About

The National Snow and Ice Data Center (NSIDC) is part of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado at Boulder. NSIDC supports research into our world's frozen realms: the snow, ice, glaciers, frozen ground, and climate interactions that make up Earth's cryosphere. Scientific data, whether taken in the field or relayed from satellites orbiting Earth, form the foundation for the scientific research that informs the world about our planet and our climate systems.

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

Access/re-use

According to Use/Copyright Info page, material is available for re-use by default:

Users may download and use any imagery or text from our Web site unless it is specifically stated that the information has limitations for its use. We ask that the use of any imagery, text, or data accessed from the NSIDC Web site be credited as having been provided by the National Snow and Ice Data Center.

They ask for citation as per their Citing NSIDC Data page.