Stable isotope record and depositional environments in the Antarctic Polar Front of Drake Passage, Western Antarctica SCOPUS KCI OTHER

Title
Stable isotope record and depositional environments in the Antarctic Polar Front of Drake Passage, Western Antarctica
Author(s)
Bae, S.H.; Yoon, H.I.; Park, B.-K.; Kang, C.Y.
Publication Year
2002
Abstract
A high-resolution study including oxygen and carbon stable isotopes as well as planktonic foraminifera, carbonate, ice-rafted debris (IRD) contents, were performed on one core sediment (DP00-02) taken from the seamount top near Antarctic Polar Front (APF) in the Drake Passage, Western Antarctica. Based on the oxygen stable isotope records measured on Neogloboquadrina pachyderma (sin.), this sediment core is interpreted to represent a stratigraphic record back to the lower isotope stage 5 (-129 kyr). Isotope stages 5, 4 and 1 show a high abundance of carbonate and planktonic foraminifer with relatively low IRD content. In contrast, isotope stages 3 and 2 are characterized by low abundance of carbonate with remarkably high IRD content. This is probably attributed by a local/regional influence due to front structural changes, related to the fluctuation of APF, i.e., the south and northward migration of polar water mass. The glacial-interglacial shifts in δ 18 O values of N. pachyderma (sin.) may reach up to 1 to 1.2‰ indicating that, global ice volume changes have affected the isotope records. However, the isotope stage 3, generally interpreted as the less warmer period in the global record than Holocene and stage 5, corresponds to much lighter values compared to the global climate curve. This may be resulted from change in the salinity rather than change in the global ice volume or the temperature.
ISSN
1226-4806
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5757
DOI
10.1007/BF03028282
Bibliographic Citation
Geosciences Journal, v.6, no.2, pp.117 - 123, 2002
Publisher
Korean Association of Geoscience Societies
Keywords
Antarctic Polar Front; Antarctica; Drake Passage; Stable oxygen isotope
Type
Article
Language
English
Document Type
Article
Publisher
Korean Association of Geoscience Societies
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