ABoVE: Methane Ebullition Hotspots in Frozen Lakes near Fairbanks, Alaska, Oct 2014 : Arctic-Boreal Vulnerability Experiment (ABoVE)

• Main Authors: Anthony, K.W., Hanke, P., Lindgren, P.
• Format: Article in Journal/Newspaper
• Language: English
• Published: ORNL Distributed Active Archive Center 2021
• Subjects: CLIMATE INDICATORS, PALEOCLIMATE INDICATORS, PERMAFROST/METHANE RELEASE,; CRYOSPHERE, SNOW/ICE, LAKE ICE,; CLIMATE INDICATORS, TERRESTRIAL HYDROSPHERE INDICATORS, PERMAFROST MELT,; TERRESTRIAL HYDROSPHERE, SNOW/ICE, LAKE ICE,; ATMOSPHERE, ATMOSPHERIC CHEMISTRY, CARBON AND HYDROCARBON COMPOUNDS, METHANE; AIRCRAFT, CAMERAS; FIELD SURVEYS, GPS; frozen lakes; Alaska; orthorectified aerial photos; ebullition; Methane; Arctic; Fairbanks; Ice; permafrost
• Online Access: https://dx.doi.org/10.3334/ornldaac/1861; https://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1861

This dataset includes maps of the locations and number of methane ebullition hotspots in 15 frozen lakes in the southern portion of the Goldstream Valley and the surrounding landscape just north of Fairbanks, Alaska, USA. Hotspots were identified from early winter high resolution aerial photographs acquired three days after lake-ice formation in October 2014. Hotspot ebullition seeps are defined as point-sources of high ebullition that release methane from lake sediments year-round. High rates of bubbling impede ice formation. In early winter, bubbling leads to dark, round open holes in lake ice which were visible in the aerial photos. This project investigated the role of theromkarst lakes in thawing of permafrost and mobilization of organic carbon in frozen soils.