华北平原一次严重区域雾霾天气分析与数值预报试验

doi:10.7523/j.issn.2095-6134.2014.03.007

中国科学院大学学报 ›› 2014, Vol. 31 ›› Issue (3): 337-344.DOI: 10.7523/j.issn.2095-6134.2014.03.007

• 大气颗粒物与空气污染专刊 • 上一篇下一篇

华北平原一次严重区域雾霾天气分析与数值预报试验

张小玲^1,2, 唐宜西^1,2, 熊亚军³, 张仁健⁴, 孟伟¹, 曹晓彦¹

1. 中国气象局北京城市气象研究所, 北京 100089;
2. 成都信息工程学院大气科学学院, 成都 620225;
3. 北京市气象台, 北京 100089;
4. 中国科学院大气物理研究所, 北京 100029

收稿日期:2013-06-25 修回日期:2013-12-20 发布日期:2014-05-15
通讯作者: 张小玲，E-mail：xlzhang@ium.cn
基金资助:
国家自然基金（41075111，41030107）和公益性行业（气象）专项（GYHY200806027，GYHY201206015）资助

Analysis and numerical forecast of a regional fog-haze in North China plain

ZHANG Xiaoling^1,2, TANG Yixi^1,2, XIONG Yajun³, ZHANG Renjian⁴, MENG Wei¹, CAO Xiaoyan¹

1. Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China;
2. Chengdu University of Information Technology, Chengdu 620225, China;
3. Beijing Meteorological Observatory, Beijing 100089, China;
4. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Received:2013-06-25 Revised:2013-12-20 Published:2014-05-15

摘要/Abstract

摘要：

针对2013年1月27—31日中国华北平原地区持续5d的雾霾天气进行综合分析和数值预报.研究表明，雾霾过程期间华北平原高空以平直纬向环流为主，没有明显冷空气活动，地面多为风速小、相对湿度较大等不利于污染物扩散和稀释的弱气压场；大气层结构稳定、低空逆温频率高强度大，且存在明显的低层逆湿条件，边界层内污染物的水平和垂直扩散能力差.稳定、高湿的气象条件对细粒子PM_2.5质量浓度的形成、积聚和维持比较有利，造成严重的区域性低能见度和雾霾天气.气象化学耦合模式WRF-Chem预报系统对此次雾霾过程期间天气系统演变和PM_2.5质量浓度的空间分布及高浓度持续时间、消散减弱等过程做出了较好的预报.模式预报出雾霾期间PM_2.5质量浓度在京津冀平原地区达到300μg/m³严重污染，主要分布在北京城区及以南的河北、天津等重点城市和区域，部分地区可达400μg/m³以上，与华北地形和城市群分布有很好的对应关系，在华北平原山前容易形成气流的辐合区和高污染区.

关键词: 华北平原, 区域雾霾, PM_2.5浓度, 气象条件, WRF-Chem数值预报

Abstract:

We analyzed the weather situation, boundary layer structure, and PM_2.5 concentration during the haze-fog event of 27 to 31 Jan 2013 occurred in the North China plain(NCP). The weather conditions indicated that latitudinal circulation and weak pressure system controlled the NCP area during that period. There were continuous inversion layer and stable structure within the boundary layer. The surface and lower level wind was usually less 2 m/s, and relative humidity was higher. Such stable weather situation and high emissions were favorable to pollutant accumulation and fine aerosol's formation. Then, the high PM_2.5 concentration directly leaded to low visibility and heavy fog-haze. Real-time WRF-Chem model made a good forecast for the PM_2.5 concentration and the haze spatio-temporal distribution and evolution in the NCP area. The wind convergence and pollutant accumulation usually occurred along the mountain edge and in the NCP area.

Key words: North China plain, regional haze-fog, PM_2.5, meteorological condition, WRF-Chem forecast

中图分类号:

P413

张小玲, 唐宜西, 熊亚军, 张仁健, 孟伟, 曹晓彦. 华北平原一次严重区域雾霾天气分析与数值预报试验[J]. 中国科学院大学学报, 2014, 31(3): 337-344.

ZHANG Xiaoling, TANG Yixi, XIONG Yajun, ZHANG Renjian, MENG Wei, CAO Xiaoyan. Analysis and numerical forecast of a regional fog-haze in North China plain[J]. , 2014, 31(3): 337-344.

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华北平原一次严重区域雾霾天气分析与数值预报试验

Analysis and numerical forecast of a regional fog-haze in North China plain

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