摘要
目的探讨北方沙尘天气过程对遂宁市环境空气质量的影响。方法利用遂宁市国控空气质量自动监测站监测数据和气象资料,分析2013年3月外来沙尘对该市大气颗粒物粒径分布及其浓度和空气质量的影响。结果外来沙尘的输入导致遂宁市出现11 d污染天气,空气污染指数(API)最高达187。沙尘天气时段大气中PM10浓度为非沙尘时段的1.98倍,小时浓度最高达0.772 mg/m3,是沙尘到来前的5.4倍,而气态污染物SO2和NO2浓度不受外来沙尘的影响。在沙尘时段,大气PM2.5在PM10中所占比例下降,PM2.5-10浓度及其在PM10中所占比例升高。结论此次沙尘天气过程导致遂宁市大气呈现以PM2.5-10为主要特征的空气污染。
Objective To study the impact of a northern dust-weather process on ambient air quality of Suining, Sichuan.Methods Based on the data of air quality automatic monitoring and meteorological data, the impact of the exotic dust on size distributions and concentrations of particles and the air quality of Suining were analyzed in March, 2013. Results Due to the input of the exotic dust, there were 11 polluted days in Suining and its API was up to 187. During the dust period, the concentration of PM10 was 1.98 times as high as that in the non-dust period, the largest hourly concentration of PM10 was up to 0.772 mg/m3, which increased 5.4 times compared with that before the arrival of the dust. However, the concentrations of SO2 and NO2were unaffected by the impact of extraneous dust. In the dust period, the proportion of PM2.5 in PM10 decreased rapidly, the concentration of PM2.5-10 and the proportion of PM2.5-10 in PM10 increased greatly. Conclusion The concerned dust-weather process cause air pollution characterised by PM2.5-10 in Suining.
出处
《环境与健康杂志》
CAS
北大核心
2015年第8期731-734,共4页
Journal of Environment and Health
基金
2013年中央财政主要污染物减排专项资金国家环境空气监测网建设项目(二期)实施方案
关键词
沙尘天气
空气质量
空气污染
颗粒物
Dust-weather
Air quality
Air pollution
Particulate matter
作者简介
唐红军（1973-），男，高级工程师，从事环境监测及大气污染防治研究。
通讯作者：刘兵，E-mail：bingliu@cqu．edu．cn
