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Looking for facts and information? See About the Cryosphere.
Icelights: Answers to your burning questions about ice and climate
What's hot in the news around climate and sea ice and what are scientists talking about now? Read more...
What is the Cryosphere?
When scientists talk about the cryosphere, they mean the places on Earth where water is in its solid form, frozen into ice or snow. Read more ...
This data set reports the location of snow cover based on the Normalized Difference Snow Index (NDSI) and a series of screens designed to alleviate errors and flag uncertain snow cover detections. The NDSI is derived from radiance data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Terra satellite.
NOTE: Forward processed data are available from 01/14/2016 to present, except for 02/19/16 - 02/27/17 when the MODIS Terra instrument was offline. Reprocessing to Version 6 is ongoing but data are limited at this time. NSIDC will continue to distribute Version 5 of this data set until reprocessing is complete.
Changes for Version 6 include:
N: 90, S: -90, E: 180, W: -180