Magnetic susceptibility evidence of monsoon variation on the Loess Plateau of central China during the last 130,000 years

Quaternary Research - Tập 36 - Trang 29-36 - 1991
Zhisheng An1
1Xian Laboratory of Loess and Quarternary Geology, Academia Sinica, P.O. Box 17, Xian 710061, China

Tóm tắt

AbstractThe magnetic susceptibility of loess and paleosols in central China represents a proxy climate index closely related to past changes of precipitation and vegetation, and thus to summer monsoon intensity. Time series of magnetic susceptibility constructed for three loess-paleosol sequences in the southern part of the Chinese Loess Plateau document the history of summer monsoon variation during the last 130,000 yr. They correlate closely with the oxygen isotope record of stages 1 to 5 in deep-sea sediments. Soils were forming during intervals of strong summer monsoon, whereas loess units were deposited at times of reduced monsoon intensity. The Chinese loess-paleosol sequence can thus be viewed as a proxy record of Asian monsoon variability extending over the last 2.5 myr.

Tài liệu tham khảo

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