHPF$ INDEPENDENT, NEW (RHOK,RHOKM1,RHO1K,WORK1,WORK2) |
1349 |
DO K = 2, Nr |
1350 |
|
1351 |
call FIND_RHO( |
1352 |
I bi, bj, ibot, itop, jbot, jtop, K, K, eosType, |
1353 |
O RHOK, |
1354 |
I myThid ) |
1355 |
|
1356 |
call FIND_RHO( |
1357 |
I bi, bj, ibot, itop, jbot, jtop, K-1, K, eosType, |
1358 |
O RHOKM1, |
1359 |
I myThid ) |
1360 |
|
1361 |
call FIND_RHO( |
1362 |
I bi, bj, ibot, itop, jbot, jtop, 1, K, eosType, |
1363 |
O RHO1K, |
1364 |
I myThid ) |
1365 |
|
1366 |
call FIND_ALPHA( |
1367 |
I bi, bj, ibot, itop, jbot, jtop, K, K, eosType, |
1368 |
O WORK1 ) |
1369 |
|
1370 |
call FIND_BETA( |
1371 |
I bi, bj, ibot, itop, jbot, jtop, K, K, eosType, |
1372 |
O WORK2 ) |
1373 |
|
1374 |
DO J = jbot, jtop |
1375 |
DO I = ibot, itop |
1376 |
TTALPHA(I,J,K) = WORK1 (I,J) |
1377 |
SSBETA(I,J,K) = WORK2 (I,J) |
1378 |
DBLOC(I,J,K-1) = gravity * (RHOK(I,J) - RHOKM1(I,J)) / |
1379 |
& (RHOK(I,J) + rhonil) |
1380 |
DBSFC(I,J,K) = gravity * (RHOK(I,J) - RHO1K (I,J)) / |
1381 |
& (RHOK(I,J) + rhonil) |
1382 |
END DO |
1383 |
END DO |
1384 |
|
1385 |
END DO |
1386 |
|
1387 |
c compute arrays for K = Nrp1 |
1388 |
DO J = jbot, jtop |
1389 |
DO I = ibot, itop |
1390 |
TTALPHA(I,J,Nrp1) = TTALPHA(I,J,Nr) |
1391 |
SSBETA(I,J,Nrp1) = SSBETA(I,J,Nr) |
1392 |
DBLOC(I,J,Nr) = 0. |
1393 |
END DO |
1394 |
END DO |
1395 |
|
1396 |
#endif /* ALLOW_KPP */ |
1397 |
|
1398 |
RETURN |
1399 |
END |