Abrupt SST changes during the MIS 6 and 2 in East Sea (Japan Sea): paleoceanographic implication

Title
Abrupt SST changes during the MIS 6 and 2 in East Sea (Japan Sea): paleoceanographic implication
Author(s)
현상민; J.M. Kim; 심원준; 임운혁; S.H. Yoon; K.S. Woo; 석봉출
KIOST Author(s)
Hyun, Sang Min(현상민)Shim, Won Joon(심원준)Yim, Un Hyuk(임운혁)
Publication Year
2006-09-03
Abstract
Stable oxygen isotope compositions of foraminifera and alkenones variation of a piston core (M04-PC1A) were conducted to elucidate the evolution of paleoceanography of the East Sea (Japan Sea). Paleoenvironmental change since the late ~ 320 ka were reconstructed based on the oxygen isotope compositions of forminifera and alkenons data from the deep-sea sediments of the piston core taken from the Korea Plateau in the East Sea (Japan Sea). Oxygen isotopic records of the planktonic foraminifera, that were estimated to be ca. 320 ka in age, show the Marine Isotope Stage (MIS) from 1 to 8. Comparing this result with previously reported stable isotope data in the East Sea as well as the glacial oxygen isotope trend, it is suggested that paleoceanographic and paleoclimatic changes in the East Sea has been quite different from those of open oceans: it reserves freshwater input signals and steep drop of paleotemperature (about 2 per mil heavier) at the MSI 2.1 and ^.2, respectively. Paleotemperature variations of the sutface water in the East Sea were reconstructed using unsaturated longchain alkenones (ULA) along with oxygen isotope data. The result shows that paleotemperature was about 10℃ lower than today's surface temperature during the MIS 6.2. However, paleotemperature during the MIS 2.2 was characterized by relatively small temperature drop of about 3℃. Both oxygen isotope and ULA data show the systematic coeval trend throughout the late Quaternary. These data suggesting local oceanographic conditions were more distinctive feature and have prevailed since the MIS 6 in the East Sea
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/30910
Bibliographic Citation
International Symposium og IGCP-476, pp.25, 2006
Publisher
International Symposium og IGCP-476
Type
Conference
Language
English
Publisher
International Symposium og IGCP-476
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

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