An updated astronomical timescale for the Plio-Pleistocene deposits from South China Sea and new insights into Asian monsoon evolution

doi:10.1016/j.quascirev.2011.04.009

	An updated astronomical timescale for the Plio-Pleistocene deposits from South China Sea and new insights into Asian monsoon evolution
	Ao, Hong 1,2; Dekkers, Mark J.3; Qin, Li 4; Xiao, Guoqiao 5
刊名	QUATERNARY SCIENCE REVIEWS
	2011-06-01
卷号	30 期号:13-14 页码:1560-1575
关键词	Astronomical chronology South China Sea ODP Site 1143 Asian monsoon Pliocene Pleistocene
ISSN号	0277-3791
DOI	10.1016/j.quascirev.2011.04.009
文献子类	Article
英文摘要	Here we present an improved astronomical timescale since 5 Ma as recorded in the ODP Site 1143 in the southern South China Sea, using a recently published Asian summer monsoon record (hematite to goethite content ratio, Hm/Gt) and a parallel benthic delta O-18 record. Correlation of the benthic delta O-18 record to the stack of 57 globally distributed benthic delta O-18 records (LR04 stack) and the Hm/Gt curve to the 65 degrees N summer insolation curve is a particularly useful approach to obtain refined timescales. Hence, it constitutes the basis for our effort. Our proposed modifications result in a more accurate and robust chronology than the existing astronomical timescale for the ODP Site 1143. This updated timescale further enables a detailed study of the orbital variability of low-latitude Asian summer monsoon throughout the Plio-Pleistocene. Comparison of the Hm/Gt record with the delta O-18 record from the same core reveals that the oscillations of low-latitude Asian summer monsoon over orbital scales differed considerably from the glacial interglacial climate cycles. The popular view that summer monsoon intensifies during interglacial stages and weakens during glacial stages appears to be too simplistic for low-latitude Asia. In low-latitude Asia, some strong summer monsoon intervals appear to have also occurred during glacial stages in addition to their increased occurrence during interglacial stages. Vice versa, some notably weak summer monsoon intervals have also occurred during interglacial stages next to their anticipated occurrence during glacial stages. The well-known mid-Pleistocene transition (MPT) is only identified in the benthic delta O-18 record but not in the Hm/Gt record from the same core. This suggests that the MET may be a feature of high- and middle-latitude climates, possibly determined by high-latitude ice sheet dynamics. For low-latitude monsoonal climate, its orbital-scale variations respond more directly to insolation and are little influenced by high-latitude processes, thus the MET is likely not recorded. In addition, the Hin/Gt record suggests that low-latitude Asian summer monsoon intensity has a long-term decreasing trend since 2.8 Ma with increased oscillation amplitude. This long-term variability is presumably linked to the Northern Hemisphere glaciation since then. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词	POLARITY TIME-SCALE ; NORTHERN-HEMISPHERE GLACIATION ; MIDPLEISTOCENE CLIMATE TRANSITION ; ICE-VOLUME ; LOESS PLATEAU ; DELTA-O-18 RECORD ; CONTINENTAL SEQUENCES ; MAGNETIC-PROPERTIES ; FORCING MECHANISMS ; TROPICAL PACIFIC
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000292946800002
资助机构	National Basic Research Program of China(2010CB833400) ; National Basic Research Program of China(2010CB833400) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; National Natural Science Foundation of China(40921120406) ; National Natural Science Foundation of China(40921120406) ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Basic Research Program of China(2010CB833400) ; National Basic Research Program of China(2010CB833400) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; National Natural Science Foundation of China(40921120406) ; National Natural Science Foundation of China(40921120406) ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Basic Research Program of China(2010CB833400) ; National Basic Research Program of China(2010CB833400) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; National Natural Science Foundation of China(40921120406) ; National Natural Science Foundation of China(40921120406) ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences ; National Basic Research Program of China(2010CB833400) ; National Basic Research Program of China(2010CB833400) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; Chinese Academy of Sciences(KZCX2-YW-Q09-04) ; National Natural Science Foundation of China(40921120406) ; National Natural Science Foundation of China(40921120406) ; West Light Foundation of Chinese Academy of Sciences ; West Light Foundation of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74264]
专题	中国科学院地质与地球物理研究所
通讯作者	Ao, Hong
作者单位	1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710075, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Paleomagnetism & Geochronol Lab SKL LE, Beijing 100029, Peoples R China 3.Univ Utrecht, Paleomagnet Lab Ft Hoofddijk, Dept Earth Sci, Fac Geosci, NL-3584 CD Utrecht, Netherlands 4.Chongqing China Three Gorges Museum, Chongqing 400015, Peoples R China 5.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Ao, Hong,Dekkers, Mark J.,Qin, Li,et al. An updated astronomical timescale for the Plio-Pleistocene deposits from South China Sea and new insights into Asian monsoon evolution[J]. QUATERNARY SCIENCE REVIEWS,2011,30(13-14):1560-1575.
APA	Ao, Hong,Dekkers, Mark J.,Qin, Li,&Xiao, Guoqiao.(2011).An updated astronomical timescale for the Plio-Pleistocene deposits from South China Sea and new insights into Asian monsoon evolution.QUATERNARY SCIENCE REVIEWS,30(13-14),1560-1575.
MLA	Ao, Hong,et al."An updated astronomical timescale for the Plio-Pleistocene deposits from South China Sea and new insights into Asian monsoon evolution".QUATERNARY SCIENCE REVIEWS 30.13-14(2011):1560-1575.