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Variations in the radiolarian assemblages in the Bering Sea since Pliocene and their implications for paleoceanography
Zhang, Q; Chen, MH; Zhang, LL; Hu, WF; Xiang, R; zhangqiang210@scsio.ac.cn; mhchen@scsio.ac.cn; llzhang@scsio.ac.cn; su_dada@foxmail.com; rxiang@scsio.ac.cn
2014
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume410Pages:337-350
AbstractRadiolarian assemblages were analyzed using samples from the IODP Site U1340 to reconstruct the paleoceanographic conditions in the Bering Sea Based on the characteristic faunal changes, the radiolarian evolution at Site U1340 was divided into four major intervals from Stages I to IV, with Stage IV divided into Substages IVa and IVb. The radiolarians in each stage recorded significant paleoenvironmental conditions. In general, the Bering Sea was governed by an ocean ecological environment with stable warm and saline surface water during Stage I (4.15 Myr to 3.91 Myr). The environment in the Bering Sea fluctuated strongly during Stage 11 (3.91 Myr to 2.75 Myr) and was controlled by the cold-water masses and sea ices during Stage III (2.75 Myr to 1.07 Myr) with the gradual development of cold and well-ventilated intermediate water. Stage IVa (1.07 Myr to 0.47 Myr) was a transitional period characterized by the enhanced formation of cold subsurface and intermediate water as well as of the oxygen-rich deep water. During Stage IVb (after 0.47 Myr), the Bering Sea was mainly characterized by enhanced warmth during interglacial episodes and well-developed water layers that were generally comparable to those of the modern Bering Sea. These conditions indicated that the vertical water-mass structure of the modern Bering Sea began to form since 0.47 Ma. Every Stage boundary in the studied core was marked by notable changes in the radiolarian assemblages. These changes corresponded to the climatic cooling event at similar to 3.91 Ma, the intensification of Northern Hemisphere glaciation at similar to 2.75 Ma, the beginning of the middle Pleistocene transition at similar to 1.07 Ma, and the low-latitude radiolarian ecology event at similar to 0.47 Ma. In addition, the relative abundance pattern of Cycladophora davisiana indicates that the Bering Sea was the main source of the past North Pacific Intermediate Water at ca. 0.85 Ma (MIS22), ca. 0.63 Ma (MIS16), and ca. 0.18 Ma (MIS6), just as it was during the last glacial maximum. (C) 2014 Elsevier B.V. All rights reserved.
Department[Zhang, Qiang ; Chen, Muhong ; Zhang, Lanlan ; Hu, Weifen ; Xiang, Rong] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China ; [Zhang, Qiang ; Hu, Weifen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
KeywordThe Bering Sea Site U1340 Pliocene Radiolarian Assemblages Paleoenvironmental Conditions
Subject AreaPhysical Geography ; Geology ; Paleontology
Funding OrganizationNational Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China
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Indexed Bysci
Funding Project海洋地质
Funding OrganizationNational Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China ; National Natural Science Foundation of China [41076026, 41276051, 91228207]; National Key Basic Research Program of China [2013CB956102]; IODP-China
WOS IDWOS:000340687700026
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/10604
Collection中科院边缘海地质重点实验室
Corresponding Authorzhangqiang210@scsio.ac.cn; mhchen@scsio.ac.cn; llzhang@scsio.ac.cn; su_dada@foxmail.com; rxiang@scsio.ac.cn
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GB/T 7714
Zhang, Q,Chen, MH,Zhang, LL,et al. Variations in the radiolarian assemblages in the Bering Sea since Pliocene and their implications for paleoceanography[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2014,410:337-350.
APA Zhang, Q.,Chen, MH.,Zhang, LL.,Hu, WF.,Xiang, R.,...&rxiang@scsio.ac.cn.(2014).Variations in the radiolarian assemblages in the Bering Sea since Pliocene and their implications for paleoceanography.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,410,337-350.
MLA Zhang, Q,et al."Variations in the radiolarian assemblages in the Bering Sea since Pliocene and their implications for paleoceanography".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 410(2014):337-350.
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