Not logged in
Data Publisher for Earth & Environmental Science

Römer, Miriam; Torres, Marta E; Kasten, Sabine; Kuhn, Gerhard; Graham, Alastair GC; Mau, Susan; Little, Crispin T S; Linse, Katrin; Pape, Thomas; Geprägs, Patrizia; Fischer, David; Wintersteller, Paul; Marcon, Yann; Rethemeyer, Janet; Bohrmann, Gerhard; Shipboard scientific party ANT-XXIX/4 (2014): Active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia. doi:10.1594/PANGAEA.835302,
Supplement to: Römer, M et al. (2014): First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia. Earth and Planetary Science Letters, 403, 166-177, doi:10.1016/j.epsl.2014.06.036

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

An extensive submarine cold-seep area was discovered on the northern shelf of South Georgia during R/V Polarstern cruise ANT-XXIX/4 in spring 2013. Hydroacoustic surveys documented the presence of 133 gas bubble emissions, which were restricted to glacially-formed fjords and troughs. Video-based sea floor observations confirmed the sea floor origin of the gas emissions and spatially related microbial mats. Effective methane transport from these emissions into the hydrosphere was proven by relative enrichments of dissolved methane in near-bottom waters. Stable carbon isotopic signatures pointed to a predominant microbial methane formation, presumably based on high organic matter sedimentation in this region. Although known from many continental margins in the world's oceans, this is the first report of an active area of methane seepage in the Southern Ocean. Our finding of substantial methane emission related to a trough and fjord system, a topographical setting that exists commonly in glacially-affected areas, opens up the possibility that methane seepage is a more widespread phenomenon in polar and sub-polar regions than previously thought.
Related to:
Bohrmann, Gerhard; Shipboard scientific party ANT-XXIX/4 (2014): Profile of sediment echo sounding during POLARSTERN cruise ANT-XXIX/4 with links to ParaSound data files. MARUM - Center for Marine Environmental Sciences, University Bremen, doi:10.1594/PANGAEA.835507
Median Latitude: -54.205238 * Median Longitude: -36.476775 * South-bound Latitude: -54.467308 * West-bound Longitude: -38.139610 * North-bound Latitude: -53.769920 * East-bound Longitude: -35.746135
Date/Time Start: 2013-03-22T00:00:00 * Date/Time End: 2013-04-16T00:00:00
5 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text (use the following character encoding: )