| 1 |
C $Header: /u/gcmpack/MITgcm_contrib/high_res_cube/code-mods/SEAICE_OPTIONS.h,v 1.11 2007/06/22 20:16:51 dimitri Exp $ |
| 2 |
|
| 3 |
C /==========================================================\ |
| 4 |
C | SEAICE_OPTIONS.h | |
| 5 |
C | o CPP options file for sea ice package. | |
| 6 |
C |==========================================================| |
| 7 |
C | Use this file for selecting options within the sea ice | |
| 8 |
C | package. | |
| 9 |
C \==========================================================/ |
| 10 |
|
| 11 |
#ifndef SEAICE_OPTIONS_H |
| 12 |
#define SEAICE_OPTIONS_H |
| 13 |
#include "PACKAGES_CONFIG.h" |
| 14 |
#include "CPP_OPTIONS.h" |
| 15 |
|
| 16 |
C-- Write "text-plots" of certain fields in STDOUT for debugging. |
| 17 |
#undef SEAICE_DEBUG |
| 18 |
|
| 19 |
C-- Allow sea-ice dynamic code. |
| 20 |
C This option is provided to allow use of TAMC |
| 21 |
C on the thermodynamics component of the code only. |
| 22 |
C Sea-ice dynamics can also be turned off at runtime |
| 23 |
C using variable SEAICEuseDYNAMICS. |
| 24 |
#define SEAICE_ALLOW_DYNAMICS |
| 25 |
|
| 26 |
C-- By default, pkg/seaice defines forcing variable internally, in |
| 27 |
C SEAICE_FFIELDS.h, and reads them in from files. When CPP option |
| 28 |
C SEAICE_EXTERNAL_FORCING is defined, the above forcing variables |
| 29 |
C are defined and provided by an external package. At present this |
| 30 |
C option is hardwired for pkg/exf and the variables are passed using |
| 31 |
C include file EXF_FIELDS.h (=> cannot be defined without pkg/EXF ) |
| 32 |
#define SEAICE_EXTERNAL_FORCING |
| 33 |
#ifndef ALLOW_EXF |
| 34 |
# undef SEAICE_EXTERNAL_FORCING |
| 35 |
#endif |
| 36 |
|
| 37 |
#ifdef SEAICE_EXTERNAL_FORCING |
| 38 |
# include "EXF_OPTIONS.h" |
| 39 |
C-- By default, the sea-ice package uses its own integrated bulk |
| 40 |
C formulae to compute fluxes (fu, fv, EmPmR, Qnet, and Qsw) over |
| 41 |
C open-ocean. When this flag is set, these variables are computed |
| 42 |
C in a separate external package, for example, pkg/exf, and then |
| 43 |
C modified for sea-ice effects by pkg/seaice. |
| 44 |
# define SEAICE_EXTERNAL_FLUXES |
| 45 |
|
| 46 |
#else /* SEAICE_EXTERNAL_FORCING */ |
| 47 |
C- current implementation requires those options to be set: |
| 48 |
# undef SEAICE_EXTERNAL_FLUXES |
| 49 |
# define ALLOW_ATM_TEMP |
| 50 |
# define ALLOW_DOWNWARD_RADIATION |
| 51 |
# define ALLOW_RUNOFF |
| 52 |
|
| 53 |
#endif /* SEAICE_EXTERNAL_FORCING */ |
| 54 |
|
| 55 |
#ifdef ALLOW_OBCS |
| 56 |
C- OBCS information is needed to define the correct sea ice mask. |
| 57 |
#include "OBCS_OPTIONS.h" |
| 58 |
#endif /* ALLOW_OBCS */ |
| 59 |
|
| 60 |
C-- By default, the sea-ice package uses 2-category thermodynamics. |
| 61 |
C When this flag is set, an 8-category calculation of ice |
| 62 |
C thermodynamics is carried out in groatb.F |
| 63 |
C Note the pickup_seaice.* generated by this option differ |
| 64 |
C from those generated with the default 2-category model. |
| 65 |
C Therefore it is not possible to switch between the two |
| 66 |
C in the middle of an integration. |
| 67 |
#define SEAICE_MULTICATEGORY |
| 68 |
|
| 69 |
C-- By default cdm wind stress under sea-ice is set to the |
| 70 |
C same value as it would be if there was no sea-ice. |
| 71 |
C This is a placeholder until a more physically-sensible |
| 72 |
C stable solution is developed. Apparently ocean stress |
| 73 |
C that is based on sea-ice velocity can cause trouble in |
| 74 |
C Arctic Ocean configurations. This temporary solution |
| 75 |
C also corresponds to that adopted by CCSM-2. For the |
| 76 |
C adventurous user who requires ice-modified stress, |
| 77 |
C following options are available. |
| 78 |
#undef SEAICE_ORIGINAL_BAD_ICE_STRESS |
| 79 |
#undef SEAICE_TEST_ICE_STRESS_1 |
| 80 |
|
| 81 |
C-- By default the freezing point of water is set to the value of |
| 82 |
C the parameter SEAICE_freeze (=-1.96 by default). To use a |
| 83 |
C simple linear dependence of the freezing point on salinity, |
| 84 |
C set the following flag (pressure is assumed to have no effect, |
| 85 |
C which is a good assumption for the top 20 meters). With this |
| 86 |
C option defined the parameter SEAICE_freeze has no effect. |
| 87 |
#define SEAICE_VARIABLE_FREEZING_POINT |
| 88 |
|
| 89 |
C-- Allow SEAICEuseFlooding, which converts snow to ice if submerged. |
| 90 |
#define ALLOW_SEAICE_FLOODING |
| 91 |
|
| 92 |
C-- By default the seaice model is discretized on a B-Grid (for |
| 93 |
C historical reasons). Define the following flag to use a new |
| 94 |
C (not thoroughly) test version on a C-grid |
| 95 |
#define SEAICE_CGRID |
| 96 |
|
| 97 |
C-- Only for the C-grid version it is possible to enable EVP code by |
| 98 |
C defining the following flag |
| 99 |
#ifdef SEAICE_CGRID |
| 100 |
#undef SEAICE_ALLOW_EVP |
| 101 |
#endif /* SEAICE_CGRID */ |
| 102 |
|
| 103 |
C-- When set use MAX_HEFF to cap sea ice thickness in seaice_growth |
| 104 |
#define SEAICE_CAP_HEFF |
| 105 |
|
| 106 |
#endif /* SEAICE_OPTIONS_H */ |
| 107 |
|
| 108 |
CEH3 ;;; Local Variables: *** |
| 109 |
CEH3 ;;; mode:fortran *** |
| 110 |
CEH3 ;;; End: *** |
Parent Directory
| 
Revision Log
| 
Revision Graph