Paleoceanographic records in the sedimentary cores from the middle Okinawa Trough

doi:10.1360/01we0021

	Paleoceanographic records in the sedimentary cores from the middle Okinawa Trough
	Liu, YG ; Fu, YX ; Du, DW ; Meng, XW ; Liang, RC ; Li, TG ; Wu, SY
刊名	CHINESE SCIENCE BULLETIN
	2003-06
卷号	48 页码:74-81
关键词	Okinawa Trough oxygen isotope Younger Dryas event paleoceanography
ISSN号	1001-6538
DOI	10.1360/01we0021
英文摘要	Two gravity piston cores (Cores 155 and 18) involved in this study were collected from the middle Okinawa Trough. Stratigraphy of the two cores was divided and classified based on the features of planktonic foraminifera oxygen isotope changes together with depositional sequence, millennium-scale climatic event comparison, carbonate cycles and AMS(14)C dating. Some paleoclimatic information contained in sediments of these cores was extracted to discuss the paleoclimatic change rules and the short-time scale events presented in interglacial period. Analysis on the variation of oxygen isotope values in stage two shows that the middle part of the Okinawa Trough may have been affected by fresh water from the Yellow River and the Yangtze River during the Last Glacial Maximum (LGM). The oxygen isotope value oscillating ranges of the cores have verified that the marginal sea has an amplifying effect on climate changes. The delta(13)C of benthic foraminifera Uvigerina was lighter in the glacial period than that in the interglacial period, which indicates that the Paleo-Kuroshio's main stream moved eastward and its influence area decreased. According to the temperature difference during the "YD" period existing in Core 180 and other data, we can reach the conclusion that the climatic changes in the middle Okinawa Trough area were controlled by global climatic changes, but some regional factors had also considerable influence on the climate changes. Some results in this paper support Fairbanks's point that the "YD" event was a brief stagnation of sea level rising during the global warming up procession. Moreover, the falling of sea level in the glacial period weakened the exchange between the bottom water of the Okinawa Trough and the deep water of the northwestern Pacific Ocean and resulted in low oxygen state of bottom water in this area. These procedures are the reasons for carbonate cycle in the Okinawa Trough area being consistent with the "Atlantic type" carbonate cycle.
WOS关键词	NORTHWESTERN PACIFIC-OCEAN ; KUROSHIO CURRENT ; CHINA-SEA ; ICE-CORE ; CIRCULATION
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000183335900011
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26602]
专题	自然资源部第一海洋研究所
通讯作者	Liu, YG
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China 2.Acad Sinica, Inst Oceanol, Qingdao 266071, Peoples R China 3.Qingdao Geol & Mineral Geotech Engn Co Ltd, Qingdao 266071, Peoples R China 4.Ocean Univ China, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Liu, YG,Fu, YX,Du, DW,et al. Paleoceanographic records in the sedimentary cores from the middle Okinawa Trough[J]. CHINESE SCIENCE BULLETIN,2003,48:74-81.
APA	Liu, YG.,Fu, YX.,Du, DW.,Meng, XW.,Liang, RC.,...&Wu, SY.(2003).Paleoceanographic records in the sedimentary cores from the middle Okinawa Trough.CHINESE SCIENCE BULLETIN,48,74-81.
MLA	Liu, YG,et al."Paleoceanographic records in the sedimentary cores from the middle Okinawa Trough".CHINESE SCIENCE BULLETIN 48(2003):74-81.