/[MITgcm]/MITgcm/verification/lab_sea/code_ad/SEAICE_OPTIONS.h

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-revision 1.8 by gforget,
Wed Oct  6 20:13:34 2010 UTC
+revision 1.9 by jmc,
Fri Oct 29 00:16:11 2010 UTC
 Line 1
  C $Header$
  C $Name$
- C     /==========================================================\
+ C     *==========================================================*
  C     | SEAICE_OPTIONS.h                                         |
  C     | o CPP options file for sea ice package.                  |
- C     |==========================================================|
+ C     *==========================================================*
  C     | Use this file for selecting options within the sea ice   |
  C     | package.                                                 |
- C     \==========================================================/
+ C     *==========================================================*
  #ifndef SEAICE_OPTIONS_H
  #define SEAICE_OPTIONS_H
 Line 40 
 C     Therefore it is not possible to sw
  C     in the middle of an integration.
  #define SEAICE_MULTICATEGORY
- C--   By default cdm wind stress under sea-ice is set to the
+ C--   Use the Old version of seaice_growth (close to cvs version 1.70)
- C     same value as it would be if there was no sea-ice.
+ C     otherwise, use the merged version (with some of Ian Fenty s code)
- C     This is a placeholder until a more physically-sensible
+ #define SEAICE_GROWTH_LEGACY
- C     stable solution is developed.  Apparently ocean stress
- C     that is based on sea-ice velocity can cause trouble in
+ C--   options only available in the merged version (from Ian Fenty s code)
- C     Arctic Ocean configurations.  This temporary solution
+ #ifndef SEAICE_GROWTH_LEGACY
- C     also corresponds to that adopted by CCSM-2.  For the
+ C-    to switch on/off open-water freezing contribution to thickness tendency:
- C     adventurous user who requires ice-modified stress,
+ #define SEAICE_DO_OPEN_WATER_GROWTH
- C     following options are available.
+ C-    to switch on/off ocean heat contribution to seaice cover reduction:
- #undef SEAICE_ORIGINAL_BAD_ICE_STRESS
+ #define SEAICE_OCN_MELT_ACT_ON_AREA
- #undef SEAICE_TEST_ICE_STRESS_1
+ #endif
+ C--   Use the Old version of seaice_solve4temp (formerly seaice_budget_ice)
+ C     otherwise, use Ian Fenty s version
+ #define SEAICE_SOLVE4TEMP_LEGACY
  C--   By default the freezing point of water is set to the value of
  C     the parameter SEAICE_freeze (=-1.96 by default). To use a
-Line 60 
 C     which is a good assumption for the
+Line 64 
 C     which is a good assumption for the
  C     option defined the parameter SEAICE_freeze has no effect.
  #undef SEAICE_VARIABLE_FREEZING_POINT
+ C--   Allow SEAICEuseFlooding, which converts snow to ice if submerged.
+ #define ALLOW_SEAICE_FLOODING
+ C--   By default sea ice is fresh.  Set following flag for salty ice.
+ #define SEAICE_SALINITY
+ C--   Track sea ice age.
+ C     By default sea ice age is associated with ice area.
+ C     Define SEAICE_AGE_VOL to associate age with volume.
+ #undef SEAICE_AGE
+ #ifdef SEAICE_AGE
+ # undef SEAICE_AGE_VOL
+ #endif
  C--   By default the seaice model is discretized on a B-Grid (for
  C     historical reasons). Define the following flag to use a new
  C     (not thoroughly) test version on a C-grid
  #define SEAICE_CGRID
- C--   Only for the C-grid version it is possible to enable EVP code by
+ C--   Only for the C-grid version it is possible to
- C     defining the following flag
  #ifdef SEAICE_CGRID
- #define SEAICE_ALLOW_EVP
+ C     enable EVP code by defining the following flag
+ # define SEAICE_ALLOW_EVP
+ # ifdef SEAICE_ALLOW_EVP
+ C--   When set use SEAICE_zetaMin and SEAICE_evpDampC to limit
+ C--   viscosities from below and above in seaice_evp
+ C--   not necessary, and not recommended
+ #  undef SEAICE_ALLOW_CLIPZETA
+ # endif /* SEAICE_ALLOW_EVP */
+ C     allow the truncated ellipse rheology (runtime flag SEAICEuseTEM)
+ # undef SEAICE_ALLOW_TEM
+ #else /* not SEAICE_CGRID, but old B-grid */
+ C--   By default for B-grid dynamics solver wind stress under sea-ice is
+ C     set to the same value as it would be if there was no sea-ice.
+ C     Define following CPP flag for B-grid ice-ocean stress coupling.
+ # define SEAICE_BICE_STRESS
+ C--   By default for B-grid dynamics solver surface tilt is obtained
+ C     indirectly via geostrophic velocities. Define following CPP
+ C     in order to use ETAN instead.
+ # define EXPLICIT_SSH_SLOPE
  #endif /* SEAICE_CGRID */
- C--   Seaice flooding
+ C--   When set use MAX_HEFF to cap sea ice thickness in seaice_growth
- #define ALLOW_SEAICE_FLOODING
+ #undef SEAICE_CAP_HEFF
+ C--   When set limit the Ice-Loading to mass of 1/5 of Surface ocean grid-box
- C--   By default sea ice is fresh.  Set following flag for salty ice.
+ #undef SEAICE_CAP_ICELOAD
- #define SEAICE_SALINITY
+ C--   When set use SEAICE_clipVelocties = .true., to clip U/VICE at 40cm/s,
+ C--   not recommended
- c--   Enable modified sea-ice thermodynamic by Ian Fenty
+ #undef SEAICE_ALLOW_CLIPVELS
- c--   Should improve adjoint, but doesnt work so far.
- #undef SEAICE_ALLOW_TD_IF
  C     enable free drift code
  #define SEAICE_ALLOW_FREEDRIFT

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