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| 7 | 
 Steps  to add tide boundary conditions  to regional MITgcm  | 
 Steps  to add tide boundary conditions  to regional MITgcm  | 
| 8 | 
 0) Download the Circum-Antarctic Tide (CATS) Solution (Padman et al. 2002) | 
 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. | 
    from Earth and Space Research,   http://www.esr.org/~padman/cats2008b/  | 
| 10 | 
    Modify CAT directory in test_tide_bc.m  | 
    Modify CATS directory in test_tide_bc.m    | 
| 11 | 
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    Download the TMD2.03 software for extracting the tidal solution from  | 
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    http://www.esr.org.  | 
| 13 | 
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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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| 16 | 
 1) use create_bc_grid.m (test_bc_grid.m) to generate bc grid files.  | 
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| 17 | 
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 1) use create_bc_grid.m (called by test_bc_grid.m) to generate bc grid files.  | 
| 18 | 
    create_bc_grid.m will generate files with names like  | 
    create_bc_grid.m will generate files with names like  | 
| 19 | 
    bdry_grid_[snwe].mat for south, north, west, and east boundary.   | 
    bdry_grid_[snwe].mat for south, north, west, and east boundary.   | 
| 20 | 
    This script needs a directory path for MITgcm domain related files,  | 
    This script needs a directory path for MITgcm domain related files,  | 
| 21 | 
    especially YC.data, XC.data, hFacC.data, AngleCS.data, AngleSN.data.  | 
    specifically  YC.data, XC.data, hFacC.data, AngleCS.data, AngleSN.data.  | 
| 22 | 
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| 23 | 
 2) use test_tide_bc.m to generate tidal bc files which calls  | 
 2) use test_tide_bc.m to generate tidal bc files which calls  | 
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    create_tide_bc_4bdry.m  | 
    create_tide_bc_second.m  | 
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    or dummy tidal bc files (zero amplitde and phase) for land boundary  | 
    or dummy tidal bc files (zero amplitude and phase, tide_bc_empty.m)  | 
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    if there is such a need.  | 
    for land boundary if there is such a need.  | 
| 27 | 
  | 
  | 
| 28 | 
    create_tide_bc_second.m will generate tidal bounday files with names  | 
    create_tide_bc_second.m will generate tidal boundary files with names  | 
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    like OB[SNWE]{am ph}.seaice_obcs.   | 
    like OB[SNWE]{am ph}.seaice_obcs.   | 
| 30 | 
    The tidal current and phase will be used in  obcs_add_tides.F.     | 
    The tidal current and phase will be used in  obcs_add_tides.F.     | 
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