北京一次浮尘事件的沙尘化学特征

doi:10.7523/j.issn.2095-6134.2007.5.028

中国科学院大学学报 ›› 2007, Vol. 24 ›› Issue (5): 720-723.DOI: 10.7523/j.issn.2095-6134.2007.5.028

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北京一次浮尘事件的沙尘化学特征

周家茂张仁健石磊刘阳

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；
2 中国科学院大气物理研究所，北京 100029；
3 中国科学院研究生院

收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2007-09-15

Chemical characterization of dust in a floating dust event over Beijing

ZHOU Jia-Mao, ZHANG Ren-Jian, SHI Lei, LIU Yang

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

Received:1900-01-01 Revised:1900-01-01 Published:2007-09-15

摘要/Abstract

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

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.

Key words: Floating dust, elemental concentration, size distribution, remote sources

中图分类号:

X13161

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]. 中国科学院大学学报, 2007, 24(5): 720-723.

ZHOU Jia-Mao, ZHANG Ren-Jian, SHI Lei, LIU Yang. Chemical characterization of dust in a floating dust event over Beijing[J]. , 2007, 24(5): 720-723.

北京一次浮尘事件的沙尘化学特征

Chemical characterization of dust in a floating dust event over Beijing

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