Shevenell, A. E. and Kennett, J. P. (2004): Paleoceanographic change during the middle Miocene climate revolution; an Antarctic stable isotope perspective
Leg/Site/Hole:
Related Expeditions:
ODP 189
Identifier:
ID:
2005-035033
Type:
georefid
Creator:
Name:
Shevenell, A. E.
Affiliation:
University of California at Santa Barbara, Department of Geological Sciences, Santa Barbara, CA, United States
Role:
author
Name:
Kennett, J. P.
Affiliation:
University of California at Santa Barbara, United States
Role:
author
Identification:
Title:
Paleoceanographic change during the middle Miocene climate revolution; an Antarctic stable isotope perspective
Year:
2004
Source:
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
Publisher:
American Geophysical Union, Washington, DC, United States
Volume:
151
Issue:
Pages:
235-251
Abstract:
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.)
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:-47.0900 West:146.0200 East:
149.0700 South:-48.3000
Keywords: Stratigraphy; algae; Anomalinidae; Antarctic ice sheet; Antarctica; atmosphere; biostratigraphy; C-13/C-12; carbon; carbon cycle; carbon dioxide; Cassidulinacea; Cenozoic; Cibicidoides; climate change; cooling; East Antarctic ice sheet; Foraminifera; geochemical cycle; greenhouse effect; Indian Ocean; Invertebrata; isotope ratios; isotopes; Leg 189; magnetostratigraphy; microfossils; middle Miocene; Miocene; nannofossils; Neogene; O-18/O-16; ocean circulation; Ocean Drilling Program; ODP Site 1170; ODP Site 1171; oxygen; Pacific Ocean; paleo-oceanography; paleoclimatology; planktonic taxa; Plantae; Protista; Rotaliina; South Pacific; South Tasman Rise; Southern Ocean; Southwest Pacific; stable isotopes; Tertiary; Tethys; West Pacific;
.