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A 108.83-m ice-core record of atmospheric dust deposition at Mt. Qomolangma (Everest), Central Himalaya

Abstract : The central Himalaya can be regarded as an ideal site for developing a long-term ice core dust record to reflect the environmental signals from regional to semi-hemispheric scales. Here we present a dust record from segments of a 108.83-m ice core recovered from the East Rongbuk (ER) Glacier (27°59′N, 86°55′E; 6518 m a.s.l.) on the northeast slope of Mt. Qomolangma (Everest) in the central Himalaya, covering the period AD 600-1960. Due to rapidly layer thinning and coarse sampling, we primarily discuss the changes in the dust record since AD 1500 in this paper. Results show a significant positive relationship between the dust concentration and reconstructed air temperatures during this period, suggesting a likely cold-humid and warm-dry climatic pattern in the dust source regions, namely Central Asia. This is associated with the variability in the strength of the westerlies and its corresponding precipitation.
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https://hal-insu.archives-ouvertes.fr/insu-00562461
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Submitted on : Thursday, February 3, 2011 - 1:14:10 PM
Last modification on : Friday, September 25, 2020 - 9:16:03 AM

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Jianzhong Xu, Shugui Hou, Dahe Qin, Susan Kaspari, Paul Andrew Mayewski, et al.. A 108.83-m ice-core record of atmospheric dust deposition at Mt. Qomolangma (Everest), Central Himalaya. Quaternary Research, Elsevier, 2010, 73 (1), pp.33-38. ⟨10.1016/J.YQRES.2009.09.005⟩. ⟨insu-00562461⟩

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