NASA Distributed Active Archive Center (DAAC) at NSIDC


Moderate Resolution Imaging Spectroradiometer

Global Daily Snow Extent in 0.05 Degree 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, Version 4 data set, available from NSIDC. MOD10A1 500 m pixels that lie within a 0.05 degree resolution Climate Modeling Grid (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.

The following file is the source file used to create this image:

Global Daily Snow Extent in 0.05 deg Climate Modeler's Grid

Legend for CMG snow extent