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Intense winter cooling of the surface water in the northern Okinawa Trough during the last glacial period

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/53019

Title: Intense winter cooling of the surface water in the northern Okinawa Trough during the last glacial period
Authors: Yamamoto, Masanobu Browse this author →KAKEN DB
Kishizaki, Midori Browse this author
Oba, Tadamichi Browse this author
Kawahata, Hodaka Browse this author
Keywords: TEX86
MD98-2195
The East China Sea
Okinawa Trough
LGM
Winter monsoon
Temperature
The last glacial period
Issue Date: 5-Jun-2013
Publisher: Elsevier
Journal Title: Journal of Asian Earth Sciences
Volume: 69
Start Page: 86
End Page: 92
Publisher DOI: 10.1016/j.jseaes.2012.06.011
Abstract: We generated a 42,000-year record of TEX86 (TEX86L and TEX86H) from core MD98-2195 to better understand changes in the hydrology of the East China Sea (ECS) in the last glacial period. The TEX86-derived temperature showed an intense cooling in the last glacial period, whereas U-37(K)-derived spring sea surface temperature (SST) and foraminiferal Mg/Ca-derived summer SST showed a much smaller-scale cooling. The difference between the TEX86- and Mg/Ca-derived temperatures was around 14 degrees C from 19 to 16 ka and abruptly decreased to around 5 degrees C from 16 to 13 ka. This suggests a strong winter cooling of the surface water during the last glacial period. TEX86-,U-37(K')-, and Mg/Ca-derived temperatures were lowest at 18-17 ka, implying that the formation of cold water was maximized during that period. These results show that the cold water mass developed in the northern Okinawa Trough during the last glacial and the Kuroshio branch did not fully enter the northern margin of the Okinawa Trough. (c) 2012 Elsevier Ltd. All rights reserved.
Type: article (author version)
URI: http://hdl.handle.net/2115/53019
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山本 正伸

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