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jmc |
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C $Header: /u/gcmpack/MITgcm/pkg/thsice/thsice_reshape_layers.F,v 1.1 2004/04/07 23:40:34 jmc Exp $ |
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jmc |
1.1 |
C $Name: $ |
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#include "THSICE_OPTIONS.h" |
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CBOP |
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C !ROUTINE: THSICE_RESHAPE_LAYERS |
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C !INTERFACE: |
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SUBROUTINE THSICE_RESHAPE_LAYERS( |
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U qicen, |
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I hlyr, hnew, myThid ) |
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C !DESCRIPTION: \bv |
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C *==========================================================* |
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C | S/R THSICE_RESHAPE_LAYERS |
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C | Repartition into equal-thickness layers, conserving energy. |
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C *==========================================================* |
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C | This is the 2-layer version (formerly "NEW_LAYERS_WINTON") |
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C | from M. Winton 1999, JAOT, sea-ice model. |
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C *==========================================================* |
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C \ev |
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C !USES: |
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IMPLICIT NONE |
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C == Global variables === |
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jmc |
1.2 |
#include "EEPARAMS.h" |
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jmc |
1.1 |
#include "THSICE_PARAMS.h" |
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C !INPUT/OUTPUT PARAMETERS: |
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C == Routine Arguments == |
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C qicen :: ice enthalpy (J m-3) |
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C hnew :: new ice layer thickness (m) |
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C hlyr :: individual ice layer thickness (m) |
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C myThid :: Number of this instance |
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_RL qicen(*) |
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_RL hnew(*) |
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_RL hlyr |
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INTEGER myThid |
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CEOP |
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#ifdef ALLOW_THSICE |
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C == Local Variables == |
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C f1 :: Fraction of upper layer ice in new layer |
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C qh1, qh2 :: qice*h for layers 1 and 2 |
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C qhtot :: qh1 + qh2 |
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C q2tmp :: Temporary value of qice for layer 2 |
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_RL f1 |
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_RL qh1, qh2 |
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_RL qhtot |
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_RL q2tmp |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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if (hnew(1).gt.hnew(2)) then |
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C- Layer 1 gives ice to layer 2 |
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f1 = (hnew(1)-hlyr)/hlyr |
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q2tmp = f1*qicen(1) + (1. _d 0-f1)*qicen(2) |
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if (q2tmp.gt.Lfresh) then |
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qicen(2) = q2tmp |
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else |
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C- Keep q2 fixed to avoid q2<Lfresh and T2>0 |
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qh2 = hlyr*qicen(2) |
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qhtot = hnew(1)*qicen(1) + hnew(2)*qicen(2) |
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qh1 = qhtot - qh2 |
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qicen(1) = qh1/hlyr |
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endif |
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else |
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C- Layer 2 gives ice to layer 1 |
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f1 = hnew(1)/hlyr |
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qicen(1) = f1*qicen(1) + (1. _d 0-f1)*qicen(2) |
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endif |
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#endif /* ALLOW_THSICE */ |
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RETURN |
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END |
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