georefid:2005-035033SEDIS 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=2005-035033<gco:CharacterString>Paleoceanographic change during the middle Miocene climate revolution; an Antarctic stable isotope perspective</gco:CharacterString>2004-01-01publicationgeorefid:2005-035033Shevenell, A. E.University of California at Santa Barbara, Department of Geological Sciences, Santa Barbara, CA, United StatesauthorKennett, J. P.University of California at Santa Barbara, United StatesauthorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentHardcopyIn: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica151235-251Ocean circulation and atmospheric pCO (sub 2) variations have been cited as potential mechanisms driving middle Miocene cooling and Antarctic cryosphere expansion. Well-dated high latitude benthic foraminifer stable isotope records from the South Tasman Rise (STR; ODP Sites 1170 and 1171) exhibit familiar patterns of long and short term middle Miocene climate change and inferred carbon cycle dynamics. Integrated STR and southwest Pacific stable isotope time series and time slice data indicate regional ocean circulation changes commensurate with the middle Miocene global climate transition. STR stable isotopes and southwest Pacific meridional (super 13) C gradients suggest that Warm Saline Deep Water from the Tethys Sea dominated regional bottom waters between 16.8 and 16.2 Ma, during the peak of the Miocene Climatic Optimum (MCO), and exerted intermittent influence on the STR until the end of the MCO. Southern Ocean derived Southern Component Water influenced the STR beginning at 16.2 Ma and dominated the southwest Pacific from 14.9 to 14.2 Ma and 13.8 to 12 Ma. (modif. j. abstr.)completedStratigraphyalgaeAnomalinidaeAntarctic ice sheetAntarcticaatmospherebiostratigraphyC-13/C-12carboncarbon cyclecarbon dioxideCassidulinaceaCenozoicCibicidoidesclimate changecoolingEast Antarctic ice sheetForaminiferageochemical cyclegreenhouse effectIndian OceanInvertebrataisotope ratiosisotopesLeg 189magnetostratigraphymicrofossilsmiddle MioceneMiocenenannofossilsNeogeneO-18/O-16ocean circulationOcean Drilling ProgramODP Site 1170ODP Site 1171oxygenPacific Oceanpaleo-oceanographypaleoclimatologyplanktonic taxaPlantaeProtistaRotaliinaSouth PacificSouth Tasman RiseSouthern OceanSouthwest Pacificstable isotopesTertiaryTethysWest Pacificurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1170urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1171urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignEnglishgeoscientificInformation146.0200149.0700-48.3000-47.0900