Ennyu, Atsuhito; Arthur, Michael A. (2004): Early to middle Miocene paleoceanography in the southern high latitudes off Tasmania. 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, 215-233, georefid:2005-035032

Abstract:
Paleoclimate proxy records from the southern high latitudes can provide key constraints on the possible role of ocean circulation as a cause of the middle Miocene global cooling event and the major development of the Antarctic cryosphere. Paleotemperature reconstructions based on (super 18) O values of calcareous plankton suggest that the warm-season, near-surface waters in the subantarctic around the site paleo-locations were warmer than today by 2-4 degrees C until about 14 Ma. The sea-surface temperatures were probably ameliorated by a warm current from the west that joined the Circum-Antarctic current. The cold season near-surface temperatures were unaffected during this interval. Based on the Miocene plankton and benthic stable isotope records, we suggest that the cooled surface waters in the southern high latitudes contributed to the increased rate of production and dominance of cold southern-component deepwater after ca. 14.5 Ma. (modif. j. abstr.)
Coverage:
West: 146.0200 East: 149.5600 North: -43.5700 South: -47.1000
Relations:
Expedition: 189
Site: 189-1170
Site: 189-1172
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=2005-035032 (c.f. for more detailed metadata)
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