A geochemical boundary in the East Sea (Sea of Japan): Implications for the paleoclimatic record SCOPUS KCI OTHER

Title
A geochemical boundary in the East Sea (Sea of Japan): Implications for the paleoclimatic record
Author(s)
Han, S.-J.; Hyun, S.; Huh, S.; Chun, J.-H.
KIOST Author(s)
Hyun, Sangmin(현상민)
Publication Year
2002-06
Abstract
Sediment from six piston cores from the East Sea (Sea of Japan) was analyzed for evidence of paleoceanographic changes and paleoclimatic variation. A distinct geochemical boundary is evident in major element concentrations and organic carbon content of most cores near the 10-ka horizon. This distinctive basal Holocene change is interpreted to be largely the result of changing sediment sources, an interpretation supported by TiO2/Al2O3 ratios. Organic carbon and carbonate contents also differ significantly between the Holocene and glacial intervals. The C/N ratio of organic matter is greater than 10 during the glacial period, but is less than 10 for the Holocene, suggesting that the influx of terrigenous organic matter was more volumetrically important than marine organic matter during glacial times. The chemical index of weathering (CIW) is higher for the Holocene than the glacial interval, and changes markedly at the basal Holocene geochemical boundary. Silt fractions are higher in the glacial interval, suggesting a strong effect of climate on silt particle transportation: terrigenous aluminosilicates and continental organic carbon transport were higher during glacial times than during the Holocene. Differences in sediment composition between the Holocene and glacial period are interpreted to have been climatically induced.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5786
DOI
10.4217/OPR.2002.24.2.167
Bibliographic Citation
Ocean and Polar Research, v.24, no.2, pp.167 - 175, 2002
Publisher
Korea Ocean Research and Development Institute
Keywords
CIW; Climatic change; Geochemical boundary; Holocene
Type
Article
Language
English
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Marine environmentology,Marine environmentology,Organic chemistry,해양환경학,화학해양학,유기화학

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