남극 맥스웰만의 큰띠조개에 대한 안정동위원소와 미량원소 성분을 이용한 과거 고해양변화 연구

Title
남극 맥스웰만의 큰띠조개에 대한 안정동위원소와 미량원소 성분을 이용한 과거 고해양변화 연구
Alternative Title
Stable isotopic and trace elemental compositions of the Antarctic bivalve in Maxwell Bay, King George Island, Antarctica: Implications for meltwater histories.
Author(s)
김진경; 우경식; 이재일; 임현수; 유규철; 윤호일; 길영우
Publication Year
2010-08-31
Abstract
The gravity core was obtained from the slope of the South Scotia Sea, West Antarctica. Core sediments are mainly composed of laminated diatomaceous ooze and homogeneous silty clay. Stratigraphy is based on total organic carbon content and magnetic susceptibility with five radiocarbon dates. Oxygen, carbon and nitrogen isotopes of diatoms and diatom-bound organic matter are analyzed. The δ18O record show that the ~1.5‰ variations in Last Glacial to Holocene reflect the isotopic composition changes of surface seawater. It also shows that the transient depleted signals during deglaciation may imply the melt-water input. The δ13C values are depleted during Last Glacial relative to the Holocene, which indicate lower productivity during cold period. The anti-correlation patterns between δ15N and δ13C values during Last Glacial and Neoglacial periods may result from the restricted vertical mixing due to the sea ice extension.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28782
Bibliographic Citation
10th International Conference on Paleoceanography, pp.16, 2010
Publisher
ICP
Type
Conference
Language
English
Publisher
ICP
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