Skip Navigation Links 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
Environmental Modeling Center


Land/Sea Mask in the RTG_SST_HR analysis

The RTG_SST_HR analysis is done over all ocean areas, the Great Lakes, and any other inland bodies of water resolved by the land-sea mask. There is no analysis over land. The land values are filled by a Cressman interpolation to produce a complete grid for possible interpolation to other grids. The ocean and land areas are defined by a land sea mask. This data set is an ASCII file, ls.dat, which may be found at the FTP site:

The spatial grid is defined identically to the grid for the SST arrays, with indices starting just east of the Greenwich Meridian and near the South Pole. The values in ls.dat are set to 0 over the ocean and 3 over land. It can be read by the following Fortran code:

DIMENSION LS(4320,2160)
OPEN (11,FILE='ls.dat')
C Read in land sea tags (0 for ocean; 3 for land)
READ (11,'(80I1)') LS

NOAA/ National Weather Service
National Centers for Environmental Prediction
Environmental Modeling Center
5830 Unversity Research Court
College Park, Maryland 20740
Page Author: EMC Webmaster
Privacy Policy
About Us
Career Opportunities
Page last modified: Thursday, 18-Dec-2014 19:11:22 UTC