Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance
	Chen, MH ; Zhang, Q ; Zhang, LL ; Zarikian, CA ; Wang, RJ
刊名	PALAEOWORLD
	2014
卷号	23 期号:1 页码:90-104
关键词	Radiolarian Spongodiscus biconcavus Paleoceanography NHG Bering Sea Integrated Ocean Drilling Program (IODP) Site U1340
ISSN号	1871-174X
通讯作者	mhchen@scsio.ac.cn ; zhang_qiang6142@yahoo.com.cn ; llzhang@scsio.ac.cn ; zarikian@iodp.tamu.edu ; rjwangk@online.sh.cn
中文摘要	The temporal and spatial distributions of the radiolarian species Spongodiscus biconcavus Haeckel are investigated to understand the paleoceanographic evolution of the Bering Sea region during the last 4.3 Myr based on extensive study of samples collected at Site U1340 during the IODP Expedition 323. The biostratigraphic resolution for the region is also improved by multidisciplinary studies of radiolarians, diatoms, dinoflagellates, ebridians, and silicoflagellates. The results demonstrate that the abundance variation of S. biconcavus during the last 4.3 Myr is closely related to global climate changes, and the species can be used as a warm water and climate proxy in the Bering Sea. Based on the downhole profiles of S. biconcavus and other parameters, we conclude that the southern Bering Sea was associated with a warm water mass prior to 3.147 Ma but it gradually cooled thereafter. From 2.793 Ma to 0.889 Ma, a cold water mass and sea-ice predominated in the Bering Sea, in response to the early Northern Hemisphere glaciation (NHG). Furthermore, the climate suddenly became much cooler post 0.889 Ma. Nevertheless, a reversal of this cooling trend occurred after the Mid-Pleistocene Climatic Transition (-1.2 Ma), marked by reoccurrence of warm water and reduced sea-ice in the Bering Sea until the final retreat of warm water mass from the Bering Sea after 0.239 Ma. These processes are correlated with biogeographic expansion and retreat of warm water planktonic species. (C) 2013 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
学科主题	Paleontology
收录类别	SCI
资助信息	NSFC [41076026, 40906030, 41030859]; National Key Project for Basic Research of China [2013CB956102]
原文出处	ELSEVIER SCIENCE BV
WOS记录号	WOS:000332271400007
公开日期	2014-12-11
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10642]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Chen, MH,Zhang, Q,Zhang, LL,et al. Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance[J]. PALAEOWORLD,2014,23(1):90-104.
APA	Chen, MH,Zhang, Q,Zhang, LL,Zarikian, CA,&Wang, RJ.(2014).Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance.PALAEOWORLD,23(1),90-104.
MLA	Chen, MH,et al."Stratigraphic distribution of the radiolarian Spongodiscus biconcavus Haeckel at IODP Site U1340 in the Bering Sea and its paleoceanographic significance".PALAEOWORLD 23.1(2014):90-104.