/[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 1.62 by gforget, Sat Mar 3 03:33:02 2012 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
14  #include "PACKAGES_CONFIG.h"  #include "PACKAGES_CONFIG.h"
15  #include "CPP_OPTIONS.h"  #include "CPP_OPTIONS.h"
16    
17    #ifdef ALLOW_SEAICE
18    C     Package-specific Options & Macros go here
19    
20  C--   Write "text-plots" of certain fields in STDOUT for debugging.  C--   Write "text-plots" of certain fields in STDOUT for debugging.
21  #undef SEAICE_DEBUG  #undef SEAICE_DEBUG
22    
# Line 40  C     Therefore it is not possible to sw Line 43  C     Therefore it is not possible to sw
43  C     in the middle of an integration.  C     in the middle of an integration.
44  #undef SEAICE_MULTICATEGORY  #undef SEAICE_MULTICATEGORY
45    
46  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)
47  C     the parameter SEAICE_freeze (=-1.96 by default). To use a  C     otherwise, use the merged version (with some of Ian Fenty s code)
48  C     simple linear dependence of the freezing point on salinity,  #define SEAICE_GROWTH_LEGACY
49  C     set the following flag (pressure is assumed to have no effect,  
50  C     which is a good assumption for the top 20 meters). With this  C--   Since the missing sublimation term is now included
51  C     option defined the parameter SEAICE_freeze has no effect.  C     this flag is needed for backward compatibility
52  #undef SEAICE_VARIABLE_FREEZING_POINT  #undef SEAICE_DISABLE_SUBLIM
53    
54  C--   Allow SEAICEuseFlooding, which converts snow to ice if submerged.  C--   Suspected missing term in coupled ocn-ice heat budget (to be further tested)
55  #define ALLOW_SEAICE_FLOODING  #define SEAICE_DISABLE_HEATCONSFIX
56    
57    C--   options only available in the merged version
58    #ifndef SEAICE_GROWTH_LEGACY
59    C-    to ensure heat conservation in the coupled ocean-seaice system
60    # undef SEAICE_HEAT_CONSERV_FIX
61    C-    to preclude infinitesimal ice concentrations:
62    # undef ALLOW_PRECLUDE_INFINITESIMAL_AREA
63    #endif
64    
65    C--   The freezing point of water is a simple linear dependence to salinity.
66    C     The flag below is now obsolete, but kept to ease the transition
67    C     from the old constant freezing point default (see seaice_check.F).
68    #define SEAICE_VARIABLE_FREEZING_POINT
69    
70    C--   The flags below are obsolete, but kept to ease the transition
71    C     from the old default to the new one (see seaice_check.F).
72    #define MCPHEE_OCEAN_ICE_HEAT_FLUX
73    #define GRADIENT_MIXED_LAYER_TURBULENCE_FACTOR
74    
75  C--   By default sea ice is fresh.  Set following flag for salty ice.  C--   By default sea ice is fresh.  Set following flag for salty ice.
76  #undef SEAICE_SALINITY  #undef SEAICE_VARIABLE_SALINITY
77    
78  C--   Track sea ice age.  C--   Tracers of ice and/or ice cover.
79  #undef SEAICE_AGE  #undef ALLOW_SITRACER
80    #ifdef ALLOW_SITRACER
81    C--   To try avoid 'spontaneous generation' of tracer maxima by advdiff.
82    # define ALLOW_SITRACER_ADVCAP
83    #endif
84    
85  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
86  C     historical reasons). Define the following flag to use a new  C     historical reasons). Define the following flag to use a new
87  C     (not thoroughly) test version on a C-grid  C     (not thoroughly) test version on a C-grid
88  #define SEAICE_CGRID  #define SEAICE_CGRID
89    
90  C--   Only for the C-grid version it is possible to  C--   Only for the C-grid version it is possible to
91  #ifdef SEAICE_CGRID  #ifdef SEAICE_CGRID
92  C     enable EVP code by defining the following flag  C     enable EVP code by defining the following flag
93  #define SEAICE_ALLOW_EVP  # define SEAICE_ALLOW_EVP
94  #ifdef SEAICE_ALLOW_EVP  # ifdef SEAICE_ALLOW_EVP
95  C--   When set use SEAICE_zetaMin and SEAICE_evpDampC to limit  C--   When set use SEAICE_zetaMin and SEAICE_evpDampC to limit
96  C--   viscosities from below and above in seaice_evp  C--   viscosities from below and above in seaice_evp
97  C--   not necessary, and not recommended  C--   not necessary, and not recommended
98  #undef SEAICE_ALLOW_CLIPZETA  #  undef SEAICE_ALLOW_CLIPZETA
99  #endif /* SEAICE_ALLOW_EVP */  # endif /* SEAICE_ALLOW_EVP */
100  C     allow the truncated ellipse rheology (runtime flag SEAICEuseTEM)  C     allow the truncated ellipse rheology (runtime flag SEAICEuseTEM)
101  #undef SEAICE_ALLOW_TEM  # undef SEAICE_ALLOW_TEM
102  #else /* not SEAICE_CGRID, but old B-grid */  #else /* not SEAICE_CGRID, but old B-grid */
103  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
104  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.
105  C     Define following CPP flag for B-grid ice-ocean stress coupling.  C     Define following CPP flag for B-grid ice-ocean stress coupling.
106  #define SEAICE_BICE_STRESS  # define SEAICE_BICE_STRESS
107    
108  C--   By default for B-grid dynamics solver surface tilt is obtained  C--   By default for B-grid dynamics solver surface tilt is obtained
109  C     indirectly via geostrophic velocities. Define following CPP  C     indirectly via geostrophic velocities. Define following CPP
110  C     in order to use ETAN instead.  C     in order to use ETAN instead.
111  #define EXPLICIT_SSH_SLOPE  # define EXPLICIT_SSH_SLOPE
112    C--   Defining this flag turns on a FV-discretization of the B-grid LSOR
113    C     solver. It is smoother and includes all metric terms, similar to the
114    C     C-grid solver. It is here for completeness, but its usefulness is
115    C     unclear.
116    # undef SEAICE_LSRBNEW
117  #endif /* SEAICE_CGRID */  #endif /* SEAICE_CGRID */
118    
119  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
120  #undef SEAICE_CAP_HEFF  #undef SEAICE_CAP_HEFF
121    C--   When set limit the Ice-Loading to mass of 1/5 of Surface ocean grid-box
122    #undef SEAICE_CAP_ICELOAD
123  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,
124  C--   not recommended  C--   not recommended
125  #undef SEAICE_ALLOW_CLIPVELS  #undef SEAICE_ALLOW_CLIPVELS
126    C--   When set cap the sublimation latent heat flux in solve4temp
127    C     according to the available amount of ice+snow. Otherwise this
128    C     term is treated like all of the others -- residuals heat and
129    C     fw stocks are passed to the ocean at the end of seaice_growth
130    C     in a conservative manner. SEAICE_CAP_SUBLIM is not needed
131    C     as of now, but kept just in case.
132    #undef SEAICE_CAP_SUBLIM
133    
134    C     enable free drift code
135    #undef SEAICE_ALLOW_FREEDRIFT
136    
137    #endif /* ALLOW_SEAICE */
138  #endif /* SEAICE_OPTIONS_H */  #endif /* SEAICE_OPTIONS_H */
139    
140  CEH3 ;;; Local Variables: ***  CEH3 ;;; Local Variables: ***
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