Evolution and variability of the East Asian summer monsoon during the Pliocene: Evidence from clay mineral records of the South China Sea

doi:10.1016/j.palaeo.2010.05.025

	Evolution and variability of the East Asian summer monsoon during the Pliocene: Evidence from clay mineral records of the South China Sea
	Wan, Shiming 1,2; Tian, Jun 3; Steinke, Stephan 4; Li, Anchun 1; Li, Tiegang 1
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2010-07-01
卷号	293 期号:1-2 页码:237-247
关键词	East Asian Monsoon Clay Minerals Pliocene South China Sea Odp Leg 184
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2010.05.025
文献子类	Article
英文摘要	The Late Pliocene is thought to be characterized by the simultaneous intensification of both the East Asian winter monsoon (EAWM) and East Asian summer monsoon (EASM). However, the evolution of the EASM during the Pliocene remains still controversial and only little is known about the dynamics of the EASM during the Pliocene on orbital time scales. Here we use clay mineral assemblages in sediments from Ocean Drilling Program (ODP) Site 1143 in the southern South China Sea (SCS) to obtain proxy records of past changes in the EASM climate during the Pliocene. Provenance analysis suggests that illite, chlorite and kaolinite originated mainly from the Mekong River drainage area. Smectite was derived mainly from the Indonesian islands. The kaolinite/illite ratio and the chemical index of alteration (CIA) of siliciclastic sediments allowed us to reconstruct the history of chemical weathering and physical erosion of the Mekong River drainage area and thus, the evolution of,the EASM during the Pliocene. Our clay minerals proxy data suggests a stronger EASM during the Early Pliocene than during the Late Pliocene. We propose that the long-term evolution of the EASM has been driven by global cooling rather than the uplift of the Tibetan Plateau. Spectral analysis of kaolinite/ illite ratio displays a set of strong periodicities at 100 ka, 30 ka, 28 ka, 25 ka, and 22 ka. with no clear obliquityrelated signal. Our study suggests that the Pliocene EASM intensity on orbital time scales is not only controlled by the Northern Hemisphere summer insolation, but also strongly influenced by equatorial Pacific ENSO-like ocean atmosphere dynamics. (C) 2010 Elsevier B.V. All rights reserved.
WOS关键词	NORTHERN-HEMISPHERE GLACIATION ; OCEANIC PRIMARY PRODUCTION ; LOESS PLATEAU ; LATE PLEISTOCENE ; TIBETAN PLATEAU ; GEOCHEMICAL INVESTIGATIONS ; EROSIONAL HISTORY ; ICE VOLUME ; MA ; SEDIMENT
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000280007000020
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72906]
专题	中国科学院地质与地球物理研究所
通讯作者	Wan, Shiming
作者单位	1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 4.Univ Bremen, MARUM Zentrum Marine Umweltwissensch, Ctr Marine Environm Sci, Bremen, Germany
推荐引用方式 GB/T 7714	Wan, Shiming,Tian, Jun,Steinke, Stephan,et al. Evolution and variability of the East Asian summer monsoon during the Pliocene: Evidence from clay mineral records of the South China Sea[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2010,293(1-2):237-247.
APA	Wan, Shiming,Tian, Jun,Steinke, Stephan,Li, Anchun,&Li, Tiegang.(2010).Evolution and variability of the East Asian summer monsoon during the Pliocene: Evidence from clay mineral records of the South China Sea.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,293(1-2),237-247.
MLA	Wan, Shiming,et al."Evolution and variability of the East Asian summer monsoon during the Pliocene: Evidence from clay mineral records of the South China Sea".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 293.1-2(2010):237-247.