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Geochemical characteristics and zones of surface snow on east Antarctic Ice Sheet

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Chinese Science Bulletin

Abstract

The surface-snow geochemical characteristics are discussed on the East Antarctic Ice Sheet, depending on the stable isotopes ratios of oxygen and hydrogen, concentration of impurities (soluble-ions and insoluble micro-particle) in surface snow collected on the ice sheet. The purpose is to study geochemical zones on the East Antarctic Ice Sheet and to research sources and transportation route of the water vapor and the impurities in surface snow. It has been found that the ratio coefficients, as S1, d1 in the equation δD =S 1δ18O +d 1, are changed near the elevation 2000 m on the ice sheet. The weight ratio of C1−/Na+ at the area below the elevation of 2000 m is close to the ratio in the sea salt; but it is about 2 times that of the sea salt, at the inland area up to the elevation of 2000 m. The concentrations of non-sea-salt Ca2+ ion (nssCa2+) and fine-particle increase at the interior up to the elevation 2000 m. At the region below the elevation of 2000 m, the impurity concentration is decreasing with the elevation increasing. Near coastal region, the surface snow has a high concentration of impurity, where the elevation is below 800 m. Combining the translating processes of water-vapor and impurities, it suggests that the region up to the elevation 2000 m is affected by large-scale circulation with longitude-direction, and that water-vapor and impurities in surface snow come from long sources. The region below the elevation 2000 m is affected by some strong cyclones acting at peripheral region of the ice sheet, and the sources of water and impurities could be at high latitude sea and coast. The area below elevation 800 m is affected by local coastal cyclones.

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Author notes

  1. Dahe Qin

    Present address: China Meteorological Administration, 100081, Beijing, China

Authors and Affiliations

  1. Polar Research Institute of China, 200129, Shanghai, China

    Jiancheng Kang, Leibao Liu, Dali Wang, Jiahong Wen, Dejun Tan & Xiaowei Zhang

  2. Geography Department of Lanzhou University, 730000, Lanzhou, China

    Jiancheng Kang & Xiaowei Zhang

  3. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000, Lanzhou, China

    Dahe Qin & Zhongqin Li

  4. Australian Antarctic Division and Antarctic Climate and Ecosystems CRC, Private Bag 80, 7001, Hobart, Tasmania, Australia

    Jun Li

Authors
  1. Jiancheng Kang
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  2. Leibao Liu
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  3. Dahe Qin
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  4. Dali Wang
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  7. Zhongqin Li
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  8. Jun Li
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  9. Xiaowei Zhang
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Correspondence to Jiancheng Kang.

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Kang, J., Liu, L., Qin, D. et al. Geochemical characteristics and zones of surface snow on east Antarctic Ice Sheet. Chin.Sci.Bull. 49, 2205–2211 (2004). https://doi.org/10.1007/BF03185789

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