=== +-======-+ 
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#######################################################################
#       Regridding to Ganymed From Fortuna or MERRA Restarts
#######################################################################

Note:  Ganymed-1_0_M:
       --------------
       Contains tile files which treat the Great Lakes and Capsian Sea as LAKE,
       and therefore uses the GEOS5 Lake (M)odel to update its surface temperature.
       This boundary area would be approprate when running with Reynolds 1-deg SST 
       data which has no LAKE information.

       Ganymed-1_0_D:
       --------------
       Contains tile files which treat the Great Lakes and Capsian Sea as OCEAN, 
       and therefore uses the Input SST (D)ata to update its surface temperature.  
       This boundary area would be approprate when running with OSTIA 1/8-deg SST 
       data which has information over LAKEs.

MERRA
-----

To create Ganymed-1_0_(M or D) Restarts from MERRA, you must first regrid the MERRA restarts
to a set of 1/2-deg Lat/Lon Fortuna-2_1 restarts.  This is done so that a proper scaling
of the CATCH restarts may be made (from Fortuna to Ganymed). So ...

1) Run Regrid with the OUTPUT Boundary Condition Tag (-bctago) set to: Fortuna-2_1
               and the OUTPUT Horizontal Resolution set to 1/2-deg (Horizontal Resolution Code: d)

2) Continue with steps to create Ganymed Restarts from Fortuna.


Fortuna
-------

To create Ganymed-1_0_(M or D) Restarts from Fortuna Tags, you must first regrid the Fortuna restarts
to an equivalent Ganymed set using the Ganymed-1_0_m1 OUTPUT Boundary Condition Tag.  The REGRID 
utility will then automatically scale the resulting CATCH restarts to be consistent with Ganymed-1_0 
Land parameters.  From here you may then regrid to any valid Ganymed-1_0 configuration. So ...

1) Run Regrid with the OUTPUT Boundary Condition Tag (-bctago) set to: Ganymed-1_0_m1
               and the OUTPUT Horizontal Resolution identical to the Input Horizontal Resolution.

2) Pointing to the OUTPUT Restarts created from (1),
   Run Regrid again with the INPUT Boundary Condition Tag (-bctagi) set to: Ganymed-1_0_m1
   and the OUTPUT Horizontal Resolution and Boundary Condition Tag be set to any valid Ganymed-1_0 option.



Examples
--------
The following examples show REQUIRED command line options for regridding.  You may 'cut-and-paste'
each line to begin the multi-step process.  Along the way, the regrid script will query the USER 
for other user-defined options.

1) MERRA to Ganymed-1_0_(M or D) (3-Step Process)
   -------------------------------------

  Step_1) regrid -in merra -bctago Fortuna-2_1 -im 576 -jm 361
  Step_2) regrid           -bctagi Fortuna-2_1 -im 576 -jm 361 -bctago Ganymed-1_0_m1 -oceano o1
  Step_3) regrid                                               -bctagi Ganymed-1_0_m1 -oceani o1


2) Fortuna to Ganymed-1_0_(M or D) (2-Step Process)
   ---------------------------------------

  Step_1) regrid -bctagi Fortuna-2_1 -bctago Ganymed-1_0_m1 -oceano o1
  Step_2) regrid                     -bctagi Ganymed-1_0_m1 -oceani o1


FYI: GEOSadas Boundary Condition Tags 
-------------------------------------
     Ganymed-1_0_D  (GEOSadas-5_9_1 with Date-Driven Great_Lakes)
     Ganymed-1_0_M  (GEOSadas-5_9_1 with Model-Based Great_Lakes)
     Ganymed-1_0_m2 (GEOSadas-5_9_0 with Date-Driven Great_Lakes)
     Ganymed-1_0_m1 (GEOSadas-5_9_0 with Model-Based Great_Lakes)
     Ganymed-1_0    (GEOSadas-5_8_0)
     Fortuna-2_1    (GEOSadas-5_6_1 to GEOSadas-5_7_2)
     Fortuna-1_4    (MERRA)

Note: Boundary Condition Tag Ganymed-1_0 should be treated like Fortuna-2_1