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Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record
Xiang, R; Sun, YB; Li, TG; Oppo, DW; Chen, MH; Zheng, F; rxiang@scsio.ac.cn
2007
发表期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
卷号243期号:40606页码:378-393
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.
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
关键词Okinawa Trough Last Deglaciation Holocene East Asia Monsoon Planktonic Forarninifera Sedimentation Rate Kuroshio Current Millennial-scale Climate Changes Oxygen Isotope
学科领域Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000244083200009
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4514
专题中科院边缘海地质重点实验室
通讯作者rxiang@scsio.ac.cn
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Xiang, R,Sun, YB,Li, TG,et al. Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2007,243(40606):378-393.
APA Xiang, R.,Sun, YB.,Li, TG.,Oppo, DW.,Chen, MH.,...&rxiang@scsio.ac.cn.(2007).Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,243(40606),378-393.
MLA Xiang, R,et al."Paleoenvironmental change in the middle Okinawa Trough since the last deglaciation: Evidence from the sedimentation rate and planktonic foraminiferal record".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 243.40606(2007):378-393.
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