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C $Header: /u/gcmpack/MITgcm/pkg/cost/Attic/cost_ice.F,v 1.1.2.3 2003/06/17 20:48:22 dimitri Exp $ |
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#include "COST_CPPOPTIONS.h" |
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|
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subroutine cost_ice ( |
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I mytime, |
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I myiter, |
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I mythid |
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& ) |
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|
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c ================================================================== |
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c SUBROUTINE cost_ice |
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c ================================================================== |
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c |
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c o Compute sea-ice cost function. The following options can |
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c be selected with data.cost variable cost_ice_flag: |
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c |
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c cost_ice_flag = 1 |
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c - compute mean sea-ice volume |
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c costIceStart < mytime < costIceEnd |
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c |
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c cost_ice_flag = 2 |
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c - compute mean sea-ice area |
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c costIceStart < mytime < costIceEnd |
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c |
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c cost_ice_flag = 3 |
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c - heat content of top level plus latent heat of sea-ice |
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c costIceStart < mytime < costIceEnd |
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c |
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c cost_ice_flag = 4 |
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c - heat content of top level |
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c costIceStart < mytime < costIceEnd |
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c |
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c cost_ice_flag = 5 |
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c - heat content of top level plus sea-ice plus latent heat of snow |
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c costIceStart < mytime < costIceEnd |
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c |
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c cost_ice_flag = 6 |
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c - quadratic cost function measuring difference between pkg/seaice |
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c AREA variable and simulated sea-ice measurements at every time |
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c step. |
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c |
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c ================================================================== |
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c |
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c started: menemenlis@jpl.nasa.gov 26-Feb-2003 |
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c |
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c ================================================================== |
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c SUBROUTINE cost_ice |
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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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#ifdef ALLOW_COST_ICE |
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#include "EEPARAMS.h" |
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#include "SIZE.h" |
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#include "GRID.h" |
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#include "PARAMS.h" |
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#include "ecco_cost.h" |
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#include "SEAICE.h" |
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#include "DYNVARS.h" |
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#endif /* ALLOW_COST_ICE */ |
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|
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c == routine arguments == |
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|
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_RL mytime |
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integer myiter |
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integer mythid |
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|
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#ifdef ALLOW_COST_ICE |
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|
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c == local variables == |
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c msgBuf - Informational/error message buffer |
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CHARACTER*(MAX_LEN_MBUF) msgBuf |
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integer bi,bj,i,j |
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_RL tempVar |
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|
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c == external functions == |
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|
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integer ilnblnk |
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external ilnblnk |
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|
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c == end of interface == |
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if ( mytime .ge. costIceStart .and. mytime .le. costIceEnd ) then |
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tempVar = 1. / ( 1. + int( ( min ( endtime, costIceEnd ) - |
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& max ( starttime, costIceStart ) ) / deltaTClock ) ) |
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|
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if ( cost_ice_flag .eq. 1 ) then |
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c sea-ice volume |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& tempVar * rA(i,j,bi,bj) * HEFF(i,j,1,bi,bj) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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elseif ( cost_ice_flag .eq. 2 ) then |
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c sea-ice area |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& tempVar * rA(i,j,bi,bj) * AREA(i,j,1,bi,bj) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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c heat content of top level: |
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c theta * delZ * (sea water heat capacity = 3996 J/kg/K) |
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c * (density of sea-water = 1026 kg/m^3) |
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c |
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c heat content of sea-ice: |
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c tice * heff * (sea ice heat capacity = 2090 J/kg/K) |
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c * (density of sea-ice = 910 kg/m^3) |
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c |
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c note: to remove mass contribution to heat content, |
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c which is not properly accounted for by volume converving |
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c ocean model, theta and tice are referenced to freezing |
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c temperature of sea-ice, here -1.96 deg C |
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c |
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c latent heat content of sea-ice: |
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c - heff * (latent heat of fusion = 334000 J/kg) |
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c * (density of sea-ice = 910 kg/m^3) |
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c |
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c latent heat content of snow: |
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c - hsnow * (latent heat of fusion = 334000 J/kg) |
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c * (density of snow = 330 kg/m^3) |
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elseif ( cost_ice_flag .eq. 3 ) then |
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c heat content of top level plus latent heat of sea-ice |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& tempVar * rA(i,j,bi,bj) * ( |
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& (THETA(i,j,1,bi,bj) + 1.96 ) * |
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& drF(1) * 3996 * 1026 - |
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& HEFF(i,j,1,bi,bj) * 334000 * 910 ) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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elseif ( cost_ice_flag .eq. 4 ) then |
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c heat content of top level |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& tempVar * rA(i,j,bi,bj) * ( |
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& (THETA(i,j,1,bi,bj) + 1.96 ) * |
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& drF(1) * 3996 * 1026 ) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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elseif ( cost_ice_flag .eq. 5 ) then |
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c heat content of top level plus sea-ice plus latent heat of snow |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& tempVar * rA(i,j,bi,bj) * ( |
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& (THETA(i,j,1,bi,bj) + 1.96 ) * |
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& drF(1) * 3996 * 1026 + |
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& (TICE(i,j,bi,bj) - 273.15 + 1.96 ) * |
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& HEFF(I,J,1,bi,bj) * 2090 * 910 - |
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& HEFF(i,j,1,bi,bj) * 334000 * 910 - |
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& HSNOW(I,J,bi,bj) * 334000 * 330 ) |
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enddo |
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enddo |
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enddo |
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enddo |
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elseif ( cost_ice_flag .eq. 6 ) then |
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c Qadratic cost function measuring difference between pkg/seaice |
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c AREA variable and simulated sea-ice measurements at every time |
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c step. For time being no measurements are read-in. It is |
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c assumed that measurements are AREA=0.5 at all times everywhere. |
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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,sny |
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do i = 1,snx |
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objf_ice(bi,bj) = objf_ice(bi,bj) + |
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& ( AREA(i,j,1,bi,bj) - 0.5 ) * |
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& ( AREA(i,j,1,bi,bj) - 0.5 ) |
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enddo |
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enddo |
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enddo |
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enddo |
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|
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else |
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WRITE(msgBuf,'(A)') |
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& 'COST_ICE: invalid cost_ice_flag' |
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CALL PRINT_MESSAGE( msgBuf, standardMessageUnit, |
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& SQUEEZE_RIGHT , myThid ) |
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STOP 'ABNORMAL END: S/R COST_ICE' |
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endif |
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endif |
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|
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#endif /* ALLOW_COST_ICE */ |
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|
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end |
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