| Grain size record of microparticles in the Muztagata ice core |
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| 基金项目： | The National Basic Research Program of China，the Collective Innovation of the the National Natural Science Foundation of China，the Program of the NNSFC，the Chinese Academy of Sciences |
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| 摘 要： | Dust grain size is a proxy for wind strength that en-trains it. Mineral aerosol blown from arid continent to remote sites has a broad diameter range, from less than 0.5 μm to larger than 75 μm1]. For a long time, geolo-gists reveal the transport and sediment characteristics using grain size and size distribution. In loess research, grain size is widely used as the proxy for winter mon-soon strength2,3]. Fractions entrained by the westerlies and winter monsoon can be discerned by grain size…
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| 收稿时间： | 29 September 2004 |
| 修稿时间： | 11 August 2005 |
Grain size record of microparticles in the Muztagata ice core |
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| Authors: | WU Guangjian YAO Tandong XU Baiqin LI Zheng TIAN Lide DUAN Keqin WEN Linke |
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| Institution: | 1. Laboratory of Environment and Process on Tibetan Plateau, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China;Key Laboratory of Cryosphere and Environment, Jointly Established by Cold and Arid Regions Environmental and Engineering Research Institute and Institute of Tibetan Plateau Research, Chinese Academy of Sciences and Chinese Academy of Meteorological Sciences, China Meteorological Administration, Lanzhou 730000, China
2. Key Laboratory of Cryosphere and Environment, Jointly Established by Cold and Arid Regions Environmental and Engineering Research Institute and Institute of Tibetan Plateau Research, Chinese Academy of Sciences and Chinese Academy of Meteorological Sciences, China Meteorological Administration, Lanzhou 730000, China |
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| Abstract: | The dust transport and sediment characteristics are discussed based on analysis of microparticle size and size distribution
in the Muztagata ice core at 6350 m a.s.l. The finer particles with diameter of 1-5 μm are the dominant fraction in number,
while middle and coarse particles mainly contribute to the total volume. The lognormal distribution characteristics can be
seen for some high concentration samples, showing that model size and standard variation are greater than that in the Greenland
ice cores. However, size-volume distribution of some low concentration samples is abnormal. Those distributions reflect the
dust deposit process in high mountain glaciers at mid-low latitudes and show differences from those in polar ice sheet. |
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| Keywords: | Muztagata ice core microparticle dust size distribution |
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