Permafrost active layer thickness for the Northern Hemisphere, v4.0 from MODIS LST, ERA5, 1997-2021

Westermann, Sebastian; Barboux, Chloé; Bartsch, Annett; Delaloye, Reynald; Grosse, Guido; Heim, Birgit; Hugelius, Gustaf; Irrgang, Anna; Kääb, Andreas Max; Matthes, Heidrun; Nitze, Ingmar; Pellet, Cécile; Seifert, Frank Martin; Strozzi, Tazio; Wegmüller, Urs; Wieczorek, Mareike; Wiesmann, Andreas

This dataset contains v4.0 permafrost active layer thickness data produced as part of the European Space Agency's (ESA) Climate Change Initiative (CCI) Permafrost project. It forms part of the third version of their Climate Research Data Package (CRDP v3). It is derived from a thermal model driven and constrained by satellite data. CRDPv3 covers the years from 1997 to 2021. Grid products of CDRP v3 are released in annual files, covering the start to the end of the Julian year. The maximum depth of seasonal thaw is provided, which corresponds to the active layer thickness.

Case A: It covers the Northern Hemisphere (north of 30°) for the period 2003-2021 based on MODIS Land Surface temperature merged with downscaled ERA5 reanalysis near-surface air temperature data. Case B: It covers the Northern Hemisphere (north of 30°) for the period 1997-2002 based on downscaled ERA5 reanalysis near-surface air temperature data which are bias-corrected with the Case A product for the overlap period 2003-2021 using a pixel-specific statistics for each day of the year.

Citation

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

Westermann, S.; Barboux, C.; Bartsch, A.; Delaloye, R.; Grosse, G.; Heim, B.; Hugelius, G.; Irrgang, A.; Kääb, A.M.; Matthes, H.; Nitze, I.; Pellet, C.; Seifert, F.M.; Strozzi, T.; Wegmüller, U.; Wieczorek, M.; Wiesmann, A. (2024): ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost active layer thickness for the Northern Hemisphere, v4.0. NERC EDS Centre for Environmental Data Analysis, 24 April 2024. doi:10.5285/d34330ce3f604e368c06d76de1987ce5. https://dx.doi.org/10.5285/d34330ce3f604e368c06d76de1987ce5

Contact

Westermann, Sebastian

Metadata Access

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Data and Resources

Additional Info

Field Value
Identifier DOI:10.5285/d34330ce3f604e368c06d76de1987ce5
Project(s) ESA Permafrost Climate Change Initiative Project (Permafrost_cci)
Institute University of Oslo
Source https://dx.doi.org/10.5285/20ec12f5d1f94e99aff2ed796264ee65
Publication Date 2024-04-03
Version v4.0
Product Permafrost Active Layer Thickness
Sensor MODIS MOD11A1 and MYD11A1 level 3 Collection 6, ESA CCI Land Cover dataset v1.6.1, ERA5 Reanalysis
Files
  1. Active Layer Thickness per year
Variables [Units]
  1. ALT: permafrost active layer thickness [metres]
  2. ALT_uncertainty: spatial uncertainty (variability within pixel) of active layer thickness [metres]
  3. time: time [hours since 1950-01-01 00:00:00]
  4. lat: latitude [degrees_north]
  5. lon: longitude [degrees_east]
Region Circum-Arctic
Spatial Reference EPSG:4326 WGS 84
Spatial Resolution 1000 m
Spatial Coverage Latitude 25.00 to 85.00, Longitude -180.00 to 180.00
Temporal Coverage 1997-01-01T00:00:00 - 2021-12-31T00:00:00
Temporal Resolution July-August
Format NetCDF
Is Supplement To

Westermann, S.; Barboux, C.; Bartsch, A.; Delaloye, R.; Grosse, G.; Heim, B.; Hugelius, G.; Irrgang, A.; Kääb, A.M.; Matthes, H.; Nitze, I.; Pellet, C.; Seifert, F.M.; Strozzi, T.; Wegmüller, U.; Wieczorek, M.; Wiesmann, A. (2024): ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost version 4 data products. NERC EDS Centre for Environmental Data Analysis, date of citation. http://catalogue.ceda.ac.uk/uuid/7479606004d9465bad949671501e5f21
Related to

Obu, J.; Westermann, S.; Barboux, C.; Bartsch, A.; Delaloye, R.; Grosse, G.; Heim, B.; Hugelius, G.; Irrgang, A.; Kääb, A.M.; Kroisleitner, C.; Matthes, H.; Nitze, I.; Pellet, C.; Seifert, F.M.; Strozzi, T.; Wegmüller, U.; Wieczorek, M.; Wiesmann, A. (2021): ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost active layer thickness for the Northern Hemisphere, v3.0. NERC EDS Centre for Environmental Data Analysis, 28 June 2021. doi:10.5285/67a3f8c8dc914ef99f7f08eb0d997e23. https://dx.doi.org/10.5285/67a3f8c8dc914ef99f7f08eb0d997e23

Dataset extent