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Pre-ABoVE: Ground-penetrating Radar Measurements of ALT on the Alaska North Slope

Published by ORNL_DAAC | National Aeronautics and Space Administration | Catalog Last Checked: August 11, 2026 at 11:25 PM | Dataset Last Updated: August 11, 2026
This data set includes estimates of permafrost Active Layer Thickness (ALT; cm), and calculated uncertainties, derived using a ground-penetrating radar (GPR) system in the field in August 2014 near Toolik Lake and Happy Valley on the North Slope of Alaska. GPR measurements were taken along 10 transects of varying length (approx. 1 to 7 km). Traditional ALT estimates from mechanical probing every 100 to 500 m along each transect are also included. These data are suitable for future studies of how ALT varies over relatively large geological features, such as hills and valleys, wetland areas, and drained lake basins.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
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contactPoint 
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  "@type": "vcard:Contact",
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}
description This data set includes estimates of permafrost Active Layer Thickness (ALT; cm), and calculated uncertainties, derived using a ground-penetrating radar (GPR) system in the field in August 2014 near Toolik Lake and Happy Valley on the North Slope of Alaska. GPR measurements were taken along 10 transects of varying length (approx. 1 to 7 km). Traditional ALT estimates from mechanical probing every 100 to 500 m along each transect are also included. These data are suitable for future studies of how ALT varies over relatively large geological features, such as hills and valleys, wetland areas, and drained lake basins.
distribution 
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identifier 10.3334/ORNLDAAC/1265
keyword 
[
  "earth-science-frozen-ground-cryosphere-active-layer",
  "earth-science-frozen-ground-cryosphere-permafrost",
  "earth-science-frozen-ground-land-surface-active-layer",
  "earth-science-frozen-ground-land-surface-permafrost",
  "earth-science-snow-ice-cryosphere-permafrost",
  "earth-science-snow-ice-terrestrial-hydrosphere-permafrost",
  "earth-science-soils-land-surface-permafrost",
  "earth-science-terrestrial-hydrosphere-indicators-climate-indicators-permafrost-melt"
]
license https://www.usa.gov/government-works
modified 2026-08-11
programCode 
[
  "026:000"
]
publisher 
{
  "name": "ORNL_DAAC",
  "@type": "org:Organization"
}
spatial 
"["CARTESIAN", [{"WestBoundingCoordinate": -149.5, "NorthBoundingCoordinate": 69.15, "EastBoundingCoordinate": -148.7, "SouthBoundingCoordinate": 68.4}]]"
temporal 2014-08-10/2014-08-15
theme 
[
  "Earth Science"
]
title Pre-ABoVE: Ground-penetrating Radar Measurements of ALT on the Alaska North Slope

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