气候变化领域集成服务门户(CCPortal): Variable Kuroshio Current intrusion into the northern South China Sea over the last 7.3 kyr

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DOI	10.1016/j.palaeo.2020.110093
	Variable Kuroshio Current intrusion into the northern South China Sea over the last 7.3 kyr
	Du S.; Xiang R.; Liu J.; Yan H.; Sha L.; Liu J.P.; Chen Z.; Ariful Islam G.M.; Dileep Bandara Herath H.M.
发表日期	2020
ISSN	0031-0182
英文摘要	The branch intrusion of the Kuroshio Current (KC) into the northern South China Sea (SCS) has a significant effect on temperature, salinity, circulation, and eddy generation. However, the study of Holocene hydrological changes and the historical influence of the KC in this region is limited. Here, we report high-resolution sea surface temperature (SST) and δ18Osw (as a proxy for sea surface salinity, SSS) records based on paired Mg/Ca ratios and δ18O analyses of the planktonic foraminifera Globigerinoides ruber combined the Pulleniatina obliquiloculata and G. sacculifer/G. ruber ratios from core 05E306 (22°0.06′ N, 118°59.64′ E; water depth = 1440 m) in the northern SCS. By comparing these data with records from cores located within and outside of the main KC flow pathway, we evaluate the spatiotemporal evolution of the KC in this region over the last 7.3 kyr. The strongest influence was observed from 6.1 to 5.3 ka, recorded as an abrupt increase in SST and SSS with remarkably increased P. obliquiloculata abundance (37.4%) and G. sacculifer/G. ruber ratios (3.18). During the following period, 5–2.5 ka, SST decreased by 0.4–1.1 °C with an associated decrease in δ18Osw, indicating a weakened KC. After 2.5 ka, the influence of the KC on the northern SCS strengthened; however, the high SST record still exhibits a spatial constraint in the longitude distribution of the KC during this period of strongest intrusion. Moreover, the abundance of planktonic foraminifera in the study area more strongly correlates with SSS than SST. The δ18Osw records in core 05E306 show a freshening trend after 5.7 ka, which is inconsistent with the declining East Asian Summer Monsoon precipitation record but consistent with the Holocene freshening trend recorded in the Western Pacific. This suggests that hydrological variability of the northern SCS is mainly influenced by the Western Pacific Ocean. © 2020
英文关键词	G. ruber; G. sacculifer; P. obliquiloculata; Sea surface temperature; Seawater δ18O; Western Pacific
语种	英语
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150708
作者单位	CAS Key Laboratory of Ocean and Marginal Sea Geology, Innovation Academy of South China Sea Ecology and Environmental Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China; Key Laboratory of Geographic Information Science and State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China; Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States; University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Du S.,Xiang R.,Liu J.,et al. Variable Kuroshio Current intrusion into the northern South China Sea over the last 7.3 kyr[J],2020.
APA	Du S..,Xiang R..,Liu J..,Yan H..,Sha L..,...&Dileep Bandara Herath H.M..(2020).Variable Kuroshio Current intrusion into the northern South China Sea over the last 7.3 kyr.Palaeogeography, Palaeoclimatology, Palaeoecology.
MLA	Du S.,et al."Variable Kuroshio Current intrusion into the northern South China Sea over the last 7.3 kyr".Palaeogeography, Palaeoclimatology, Palaeoecology (2020).