Maps of ice wedge thermokarst pool expansion from twenty-seven circumpolar survey areas

Dataset · Mon Jan 01 04:00:00 EST 2024

DOI:https://doi.org/10.5440/1834773· OSTI ID:1834773

Abolt, Charles ^[1]; Atchley, Adam ^[2]; Harp, Dylan; Rumpca, Collin

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1. Los Alamos National Laboratory; Los Alamos National Laboratory
2. Los Alamos National Laboratory

This repository includes data and code to accompany the manuscript 'Topography controls variability in circumpolar permafrost thaw pond expansion' by Abolt et al. The data include satellite imagery and derived maps of thermokarst pools from twenty-seven survey areas in North America and Siberia. The code, written in MATLAB (R2021a), contains demonstrations of the workflow for generating the maps. The demonstrations include training a generalized UNet for mapping thermokarst pools using data from three survey areas, 'fine tuning' the UNet for use at a specific survey area using transfer learning, applying a trained UNet to infer thermokarst pool extent within satellite imagery, and performing histogram matching as a pre-processing step to improve satellite imagery contrast. Contains MATLAB script files and M files, TIF files, shape files, XML, Excel, TXT, and CSV files.The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic) was a research effort to reduce uncertainty in Earth System Models by developing a predictive understanding of carbon-rich Arctic ecosystems and feedbacks to climate. NGEE Arctic was supported by the Department of Energy's Office of Biological and Environmental Research. The NGEE Arctic project had two field research sites: 1) located within the Arctic polygonal tundra coastal region on the Barrow Environmental Observatory (BEO) and the North Slope near Utqiagvik (Barrow), Alaska and 2) multiple areas on the discontinuous permafrost region of the Seward Peninsula north of Nome, Alaska. Through observations, experiments, and synthesis with existing datasets, NGEE Arctic provided an enhanced knowledge base for multi-scale modeling and contributed to improved process representation at global pan-Arctic scales within the Department of Energy's Earth system Model (the Energy Exascale Earth System Model, or E3SM), and specifically within the E3SM Land Model component (ELM).

• Research Organization: Next Generation Ecosystems Experiment - Arctic, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (US)
• Sponsoring Organization: U.S. DOE > Office of Science > Biological and Environmental Research (BER)
• Contributing Organization: ORNL
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1834773
• Report Number(s): https://doi.org/10.5440/1834773; NGA272
• Availability: ORNL
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
Alaska
Arctic
Canada
EARTH SCIENCE > CRYOSPHERE > SNOW/ICE
EARTH SCIENCE > LAND SURFACE > SOILS
EARTH SCIENCE > SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY
EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER
Siberia
area
thermokarst pool area