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| 北京一次浮尘事件的沙尘化学特征 | |
| 引用本文： | 周家茂,张仁健,石磊,刘阳. 北京一次浮尘事件的沙尘化学特征[J]. 中国科学院研究生院学报, 2007, 24(5): 720-723 |
| 作者姓名： | 周家茂 张仁健 石磊 刘阳 |
| 作者单位： | 1. 中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,西安,710075;中国科学院大气物理研究所,北京,100029;中国科学院研究生院,北京,100049 2. 中国科学院大气物理研究所,北京,100029 |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
| 摘 要： | 本文以2000年4月北京一次浮尘天气完整的观测资料为例，进行元素化学分析。本次浮尘期间20种元素总质量浓度为181.49μg/m3，小于同一监测分析方法下沙尘暴期的总元素质量浓度，浮尘过后与1999年3月非沙尘期的元素总浓度相近。浮尘后Al, Fe, K, Ca, Si, Ti, Mn元素浓度谱分布图形状发生改变，可能暗示着新一轮的大气污染物积累。本次浮尘事件中粗细粒子中外来源的贡献量各不相同，分别为82.8%和34.5%。 |
| 关 键 词： | 浮尘 元素浓度 谱分布 外来源 |
| 文章编号： | 1002-1175(2007)05-0720-04 |
| 修稿时间： | 2007-03-02 |
Chemical characterization of dust in a floating dust event over Beijing |
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| ZHOU Jia-Mao,ZHANG Ren-Jian,SHI Lei,LIU Yang. Chemical characterization of dust in a floating dust event over Beijing[J]. Journal of the Graduate School of the Chinese Academy of Sciences, 2007, 24(5): 720-723 | |
| Authors: | ZHOU Jia-Mao ZHANG Ren-Jian SHI Lei LIU Yang |
| Affiliation: | 1 Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China 2 Institute of Atmospheric Physics, Chinese Academy of Science, Beijing 100029, China 3 Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | The chemical characteristics of a floating dust event in April 2000 over Beijing were analyzed based on observation data. The total mass concentration of 20 elements in floating dust period was 181.49 μg/m3, which is much smaller than that in dust storm with the same measurement and analysis method, bigger than that in non-dust period in Mar 1999. The size distributions of Al, Fe, K, Ca, Si, Ti, Mn were changed after the passage of floating dust, which may imply a new accumulation of atmospheric particles. The contributions of remote sources to coarse and fine particles in this case were 82.8% and 34.5%, respectively. |
| Keywords: | floating dust elemental mass concentration size distribution sources identification |
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