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The scripts in this directory are for adding tidal boundary condition |
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to a regional configuration of MITgcm. |
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|
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The scripts are tested for Pine Island Model |
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and also for verification/seaice_obcs using specified tidal boundary file. |
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Steps to add tide boundary conditions to regional MITgcm |
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0) Download the Circum-Antarctic Tide (CATS) Solution (Padman et al. 2002) |
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from Earth and Space Research, http://www.esr.org/~padman/cats2008b/ |
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Modify CATS directory in test_tide_bc.m |
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Download the TMD2.03 software for extracting the tidal solution from |
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http://www.esr.org. |
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Modifications are needed in the original /TMD2.03/tmd_extract_HC.m in order |
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to have the correct path of tidal solution as shown in the sample_tmd_extract_HC.m. |
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Use CATS2008b not CAT2008a since CATS200a is not on north-south east-west coordinate |
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1) use create_bc_grid.m (called by test_bc_grid.m) to generate bc grid files. |
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create_bc_grid.m will generate files with names like |
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bdry_grid_[snwe].mat for south, north, west, and east boundary. |
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This script needs a directory path for MITgcm domain related files, |
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specifically YC.data, XC.data, hFacC.data, AngleCS.data, AngleSN.data. |
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|
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2) use test_tide_bc.m to generate tidal bc files which calls |
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create_tide_bc_second.m |
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or dummy tidal bc files (zero amplitude and phase, tide_bc_empty.m) |
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for land boundary if there is such a need. |
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|
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create_tide_bc_second.m will generate tidal boundary files with names |
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like OB[SNWE]{am ph}.seaice_obcs. |
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The tidal current and phase will be used in obcs_add_tides.F. |
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3) Modify MITgcm configuration |
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3.1) ALLOW_OBCS_TIDES in OBCS_OPTIONS.h |
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3.2) OBCS_PARAMS.h (tidalComponents = ??, number of tidal constituent to be included.) |
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3.3) data.obcs as following |
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The number of tidal constituents to be included and their period and |
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order should be consistent with their order in tidal current amplitude |
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and phase files, OB?amFile and OB?phFile. |
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useOBCStides = .TRUE. |
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tidalperiod = ... |
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OBSamFile = ... |
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OBNamFile = ... |
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OBWamFile = ... |
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OBEamFile = ... |
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OBSphFile = ... |
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OBNphFile = ... |
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OBWphFile = ... |
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OBEphFile = ... |
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CAT Reference |
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Padman, L., H. A. Fricker, R. Coleman, S. Howard, and S. Erofeeva, 2002: A new tidal model for the |
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Antarctic ice shelves and seas, Ann. Glaciol., 34, 247-254. |
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|
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XC WANG 02 Apr 2013 |
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XC WANG 25 Mar 2013 |
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XC WANG 07 Feb. 2013 |
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XC WANG 20 Dec. 2012 |
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xiaochun.wang@jpl.nasa.gov |
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