| Tropospheric pyruvate changes in the remote area of northwestern China |
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| 作者姓名： | 李心清 秦大河 江伟 蒋倩 |
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| 作者单位： | State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China，Laboratory of Ice Core and Cold Region Environment，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzhou 730000，China，State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China，State Key Laboratory of Environmental Geochemistry，Institute of Geochemistry，Chinese Academy of Sciences，Guiyang 550002，China |
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| 基金项目： | 国家自然科学基金，中国科学院资助项目 |
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| 摘 要： | Pyruvate is a light carboxylate in the troposphere and can act as potential cloud condensation nuclei. Due to its low concentrations, however, little work has been done on the species in precipitation. Past 43-year record of pyruvate was recovered from an ice core of Glacier 1 at 43°06′N and 86°49′E in the remote East Tianshan, northwestern China. It was revealed that pyruvate varied over a relatively large range with some below the detection limit, while part of it is so high as to be up to 70 ng·g-1. With an average concentration of 4.1 ± 8.1 ng·g-1 (mean ± 1σ, N=543), pyruvate is a minor species in comparison with other carboxylates. It is also low as compared with its precipitation in other parts of the world, suggesting a difference in its major source flux. The record revealed high pyruvate concentrations in the late halves of the 1950s and 1980s, but low in the late 1950s, late 1970s, and middle 1990s. The variation trend in the past 43 years is closely correlated with that of acetate, a major carboxylate from anthropogenic pollution to the atmosphere, indicating that tropospheric pyruvate in the remote area of northwestern China is probably a by-product in acetate formation.
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| 关 键 词： | 中国 西北地区 丙酮酸盐 对流层 大气化学 有机酸 环境污染 |
Tropospheric pyruvate changes in the remote area of northwestern China |
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| Xinqing Lee,Dahe Qin,Wei Jiang,Qian Jiang.Tropospheric pyruvate changes in the remote area of northwestern China[J].Chinese Journal of Geochemistry,2005,24(3):201-207. |
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| Authors: | Xinqing Lee Dahe Qin Wei Jiang Qian Jiang |
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| Institution: | (1) State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550002 Guiyang, China;(2) Laboratory of Ice Core and Cold Region Environment, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 730000 Lanzhou, China |
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| Abstract: | Pyruvate is a light carboxylate in the troposphere and can act as potential cloud condensation nuclei. Due to its low concentrations,
however, little work has been done on the species in precipitation. Past 43-year record of pyruvate was recovered from an
ice core of Glacier 1 at 43°06′N and 86°49′E in the remote East Tianshan, northwestern China. It was revealed that pyruvate
varied over a relatively large range with some below the detection limit, while part of it is so high as to be up to 70 ng·g−1. With an average concentration of 4.1±8.1 ng·g−1 (mean±1σ, N=543), pyruvate is a minor species in comparison with other carboxylates. It is also low as compared with its
precipitation in other parts of the world, suggesting a difference in its major source flux. The record revealed high pyruvate
concentrations in the late halves of the 1950s and 1980s, but low in the late 1950s, late 1970s, and middle 1990s. The variation
trend in the past 43 years is closely correlated with that of acetate, a major carboxylate from anthropogenic pollution to
the atmosphere, indicating that tropospheric pyruvate in the remote area of northwestern China is probably a by-product in
acetate formation.
Financial support by the National Natural Science Foundation of China (Grant No. 40073035) and the Chinese Acadeny of Sciences. |
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| Keywords: | atmospheric chemistry organic acid carboxylate environment pollution precipitation |
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