This directory contains monthly averages of select fields from GODAS analyses.
The internal time stamp indicates the last day of the averaging period.

Please check the horizontal grid and vertical levels used for each field.
The horizontal grid for the u- and v- velocity components is offset from 
the grid for the other fields.  Additionally, the vertical grid for the 
vertical velocity is offset from the other subsurface fields.

Information on grib data from NCEP is available in Office Note 388:
   http://www.nco.ncep.noaa.gov/pmb/docs/on388/


As of February 6, 2006 the subdirectories, "monthly" and "pentad", contain
corrected GODAS analyses.  The correction involves analyses only through the 
end of 1989.  Nevertheless, the new analyses were extended through 2004 and 
the post-1990 analyses will show small differences with the earlier version 
due to small changes to the assimilation data set.

The original erroneous analyses are in "monthly_old" and "pentad_old".


Beginning with 2006 fields, computation of the depth of the bottom of
the isothermal layer and depth of the bottom of the mixed layer was
modifed to mask out ambiguous regions.  These are essentially at high
latitudes where there may be inversions or ice cover.  The modification 
was implemented on 09 March 2006.  Any preexisting 2006 fields were 
overwritten.


Questions?   Contact Diane.Stokes@noaa.gov or David.Behringer@noaa.gov