Potential Areas of Gas Seepage Detected by SAR in Lakes near Fairbanks, Alaska

Description

This dataset includes maps and locations of potential gas seepage in lakes within the immediate and surrounding area around Fairbanks, Alaska, a region underlain by discontinuous permafrost and characterized by thermokarst lake formation. Gas bubbling from lakes in the Fairbanks area is usually rich in methane, a potent greenhouse gas that is difficult to quantify. A new remote sensing method was used for detecting potential gas seepage, defined as areas of suspected perennial ebullition, by using a previously ground-truthed seep that appeared as a high-backscatter perennial feature in winter L-band Synthetic Aperture Radar (SAR) data from 2006-2011. Based on threshold values determined by the sigma-naught backscatter of this training seep, 1,690 areas of potential seepage were detected in 459 lakes out of 658 lakes analyzed. Results were validated through a different ground-truthed seep. The data are provided in shapefile format.

Resources

Name Format Description Link
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DGas_Seeps_Lakes_Fairbanks_SAR_2394%26ac%3Dtrue
5 https://daac.ornl.gov%2FABOVE%2Fguides%2FGas_Seeps_Lakes_Fairbanks_SAR.html
5 https://doi.org%2F10.3334%2FORNLDAAC%2F2394
5 https://daac.ornl.gov%2FABOVE%2Fguides%2FGas_Seeps_Lakes_Fairbanks_SAR_Fig1.jpg
5 https://above.nasa.gov%2F
5 https://data.ornldaac.earthdata.nasa.gov%2Fpublic%2Fabove%2FGas_Seeps_Lakes_Fairbanks_SAR%2Fcomp%2FGas_Seeps_Lakes_Fairbanks_SAR.pdf
5 https://data.ornldaac.earthdata.nasa.gov%2Fprotected%2Fbundle%2FGas_Seeps_Lakes_Fairbanks_SAR_2394.zip
5 https://search.earthdata.nasa.gov/search?q=Gas_Seeps_Lakes_Fairbanks_SAR_2394&ac=true
21 https://doi.org/10.3334/ORNLDAAC/2394
57 Gas_Seeps_Lakes_Fairbanks_SAR_2394.zip https://data.ornldaac.earthdata.nasa.gov/protected/bundle/Gas_Seeps_Lakes_Fairbanks_SAR_2394.zip
5 https://above.nasa.gov/
5 https://above.nasa.gov
22 Gas_Seeps_Lakes_Fairbanks_SAR_Fig1.jpg https://daac.ornl.gov/ABOVE/guides/Gas_Seeps_Lakes_Fairbanks_SAR_Fig1.jpg
33 Gas_Seeps_Lakes_Fairbanks_SAR.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/Gas_Seeps_Lakes_Fairbanks_SAR/comp/Gas_Seeps_Lakes_Fairbanks_SAR.pdf
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C3436677597-ORNL_CLOUD.iso19115

Tags

  • earth-science-snow-ice-cryosphere-lake-ice
  • earth-science-climate-feedbacks-climate-indicators-cryospheric-feedbacks
  • earth-science-frozen-ground-cryosphere-permafrost
  • earth-science-ecosystems-biosphere-freshwater-ecosystems-lake-pond
  • earth-science-water-quality-water-chemistry-terrestrial-hydrosphere-gases
  • earth-science-paleoclimate-indicators-climate-indicators-permafrost-methane-release

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