Overview
DOI | https://doi.org/10.3334/ORNLDAAC/1267 |
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Version | 1 |
Project | |
Published | 2015-01-23 |
Usage | 718 downloads |
Description
Active layer thickness (ALT) is a critical parameter for monitoring the status of permafrost that is typically measured at specific locations using probing, in situ temperature sensors, or other ground-based observations. The thickness of the active layer is the average annual thaw depth, in permafrost areas, due to solar heating of the surface. This data set includes the mean Remotely Sensed Active Layer Thickness (ReSALT) over years 1992 to 2000 for an area near Prudhoe Bay, Alaska. The data were produced by an Interferometric Synthetic Aperture Radar (InSAR) technique that measures seasonal surface subsidence and infers ALT. ReSALT estimates were validated by comparison with ground-based ALT measurements at multiple sites. These results indicate remote sensing techniques based on InSAR could be an effective way to measure and monitor ALT over large areas on the Arctic coastal plain. These data provide gridded (100-m) estimates of active layer thickness (cm; ALT), seasonal subsidence (cm) and subsidence trend (mm/yr), as well as calculated uncertainty in each of these parameters. This data set was developed in support of NASA's Arctic-Boreal Vulnerability Experiment (ABoVE) field campaign. The data are presented in one netCDF (*.nc) file.
Science Keywords
- CRYOSPHERE
- FROZEN GROUND
- ACTIVE LAYER
- LAND SURFACE
- TOPOGRAPHY
- TERRAIN ELEVATION
Data Use and Citation
This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use Policy. See our Data Use and Citation Policy for more information.
Data Files
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Companion Files
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Dataset Companion Files
Dataset has 2 companion files.
- InSAR_Prudhoe_Bay.pdf
- ReSALT_prudhoe.txt
Advanced Data Access through THREDDS Data Server
THREDDS Data Access: Pre-ABoVE: Remotely Sensed Active Layer Thickness, Prudhoe Bay, Alaska, 1992-2000 THREDDS Data Access.
See our THREDDS Data Server Catalog Service page for more information.