Arctic Soil Freeze/Thaw Status from SMMR and SSM/I, Version 2
This data set contains near-surface (< 5 cm) soil freeze/thaw status on snow-free and snow-covered land surfaces over the Arctic terrestrial drainage basin. The near-surface soil freeze/thaw status is determined by using passive-microwave remote sensing data over snow-free land and a numerical model over snow-covered land. Data are projected to a 25 km x 25 km Northern Hemisphere EASE-Grid. Version 2 of this data set greatly extends the temporal coverage and makes use of data from SMMR as well as SSM/I. Data are from October 1978 to June 2004. Data are in ASCII text format and are available via FTP.
The following example shows how to cite the use of this data set in a publication. For more information, see our Use and Copyright Web page.
Zhang, T. and R. Armstrong. 2003. Arctic Soil Freeze/Thaw Status from SMMR and SSM/I. Version 2. [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center.