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2013-2016年北京朝阳站PM2.5浓度变化及受地面风的影响
贾小芳1, 颜鹏1, 张晓春1, 李杨1, 郭伟1, 董璠2
(1.中国气象局气象探测中心;2.中国气象局京津冀环境气象预报预警中心)
The PM2.5 concentration and affect by the ground wind in ChaoYang of Beijing during 2013-2016
JIA Xiaofang1, YAN Peng1, ZHANG Xiaochun1, LI Yang1, GUO Wei1, DONG Fan2
(1.Meteorological Observation Centre of CMA;2.Environmental Meteorological Forecast Center of Beijing-Tianjin-Hebei)
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投稿时间:2017-06-08    修订日期:2018-02-27
中文摘要: 利用2013年4月~2016年3月北京朝阳环境气象站PM2.5质量浓度和同步地面风数据,重点分析了PM2.5质量浓度的变化特点及受地面风的影响,结果显示:观测期间测点PM2.5平均质量浓度为82.1 ?g/m3,季节变化特征明显,冬季最高、夏季最低。测点主导风向为ENE-E-ESE,风速集中在0.2~2 m/s之间。PM2.5质量浓度在ENE-E-ESE方向最高,WNW-NW-NNW方向最低。风来自东北方向时PM2.5质量浓度波动较大,PM2.5/PM10较小;来自偏南方向时波动小,PM2.5/PM10较大,污染源较稳定。PM2.5质量浓度随风速增大先上升后下降,在0.4 m/s时达最高,为139.6 ?g/m3。风速在0.2~2 m/s时主要受ENE-E-ESE方向影响,而2~6 m/s时主要受ESE方向影响较大。PM2.5集中浓度区间跨度在ENE-E-ESE方向最大,也能与该方向的垃圾填埋场和垃圾焚烧厂有关。PM2.5质量浓度异常值主要出现在NE-ENE方向、NW方向和小风时。
中文关键词: PM2.5,质量浓度,地面风
Abstract:Using PM2.5 concentration and the synchronous meteorological data analyzed the character of PM2.5 concentration and the affect by the surface wind during april 2013 to march 2016 in Chaoyang environmental meteorological station in Beijing. The results show that the average concentration of PM2.5 was 82.1 ?g/m3 and the seasonal variation was obvious with the highest concentration in winter and lowest in summer. The dominant wind direction was ENE-E-ESE, and the wind speed was concentrated between 0.2~2m/s. The PM2.5 mass concentration was highest in the ENE-E-ESE and lowest in WNW-NW-NNW. When the wind came from the northeast, the concentration of PM2.5 fluctuated greatly and the PM2.5/PM10 was smaller, while from the south the concentration of PM2.5 fluctuated Slightly and the PM2.5/PM10 was larger, the pollution source was relatively stable. When the wind comes from the northeast direction, the mass concentration of PM2.5 fluctuates more, the PM2.5/PM10 is smaller, the fluctuation is smaller than the southerly direction, the PM2.5/PM10 is larger, and the pollution source is relatively stable.With the increase of wind speed the concentration of PM2.5 increased first and then decreased. The PM2.5 concentration was highest (139.6 ?g/m) at 0.4 m/s. When the wind speed between 0.2-2m/s, the PM2.5 concentration was highest in ENE-E-ESE while 2-6 m/s in ESE. The range of PM2.5 concentration was large in ENE-E-ESE. That may be related to the landfills and waste incinerators in E. The abnormal value of PM2.5 occurred in NE-ENE, NW and low wind.
文章编号:201706080297     中图分类号:P427    文献标志码:
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引用文本:
贾小芳,颜鹏,张晓春,李杨,郭伟,董璠,0.[en_title][J].Meteor Mon,():-.
JIA Xiaofang,YAN Peng,ZHANG Xiaochun,LI Yang,GUO Wei,DONG Fan,0.The PM2.5 concentration and affect by the ground wind in ChaoYang of Beijing during 2013-2016[J].Meteor Mon,():-.