/[MITgcm]/MITgcm_contrib/high_res_cube/code-mods/SEAICE_OPTIONS.h
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revision 1.8 by dimitri, Wed Feb 7 01:30:48 2007 UTC revision 1.16 by dimitri, Fri Jan 11 20:23:44 2008 UTC
# Line 23  C     Sea-ice dynamics can also be turne Line 23  C     Sea-ice dynamics can also be turne
23  C     using variable SEAICEuseDYNAMICS.  C     using variable SEAICEuseDYNAMICS.
24  #define SEAICE_ALLOW_DYNAMICS  #define SEAICE_ALLOW_DYNAMICS
25    
 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  
 #ifdef SEAICE_EXTERNAL_FORCING  
 #include "EXF_OPTIONS.h"  
 #endif /* SEAICE_EXTERNAL_FORCING */  
   
26  C--   By default, the sea-ice package uses its own integrated bulk  C--   By default, the sea-ice package uses its own integrated bulk
27  C     formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over  C     formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over
28  C     open-ocean.  When this flag is set, these variables are computed  C     open-ocean.  When this flag is set, these variables are computed
# Line 48  C     Note the pickup_seaice.* generated Line 37  C     Note the pickup_seaice.* generated
37  C     from those generated with the default 2-category model.  C     from those generated with the default 2-category model.
38  C     Therefore it is not possible to switch between the two  C     Therefore it is not possible to switch between the two
39  C     in the middle of an integration.  C     in the middle of an integration.
40  #undef SEAICE_MULTICATEGORY  #define SEAICE_MULTICATEGORY
41    
42  C--   By default cdm wind stress under sea-ice is set to the  C--   By default for B-grid dynamics solver wind stress under sea-ice is
43  C     same value as it would be if there was no sea-ice.  C     set to the same value as it would be if there was no sea-ice.
44  C     This is a placeholder until a more physically-sensible  C     Define following CPP flag for B-grid ice-ocean stress coupling.
 C     stable solution is developed.  Apparently ocean stress  
 C     that is based on sea-ice velocity can cause trouble in  
 C     Arctic Ocean configurations.  This temporary solution  
 C     also corresponds to that adopted by CCSM-2.  For the  
 C     adventurous user who requires ice-modified stress,  
 C     following options are available.  
 #undef SEAICE_ORIGINAL_BAD_ICE_STRESS  
45  #undef SEAICE_TEST_ICE_STRESS_1  #undef SEAICE_TEST_ICE_STRESS_1
46    
47    C--   By default for B-grid dynamics solver surface tilt is obtained
48    C     indirectly via geostrophic velocities.  Define following CPP
49    C     in order to ues ETAN instead.
50    #undef EXPLICIT_SSH_SLOPE
51    
52  C--   By default the freezing point of water is set to the value of  C--   By default the freezing point of water is set to the value of
53  C     the parameter SEAICE_freeze (=-1.96 by default). To use a  C     the parameter SEAICE_freeze (=-1.96 by default). To use a
54  C     simple linear dependence of the freezing point on salinity,  C     simple linear dependence of the freezing point on salinity,
55  C     set the following flag (pressure is assumed to have no effect,  C     set the following flag (pressure is assumed to have no effect,
56  C     which is a good assumption for the top 20 meters). With this  C     which is a good assumption for the top 20 meters). With this
57  C     option defined the parameter SEAICE_freeze has no effect.  C     option defined the parameter SEAICE_freeze has no effect.
58  #undef SEAICE_VARIABLE_FREEZING_POINT  #define SEAICE_VARIABLE_FREEZING_POINT
59    
60  C--   Allow SEAICEuseFlooding, which converts snow to ice if submerged.  C--   Allow SEAICEuseFlooding, which converts snow to ice if submerged.
61  #define ALLOW_SEAICE_FLOODING  #define ALLOW_SEAICE_FLOODING
62    
63    C--   By default sea ice is fresh.  Set following flag for salty ice.
64    #define SEAICE_SALINITY
65    
66  C--   By default the seaice model is discretized on a B-Grid (for  C--   By default the seaice model is discretized on a B-Grid (for
67  C     historical reasons). Define the following flag to use a new  C     historical reasons). Define the following flag to use a new
68  C     (not thoroughly) test version on a C-grid  C     (not thoroughly) test version on a C-grid
# Line 84  C     defining the following flag Line 74  C     defining the following flag
74  #undef SEAICE_ALLOW_EVP  #undef SEAICE_ALLOW_EVP
75  #endif /* SEAICE_CGRID */  #endif /* SEAICE_CGRID */
76    
77    C--   When set use MAX_HEFF to cap sea ice thickness in seaice_growth
78    #define SEAICE_CAP_HEFF
79    
80  #endif /* SEAICE_OPTIONS_H */  #endif /* SEAICE_OPTIONS_H */
81    
82  CEH3 ;;; Local Variables: ***  CEH3 ;;; Local Variables: ***
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