/[MITgcm]/MITgcm/pkg/seaice/SEAICE_OPTIONS.h
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revision 1.37 by mlosch, Mon Oct 26 08:38:53 2009 UTC revision 1.44 by gforget, Thu Feb 10 12:01:18 2011 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2  C $Name$  C $Name$
3    
4  C     /==========================================================\  C     *==========================================================*
5  C     | SEAICE_OPTIONS.h                                         |  C     | SEAICE_OPTIONS.h                                         |
6  C     | o CPP options file for sea ice package.                  |  C     | o CPP options file for sea ice package.                  |
7  C     |==========================================================|  C     *==========================================================*
8  C     | Use this file for selecting options within the sea ice   |  C     | Use this file for selecting options within the sea ice   |
9  C     | package.                                                 |  C     | package.                                                 |
10  C     \==========================================================/  C     *==========================================================*
11    
12  #ifndef SEAICE_OPTIONS_H  #ifndef SEAICE_OPTIONS_H
13  #define SEAICE_OPTIONS_H  #define SEAICE_OPTIONS_H
# Line 40  C     Therefore it is not possible to sw Line 40  C     Therefore it is not possible to sw
40  C     in the middle of an integration.  C     in the middle of an integration.
41  #undef SEAICE_MULTICATEGORY  #undef SEAICE_MULTICATEGORY
42    
43  C--   By default the freezing point of water is set to the value of  C--   Use the Old version of seaice_growth (close to cvs version 1.70)
44    C     otherwise, use the merged version (with some of Ian Fenty s code)
45    #define SEAICE_GROWTH_LEGACY
46    
47    C--   options only available in the merged version (from Ian Fenty s code)
48    #ifndef SEAICE_GROWTH_LEGACY
49    C-    to switch on/off open-water freezing contribution to thickness tendency:
50    #define SEAICE_DO_OPEN_WATER_GROWTH
51    C-    ifdef SEAICE_DO_OPEN_WATER_GROWTH then define SEAICE_DO_OPEN_WATER_MELT
52    C     to also allow open-water air-sea heat fluxes melt ice
53    #undef SEAICE_DO_OPEN_WATER_MELT
54    C-    to switch on/off ocean heat contribution to seaice cover reduction:
55    #define SEAICE_OCN_MELT_ACT_ON_AREA
56    #endif
57    
58    C-    to use the MCPhee formula in computing ocean/ice fluxes
59    #undef MCPHEE_OCEAN_ICE_HEAT_FLUX
60    
61    C--   Use the Old version of seaice_solve4temp (formerly seaice_budget_ice)
62    C     otherwise, use Ian Fenty s version
63    #define SEAICE_SOLVE4TEMP_LEGACY
64    
65    C--   By default the freezing point of water is set to the value of
66  C     the parameter SEAICE_freeze (=-1.96 by default). To use a  C     the parameter SEAICE_freeze (=-1.96 by default). To use a
67  C     simple linear dependence of the freezing point on salinity,  C     simple linear dependence of the freezing point on salinity,
68  C     set the following flag (pressure is assumed to have no effect,  C     set the following flag (pressure is assumed to have no effect,
69  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
70  C     option defined the parameter SEAICE_freeze has no effect.  C     option defined the parameter SEAICE_freeze has no effect.
# Line 55  C--   By default sea ice is fresh.  Set Line 77  C--   By default sea ice is fresh.  Set
77  #undef SEAICE_SALINITY  #undef SEAICE_SALINITY
78    
79  C--   Track sea ice age.  C--   Track sea ice age.
80    C     By default sea ice age is associated with ice area.
81    C     Define SEAICE_AGE_VOL to associate age with volume.
82  #undef SEAICE_AGE  #undef SEAICE_AGE
83    #ifdef SEAICE_AGE
84    # undef SEAICE_AGE_VOL
85    #endif
86    
87  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
88  C     historical reasons). Define the following flag to use a new  C     historical reasons). Define the following flag to use a new
89  C     (not thoroughly) test version on a C-grid  C     (not thoroughly) test version on a C-grid
90  #define SEAICE_CGRID  #define SEAICE_CGRID
91    
92  C--   Only for the C-grid version it is possible to  C--   Only for the C-grid version it is possible to
93  #ifdef SEAICE_CGRID  #ifdef SEAICE_CGRID
94  C     enable EVP code by defining the following flag  C     enable EVP code by defining the following flag
95  #define SEAICE_ALLOW_EVP  # define SEAICE_ALLOW_EVP
96  #ifdef SEAICE_ALLOW_EVP  # ifdef SEAICE_ALLOW_EVP
97  C--   When set use SEAICE_zetaMin and SEAICE_evpDampC to limit  C--   When set use SEAICE_zetaMin and SEAICE_evpDampC to limit
98  C--   viscosities from below and above in seaice_evp  C--   viscosities from below and above in seaice_evp
99  C--   not necessary, and not recommended  C--   not necessary, and not recommended
100  #undef SEAICE_ALLOW_CLIPZETA  #  undef SEAICE_ALLOW_CLIPZETA
101  #endif /* SEAICE_ALLOW_EVP */  # endif /* SEAICE_ALLOW_EVP */
102  C     allow the truncated ellipse rheology (runtime flag SEAICEuseTEM)  C     allow the truncated ellipse rheology (runtime flag SEAICEuseTEM)
103  #undef SEAICE_ALLOW_TEM  # undef SEAICE_ALLOW_TEM
104  #else /* not SEAICE_CGRID, but old B-grid */  #else /* not SEAICE_CGRID, but old B-grid */
105  C--   By default for B-grid dynamics solver wind stress under sea-ice is  C--   By default for B-grid dynamics solver wind stress under sea-ice is
106  C     set to the 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.
107  C     Define following CPP flag for B-grid ice-ocean stress coupling.  C     Define following CPP flag for B-grid ice-ocean stress coupling.
108  #define SEAICE_BICE_STRESS  # define SEAICE_BICE_STRESS
109    
110  C--   By default for B-grid dynamics solver surface tilt is obtained  C--   By default for B-grid dynamics solver surface tilt is obtained
111  C     indirectly via geostrophic velocities. Define following CPP  C     indirectly via geostrophic velocities. Define following CPP
112  C     in order to use ETAN instead.  C     in order to use ETAN instead.
113  #define EXPLICIT_SSH_SLOPE  # define EXPLICIT_SSH_SLOPE
   
114  #endif /* SEAICE_CGRID */  #endif /* SEAICE_CGRID */
115    
116  C--   When set use MAX_HEFF to cap sea ice thickness in seaice_growth  C--   When set use MAX_HEFF to cap sea ice thickness in seaice_growth
117  #undef SEAICE_CAP_HEFF  #undef SEAICE_CAP_HEFF
118    C--   When set limit the Ice-Loading to mass of 1/5 of Surface ocean grid-box
119    #undef SEAICE_CAP_ICELOAD
120  C--   When set use SEAICE_clipVelocties = .true., to clip U/VICE at 40cm/s,  C--   When set use SEAICE_clipVelocties = .true., to clip U/VICE at 40cm/s,
121  C--   not recommended  C--   not recommended
122  #undef SEAICE_ALLOW_CLIPVELS  #undef SEAICE_ALLOW_CLIPVELS
123    
124    C     enable free drift code
125    #undef SEAICE_ALLOW_FREEDRIFT
126    
127  #endif /* SEAICE_OPTIONS_H */  #endif /* SEAICE_OPTIONS_H */
128    
129  CEH3 ;;; Local Variables: ***  CEH3 ;;; Local Variables: ***
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