eCite Digital Repository

Late Quaternary palaeoceanography of the Circumpolar Deep Water from the South Tasman Rise

Citation

Moy, AD and Howard, W and Gagan, MK, Late Quaternary palaeoceanography of the Circumpolar Deep Water from the South Tasman Rise, Journal of Quaternary Science, 21, (7) pp. 763-777. ISSN 0267-8179 (2006) [Refereed Article]

DOI: doi:10.1002/jqs.1067

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). The similarity of benthic δ13C records at the STR to the equatorial Pacific suggest the Southern Ocean deep-water mass closely tracked those of the deep Pacific, and the presence of a δ13C gradient between the STR and the equatorial Atlantic suggests there was continual production of northern source deep water over the past 160 k yr. Copyright © 2006 John Wiley & Sons, Ltd.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Other Earth Sciences
Research Field:Earth Sciences not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Moy, AD (Dr Andrew Moy)
Author:Howard, W (Associate Professor William Howard)
ID Code:42060
Year Published:2006
Web of Science® Times Cited:15
Deposited By:IASOS
Deposited On:2006-08-01
Last Modified:2007-05-02
Downloads:0

Repository Staff Only: item control page