ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010

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.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F1790
25 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: atqasuk.kml https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/atqasuk.kml
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/SAR_Methane_Ebullition_AK/
25 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: barrow_peninsula.kml https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/barrow_peninsula.kml
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1790
25 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: northern_seward_peninsula.kml https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/northern_seward_peninsula.kml
25 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: toolik.kml https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/toolik.kml
21 ABoVE project site https://above.nasa.gov
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/SAR_Methane_Ebullition_AK.html
33 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: SAR_Methane_Ebullition_AK.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/SAR_Methane_Ebullition_AK.pdf
25 ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010: fairbanks.kml https://data.ornldaac.earthdata.nasa.gov/public/above/SAR_Methane_Ebullition_AK/comp/fairbanks.kml
34 SAR-based lake ebullition maps. Panel A shows Alaska study regions with SAR footprints outlined in yellow. Subsequent panels show SAR-based CH4 ebullition maps for B) Barrow Peninsula, C) Atqasuk, D) Toolik, E) northern Seward Peninsula, and F) Fairbanks. Study lakes with field-based measurements are outlined (B,C) or boxed (D,E,F) in white. Orange boxes in panel F indicate anthropogenic study lakes. Source: Engram et al. (2020). https://daac.ornl.gov/ABOVE/guides/SAR_Methane_Ebullition_AK_Fig1.png

Tags

  • snow-ice
  • surface-water
  • atmosphere
  • terrestrial-hydrosphere
  • atmospheric-chemistry
  • earth-science

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