Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: Implications for monsoon evolution

doi:10.1029/2005JB003765

	Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: Implications for monsoon evolution
	Hao, QZ; Guo, ZT
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
	2005-12-02
卷号	110 期号:B12
ISSN号	2169-9313
DOI	10.1029/2005JB003765
文献子类	Article
英文摘要	[1] We examine spatial variations in magnetic susceptibility ( MS) over the Loess Plateau in China based on 50 sections in order to identify spatial changes in monsoon climate at key glacial, interglacial, and interstadial intervals for the last 600 kyr. The results indicate strong coherence between MS variations during the interglacial periods and present-day precipitation and temperature patterns. This suggests that the strength of the summer monsoon had a dominant influence on the MS signals in soils, through modulating pedogenic intensity. The distribution of MS during glacial periods is characterized by weak S-N gradients and rough W-E zonal patterns, indicating a negligible effect of the summer monsoon. Interstadial patterns are intermediate between the glacial and interglacial ones. Interglacial patterns for the last 600 kyr are essentially similar, suggesting that the climate regime during these periods has not undergone significant changes and that the east Asian summer monsoon has remained the main moisture carrier. Our estimates of the relative amplitudes of climate oscillations during these time slices are consistent with earlier paleoclimate studies. These data, associated with the available susceptibility-based climofunctions, may be used to estimate spatial changes of paleorainfall and paleotemperature for these key periods and hence to test climate models.
WOS关键词	RED CLAY ; SOIL SEQUENCES ; GRAIN-SIZE ; US DESERT ; PLATEAU ; CLIMATE ; RECORD ; KA ; CYCLES ; MAGNETOSTRATIGRAPHY
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000233963600001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/65526]
专题	中国科学院地质与地球物理研究所
通讯作者	Guo, ZT
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Hao, QZ,Guo, ZT. Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: Implications for monsoon evolution[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2005,110(B12).
APA	Hao, QZ,&Guo, ZT.(2005).Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: Implications for monsoon evolution.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,110(B12).
MLA	Hao, QZ,et al."Spatial variations of magnetic susceptibility of Chinese loess for the last 600 kyr: Implications for monsoon evolution".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 110.B12(2005).