NRCAN-RNCAN GeoGratis

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National Snow and Ice Data Center

The National Snow and Ice Data Center (NSIDC) supports research into our
world's frozen realms: the snow, ice, glaciers, frozen ground, and
climate interactions that make up Earth's cryosphere.

NSIDC manages and distributes scientific data, creates tools for data
access, supports data users, performs scientific research, and educates
the public about the cryosphere.

NSIDC distributes more than 500 cryospheric data sets for researchers,
from both satellite and ground observations. See Data at NSIDC to browse
our holdings, get information, and download or order data sets.

http://nsidc.org