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User Guide to ECMWF Forecast Products > The ECMWF global atmospheric model > Climatological and geographical fields > 
 The model orography  The sea surface temperature (SST)  
   

The land-sea mask

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The model orography
The land-sea mask
The sea surface temperature (SST)
The albedo
Aerosols
The surface vegetation
Snow
Sea surface conditions
 
 

The land-sea mask is a field that contains, for every grid point, the relative percentage of land and water. At the current status this number is not used to create a mix environment but only to divide the model surface into sea and land points, defined by a land-sea mask taking values between 0 (100% sea) to 1 (100% land). A grid point is defined as a land point if its value > 0.5 indicating that more than 50% of the actual area within the grid-box is covered by land.

  1. The mean height (shaded [dam]) and grid points distribution over Europe in the T799 operational model.
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Top of page 31-03-2007
 
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 The model orography  The sea surface temperature (SST)  
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