Strong negative correlation between dust event frequency and air temperature over the northern Tibetan Plateau reflected by the Malan ice-core record

Authors: Wang, Ninglian; Yao, Tandong; Thompson, L.G.; Davis, M.E.

Source: Annals of Glaciology, Volume 43, Number 1, September 2006 , pp. 29-33(5)

Publisher: International Glaciological Society

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Abstract:

In this paper, the ratio of dust layer thickness to ice thickness, i.e. the dust ratio, is used as a proxy for dust event frequency in the Malan ice core from the northern Tibetan Plateau. We reconstructed a ∼900 year record that reveals that the 1770s-1880s was a prolonged period of high dust ratios, which indicates that dust events occurred frequently from the late 18th century through the 19th century. Statistical analysis of the variations in the dust ratios and δ¹⁸O (which is a good proxy for air temperature) in the Malan ice core shows that there is a strong negative correlation between them. This suggests that dust events occur more frequently in cold periods than in warm periods.

Document Type: Research article

DOI: 10.3189/172756406781812339

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