georefid:2005-048043SEDIS 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.1109004<gco:CharacterString>Rapid acidification of the ocean during the Paleocene-Eocene Thermal Maximum</gco:CharacterString>2005-01-01publicationgeorefid:2005-048043doi:10.1126/science.1109004Zachos, James C.University of California at Santa Cruz, Earth Sciences Department, Santa Cruz, CA, United StatesauthorRoehl, UrsulaUniversity of Bremen, Federal Republic of GermanyauthorSchellenberg, Stephen A.San Diego State University, United StatesauthorSluijs, AppyUtrecht University, NetherlandsauthorHodell, David A.University of Florida, United StatesauthorKelly, Daniel C.University of Wisconsin at Madison, United StatesauthorThomas, EllenWesleyan University, United StatesauthorNicolo, MicahRice University, United StatesauthorRaffi, IsabellaUniversitario G. D'Annunzio, ItalyauthorLourens, Lucas J.Vrije Universiteit, NetherlandsauthorMcCarren, HeatherauthorKroon, DickauthorAmerican Association for the Advancement of Science, Washington, DC, United StatespublisherdocumentDigitalScience308 (5728)1611-1615The Paleocene-Eocene thermal maximum (PETM) has been attributed to the rapid release of approximately 2000 X 10 (super 9) metric tons of carbon in the form of methane. In theory, oxidation and ocean absorption of this carbon should have lowered deep-sea pH, thereby triggering a rapid (<10,000-year) shoaling of the calcite compensation depth (CCD), followed by gradual recovery. Here we present geochemical data from five new South Atlantic deep-sea sections that constrain the timing and extent of massive sea-floor carbonate dissolution coincident with the PETM. The sections, from between 2.7 and 4.8 kilometers water depth, are marked by a prominent clay layer, the character of which indicates that the CCD shoaled rapidly (<10,000 years) by more than 2 kilometers and recovered gradually (>100,000 years). These findings indicate that a large mass of carbon (>2000 X 10 (super 9) metric tons of carbon) dissolved in the ocean at the Paleocene-Eocene boundary and that permanent sequestration of this carbon occurred through silicate weathering feedback.completedStratigraphyacidificationaliphatic hydrocarbonsalkanesAtlantic OceanC-13/C-12carboncarbonate compensation depthCenozoicDeep Sea Drilling ProjectEocenehydrocarbonsIPODisotope ratiosisotopesLeg 208Leg 74marine environmentmethaneOcean Drilling Programorganic compoundspaleo-oceanographyPaleocenePaleocene-Eocene Thermal MaximumpaleoclimatologypaleoenvironmentPaleogenepaleotemperaturePETMsea-surface temperatureSouth Atlanticstable isotopesTertiaryurn:org.iodp:exp:208urnlargerWorkCitationcampaignurn:org.iodp:exp:74urnlargerWorkCitationcampaignEnglishgeoscientificInformation1.30003.1000-30.1000-27.0000application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.sciencemag.org/content/308/5728/1611.full.pdfdownload