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Description

This dataset provides annual estimates of active layer thickness (ALT) at 1 km resolution across Alaska from 2001-2015. The ALT was estimated using a remote sensing-based soil process model incorporating global satellite data from Moderate Resolution Imaging Spectroradiometer (MODIS) land surface temperature (LST) and snow cover extent (SCE), and Soil Moisture Active and Passive (SMAP) satellite soil moisture records. The study area covers the majority land area of Alaska except for areas of perennial ice/snow cover or open water. The ALT was defined as the maximum soil thawing depth throughout the year. The mean ALT and mean uncertainty from 2001 to 2015 are also provided.

Product Summary

Platforms
SATELLITES,
SMAP
Instruments
MODIS,
SMAP L-BAND RADAR
Spatial Extent
N: 70.214 S: 55.5667 E: -132.576 W: -179.18
Geographic Region
ALASKA
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2001-01-01 to 2015-12-31
Data Partner
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) (ORNL_DAAC)
Concept ID
c2143402571-ornl_cloud
Data State
COMPLETE
Processing Level
3
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Yi, Y., & Kimball, J. S. (2020). ABoVE: Active Layer Thickness from Remote Sensing Permafrost Model, Alaska, 2001-2015 (Version 1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/1760 Date Accessed: 2025-06-21

Additional Citation

Yi, Y., and J.S. Kimball. 2020. ABoVE: Active Layer Thickness from Remote Sensing Permafrost Model, Alaska, 2001-2015. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1760

Documents

GENERAL DOCUMENTATION ABoVE: Satellite-based Active Layer Thickness Maps, Alaska, 2001-2015: Sat_ActiveLayer_Thickness_Maps.pdf
USER'S GUIDE ORNL DAAC Data Set Documentation

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