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C $Header: /u/gcmpack/MITgcm/pkg/seaice/SEAICE_OPTIONS.h,v 1.13 2006/01/27 20:18:37 mlosch Exp $ |
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C /==========================================================\ |
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C | SEAICE_OPTIONS.h | |
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C | o CPP options file for sea ice package. | |
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C |==========================================================| |
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C | Use this file for selecting options within the sea ice | |
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C | package. | |
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C \==========================================================/ |
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#ifndef SEAICE_OPTIONS_H |
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#define SEAICE_OPTIONS_H |
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#include "PACKAGES_CONFIG.h" |
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#include "CPP_OPTIONS.h" |
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C-- Write "text-plots" of certain fields in STDOUT for debugging. |
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#undef SEAICE_DEBUG |
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C-- Allow sea-ice dynamic code. |
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C This option is provided to allow use of TAMC |
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C on the thermodynamics component of the code only. |
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C Sea-ice dynamics can also be turned off at runtime |
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C using variable SEAICEuseDYNAMICS. |
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#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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#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 |
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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 |
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C in a separate external package, for example, pkg/exf, and then |
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C modified for sea-ice effects by pkg/seaice. |
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#define SEAICE_EXTERNAL_FLUXES |
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C-- By default, the sea-ice package uses 2-category thermodynamics. |
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C When this flag is set, an 8-category calculation of ice |
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C thermodynamics is carried out in groatb.F |
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C Note the pickup_seaice.* generated by this option differ |
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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 |
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C in the middle of an integration. |
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#undef SEAICE_MULTILEVEL |
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C-- By default cdm wind stress under sea-ice is set to the |
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C same value as it would be if there was no sea-ice. |
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C This is a placeholder until a more physically-sensible |
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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 |
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C Arctic Ocean configurations. This temporary solution |
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C also corresponds to that adopted by CCSM-2. For the |
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C adventurous user who requires ice-modified stress, |
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C following options are available. |
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#undef SEAICE_ORIGINAL_BAD_ICE_STRESS |
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#undef SEAICE_TEST_ICE_STRESS_1 |
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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 |
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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, |
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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. |
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#undef SEAICE_VARIABLE_FREEZING_POINT |
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#define SEAICE_CGRID |
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#define SEAICE_ALLOW_EVP |
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#endif /* SEAICE_OPTIONS_H */ |
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CEH3 ;;; Local Variables: *** |
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CEH3 ;;; mode:fortran *** |
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CEH3 ;;; End: *** |
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