一次重雾霾天气成因及湿清除特征分析

发布时间：2018-04-15 21:40

  本文选题：雾霾天气 + 稳定层结　； 参考：《气候与环境研究》2017年06期

【摘要】：为了深入了解发生在武汉地区一次重雾霾天气过程的气象条件、污染源和污染物的湿清除特征,本文利用空气质量监测资料、地面观测资料和遥感火点监测资料和实测雨滴谱资料,详细分析了这次过程。结果表明:此次持续10 d的重雾霾天气过程发生在高压天气系统和静风条件下,辐射降温形成的稳定逆温边界层结构有利于污染气溶胶的积累和雾霾的形成和发展,尤其是来自南方持续不断的湿平流使雾霾天气得以长时间持续和发展,整个雾霾天气期间能见度均小于2 km,最低能见度不足50 m。2014年11月23~24日降水过程对此类污染物有明显的清除效果,清除率最高的是颗粒物污染,NO_2、SO_2和CO次之,最差的是O_3,通过与Scott(1982)按平均碰并系数E(E=0.65)得到的清除率和雨强的关系比较,武汉地区稳定性降水对气溶胶的平均碰并系数可取0.25~0.35。
[Abstract]:In order to understand the meteorological conditions of a heavy haze weather process, the characteristics of pollution sources and the wet removal of pollutants in Wuhan area, air quality monitoring data are used in this paper.The process is analyzed in detail by ground observation data, remote sensing fire monitoring data and observed raindrop spectrum data.The results show that the heavy haze weather process which lasts 10 days occurs in high pressure weather system and static wind. The stable boundary layer structure formed by radiation cooling is conducive to the accumulation of polluted aerosols and the formation and development of haze.In particular, the persistent wet advection from the South has allowed haze weather to persist and develop for a long time.During the whole haze weather, the visibility was less than 2 km.The minimum visibility was less than 50 m.2014 and the precipitation process from 23 to 24 November 2014 had obvious effect on the removal of these pollutants.The worst one is O _ 3s. Compared with Scott's 1982), the average collision coefficient of stable precipitation in Wuhan area is 0.25 ~ 0.35, compared with the average collision coefficient E ~ (0. 65)).
【作者单位】： 武汉市气象局;湖北省气象服务中心;武汉中心气象台;
【基金】：国家重点研发计划2016YFA0601704、2016YFC0203304 湖北省气象局科技发展基金2016Y02、2016Q10~~
【分类号】：X513
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本文编号：1755923