Active Layer Thickness 2090-2099

The Geophysical Institute Permafrost Lab (GIPL) model was developed specifically to assess the effect of a changing climate on permafrost. The GIPL 1.0 model is a quasi-transitional, spatially distributed, equilibrium model for calculating the active layer thickness and mean annual ground temperature. The GIPL-1 model accounts effectively for the effects of snow cover, vegetation, soil moisture, and soil thermal properties. The GIPL-1 model allows for the calculation of maximum active layer thickness (ALT) and mean annual ground temperatures (MAGT) at the bottom of the active layer. The approach to determine the ALT and MAGT is based on an approximate analytical solution that includes freezing/thawing processes and provides an estimation of thermal offset due to the difference in frozen and thawed soil thermal properties (Kudryavtsev, et al., 1974). It uses the idea of applying the Fourier temperature wave propagation theory to a medium with phase transitions, such as freezing/thawing ground. Application of this approach resulted in the discovery of the thermal offset and an understanding of the laws that govern the dynamics of the ground thermal regime. These discoveries led to an understanding of the effects that the thermal properties of the ground have upon the MAGTs and ALT, and how periodically (seasonally) varying climatic parameters affect permafrost dynamics. The output parameters of this method are given as annual averages.

Data and Resources

Field Value
accessLevel public
bureauCode {010:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier e847b2d0-d851-40a6-9780-2edf1fbfe61a
metadata_type geospatial
modified 2019-09-09T03:28:43-08:00
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 25fd1fa486394f109517ef76dad7accc3725567f
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 2025-11-21T15:24:32.556490
metadata_modified 2025-11-21T15:24:32.556494
notes The Geophysical Institute Permafrost Lab (GIPL) model was developed specifically to assess the effect of a changing climate on permafrost. The GIPL 1.0 model is a quasi-transitional, spatially distributed, equilibrium model for calculating the active layer thickness and mean annual ground temperature. The GIPL-1 model accounts effectively for the effects of snow cover, vegetation, soil moisture, and soil thermal properties. The GIPL-1 model allows for the calculation of maximum active layer thickness (ALT) and mean annual ground temperatures (MAGT) at the bottom of the active layer. The approach to determine the ALT and MAGT is based on an approximate analytical solution that includes freezing/thawing processes and provides an estimation of thermal offset due to the difference in frozen and thawed soil thermal properties (Kudryavtsev, et al., 1974). It uses the idea of applying the Fourier temperature wave propagation theory to a medium with phase transitions, such as freezing/thawing ground. Application of this approach resulted in the discovery of the thermal offset and an understanding of the laws that govern the dynamics of the ground thermal regime. These discoveries led to an understanding of the effects that the thermal properties of the ground have upon the MAGTs and ALT, and how periodically (seasonally) varying climatic parameters affect permafrost dynamics. The output parameters of this method are given as annual averages.
num_resources 187
num_tags 19
title Active Layer Thickness 2090-2099