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天津市夏季重污染天气过程PM2.5输送特征

孟丽红 郝天依 李培彦 吴彬贵 王雪莲

孟丽红, 郝天依, 李培彦, 吴彬贵, 王雪莲. 天津市夏季重污染天气过程PM2.5输送特征[J]. 环境工程技术学报, 2020, 10(1): 39-46. doi: 10.12153/j.issn.1674-991X.20190058
引用本文: 孟丽红, 郝天依, 李培彦, 吴彬贵, 王雪莲. 天津市夏季重污染天气过程PM2.5输送特征[J]. 环境工程技术学报, 2020, 10(1): 39-46. doi: 10.12153/j.issn.1674-991X.20190058
MENG Lihong, HAO Tianyi, LI Peiyan, WU Bingui, WANG Xuelian. Transport characteristics of PM2.5 of heavy pollution weather in Tianjin in summer[J]. Journal of Environmental Engineering Technology, 2020, 10(1): 39-46. doi: 10.12153/j.issn.1674-991X.20190058
Citation: MENG Lihong, HAO Tianyi, LI Peiyan, WU Bingui, WANG Xuelian. Transport characteristics of PM2.5 of heavy pollution weather in Tianjin in summer[J]. Journal of Environmental Engineering Technology, 2020, 10(1): 39-46. doi: 10.12153/j.issn.1674-991X.20190058

天津市夏季重污染天气过程PM2.5输送特征

doi: 10.12153/j.issn.1674-991X.20190058
详细信息
    作者简介:

    孟丽红(1979—),女,工程师,硕士,主要从事大气环境研究, menglh@126.com

  • 中图分类号: X513

Transport characteristics of PM2.5 of heavy pollution weather in Tianjin in summer

  • 摘要: 利用环境监测、气象常规观测、美国国家环境预报中心(NCEP)再分析等资料,采用气溶胶激光雷达和HYSPLIT模式对2018年8月1—2日发生在天津市夏季的一次重污染天气过程进行分析。结果表明:地面弱气压场、低空逆温和偏东暖湿气流的输送为此次重污染形成提供了有利条件;气溶胶激光雷达分析表明,此次污染过程存在明显的水平输送和垂直分布特征,市区PM2.5浓度升高除与水平输送有关,还与本地低空逆温造成的PM2.5积累密切相关;HYSPLIT模式后向轨迹追踪研究表明,PM2.5前期积累爬升阶段,气团主要来自偏南气流,200、500、1 000 m高度气团均有明显沉降,后期气团来向转变为较清洁的偏东暖湿气流,但同时带来大量水汽,造成天津市相对湿度的增加。此次污染过程前期是由于静稳天气形势导致PM2.5积累,后期主要是天津市各区县之间PM2.5的输送以及偏东暖湿气流输送水汽导致相对湿度的增加,污染进一步加重。

     

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出版历程
  • 收稿日期:  2019-04-17
  • 刊出日期:  2020-01-20

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