Climatically driven emissions of hydrocarbons from marine sediments during deglaciation
Hill, T. M.
Kennett, J. P.
Valentine, David L.
Reddy, Christopher M.
Nelson, Robert K.
Behl, R. J.
MetadataShow full item record
Marine hydrocarbon seepage emits oil and gas, including methane (~30 Tg CH4/year), to the ocean and atmosphere. Sediments from the California margin contain preserved tar, primarily formed via hydrocarbon weathering at the sea surface. We present a record of variation in the abundance of tar in sediments for the past 32ky, providing evidence for increases in hydrocarbon emissions prior to and during Termination IA (16-14 ka) and again over Termination IB (11-10 ka). Our study provides the first direct evidence for increased hydrocarbon seepage associated with deglacial warming via tar abundance in marine sediments, independent of previous geochemical proxies. Climate-sensitive gas hydrates may modulate thermogenic hydrocarbon seepage during deglaciation.
Author Posting. © The Authors, 2006. This is the author's version of the work. It is posted here by permission of National Academy of Sciences for personal use, not for redistribution. The definitive version was published in Proceedings of the National Academy of Sciences of the United States of America 103 (2006): 13570-13574, doi:10.1073/pnas.0601304103.
Showing items related by title, author, creator and subject.
Analysis of unresolved complex mixtures of hydrocarbons extracted from Late Archean sediments by comprehensive two-dimensional gas chromatography (GC×GC) Ventura, Gregory T.; Kenig, Fabien; Reddy, Christopher M.; Frysinger, Glenn S.; Nelson, Robert K.; Van Mooy, Benjamin A. S.; Gaines, Richard B. (2008-03)Hydrocarbon mixtures too complex to resolve by traditional capillary gas chromatrography display gas chromatograms with dramatically rising baselines or “humps” of coeluting compounds that are termed unresolved complex ...
Improving oceanic overflow representation in climate models : the Gravity Current Entrainment Climate Process Team Legg, Sonya; Ezer, Tal; Jackson, Laura; Briegleb, Bruce P.; Danabasoglu, Gokhan; Large, William G.; Wu, Wanli; Chang, Yeon; Ozgokmen, Tamay M.; Peters, Hartmut; Xu, Xiaobiao; Chassignet, Eric P.; Gordon, Arnold L.; Griffies, Stephen; Hallberg, Robert; Price, James F.; Riemenschneider, Ulrike; Yang, Jiayan (American Meteorological Society, 2009-05)Oceanic overflows are bottom-trapped density currents originating in semienclosed basins, such as the Nordic seas, or on continental shelves, such as the Antarctic shelf. Overflows are the source of most of the abyssal ...
Pan American Climate Study (PACS) mooring deployment cruise report : R/V Roger Revelle cruise number Genesis 4, 9 April-5 May 1997 Way, Bryan S.; Ostrom, William M.; Weller, Robert A.; Ware, Jonathan D.; Trask, Richard P.; Cole, Rick; Donovan, Jeff (Woods Hole Oceanographic Institution, 1998-04)Three surface moorings were deployed in the eastern equatorial Pacifc from the R/V Roger Revelle as part of the Pan American Climate Study (PACS). PACS is a NOAA-funded study with the goal of investigating links between ...