creators_name: Howard, WR creators_name: Moy, AD creators_name: Gagan, MK creators_id: Will.Howard@utas.edu.au creators_id: creators_id: type: article datestamp: 2008-04-29 12:41:04 lastmod: 2008-07-18 10:54:32 metadata_visibility: show title: Late quaternary palaeoceanography of the circumpolar deep water from the South Tasman Rise ispublished: pub subjects: 260399 subjects: 269999 subjects: 260499 subjects: 260111 full_text_status: restricted keywords: Benthic foraminiferal stable isotopes; Circumpolar deep water; Deep-water circulation; Palaeoceanography; Southern Ocean note: Copyright © 2006 John Wiley & Sons, Ltd. abstract: We use sediment cores from the South Tasman Rise (STR) to reconstruct deepwater circulation in the southwest Pacific sector of the Southern Ocean. Sediment cores MD972106 (45° 09′ S, 146° 17′ E, 3310 m water depth) and GC34 (45° 06′ S, 147° 45′ E, 4002 m water depth) preserve records covering the last 160 k yr, with chronology controlled by calibrated accelerator mass spectrometry radiocarbon dates and benthic foraminiferal δ18O tied to SPECMAP. The STIR benthic foraminiferal δ13C records provide new δ13C values for Southern Ocean deep water spanning the last 160 kyr at sites unlikely to be affected by variations in productivity. The records establish that glacial benthic foraminifera (Cibicidoides spp.) δ13C values are lower relative to interglacial values and are comparable to previous glacial benthic δ13C records in the Indian and Pacific sectors of the Southern Ocean. Comparisons of the benthic foraminiferal δ 13C time series at the STR are made with the equatorial Pacific (V19-30 and Site 846) and the equatorial Atlantic (GeoB1115). 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