| 中纬度地区混合云中稳定同位素分馏的数学模拟—以乌鲁木齐降水为例(英) |
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| 引用本文： | 章新平,姚檀栋,田立德,刘晶淼,MasayoshiNAKAWO.中纬度地区混合云中稳定同位素分馏的数学模拟—以乌鲁木齐降水为例(英)[J].大气科学进展,2003(2). |
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| 作者姓名： | 章新平 姚檀栋 田立德 刘晶淼 MasayoshiNAKAWO |
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| 作者单位： | College of Resources and Environment Sciences，Hunan Normal University，Laboratory of Ice and Cold Regions Environment，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Laboratory of Ice and Cold Regions Environment，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Chinese Academy of Meteorological Sciences，Research Institute for Humanity and Nature Changsha 410081 Chinese Academy of Meteorological Sciences，Beijing 100081，Lanzhou 730000，Lanzhou 730000，Beijing 100081，Kyoto 602-0878，Japan |
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| 基金项目： | This work was supported by the National High Technology Research and Development Program of China (863 Program, Grant No. 2002AA135360), the National Natural Science Foundation of China (Grant No. 40271025), the National Key Research Project (Grant No. |
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| 摘 要： | 介绍的数学模型考虑了混合云中液、固态共存时以及冰面过饱和环境下稳定同位素的动力分馏效应。利用该数学模型,模拟了不同冷却条件下稳定同位素的温度效应。在相同的湿度条件下,湿绝热冷却过程中δ18O随温度的变化率小于等压冷却过程。冰面过饱和比Si的增大意味着动力分馏效应的增大。与平衡态相比,它的作用使得稳定同位素的综合分馏系数减小,从而使得降水中δ18O随温度的变化趋缓。模拟显示,湿绝热冷却过程中大气水线(MWL:=bδ18o+d)的斜率b和常数d均大于等压冷却过程。全球大气水线位于湿绝热冷却过程和等压冷却过程条件下分别模拟的两条大气水线之间。b和d的大小与Si呈正比。Si愈大,动力分馏效应愈强,b和d也愈大。反之亦然。然而,b和d的大小对云中含水量的变化具有低的敏感性。利用动力分馏模式模拟了乌鲁木齐降水中稳定同位素的变化。模拟的稳定同位素比率-温度以及δD-δ18O曲线分别与乌鲁木齐实测的稳定同位素比率-温度同归线以及大气水线有非常好的一致性。
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| 关 键 词： | 稳定同位素 分馏 动力效应 温度效应 大气水线 |
Simulations of Stable Isotopic Fractionation in Mixed Cloud in Middle Latitudes-Taking the Precipitation at Urumqi as an Example |
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| ZHANG Xinping YAO Tandong LIU JingmiaoTIAN Lide,and Masayoshi NAKAWOCollege of Resources and Environment Sciences,Hunan Normal University,Changsha Chinese Academy of Meteorological Sciences,Beijing Laboratory of Ice and Cold Regions Environment,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou Research Institute for Humanity and Nature,Kyoto -,Japan.Simulations of Stable Isotopic Fractionation in Mixed Cloud in Middle Latitudes-Taking the Precipitation at Urumqi as an Example[J].Advances in Atmospheric Sciences,2003(2). |
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| Authors: | ZHANG Xinping YAO Tandong LIU JingmiaoTIAN Lide and Masayoshi NAKAWOCollege of Resources and Environment Sciences Hunan Normal University Changsha Chinese Academy of Meteorological Sciences Beijing Laboratory of Ice and Cold Regions Environment Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou Research Institute for Humanity and Nature Kyoto - Japan |
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| Institution: | ZHANG Xinping YAO Tandong LIU JingmiaoTIAN Lide,and Masayoshi NAKAWOCollege of Resources and Environment Sciences,Hunan Normal University,Changsha 410081Chinese Academy of Meteorological Sciences,Beijing 100081 Laboratory of Ice and Cold Regions Environment,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000 Research Institute for Humanity and Nature,Kyoto 602-0878,Japan |
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| Abstract: | |
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| Keywords: | stable isotopes fractionation kinetic effect temperature effect meteoric water line |
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