东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

Major Mid-Late Holocene Cooling in the East China Sea Revealed by an Alkenone Sea Surface Temperature Record

ISSN号：1672-5182
期刊名称：《中国海洋大学学报：英文版》
时间：0
分类：P512.3[天文地球—地质学] S937[农业科学—渔业资源;农业科学—水产科学]
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]Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, StateOceanic Administration, Qingdao 266061, P. R. China, [4]College of Marine Geoscience, Ocean University of China, Qingdao 266100, P. R. China
相关基金：We thank Dr. Y. Saito and Dr. J. Liu for providing the AMS 14C dates. This research was supported by the National Basic Research Program of China （973 Program 2010CB428901） and by the Natural Science Foundation of China （Grant Nos. 41221004 and 41020164005）. This is MCTL Contribution #70.

作者： ZHAO Meixun[1,2], DING Ling[1,2], XING Lei[1,2], QIAO Shuqing[3,4], YANG Zuosheng[4]

关键词：中晚全新世, 东中国海, 温度记录, 烯酮, 降温, 全新世中期, 夏季风强度, 海表, sea surface temperature alkenone East China Sea 4 ka ITCZ

中文摘要：

Although the mid-late Holocene cold and dry event about 4000 years ago(the 4 ka event) has been observed almost globally, it was most prominent in terrestrial climate proxies from the lower latitudes. Here we evaluate the oceanic response to this event in terms of a Holocene sea surface temperature(SST) record reconstructed using the K’37U index for Core B3 on the continental shelf of the East China Sea. The record reveals a large temperature drop of about 5℃ from the mid-Holocene(24.7℃ at 5.6 ka) to the 4 ka event(19.2℃ at 3.8 ka). This mid-late Holocene cooling period in Core B3 correlated with(i) decreases in the East Asia summer monsoon intensity and(ii) the transition period with increased El Nino/Southern Oscillation activities in the Equatorial Pacific. Our SST record provides oceanic evidence for a more global nature of the mid-late Holocene climate change, which was most likely caused by a southward migration of the Intertropical Converge Zone in response to the decreasing summer solar insolation in the Northern Hemisphere. However, the large SST drop around Core B3 indicates that the mid-late Holocene cooling was regionally amplified by the initiation/strengthening of eddy circulation/cold front which caused upwelling and resulted in additional SST decrease. Upwelling during the mid-late Holocene also enhanced with surface productivity in the East China Sea as reflected by higher alkenone content around Core B3.

英文摘要：

Although the mid-late Holocene cold and dry event about 4000years ago （the 4ka event） has been observed almost globally, it was most prominent in terrestrial climate proxies from the lower latitudes. Here we evaluate the oceanic response to this event in terms of a Holocene sea surface temperature （SST） record reconstructed using the U~7 index for Core B3 on the continen- tal shelf of the East China Sea. The record reveals a large temperature drop of about 5~C from the mid-Holocene （24.7~C at 5.6ka） to the 4ka event （19.2~C at 3.8ka）. This mid-late Holocene cooling period in Core B3 correlated with （i） decreases in the East Asia summer monsoon intensity and （ii） the transition period with increased E1 Nifio/Southern Oscillation activities in the Equatorial Pa- cific. Our SST record provides oceanic evidence for a more global nature of the mid-late Holocene climate change, which was most likely caused by a southward migration of the Intertropical Converge Zone in response to the decreasing summer solar insolation in the Northern Hemisphere. However, the large SST drop around Core B3 indicates that the mid-late Holocene cooling was regionally amplified by the initiation/strengthening of eddy circulation/cold front which caused upwelling and resulted in additional SST de- crease. Upwelling during the mid-late Holocene also enhanced with surface productivity in the East China Sea as reflected by higher alkenone content around Core B3.