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Global Daily Snow Extent in 0.05° Climate Modeling Grid
03 April 2003

This image was derived from the "Day CMG Snow Cover" field of the MODIS/Terra Snow Cover Daily L3 Global 0.05Deg CMG data set, available from NSIDC. MOD10A1 500-m pixels that lie within a 0.05-degree resolution CMG pixel are binned to determine surface features. Data are gridded in a geographic projection. Snow percentage in each cell of the "Day CMG Snow Cover" field is calculated using 500-m totals of the number of snow observations and count of land observations in that cell for the day. The percentage of snow-covered land is based on the clear-sky view of land in the CMG cell. So, the amount of snow observed in a CMG cell is based on the cloud-free observations mapped into the CMG grid cell for all land in that cell.

Source file: MOD10C1.A2003093.004.2003096154224.hdf