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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Arctic Soil Freeze/Thaw Status from SMMR and SSM/I, Version 2: Sample Image
The following image from 02 January 1999 was created from "Arctic Soil Freeze/Thaw Status from SSM/I" data. It shows the spatial extent of the Arctic terrestrial drainage basin.