Regridding restarts for Fortuna 2.0: Difference between revisions

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Here are the basic instructions on how to regrid restarts.
Here are basic instructions on how to regrid restarts, based on a README by Larry Takacs.
 
== Where to get MERRA Restarts ==
 
MERRA restarts are available on the NCCS discover cluster under the following directories:
 
/archive/g_proj5/production/GEOSdas-2_1_4/d5_merra_jan79/rs/
/archive/g_proj5/production/GEOSdas-2_1_4/d5_merra_jan89/rs/
/archive/g_proj5/production/GEOSdas-2_1_4/d5_merra_jan98/rs/
 
Restarts are in subdirectories according to their respective year and month.  The are in the form (as an example) <code>d5_merra_jan79.catch_internal_rst.19910128_21z.bin</code>, which you would otherwise know as <code>catch_internal_rst</code> (with the appropriate <code>cap_restart</code>).  MERRA restart filenames need to be changed to the latter, "entropic" name for the regridding programs.


== Required Restarts ==
== Required Restarts ==
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====2) Target tile file is from NEW set (model tags <code>Fortuna-1_5</code> and later)====
====2) Target tile file is from NEW set (model tags <code>Fortuna-1_5</code> and later)====


In this case, the target TILE files are consistent with the
In this case, the target tile files are consistent with the <code>mosaic_veg_typs_fracs</code> dataset which resides in the <code>InData</code> directory.
<code>mosaic_veg_typs_fracs dataset</code> which
resides in the <code>InData</code> directory.
Therefore you do not have link in the old <code>nirdf.dat</code>, <code>visdf.dat</code>, and
Therefore you do not have link in the old <code>nirdf.dat</code>, <code>visdf.dat</code>, and
<code>lai_grn_clim</code> datasets.
<code>lai_grn_clim</code> datasets.


== Bootstrapping for a Complete Set of Restarts ==
== Bootstrapping for a Complete Set of Restarts ==
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The above procedure produces all the necessary restart files for the model to run, but others are needed for proper function.  The model can produce them starting from the minimal set created by the regridding procedure; this requires some modification of the <code>AGCM.tmpl</code> file in your experiment home directory (probably under your account home directory).   
The above procedure produces all the necessary restart files for the model to run, but others are needed for proper function.  The model can produce them starting from the minimal set created by the regridding procedure; this requires some modification of the <code>AGCM.tmpl</code> file in your experiment home directory (probably under your account home directory).   


In <code>AGCM.tmpl</code> -- you might want to keep a copy for normal runs -- and using <code>turb_import_rst</code> as an example, comment out the lines referring to <code>RESTART</code>:
In <code>AGCM.tmpl</code> -- you probably want to keep a copy of the default version for normal runs -- and using <code>turb_import_rst</code> as an example, comment out the lines referring to <code>RESTART</code>:


  TURBULENCE_IMPORT_RESTART_FILE:        turb_import_rst
  TURBULENCE_IMPORT_RESTART_FILE:        turb_import_rst
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  TURBULENCE_IMPORT_CHECKPOINT_TYPE:      binary
  TURBULENCE_IMPORT_CHECKPOINT_TYPE:      binary


Running the model for a model day will produce a full set of restart files, which can be used with the default model configuration.
Running the model for a model day using this modified <code>AGCM.tmpl</code> will produce a full set of restart files, which can be used with the default model configuration.