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

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-revision 1.3 by dimitri,
Tue Feb 18 05:33:56 2003 UTC
+revision 1.16 by gforget,
Thu Oct  7 21:17:48 2010 UTC
 Line 1
- C
+ C $Header$
+ C $Name$
  C     /==========================================================\
  C     | SEAICE_OPTIONS.h                                         |
  C     | o CPP options file for sea ice package.                  |
  C     |==========================================================|
  C     | Use this file for selecting options within the sea ice   |
- C     | package.  Sea ice model is enabled with ALLOW_SEAICE in  |
+ C     | package.                                                 |
- C     | CPP_OPTIONS.h                                            |
  C     \==========================================================/
+ #ifndef SEAICE_OPTIONS_H
+ #define SEAICE_OPTIONS_H
+ #include "PACKAGES_CONFIG.h"
  #include "CPP_OPTIONS.h"
- #ifdef ALLOW_SEAICE
  C--   Write "text-plots" of certain fields in STDOUT for debugging.
  #undef SEAICE_DEBUG
-Line 23 
 C     Sea-ice dynamics can also be turne
+Line 24 
 C     Sea-ice dynamics can also be turne
  C     using variable SEAICEuseDYNAMICS.
  #define SEAICE_ALLOW_DYNAMICS
- C--   By default, pkg/seaice defines forcing variable internally, in
- C     SEAICE_FFIELDS.h, and reads them in from files.  When CPP option
- C     SEAICE_EXTERNAL_FORCING is defined, the above forcing variables
- C     are defined and provided by an external package.  At present this
- C     option is hardwired for pkg/exf and the variables are passed using
- C     include file exf_fields.h.
- #define SEAICE_EXTERNAL_FORCING
  C--   By default, the sea-ice package uses its own integrated bulk
  C     formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over
  C     open-ocean.  When this flag is set, these variables are computed
  C     in a separate external package, for example, pkg/exf, and then
  C     modified for sea-ice effects by pkg/seaice.
- #undef SEAICE_EXTERNAL_FLUXES
+ #define SEAICE_EXTERNAL_FLUXES
- #endif /* ALLOW_SEAICE */
+ C--   By default, the sea-ice package uses 2-category thermodynamics.
+ C     When this flag is set, an 8-category calculation of ice
+ C     thermodynamics is carried out in groatb.F
+ C     Note the pickup_seaice.* generated by this option differ
+ C     from those generated with the default 2-category model.
+ C     Therefore it is not possible to switch between the two
+ C     in the middle of an integration.
+ #undef SEAICE_MULTICATEGORY
+ 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
+ C     simple linear dependence of the freezing point on salinity,
+ C     set the following flag (pressure is assumed to have no effect,
+ C     which is a good assumption for the top 20 meters). With this
+ C     option defined the parameter SEAICE_freeze has no effect.
+ #define 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.
+ #define SEAICE_AGE
+ #ifdef SEAICE_AGE
+ # define 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
+ #ifdef SEAICE_CGRID
+ 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
+ #  define 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--   When set use MAX_HEFF to cap sea ice thickness in seaice_growth
+ #undef SEAICE_CAP_HEFF
+ C--   When set use SEAICE_clipVelocties = .true., to clip U/VICE at 40cm/s,
+ C--   not recommended
+ #define SEAICE_ALLOW_CLIPVELS
+ C     enable free drift code
+ #define SEAICE_ALLOW_FREEDRIFT
+ #endif /* SEAICE_OPTIONS_H */
+ CEH3 ;;; Local Variables: ***
+ CEH3 ;;; mode:fortran ***
+ CEH3 ;;; End: ***

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