Arctic Soil Freeze/Thaw Status from SMMR and SSM/I, Version 2

Published by NSIDC | National Aeronautics and Space Administration | Metadata Last Checked: October 22, 2025 | Last Modified: 2025-09-10

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.

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earth-science-frozen-ground-cryosphere-seasonally-frozen-ground-seasonally-frozen-ground earth-science-frozen-ground-land-surface-seasonally-frozen-ground-seasonally-frozen-ground earth-science-snow-ice-cryosphere-freeze-thaw-freeze-thaw earth-science-snow-ice-terrestrial-hydrosphere-freeze-thaw-freeze-thaw

Complete Metadata

bureauCode	[ "026:00" ]
identifier	10.7265/c7f8-6t68
landingPage	https://nsidc.org/forms/GGD641_or.html?major_version=2
programCode	[ "026:000" ]
spatial	["CARTESIAN",[{"WestBoundingCoordinate":-180.0,"NorthBoundingCoordinate":90.0,"EastBoundingCoordinate":180.0,"SouthBoundingCoordinate":45.0}]]
temporal	1978-10-01/1978-10-01
theme	[ "Earth Science" ]

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