georefid:2008-062595SEDIS Publication Catalogue
ana.macario@awi.de
http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1130/G24332A.1<gco:CharacterString>Onset of long-term cooling of Greenland near the Eocene-Oligocene boundary as revealed by branched tetraether lipids</gco:CharacterString>2008-01-01publicationgeorefid:2008-062595doi:10.1130/G24332A.1Schouten, StefanRoyal Netherlands Institute for Sea Research, Department of Marine Biogeochemistry and Toxicology, Den Burg, NetherlandsauthorEldrett, JamesShell UK Exploration and Production, United KingdomauthorGreenwood, David R.Brandon University, CanadaauthorHarding, IanUniversity of Southampton, United KingdomauthorBaas, MarianneauthorSinninghe Damste, Jaap S.authorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyGeology (Boulder)36 (2)147-150The Eocene-Oligocene (E-O) boundary interval is considered to be one of the major transitions in Earth's climate, witnessing the first major expansion of the East Antarctic Ice Sheet. However, the extent of the associated climatic cooling, especially for high northern latitude continental landmasses, is poorly constrained. In this study we reconstruct the first mean annual air temperature (MAAT) for the Greenland landmass during the late Eocene and early Oligocene by applying a new proxy based on the distribution of branched tetraether lipids derived from soil bacteria preserved in a marine sediment core from the Greenland Basin. The temperature estimates are compared with a composite continental temperature record based on bio-climatic analysis of pollen assemblages. Both proxies reveal comparable late Eocene MAATs of approximately 13-15 degrees C and a gradual long-term cooling of approximately 3-5 degrees C starting near the E-O boundary. These data are in agreement with other MAAT reconstructions from northern midlatitude continents and suggest a general cooling of the Northern Hemisphere during the E-O transition.completedStratigraphyArctic OceanArctic regionCenozoicclimate changecoolingcoresEoceneethersfatty acidsgeochemistryglacial environmentglaciomarine environmentGreenlandGreenland Basinice raftingLeg 104Leg 151Leg 162lipidslower Oligocenemarine environmentmarine sedimentsmiosporesNorwegian SeaOcean Drilling ProgramODP Site 643ODP Site 913ODP Site 985Oligoceneorganic acidsorganic compoundspaleo-oceanographypaleoatmospherepaleoclimatologyPaleogenepalynomorphspollenpollen analysisreconstructionsediment transportsedimentstemperatureTertiaryupper Eoceneurn:org.iodp:exp:104urnlargerWorkCitationcampaignurn:org.iodp:exp:151urnlargerWorkCitationcampaignurn:org.iodp:exp:162urnlargerWorkCitationcampaignurn:org.iodp:exp:104:site:643urnlargerWorkCitationstudyurn:org.iodp:exp:104urnlargerWorkCitationcampaignurn:org.iodp:exp:151:site:913urnlargerWorkCitationstudyurn:org.iodp:exp:151urnlargerWorkCitationcampaignurn:org.iodp:exp:162:site:985urnlargerWorkCitationstudyurn:org.iodp:exp:162urnlargerWorkCitationcampaignEnglishgeoscientificInformation-6.56481.020066.562975.2921With GSA Data Repository Item 2008035