Active Layer Thickness 2020-2029

This raster, created in 2010, is output from the Geophysical Institute Permafrost Lab (GIPL) model and represents simulated active layer thickness (ALT) in meters averaged across a decade. The file name specifies the decade the raster represents. For example, a file named ALT_1980_1989.tif represents the decade spanning 1980-1989. Cell values represent simulated maximum depth (in meters) of thaw penetration (for areas with permafrost) or frost penetration (for areas without permafrost). If the value of the cell is positive, the area is underlain by permafrost and the cell value specifies the depth of the seasonally thawing layer above permafrost. If the value of the cell is negative, the ground is only seasonally frozen and the cell value specifies the depth of seasonal frost. The raster covers the entire state of Alaska and has a spatial resolution of 2 x 2km. These data were generated by forcing the GIPL model with a composite of five GCM model outputs (ECHAM5, GFLD21, MIROC, HADLEY and CCCMA) for the A1B emissions scenario.

Data and Resources

Field Value
accessLevel public
bureauCode {010:00}
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier dd4f173e-a907-4cde-923d-c6008eae8c86
metadata_type geospatial
modified 2019-09-09T01:01:45-08:00
old-spatial {"type": "Polygon", "coordinates": [[[-179.999988541, 51.3761358992], [-121.297507628, 51.3761358992], [-121.297507628, 71.437468666], [-179.999988541, 71.437468666], [-179.999988541, 51.3761358992]]]}
publisher LCC Network
resource-type Dataset
source_datajson_identifier true
source_hash 138914f953d321c200492b0c2dcee041e8e27e7c
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-179.999988541, 51.3761358992], [-121.297507628, 51.3761358992], [-121.297507628, 71.437468666], [-179.999988541, 71.437468666], [-179.999988541, 51.3761358992]]]}
theme {geospatial}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • academics-scientific-researchers
  • amerigeo
  • amerigeoss
  • ckan
  • dynamic-vegetation-ecosystem-models
  • environment
  • federal-resource-managers
  • geo
  • geoss
  • interested-public
  • land-cover
  • landscape-ecology
  • landscape-processes
  • national
  • north-america
  • permafrost
  • soil-temperature
  • united-states
  • wetlands
isopen False
license_id notspecified
license_title License not specified
maintainer (Point of Contact); Arctic Landscape Conservation Cooperative (Point of Contact, Publisher)
maintainer_email lccdatasteward@fws.gov
metadata_created 2025-11-22T01:41:11.495976
metadata_modified 2025-11-22T01:41:11.495981
notes This raster, created in 2010, is output from the Geophysical Institute Permafrost Lab (GIPL) model and represents simulated active layer thickness (ALT) in meters averaged across a decade. The file name specifies the decade the raster represents. For example, a file named ALT_1980_1989.tif represents the decade spanning 1980-1989. Cell values represent simulated maximum depth (in meters) of thaw penetration (for areas with permafrost) or frost penetration (for areas without permafrost). If the value of the cell is positive, the area is underlain by permafrost and the cell value specifies the depth of the seasonally thawing layer above permafrost. If the value of the cell is negative, the ground is only seasonally frozen and the cell value specifies the depth of seasonal frost. The raster covers the entire state of Alaska and has a spatial resolution of 2 x 2km. These data were generated by forcing the GIPL model with a composite of five GCM model outputs (ECHAM5, GFLD21, MIROC, HADLEY and CCCMA) for the A1B emissions scenario.
num_resources 187
num_tags 19
title Active Layer Thickness 2020-2029