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北京地区冬季重污染期间的雾层特征

田润泽 徐峻 张众志 唐枷榕 程苗苗

田润泽,徐峻,张众志,等.北京地区冬季重污染期间的雾层特征[J].环境工程技术学报,2022,12(4):975-984 doi: 10.12153/j.issn.1674-991X.20210670
引用本文: 田润泽,徐峻,张众志,等.北京地区冬季重污染期间的雾层特征[J].环境工程技术学报,2022,12(4):975-984 doi: 10.12153/j.issn.1674-991X.20210670
TIAN R Z,XU J,ZHANG Z Z,et al.Characteristics of fog layer during heavy pollution in winter in Beijing[J].Journal of Environmental Engineering Technology,2022,12(4):975-984 doi: 10.12153/j.issn.1674-991X.20210670
Citation: TIAN R Z,XU J,ZHANG Z Z,et al.Characteristics of fog layer during heavy pollution in winter in Beijing[J].Journal of Environmental Engineering Technology,2022,12(4):975-984 doi: 10.12153/j.issn.1674-991X.20210670

北京地区冬季重污染期间的雾层特征

doi: 10.12153/j.issn.1674-991X.20210670
基金项目: 国家自然科学基金项目(41575127);国家重点研发计划项目(2019YFC0214800)
详细信息
    作者简介:

    田润泽(1997—),男,硕士,主要从事区域空气污染研究,rztian0619@gmail.com

    通讯作者:

    徐峻(1969—),男,研究员,博士,主要从事区域空气污染研究,xujun@craes.org.cn

  • 中图分类号: X51

Characteristics of fog layer during heavy pollution in winter in Beijing

  • 摘要:

    大多数针对北京地区冬季重污染过程的研究侧重于气溶胶,关于该过程中雾的研究较少。利用北京南郊观象台L波段探空和地面气象观测资料,以及MODIS和VISSR卫星数据等,对2013年1月12—15日北京地区重污染期间的雾进行分析,发现4 d中共发生2次辐射雾和2次平流雾,每天的雾在类型、垂直分布、形成过程、层结等方面都完全不同:12日清晨为充分发展的辐射雾,辐射雾的生成和发展使近地层稳定层结转变为近中性;13日清晨为2层相连的高空平流雾,分别来自不同源地,平流雾的到来造成近地层雾的消散,也使低层大气扩散能力有所加强;14日清晨出现辐射雾,其发展仅限于初生阶段,生存时间仅约2 h,期间存在贴地逆温;15日清晨为加深的平流雾,较前1天夜间的平流雾,雾顶高度抬升约500 m。鉴于北京地区冬季重污染过程中,雾在形成过程、垂直结构和层结影响等方面呈现出的复杂和多变的状况,针对重污染期间雾层的研究,以及其在垂直扩散和辐射等方面的效应研究都有待加强。

     

  • 图  1  2013年1月12—15日地面气象要素与PM2.5浓度的日变化

    注:图中竖虚线为探空仪施放时间。彩色阴影为雾的过程:Ⅰ为12日清晨的辐射雾;Ⅱ为13日清晨的平流雾,其中,Ⅱa为12日夜间的辐射雾,Ⅱb为高空平流雾到达,地面雾加深,Ⅱc为平流雾持续,地面雾消散;Ⅲ为14日清晨的辐射雾;Ⅳ为15日持续发展的平流雾。

    Figure  1.  Diurnal variation of surface meteorological elements and PM2.5 concentrations in January 12-15, 2013

    图  2  2013年1月12日的探空和MODIS影像

    Figure  2.  Radiosonde and MODIS images on January 12, 2013

    图  3  2013年1月13日的探空和MODIS影像

    Figure  3.  Radiosonde and MODIS images on January 13, 2013

    图  4  2013年1月14日的探空和MODIS影像

    Figure  4.  Radiosonde and MODIS images on January 14, 2013

    图  5  2013年1月15日的探空和MODIS与VISSR影像

    Figure  5.  Radiosonde and MODIS images on January 15, 2013

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  • 收稿日期:  2021-11-12
  • 录用日期:  2022-04-02

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