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C $Header: /u/gcmpack/MITgcm_contrib/dgoldberg/streamice/streamice_adv_front.F,v 1.5 2012/10/03 02:37:16 heimbach Exp $ |
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C $Name: $ |
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|
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#include "STREAMICE_OPTIONS.h" |
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|
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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|
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CBOP |
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SUBROUTINE STREAMICE_ADV_FRONT ( myThid, time_step ) |
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|
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C /============================================================\ |
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C | SUBROUTINE | |
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C | o | |
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C |============================================================| |
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C | | |
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C \============================================================/ |
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IMPLICIT NONE |
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|
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C === Global variables === |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "EEPARAMS.h" |
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#include "PARAMS.h" |
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#include "STREAMICE.h" |
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#include "STREAMICE_ADV.h" |
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#ifdef ALLOW_AUTODIFF_TAMC |
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# include "tamc.h" |
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#endif |
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|
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INTEGER myThid |
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_RL time_step |
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|
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#ifdef ALLOW_STREAMICE |
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|
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INTEGER i, j, bi, bj, k, iter_count, iter_rpt |
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INTEGER Gi, Gj |
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INTEGER new_partial(4) |
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INTEGER ikey_front, ikey_1 |
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_RL iter_flag |
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_RL n_flux_1, n_flux_2 |
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_RL href, rho, partial_vol, tot_flux, hpot |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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|
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rho = streamice_density |
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cph iter_count = 0 |
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iter_flag = 1. _d 0 |
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iter_rpt = 0 |
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|
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DO iter_count = 0, 3 |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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ikey_front = (ikey_dynamics-1)*4 + iter_count + 1 |
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CADJ STORE area_shelf_streamice |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE h_streamice |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE hflux_x_si |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE hflux_x_si2 |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE hflux_y_si |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE hflux_y_si2 |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE streamice_hmask |
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CADJ & = comlev1_stream_front, key = ikey_front |
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CADJ STORE iter_flag |
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CADJ & = comlev1_stream_front, key = ikey_front |
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#endif |
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|
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IF ( iter_flag .GT. 0. ) THEN |
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|
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iter_flag = 0. _d 0 |
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|
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IF (iter_count .gt. 0) then |
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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DO j=1-OLy,sNy+OLy |
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DO i=1-OLx,sNx+OLx |
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hflux_x_SI(i,j,bi,bj)=hflux_x_SI2(i,j,bi,bj) |
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hflux_y_SI(i,j,bi,bj)=hflux_y_SI2(i,j,bi,bj) |
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hflux_x_SI2(i,j,bi,bj) = 0. _d 0 |
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hflux_y_SI2(i,j,bi,bj) = 0. _d 0 |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDDO |
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ENDIF |
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|
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! iter_count = iter_count + 1 |
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iter_rpt = iter_rpt + 1 |
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|
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DO bj=myByLo(myThid),myByHi(myThid) |
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DO bi=myBxLo(myThid),myBxHi(myThid) |
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|
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DO j=1-1,sNy+1 |
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Gj = (myYGlobalLo-1)+(bj-1)*sNy+j |
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cph IF ((Gj .ge. 1) .and. (Gj .le. Ny)) THEN |
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DO i=1-1,sNx+1 |
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Gi = (myXGlobalLo-1)+(bi-1)*sNx+i |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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act1 = bi - myBxLo(myThid) |
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max1 = myBxHi(myThid) - myBxLo(myThid) + 1 |
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act2 = bj - myByLo(myThid) |
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max2 = myByHi(myThid) - myByLo(myThid) + 1 |
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act3 = myThid - 1 |
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max3 = nTx*nTy |
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act4 = ikey_front - 1 |
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ikey_1 = i + 1 |
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& + (sNx+2)*(j) |
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& + (sNx+2)*(sNy+2)*act1 |
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& + (sNx+2)*(sNy+2)*max1*act2 |
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& + (sNx+2)*(sNy+2)*max1*max2*act3 |
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& + (sNx+2)*(sNy+2)*max1*max2*max3*act4 |
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CADJ STORE area_shelf_streamice(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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CADJ STORE h_streamice(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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CADJ STORE hflux_x_si(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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CADJ STORE hflux_y_si(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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CADJ STORE streamice_hmask(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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#endif |
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|
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cph IF ((Gi .ge. 1) .and. (Gi .le. Nx) .and. |
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IF ((STREAMICE_Hmask(i,j,bi,bj).eq.0.0 .or. |
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& STREAMICE_Hmask(i,j,bi,bj).eq.2.0)) THEN |
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n_flux_1 = 0. _d 0 |
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href = 0. _d 0 |
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tot_flux = 0. _d 0 |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE hflux_x_SI(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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#endif |
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IF (hflux_x_SI(i,j,bi,bj).gt. 0. _d 0) THEN |
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n_flux_1 = n_flux_1 + 1. _d 0 |
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href = href + H_streamice(i-1,j,bi,bj) |
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tot_flux = tot_flux + hflux_x_SI(i,j,bi,bj) * |
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& dxG(i,j,bi,bj) * time_step |
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hflux_x_SI(i,j,bi,bj) = 0. _d 0 |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE hflux_x_SI(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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#endif |
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IF (hflux_x_SI(i+1,j,bi,bj).lt. 0. _d 0) THEN |
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n_flux_1 = n_flux_1 + 1. _d 0 |
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href = href + H_streamice(i+1,j,bi,bj) |
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tot_flux = tot_flux - hflux_x_SI(i+1,j,bi,bj) * |
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& dxG(i+1,j,bi,bj) * time_step |
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hflux_x_SI(i+1,j,bi,bj) = 0. _d 0 |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE hflux_y_SI(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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#endif |
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IF (hflux_y_SI(i,j,bi,bj).gt. 0. _d 0) THEN |
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n_flux_1 = n_flux_1 + 1. _d 0 |
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href = href + H_streamice(i,j-1,bi,bj) |
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tot_flux = tot_flux + hflux_y_SI(i,j,bi,bj) * |
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& dyG(i,j,bi,bj) * time_step |
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hflux_y_SI(i,j,bi,bj) = 0. _d 0 |
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ENDIF |
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|
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#ifdef ALLOW_AUTODIFF_TAMC |
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CADJ STORE hflux_y_SI(i,j,bi,bj) |
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CADJ & = comlev1_stream_ij, key = ikey_1 |
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#endif |
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IF (hflux_y_SI(i,j+1,bi,bj).lt. 0. _d 0) THEN |
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n_flux_1 = n_flux_1 + 1. _d 0 |
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href = href + H_streamice(i,j+1,bi,bj) |
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tot_flux = tot_flux - hflux_y_SI(i,j+1,bi,bj) * |
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& dyG(i,j+1,bi,bj) * time_step |
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hflux_y_SI(i,j+1,bi,bj) = 0. _d 0 |
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ENDIF |
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|
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IF (n_flux_1 .gt. 0.) THEN |
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|
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href = href / n_flux_1 |
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partial_vol = H_streamice (i,j,bi,bj) * |
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& area_shelf_streamice (i,j,bi,bj) + tot_flux |
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hpot = partial_vol * recip_rA(i,j,bi,bj) |
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|
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IF (hpot .eq. href) THEN ! cell is exactly covered, no overflow |
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STREAMICE_hmask (i,j,bi,bj) = 1.0 |
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H_streamice (i,j,bi,bj) = href |
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area_shelf_streamice(i,j,bi,bj) = |
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& rA(i,j,bi,bj) |
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ELSEIF (hpot .lt. href) THEN ! cell still unfilled |
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|
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|
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|
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STREAMICE_hmask (i,j,bi,bj) = 2.0 |
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area_shelf_streamice (i,j,bi,bj) = partial_vol / href |
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H_streamice (i,j,bi,bj) = href |
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ELSE ! cell is filled - do overflow |
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|
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|
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STREAMICE_hmask (i,j,bi,bj) = 1.0 |
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area_shelf_streamice(i,j,bi,bj) = |
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& rA(i,j,bi,bj) |
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|
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|
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partial_vol = partial_vol - href * rA(i,j,bi,bj) |
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|
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iter_flag = 1. _d 0 |
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|
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n_flux_2 = 0. _d 0 ; |
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DO k=1,4 |
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new_partial (:) = 0 |
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ENDDO |
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|
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DO k=1,2 |
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IF (STREAMICE_ufacemask(i-1+k,j,bi,bj).eq.2.0) THEN ! at a permanent calving boundary - no advance allowed |
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n_flux_2 = n_flux_2 + 1. _d 0 |
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ELSEIF (STREAMICE_hmask(i+2*k-3,j,bi,bj).eq.0 _d 0) THEN ! adjacent cell is completely ice free |
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n_flux_2 = n_flux_2 + 1. _d 0 |
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new_partial (k) = 1 |
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ENDIF |
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ENDDO |
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DO k=1,2 |
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IF (STREAMICE_vfacemask (i,j-1+k,bi,bj).eq.2.0) THEN |
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n_flux_2 = n_flux_2 + 1. _d 0 |
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ELSEIF (STREAMICE_hmask(i,j+2*k-3,bi,bj).eq.0 _d 0) THEN |
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n_flux_2 = n_flux_2 + 1. _d 0 |
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new_partial (k+2) = 1 |
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ENDIF |
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ENDDO |
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|
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IF (n_flux_2 .eq. 0.) THEN ! there is nowhere to put the extra ice! |
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H_streamice(i,j,bi,bj) = href + partial_vol * |
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& recip_rA(i,j,bi,bj) |
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ELSE |
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H_streamice(i,j,bi,bj) = href |
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|
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DO k=1,2 |
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IF (new_partial(k) .eq. 1) THEN |
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hflux_x_SI2(i-1+k,j,bi,bj) = |
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& partial_vol/time_step/n_flux_2/ |
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& dxG(i-1+k,j,bi,bj) |
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ENDIF |
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ENDDO |
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|
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DO k=1,2 |
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IF (new_partial(k+2) .eq. 1) THEN |
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hflux_y_SI2(i,j-1+k,bi,bj) = |
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& partial_vol/time_step/n_flux_2/ |
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& dxG(i,j-1+k,bi,bj) |
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ENDIF |
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ENDDO |
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|
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ENDIF |
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ENDIF |
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ENDIF |
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|
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ENDIF |
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ENDDO |
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cph ENDIF |
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ENDDO |
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c |
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ENDDO |
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ENDDO |
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c |
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ENDIF |
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ENDDO |
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|
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IF (iter_rpt.gt.1) THEN |
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WRITE(msgBuf,'(A,I5,A)') 'FRONT ADVANCE: ',iter_rpt, |
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& ' ITERATIONS' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , 1) |
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ENDIF |
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|
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|
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|
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#endif |
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RETURN |
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END |
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