宜宾市大气污染时空分布及其气象因子分析

Temporal and spatial distribution of air pollution and its meteorological factors in Yibin city

本文分析了2010-2015年间宜宾市大气污染时空分布特征及与气象因子相关关系。结果表明:近6年来,宜宾市PM_(10)污染物浓度在2010-2015年整体呈上升趋势,NO_2和SO_2均呈下降趋势;从静稳天气来看,2014年冬季污染事件中属于静稳型天气的频率最高,尤其以1月份最为严重。根据气象因子分析来看,风速对污染物浓度影响较大,三小时变压与污染物浓度呈明显的相关性;具体造成宜宾市空气质量指数较高的天气形势有三种:西北气流型、西风气流型、西南气流型。

The author analyzes the air pollution characteristics and correlation of meteorological resource in Yibin from 2010 to 2015. Results show that PM10 shows an increasing trend, however, N〇2 and S〇2 in average overall have downward trends in Yibin nearly 6 years. The winter air pollution incidents in 2014 are the static stability of the highest frequency of weather, especially in January . The wind speed have influenced on the particle concentration. The pressure transformation in 3 hours and PM10 have showed a obvious correlation. There are three kinds of weather situations about the pollution in Yibin： the northwest air current, the west air current and the southwest air current.