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孟晓艳, 王普才, 王庚辰, 余环, 宗雪梅. 北京及其周边地区冬季SO2的变化与输送特征[J]. 气候与环境研究, 2009, 14(3): 309-317. DOI: 10.3878/j.issn.1006-9585.2009.03.08
引用本文: 孟晓艳, 王普才, 王庚辰, 余环, 宗雪梅. 北京及其周边地区冬季SO2的变化与输送特征[J]. 气候与环境研究, 2009, 14(3): 309-317. DOI: 10.3878/j.issn.1006-9585.2009.03.08
Variation and Transportation Characteristics of SO2 in Winter[J]. Climatic and Environmental Research, 2009, 14(3): 309-317. DOI: 10.3878/j.issn.1006-9585.2009.03.08
Citation: Variation and Transportation Characteristics of SO2 in Winter[J]. Climatic and Environmental Research, 2009, 14(3): 309-317. DOI: 10.3878/j.issn.1006-9585.2009.03.08

北京及其周边地区冬季SO2的变化与输送特征

Variation and Transportation Characteristics of SO2 in Winter

  • 摘要: 利用实施北京市奥运空气质量保障计划“北京市与周边地区空气污染物的输送、转化及北京市空气质量目标研究”项目的有利时机,于2007年1月15~27日在中国科学院大气物理研究所北京站、香河站和兴隆站,采用先进的差分吸收光谱仪(DOAS)和SO2气体分析仪取得了高质量SO2浓度的连续观测资料,同时还获取了相应的常规气象资料和系留气艇探测的常规气象参数廓线资料。分析和讨论了北京及其周边地区的SO2污染的变化过程特征、日变化特征、输送特征、源排放特征以及与天气过程和气象条件的紧密联系。研究表明:1)北京站、香河站和兴隆站的SO2浓度逐日变化明显,变化趋势一致,通常处于同一个天气系统控制之下,SO2污染呈现区域性分布特征。2)冬季SO2浓度日变化明显,夜晚最高,15时(北京时)最低。3)SO2浓度与大气稳定度、风速、风向密切相关,风速越小、大气越稳定,SO2浓度越高;当吹西南风时,SO2浓度升高,西北风时浓度明显降低。4)HYSPLIT后向轨迹数值模拟结果和OMI卫星反演表明周边地区的SO2长距离输送对站点的贡献不能忽视。

     

    Abstract: Taking the advantage of the project “The study of the transportation and transformation of air pollutants in Beijing and its surrounding areas and the objective of air quality in Beijing”, which is of the program of air quality assurance for Beijing 2008 Olympic Games, the continuous observations of SO2 concentrations were made with two advanced DOAS(Differencial Optical Absorption Spectroscopy) instruments and a gas analyzer in the premises of the Institute of Atmospheric Physics, Xianghe Atmospheric Integrated Observatory, and Xinglong Atmospheric Composition Background of Chinese Academy of Sciences during 15〖CD*2〗27 January 2007. Meanwhile, the meteorological observations were conventionally made with the 32 m tower equipped with a set of meteorological instruments, and the meteorological parameter profiles were obtained by tethered balloons. Based on the measurements in these sites, the aspects of processes, variations, transportations, emissions of the SO2 pollution in Beijing and its surrounding areas, and its relationships with weather processes or conditions, are analyzed. The results are as follows: 1) The daily variations in the three sites are obvious and the tendency is the same. This implies that for Beijing and its surrounding areas, it is usually under the control of the same weather system. Therefore, SO2 pollution is regional. 2) The SO2 concentration has an obvious diurnal variation with the highest concentration at night and lowest at 1500 LST. 3) There is a close relationship between the variation of SO2 concentration and atmospheric stability, wind speed and wind direction. The smaller the wind speed and atmosphere stability is, the higher SO2 concentration is. Higher SO2 concentration is from southwest direction. 4) Simulations of the backward trajectory model HYSPLIT and OMI SO2 retrievals indicate that long path transportation of SO2 from surrounding areas can not be neglected.

     

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