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A 108.83-m ice-core record of atmospheric dust deposition at Mt. Qomolangma (Everest), Central Himalaya |
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| Authors: | Jianzhong Xu Dahe Qin Paul Andrew Mayewski Barbara Delmonte Jiawen Ren Sungmin Hong |
| Institution: | a State Key Laboratory of Cryospheric Sciences (SKLCS), Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (CAS), Lanzhou, China b Climate Change Institute (CCI) and Department of Earth Sciences, University of Maine, Orono ME 04469, USA c Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS-Université Joseph Fourier, St Martin d'Hères, France d Institute of Tibetan Plateau Research (ITP), Chinese Academy of Sciences (CAS), Beijing, China e Korea Polar Research Institute (KOPRI), Incheon 406-840, Korea f MOE, Key Laboratory for Coast and Island Development, School of Geographic and Oceanographic Sciences (SGOS), Nanjing University, Nanjing 210093, China |
| 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. |
| Keywords: | Dust Ice core Qomolangma (Everest) Himalaya |
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