Specify a surface type map, which is used in combinition with albedo_library, latitude, and longitude in order to select the surface type relevant for the simulation. No pixel interpolation is done. The format of the call is:
surface_type_map file [variable_name]
where file is the location of the surface type map file. The map is expected to be in netCDF format. The file must contain the variables double lat(nlat), double lon(nlon), and byte surface_type (nlat, nlon). If the name of the surface type variable is different, the optional argument can be used in order to specify the variable name. For format specification see also data/albedo/IGBP_map/SURFACE_TYPE_IGBP_10min.cdf.

For using the IGBP map, the call is surface_type_map IGBP. This map has a resolution of 10 minutes and contains the surface types 1 to 18 defined in the albedo_library IGBP. Fresh snow and sea ice are not included, as their extent is too variable. Attention: That implies e.g. that the Arctic is considered ocean_water and not sea_ice!

Locations on the pixel boundaries are interpreted as the pixel northward and eastward respectively. E.g. location 0 N, 0 E is interpreted like the pixel ranging from 0 to 10min North and from 0 to 10min East.





Arve Kylling 2010-03-10