The NSIDC Web site and data services are currently having intermittent problems and may be unavailable. We are working to restore these services as soon as possible and apologize for any inconvenience this may cause. Please contact NSIDC User Services for assistance.
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.