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学科主题: Geography, Physical; Geosciences, Multidisciplinary; Paleontology
题名: Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record
作者: Xiang, R ; Sun, YB ; Li, TG ; Oppo, DW ; Chen, MH ; Zheng, F
通讯作者: rxiang@scsio.ac.cn
关键词: Okinawa Trough ; last deglaciation ; Holocene ; East Asia Monsoon ; planktonic forarninifera ; sedimentation rate ; Kuroshio Current ; millennial-scale climate changes ; oxygen isotope
刊名: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
发表日期: 2007
卷: 243, 期:40606, 页:378-393
收录类别: sci
部门归属: Chinese Acad Sci, S China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Gangzhou 510301, Peoples R China; Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan; Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China; Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
项目归属: 海洋地质
摘要: Well-dated, high-resolution records of planktonic foraminifera and oxygen isotopes from two sediment cores, A7 and E017, in the middle Okinawa Trough reveal strong and rapid millennial-scale climate changes since similar to 18 to 17 thousand years before present (kyr B.P.). Sedimentation rate shows a sudden drop at similar to 11.2 cal. kyr B.P. due to a rapid rise of sea level after the Younger Dryas (YD) and consequently submergence of the large continental shelf on the East China Sea (ECS) and the retreat of the estuary providing sediment to the basin. During the last deglaciation, the relative abundance of warm and cold species of planktonic foraminifera fluctuates strongly, consistent with the timing of sea surface temperature (SST) variations determined from Mg/Ca measurements of planktonic foraminifera from one of the two cores. These fluctuations are coeval with climate variation recorded in the Greenland ice cores and North Atlantic sediments, namely Heinrich event 1 (H1), Bolling-Allerod (B/A) and YD events. At about 9.4 kyr B.P., a sudden change in the relative abundance of shallow to deep planktonic species probably indicates a sudden strengthening of the Kuroshio Current in the Okinawa Trough, which was synchronous with a rapid sea-level rise at 9.5-9.2 kyr B.P. in the ECS, Yellow Sea (YS) and South China Sea (SCS). The abundance of planktonic foraminiferal species, together with Mg/Ca based SST, exhibits millennial-scale oscillations during the Holocene, with 7 cold events (at about 1.7, 2.3-4.6, 6.2, 7.3, 8.2, 9.6, 10.6 cal. kyr BP) superimposed on a Holocene warming trend. This Holocene trend, together with centennial-scale SST variations superimposed on the last deglacial trend, suggests that both high and low latitude influences affected the climatology of the Okinawa Trough. (c) 2006 Elsevier B.V. All rights reserved.
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WOS记录号: WOS:000244083200009
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/4514
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Xiang, R; Sun, YB; Li, TG; Oppo, DW; Chen, MH; Zheng, F.Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record,PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2007,243(40606):378-393
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文件名: Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation Evidence from the sedimentation rate and planktonic foraminiferal record .pdf
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