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C $Header$ |
C $Header$ |
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C $Name$ |
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C /==========================================================\ |
C *==========================================================* |
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C | SEAICE_OPTIONS.h | |
C | SEAICE_OPTIONS.h | |
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C | o CPP options file for sea ice package. | |
C | o CPP options file for sea ice package. | |
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C |==========================================================| |
C *==========================================================* |
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C | Use this file for selecting options within the sea ice | |
C | Use this file for selecting options within the sea ice | |
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C | package. | |
C | package. | |
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C \==========================================================/ |
C *==========================================================* |
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#ifndef SEAICE_OPTIONS_H |
#ifndef SEAICE_OPTIONS_H |
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#define SEAICE_OPTIONS_H |
#define SEAICE_OPTIONS_H |
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C using variable SEAICEuseDYNAMICS. |
C using variable SEAICEuseDYNAMICS. |
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#define SEAICE_ALLOW_DYNAMICS |
#define SEAICE_ALLOW_DYNAMICS |
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C-- By default, pkg/seaice defines forcing variable internally, in |
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C SEAICE_FFIELDS.h, and reads them in from files. When CPP option |
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C SEAICE_EXTERNAL_FORCING is defined, the above forcing variables |
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C are defined and provided by an external package. At present this |
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C option is hardwired for pkg/exf and the variables are passed using |
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C include file exf_fields.h. |
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#define SEAICE_EXTERNAL_FORCING |
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#ifdef SEAICE_EXTERNAL_FORCING |
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cph#include "EXF_OPTIONS.h" |
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#endif /* SEAICE_EXTERNAL_FORCING */ |
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C-- By default, the sea-ice package uses its own integrated bulk |
C-- By default, the sea-ice package uses its own integrated bulk |
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C formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over |
C formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over |
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C open-ocean. When this flag is set, these variables are computed |
C open-ocean. When this flag is set, these variables are computed |
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C from those generated with the default 2-category model. |
C from those generated with the default 2-category model. |
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C Therefore it is not possible to switch between the two |
C Therefore it is not possible to switch between the two |
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C in the middle of an integration. |
C in the middle of an integration. |
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#undef SEAICE_MULTILEVEL |
#define SEAICE_MULTICATEGORY |
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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) |
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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) |
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C This is a placeholder until a more physically-sensible |
#define SEAICE_GROWTH_LEGACY |
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C stable solution is developed. Apparently ocean stress |
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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) |
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C Arctic Ocean configurations. This temporary solution |
#ifndef SEAICE_GROWTH_LEGACY |
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C also corresponds to that adopted by CCSM-2. For the |
C- to switch on/off open-water freezing contribution to thickness tendency: |
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C adventurous user who requires ice-modified stress, |
#define SEAICE_DO_OPEN_WATER_GROWTH |
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C following options are available. |
C- to switch on/off ocean heat contribution to seaice cover reduction: |
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#undef SEAICE_ORIGINAL_BAD_ICE_STRESS |
#define SEAICE_OCN_MELT_ACT_ON_AREA |
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#undef SEAICE_TEST_ICE_STRESS_1 |
#endif |
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C-- Use the Old version of seaice_solve4temp (formerly seaice_budget_ice) |
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C otherwise, use Ian Fenty s version |
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#define SEAICE_SOLVE4TEMP_LEGACY |
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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 |
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C the parameter SEAICE_freeze (=-1.96 by default). To use a |
C the parameter SEAICE_freeze (=-1.96 by default). To use a |
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C simple linear dependence of the freezing point on salinity, |
C simple linear dependence of the freezing point on salinity, |
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C set the following flag (pressure is assumed to have no effect, |
C set the following flag (pressure is assumed to have no effect, |
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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 |
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C option defined the parameter SEAICE_freeze has no effect. |
C option defined the parameter SEAICE_freeze has no effect. |
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#undef SEAICE_VARIABLE_FREEZING_POINT |
#undef SEAICE_VARIABLE_FREEZING_POINT |
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C-- By default the seaice model is discretized on a B-Grid (for |
C-- Allow SEAICEuseFlooding, which converts snow to ice if submerged. |
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#define ALLOW_SEAICE_FLOODING |
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C-- By default sea ice is fresh. Set following flag for salty ice. |
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#define SEAICE_VARIABLE_SALINITY |
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C-- Track sea ice age. |
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#undef SEAICE_AGE |
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C-- By default the seaice model is discretized on a B-Grid (for |
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C historical reasons). Define the following flag to use a new |
C historical reasons). Define the following flag to use a new |
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C (not thoroughly) test version on a C-grid |
C (not thoroughly) test version on a C-grid |
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#define SEAICE_CGRID |
#define SEAICE_CGRID |
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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 |
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C defining the following flag |
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#ifdef SEAICE_CGRID |
#ifdef SEAICE_CGRID |
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#undef SEAICE_ALLOW_EVP |
C enable EVP code by defining the following flag |
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# define SEAICE_ALLOW_EVP |
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# ifdef SEAICE_ALLOW_EVP |
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C-- When set use SEAICE_zetaMin and SEAICE_evpDampC to limit |
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C-- viscosities from below and above in seaice_evp |
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C-- not necessary, and not recommended |
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# undef SEAICE_ALLOW_CLIPZETA |
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# endif /* SEAICE_ALLOW_EVP */ |
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C allow the truncated ellipse rheology (runtime flag SEAICEuseTEM) |
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# undef SEAICE_ALLOW_TEM |
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#else /* not SEAICE_CGRID, but old B-grid */ |
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C-- By default for B-grid dynamics solver wind stress under sea-ice is |
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C set to the same value as it would be if there was no sea-ice. |
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C Define following CPP flag for B-grid ice-ocean stress coupling. |
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# define SEAICE_BICE_STRESS |
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C-- By default for B-grid dynamics solver surface tilt is obtained |
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C indirectly via geostrophic velocities. Define following CPP |
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C in order to use ETAN instead. |
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# define EXPLICIT_SSH_SLOPE |
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#endif /* SEAICE_CGRID */ |
#endif /* SEAICE_CGRID */ |
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C-- Seaice flooding |
C-- When set use MAX_HEFF to cap sea ice thickness in seaice_growth |
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#define ALLOW_SEAICE_FLOODING |
#undef SEAICE_CAP_HEFF |
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C-- When set limit the Ice-Loading to mass of 1/5 of Surface ocean grid-box |
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C-- By default sea ice is fresh. Set following flag for salty ice. |
#undef SEAICE_CAP_ICELOAD |
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#define SEAICE_SALINITY |
C-- When set use SEAICE_clipVelocties = .true., to clip U/VICE at 40cm/s, |
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C-- not recommended |
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#undef SEAICE_ALLOW_CLIPVELS |
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C enable free drift code |
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#undef SEAICE_ALLOW_FREEDRIFT |
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#endif /* SEAICE_OPTIONS_H */ |
#endif /* SEAICE_OPTIONS_H */ |
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