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 ...
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NASA National Snow and Ice Data Center Distributed Active Archive Center
The MODIS/Terra Sea Ice Extent and IST Daily L3 Global 4km EASE-Grid Day (MOD29E1D) data set contains Northern and Southern Hemisphere daily sea ice extent and ice surface temperature (IST), gridded to a 4 km resolution Equal Area Scalable Earth Grid (EASE-Grid).
Note: Version 6 reprocessing was completed in October, 2015. Forward processing will continue for both Version 5 and Version 6 for approximately one year, after which Version 5 will be discontinued.
Sea ice extent and ice surface temperature algorithms and data sets are the same as Version 5. However, revisions and improvements for Version 6 to algorithm inputs have improved sea ice outputs as follows:
Revised calibration of MOD02 thermal bands 31 and 32 decreased calculated brightness temperatures by about -0.01 K and improved accuracy for very cold scenes;
The Version 6 land/water mask in the MOD03 geolocation product increased the accuracy of water body and coastline maps;
Revisions to the MOD35_L2 cloud mask algorithm have increased the accuracy of cloud detection.