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Holocene Temperature Records from the East China Sea Mud Area Southwest of the Cheju Island Reconstructed by the U^K_37 and TEX86 Paleothermometers

ISSN号：1672-5182
期刊名称：《中国海洋大学学报：英文版》
时间：0
分类：P53[天文地球—古生物学与地层学;天文地球—地质学] S151.23[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China,Qingdao 266100, P. R. China, [2]Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, P. R. China, [3]MoE Laboratory for Earth Surface Processes, Department of Geography, and Centre for Ocean Research, PekingUniversity, Beijing 100871, P. R. China
相关基金：supported by the National Basic Research Program of China(973 Program 2010CB428901);the National Natural Science Foundation of China(Grant Nos.41221004,41276068);the ‘111’ Project

作者： XING Lei[1,2], JIANG Yiqing[1,2], YUAN Zineng[1,2], ZHANG Hailong[1,2], LI Li[1,2], ZHOU Liping[3], ZHAO Meixun[1,2]

关键词：全新世晚期, 东海泥质区, 温度记录, 东中国海, 济州岛, 西南, 全球气候变化, 环境演变, U^K_37, TEX86, East China Sea, Holocene, sea surface temperature, eddy, Kuroshio

中文摘要：

As an important marginal sea under the influences of both the Changjiang River and the Kuroshio,the East China Sea (ECS) environment is sensitive to both continental and oceanic forcing.Paleoenvironmental records are essential for understanding the long-term environmental evolution of the ECS and adjacent areas.However,paleo-temperature records from the ECS shelf are currently very limited.In this study,the’K37U and TEX86paleothermometers were used to reconstruct surface and subsurface temperature changes of the mud area southwest of the Cheju Island (Site F10B) in the ECS during the Holocene.The results indicate that temperature changes of F10B during the early Holocene (11.6 6.2 kyr) are associated with global climate change.During the period of 6.2 2.5 kyr,the similar variability trends of smoothing average of T (the difference between surface and subsurface temperature) of Site F10B and the strength of the Kuroshio suggest that the Kuroshio influence on the site started around 6.2 kyr when the Kuroshio entered the Yellow Sea and continued to 2.5 kyr.During the late Holocene (2.5 1.45 kyr) ,apparent decreases of’K37U sea surface temperature (SST) and T imply that the direct influence of the Kuroshio was reduced while cold eddy induced by the Kuroshio gradually controlled hydrological conditions of this region around 2.5 kyr.

英文摘要：

As an important marginal sea under the influences of both the Changjiang River and the Kuroshio, the East China Sea （ECS） environment is sensitive to both continental and oceanic forcing. Paleoenvironmental records are essential for understanding the long-term environmental evolution of the ECS and adjacent areas. However, paleo-temperature records from the ECS shelf are currently very limited. In this study, the U^K_37 and TEX86 paleothermometers were used to reconstruct surface and subsurface temperature changes of the mud area southwest of the Cheju Island （Site F10B） in the ECS during the Holocene. The results indicate that temperature changes of F 10B during the early Holocene （11.6-6.2 kyr） are associated with global climate change. During the period of 6.2-2.5 kyr, the similar variability trends of smoothing average of AT （the difference between surface and subsurface temperature） of Site F10B and the strength of the Kuroshio suggest that the Kuroshio influence on the site started around 6.2kyr when the Kuroshio entered the Yellow Sea and continued to 2.5 kyr. During the late Holocene （2.5-1.45 kyr）, apparent decreases of U^K_37 sea surface temperature （SST） and AT imply that the direct influence of the Kuroshio was reduced while cold eddy induced by the Kuroshio gradually controlled hydrological conditions of this region around 2.5 kyr.