Shevenell, A. E.; Kennett, J. P. (2004): Paleoceanographic change during the middle Miocene climate revolution; an Antarctic stable isotope perspective. American Geophysical Union, Washington, DC, United States, In: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica, 151, 235-251, georefid:2005-035033

Ocean 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.)
West: 146.0200 East: 149.0700 North: -47.0900 South: -48.3000
Expedition: 189
Site: 189-1170
Site: 189-1171
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Provider: SEDIS Publication Catalogue
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