NDLI: Depositional environment in the southern Ulleung Basin, East Sea (Sea of Japan), during the last 48 000 years

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Acta Oceanologica Sinica : Volume 29, Issue 4, July 2010

Acta Oceanologica Sinica : Volume 29, Issue 3, May 2010

Acta Oceanologica Sinica : Volume 29, Issue 2, March 2010

Acta Oceanologica Sinica : Volume 29, Issue 1, January 2010

Depositional environment in the southern Ulleung Basin, East Sea (Sea of Japan), during the last 48 000 years

Content Provider	Springer Nature Link
Author	Liu, Yanguang Sha, Longbin Shi, Xuefa Suk, Bong Chool Li, Chaoxin Wang, Kunshan Li, Xiaoyan
Copyright Year	2010
Abstract	The present study is based on the sedimentological data from a piston core KCES1 off the southern Ulleung Basin margin, the East Sea (Sea of Japan). The data include sediment color (L*), X-ray radiographs, grain size distribution and AMS$^{14}$C date. Four kinds of sediments (homogeneous, laminated, crudely laminated and hybrid sediments) are identified according to the characters of the sedimentary structures that were considered to reflect changes in bottom-water oxygenation. Alternations of dark laminated/crudely laminated sediments and light homogeneous sediments represent millennial-scale variations that are possibly associated with the high-resolution changes in the East Asian monsoon (EAM). The relative contributions of the East China Sea Coastal Water (ECSCW) and the Tsushima Warm Current (TWC) were likely the main reasons for the repetition of the anoxic and oxic depositional conditions in the East Sea since the last 48 ka BP. During the interstadial, the strengthen summer EAM was attributed to the expansion of the ECSCW because of more humid climate in central Asia, and then more strongly low-salinity, nutrient-enriched water was introduced into the East Sea. The ventilation of deep water was restricted and therefore the dark laminated layer deposited under the anoxic bottom water condition. During the lowest stand of sea level in the last glacial maximum (LGM), the isolated East Sea dominated by stratified water masses and the euxinic depositional environment formed. The homogenous sediments have been predominating since 17.5 ka BP indicating that the TWC has intruded into the East Sea gradually with the stepwise rise of sea level and the bottom water oxygen level was high. During the late Younger Dryas (YD) period, the last dark laminated layer deposited because the ventilation of bottom water was restricted by stronger summer EAM. The TWC strengthened and the bottom water became oxic again from 10.5 ka BP.
Starting Page	52
Ending Page	64
Page Count	13
File Format	PDF
ISSN	0253505X
Journal	Acta Oceanologica Sinica
Volume Number	29
Issue Number	5
e-ISSN	18691099
Language	English
Publisher	The Chinese Society of Oceanography
Publisher Date	2010-12-30
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	East Sea depositional environment East Asian monsoon Tsushima Warm Current Environmental Chemistry Marine & Freshwater Sciences Engineering Fluid Dynamics Ecology Climate Change Oceanography
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Oceanography

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