MEaSUREs Global Record of Daily Landscape Freeze/Thaw Status, Version 4
Data set id:
DOI: 10.5067/MEASURES/CRYOSPHERE/nsidc-0477.004
There is a more recent version of these data.
Version Summary

  • Extended F/T record to 2017;

  • F/T domain expanded to all land areas affected by seasonal freezing, including urban, snow-ice dominant, open water body dominant, and barren land;

  • Added a modified seasonal threshold algorithm (MSTA) and pixel-wise, annual MSTA calibration using daily surface air temperature records;

  • Added bit flags to identify cells (and days) with missing/interpolated Tb, large open water bodies, complex terrain, and large precipitation events;


This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, consists of two global records of the daily freeze/thaw (F/T) status of the landscape. The primary record is derived from radiometric brightness temperatures acquired between 1979 and 2017 by three satellite-based passive microwave sensors: the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), and the Special Sensor Microwave Imager/Sounder (SSMIS). A second, synergistic record is available for the years 2002 to 2017, derived from observations acquired by the Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) and the Advanced Microwave Scanning Radiometer 2 (AMSR2).
Aqua, DMSP 5D-2/F11, DMSP 5D-2/F13, DMSP 5D-2/F8, DMSP 5D-3/F17, FY-3B, GCOM-W1, Nimbus-7
Data Format(s):
Temporal Coverage:
1 January 2017 to 31 December 2017
19 June 2002 to 27 September 2016
1 January 1979 to 31 December 2016
Temporal Resolution:
  • 1 day
Spatial Resolution:
  • 25 km
  • 25 km
Spatial Reference System(s):
NSIDC EASE-Grid Global
Spatial Coverage:
Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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