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C $Header: /u/gcmpack/MITgcm/pkg/seaice/SEAICE_OPTIONS.h,v 1.54 2011/12/19 16:22:26 mlosch Exp $ |
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C $Name: $ |
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|
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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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|
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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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|
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#ifdef ALLOW_SEAICE |
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C Package-specific Options & Macros go here |
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|
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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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|
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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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|
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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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|
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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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#define SEAICE_MULTICATEGORY |
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|
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C-- Use the Old version of seaice_growth (close to cvs version 1.70) |
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C otherwise, use the merged version (with some of Ian Fenty s code) |
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#define SEAICE_GROWTH_LEGACY |
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|
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C-- options only available in the merged version (from Ian Fenty s code) |
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#ifndef SEAICE_GROWTH_LEGACY |
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C- to ensure heat conservation in the coupled ocean-seaice system |
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# undef SEAICE_HEAT_CONSERV_FIX |
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C- to switch on/off open-water freezing contribution to thickness tendency: |
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# define SEAICE_DO_OPEN_WATER_GROWTH |
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C- ifdef SEAICE_DO_OPEN_WATER_GROWTH then define SEAICE_DO_OPEN_WATER_MELT |
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C to also allow open-water air-sea heat fluxes melt ice |
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# undef SEAICE_DO_OPEN_WATER_MELT |
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C- to switch on/off ocean heat contribution to seaice cover reduction: |
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# define SEAICE_OCN_MELT_ACT_ON_AREA |
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C- to preclude infinitesimal ice concentrations: |
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# undef ALLOW_PRECLUDE_INFINITESIMAL_AREA |
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#endif |
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|
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C- to use the MCPhee formula in computing ocean/ice fluxes |
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#undef MCPHEE_OCEAN_ICE_HEAT_FLUX |
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|
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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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|
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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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|
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C-- Allow SEAICEuseFlooding, which converts snow to ice if submerged. |
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#define ALLOW_SEAICE_FLOODING |
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|
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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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|
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C-- Track sea ice age. |
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#undef SEAICE_AGE |
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|
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C-- Tracers of ice and/or ice cover. |
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#undef ALLOW_SITRACER |
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#ifdef ALLOW_SITRACER |
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C-- To try avoid 'spontaneous generation' of tracer maxima by advdiff. |
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# define ALLOW_SITRACER_ADVCAP |
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#endif |
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|
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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 |
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C (not thoroughly) test version on a C-grid |
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#define SEAICE_CGRID |
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|
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C-- Only for the C-grid version it is possible to |
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#ifdef SEAICE_CGRID |
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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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|
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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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C-- Defining this flag turns on a FV-discretization of the B-grid LSOR |
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C solver. It is smoother and includes all metric terms, similar to the |
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C C-grid solver. It is here for completeness, but its usefulness is |
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C unclear. |
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# undef SEAICE_LSRBNEW |
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#endif /* SEAICE_CGRID */ |
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|
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C-- When set use MAX_HEFF to cap sea ice thickness in seaice_growth |
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#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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#undef SEAICE_CAP_ICELOAD |
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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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|
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C enable free drift code |
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#define SEAICE_ALLOW_FREEDRIFT |
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|
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#endif /* ALLOW_SEAICE */ |
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#endif /* SEAICE_OPTIONS_H */ |
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|
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CEH3 ;;; Local Variables: *** |
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CEH3 ;;; mode:fortran *** |
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CEH3 ;;; End: *** |
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