georefid:2005-048138SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1126/science.1109202<gco:CharacterString>Deep-sea temperature and circulation changes at the Paleocene-Eocene Thermal Maximum</gco:CharacterString>2005-01-01publicationgeorefid:2005-048138doi:10.1126/science.1109202Tripati, AradhnaUniversity of Cambridge, Department of Earth Sciences, Cambridge, United KingdomauthorElderfield, HenryauthorAmerican Association for the Advancement of Science, Washington, DC, United StatespublisherdocumentDigitalScience308 (5730)1894-1898A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4 degrees to 5 degrees C, similar to tropical and subtropical surface ocean waters, implying no amplification of warming in high-latitude regions of deep-water formation under ice-free conditions. Intermediate waters warmed before the carbon isotope excursion, in association with downwelling in the North Pacific and reduced Southern Ocean convection, supporting changing circulation as the trigger for methane hydrate release. A switch to deep convection in the North Pacific at the PETM onset could have amplified and sustained warming.completedStratigraphyAtlantic OceanbiostratigraphyC-13/C-12carbonCenozoicDeep Sea Drilling Projectdeep-sea environmentDSDP Site 527EoceneForaminiferaInvertebrataIPODisotope ratiosisotopesLeg 143Leg 198Leg 74marine environmentmicrofossilsNorth PacificNorthwest PacificO-18/O-16Ocean Drilling ProgramODP Site 1209ODP Site 865oxygenPacific Oceanpaleo-oceanographyPaleocenePaleocene-Eocene Thermal MaximumpaleocirculationpaleoclimatologyPaleogenepaleotemperaturePETMProtistaShatsky RiseSouth AtlanticSouthern Oceanstable isotopesTertiaryWalvis RidgeWest Pacificurn:org.iodp:exp:143urnlargerWorkCitationcampaignurn:org.iodp:exp:198urnlargerWorkCitationcampaignurn:org.iodp:exp:74urnlargerWorkCitationcampaignurn:org.iodp:exp:74:site:527urnlargerWorkCitationstudyurn:org.iodp:exp:74urnlargerWorkCitationcampaignurn:org.iodp:exp:198:site:1209urnlargerWorkCitationstudyurn:org.iodp:exp:198urnlargerWorkCitationcampaignurn:org.iodp:exp:143:site:865urnlargerWorkCitationstudyurn:org.iodp:exp:143urnlargerWorkCitationcampaignEnglishgeoscientificInformation-179.3321158.3100-28.023032.4000application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.sciencemag.org/content/308/5730/1894.full.pdfdownload