MEASUREMENT AND PALEOCLIMATIC SIGNIFICANCE OF SOIL BULK DENSITY FOR LOESS IN EXTREME ARID REGION

ZAN Jinbo; YANG Shengli; FANG Xiaomin; LI Xiangyu; YANG Yibo; CHI Yunping

doi:10.3724/SP.J.1140.2010.02127

Marine Geology & Quaternary Geology > 2010 > 30(2): 127-132. > DOI: 10.3724/SP.J.1140.2010.02127

ZAN Jinbo, YANG Shengli, FANG Xiaomin, LI Xiangyu, YANG Yibo, CHI Yunping. MEASUREMENT AND PALEOCLIMATIC SIGNIFICANCE OF SOIL BULK DENSITY FOR LOESS IN EXTREME ARID REGION[J]. Marine Geology & Quaternary Geology, 2010, 30(2): 127-132. DOI: 10.3724/SP.J.1140.2010.02127

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MEASUREMENT AND PALEOCLIMATIC SIGNIFICANCE OF SOIL BULK DENSITY FOR LOESS IN EXTREME ARID REGION

1 Ministry of Education Key Laboratory of Western China's Environmental Systems & College of Resources and Environment, Lanzhou University, Lanzhou 730000, China;
2 Center for Basin Resource and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;
3 College of Geography Science, Nanjing Normal University, Nanjing 210046, China

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Received Date: August 10, 2009
Revised Date: October 29, 2009

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Abstract

Abstract

Soil bulk density of the loess-paleosol can not only reflect variations in strength of East Asian winter and summer monsoon, but also has important significance to study paleoclimate and reconstruct drying trend of Asian heartland. Now, most of researches on the soil bulk density concentrate their attention on Chinese Loess Plateau(CLP), while in the arid regions of Northwest China there are relatively fewer researches on the methods and paleoclimatic significance of the soil bulk density. Based on previous studies, an ideal method for measurement of the soil bulk density in arid region of Asian heartland is put forward in this paper, and we also find the soil bulk density value in negative correlation with variations in the grain sizes and magnetic susceptibility (MS), which is very different from that in Chinese Loess Plateau. Further analysis suggested that variations in the soil bulk density of extreme arid region loess was mainly controlled by the drought extent of source region, rather than monsoon intensity.
- soil bulk density,
- extreme arid region,
- Kunlun Mountains Loess

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References

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MEASUREMENT AND PALEOCLIMATIC SIGNIFICANCE OF SOIL BULK DENSITY FOR LOESS IN EXTREME ARID REGION