Skip to main content
U.S. flag

An official website of the United States government

Towards determining spatial methane distribution on Arctic permafrost bluffs with an unmanned aerial system

March 12, 2019

Arctic permafrost stores vast amounts of methane (CH4) in subsurface reservoirs. Thawing permafrost creates areas for this potent greenhouse gas to be released to the atmosphere. Identifying ‘hot spots’ of methane flux on a local scale has been limited by the spatial scales of traditional ground-based or satellite-based methane-sampling methods. Here we present a reliable and an easily replicable design using only off-the-shelf, cost-effective methane sensor components and an Unmanned Aerial System (UAS). Our results demonstrate the high efficiency of the design and the advantages of this methodology for environmental methane studies that are subjected to the high spatial variability of methane levels. On Barter Island, NE Alaska, we noted spikes in CH4 concentrations coincident with topographic features or anomalies. Such spikes may be attributed to enhanced land/air transfer and may reveal zones of high methane production and/or minimal oxidation in areas of thermoerosional gullies along thawing coastal zones. Thermoerosional gullies represent hotspots that release significantly higher levels of methane than the surrounding areas, thus suggesting that point sampling is inadequate in characterizing methane releases and that increasing rates of permafrost thaw may result in increasing point sources of high CH4 emissions.

Citation Information

Publication Year 2019
Title Towards determining spatial methane distribution on Arctic permafrost bluffs with an unmanned aerial system
DOI 10.1007/s42452-019-0242-9
Authors Ferdinand K. J. Oberle, Ann E. Gibbs, Bruce M. Richmond, Li H. Erikson, Mark P. Waldrop, Peter W. Swarzenski
Publication Type Article
Publication Subtype Journal Article
Series Title SN Applied Sciences
Index ID 70202576
Record Source USGS Publications Warehouse
USGS Organization Pacific Coastal and Marine Science Center