georefid:2007-021984SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1029/2005PA001163<gco:CharacterString>Enhanced terrestrial weathering/runoff and surface ocean carbonate production during the recovery stages of the Paleocene-Eocene thermal maximum</gco:CharacterString>2005-01-01publicationgeorefid:2007-021984doi:10.1029/2005PA001163Kelly, D. ClayUniversity of Wisconsin at Madison, Department of Geology and Geophysics, Madison, WI, United StatesauthorZachos, James C.University of California at Santa Cruz, United StatesauthorBralower, Timothy J.Pennsylvania State University, United StatesauthorSchellenberg, Stephen A.San Diego State University, United StatesauthorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentDigitalPaleoceanography20 (4)PA4023The carbonate saturation profile of the oceans shoaled markedly during a transient global warming event known as the Paleocene-Eocene thermal maximum (PETM) (circa 55 Ma). The rapid release of large quantities of carbon into the ocean-atmosphere system is believed to have triggered this intense episode of dissolution along with a negative carbon isotope excursion (CIE). The brevity (120-220 kyr) of the PETM reflects the rapid enhancement of negative feedback mechanisms within Earth's exogenic carbon cycle that served the dual function of buffering ocean pH and reducing atmospheric greenhouse gas levels. Detailed study of the PETM stratigraphy from Ocean Drilling Program Site 690 (Weddell Sea) reveals that the CIE recovery period, which postdates the CIE onset by approximately 80 kyr, is represented by an expanded ( approximately 2.5 m thick) interval containing a unique planktic foraminiferal assemblage strongly diluted by coccolithophore carbonate. Collectively, the micropaleontological and sedimentological changes preserved within the CIE recovery interval reflect a transient state when ocean-atmosphere chemistry fostered prolific coccolithophore blooms that suppressed the local lysocline to relatively deeper depths. (mod. journ. abst.)completedStratigraphyIsotope geochemistryalgaeassemblagesC-13/C-12carbonCenozoicEoceneForaminiferaInvertebrataisotope ratiosisotopesLeg 113microfossilsnannofossilsO-18/O-16Ocean Drilling ProgramODP Site 690oxygenPaleocenePaleocene-Eocene thermal maximumpaleoclimatologypaleoecologypaleoenvironmentPaleogenePlantaeproductivityProtistaquantitative analysisrunoffSouthern Oceanstable isotopesterrestrial environmentTertiaryweatheringWeddell Seaurn:org.iodp:exp:113urnlargerWorkCitationcampaignurn:org.iodp:exp:113:site:690urnlargerWorkCitationstudyurn:org.iodp:exp:113urnlargerWorkCitationcampaignEnglishgeoscientificInformation1.12181.1218-65.0938-65.0937application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www.agu.org/journals/pa/pa0504/2005PA001163/2005PA001163.pdfdownload