Patterns and frequencies of the East Asian winter monsoon variations during the past million years revealed by wavelet and spectral analyses

doi:10.1016/S0921-8181(02)00136-4

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（1985-2004）

	Patterns and frequencies of the East Asian winter monsoon variations during the past million years revealed by wavelet and spectral analyses
	Lu, HY; Zhang, FQ; Liu, XD
	2003-01
发表期刊	GLOBAL AND PLANETARY CHANGE
卷号	35 期号:1-2 页码:67-74
文章类型	Article
摘要	The wavelet and spectral analyses are used to investigate the variations of patterns and frequencies of the East Asian winter monsoon system during the past million years. Grain size of the loess-paleosol deposit at the central Chinese Loess Plateau is employed as a proxy indicator of the winter monsoon strength. On the bases of palaeomagnetic dates and a sedimentation rate model, an absolute, not orbitally tuned time scale for the loess deposit is developed. Wavelet analyses on this time series show that the patterns and frequencies of the East Asian winter monsoon climate vary with time during the past million years. The wavelet analyses also revealed a shift of climatic pattern from predominantly quasi-200- to quasi-100-ka cycle at around 500 ka BP which is also supported by previous studies using the sedimentation rate analysis as well as paleosol observations. Traditional spectral analysis on the same time series shows that the East Asian winter monsoon changes at Milankovich cycles, but there are also cycles which may not be related to orbital forcing. The predominant 41-ka cycle identified from previous studies is not evident in this time series from both wavelet and spectral analyses. Our results present new evidence that not only solar radiation, but also other boundary conditions, may have forced the monsoon system changes at the 104 105 years time scale. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词	east Asian palaeomonsoon Pleistocene epoch wavelet analysis Chinese loess
学科领域	Physical Geography ; Geology
DOI	10.1016/S0921-8181(02)00136-4
关键词[WOS]	CHINESE LOESS PLATEAU ; TIME-SCALE ; MAGNETIC-SUSCEPTIBILITY ; CLIMATE ; DUST ; DEPOSITS ; LUOCHUAN ; SERIES ; RECORD ; OCEAN
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000179712400005
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/11996
专题	黄土与第四纪地质国家重点实验室（1985-2004）
推荐引用方式 GB/T 7714	Lu, HY,Zhang, FQ,Liu, XD. Patterns and frequencies of the East Asian winter monsoon variations during the past million years revealed by wavelet and spectral analyses[J]. GLOBAL AND PLANETARY CHANGE,2003,35(1-2):67-74.
APA	Lu, HY,Zhang, FQ,&Liu, XD.(2003).Patterns and frequencies of the East Asian winter monsoon variations during the past million years revealed by wavelet and spectral analyses.GLOBAL AND PLANETARY CHANGE,35(1-2),67-74.
MLA	Lu, HY,et al."Patterns and frequencies of the East Asian winter monsoon variations during the past million years revealed by wavelet and spectral analyses".GLOBAL AND PLANETARY CHANGE 35.1-2(2003):67-74.