Freeze/Thaw Timing from ENVISAT ASAR GM, 2005-2010, Yakutsk, Central Yakutia (RU)

Sabel, Daniel; Park, Sang-Eun; Bartsch, Annett; Schlaffer, Stefan; Klein, Jean-Pierre; Wagner, Wolfgang

The SAR Freeze/Thaw product indicates the timing (day of year) of ground surface freeze-up and thawing at a resolution of 1 km. It is derived from the ENVISAT ASAR sensor operating in Global Monitoring (GM) mode. The SAR F/T product represents timing (day of year) of ground surface freeze-up and thawing at a resolution of 1 km. The version 2 release of the data covers the years 2005 through 2010 for the regional sites Ob Estuary, Alaska, Mackenzie, Laptev Sea Coast and Central Yakutia. Product quality and geographical coverage is strongly dependent on the availability of ASAR GM data. The available number of measurements per year is supplied with the dataset.

More information about the image processing and the freeze/thaw retrieval can be found in the product guide.

This dataset is part of the ESA Data User Element (DUE) Permafrost Full Product Set.


In order to use these data, you must cite this data set with the following citation:


Annett Bartsch

Metadata Access

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Data and Resources

Additional Info

Field Value
Identifier DOI:10.1594/PANGAEA.779658
Project(s) ESA DUE Permafrost
Institute Institute of Photogrammetry and Remote Sensing, Vienna University of Technology
Publication Date 2012-04-20
Version 2.0
Product Freeze/Thaw
Sensor ENVISAT ASAR Global Monitoring
  1. Timing of surface thawing (extension _tha.tif)
  2. Timing of surface freezing (extension _fre.tif)
  3. Number of Measurements (extension _num.tif)
Variables [Units]
  1. Timing of thawing [day of year, -1: missing or masked data]
  2. Timing of freezing [day of year, -1: missing or masked data]
  3. Number of Measurements [count, -1: missing or masked data]
Region Central Yakutia
Spatial Reference EPSG:4326 WGS 84
Spatial Resolution 1000 m
Spatial Coverage Latitude 60.00 to 63.50, Longitude 128.00 to 133.50
Temporal Coverage 2005-2010
Temporal Resolution
Format Geotiff
Is Supplement To
Related to

Dataset extent

Map tiles and data by OpenStreetMap, under CC BY SA.