Overview
| DOI | https://doi.org/10.3334/ORNLDAAC/1790 |
|---|---|
| Version | 1 |
| Project | |
| Published | 2020-07-15 |
| Updated | 2020-07-15 |
| Usage | 276 downloads |
| Citations | 1 publication cited this dataset |
Description
This dataset provides Synthetic Aperture Radar (SAR) estimates of lake-source methane ebullition flux in mg CH4/m2/d for thousands of lakes in five regions across Alaska. The study regions include the Atqasuk, Barrow Peninsula, Fairbanks, northern Seward Peninsula, and Toolik. L-band SAR backscatter values for early winter lake ice scenes were collected from 2007 to 2010 over 5,143 lakes using the Phased Array type L-band Synthetic Aperture Radar (PALSAR) instrument on the Advanced Land Observing Satellite (ALOS-1) satellite. The backscatter data were combined with field measurements of methane ebullition from 48 study lakes across the five regions to obtain a volumetric flux estimate for each lake. Mean methane gas-fractions from each region were applied to the SAR-based volumetric fluxes to obtain an estimate of methane ebullition mass flux per lake. The data files contain lake perimeters and the lake-specific attributes of lake area, SAR backscatter values and standard errors, volumetric flux with standard errors, mean percent of methane from gas samples, and methane ebullition mass flux.
Science Keywords
- TERRESTRIAL HYDROSPHERE
- SNOW/ICE
- LAKE ICE
- TERRESTRIAL HYDROSPHERE
- SURFACE WATER
- SURFACE WATER FEATURES
- LAKES/RESERVOIRS
- ATMOSPHERE
- ATMOSPHERIC CHEMISTRY
- CARBON AND HYDROCARBON COMPOUNDS
- METHANE
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 6 companion files.
- atqasuk.kml
- northern_seward_peninsula.kml
- barrow_peninsula.kml
- fairbanks.kml
- SAR_Methane_Ebullition_AK.pdf
- toolik.kml