摘要
为深入了解西安市大气污染程度,对2015年西安市主要大气污染物(SO_2、NO_2、CO、PM_(2.5)、PM_(10)、O_3)的空气质量指数进行了逐日变化分析、相关性分析及空间插值分析。结果表明:SO_2、NO_2、CO、PM_(2.5)、PM_(10)空气质量指数春冬季高于夏秋季,而O_3空气质量指数则是春冬季低于夏秋季。11月和12月份污染较为严重。在4个季度中,PM_(2.5)和PM_(10)与气态污染物SO_2、CO、NO_2均呈正相关,说明PM_(2.5)、PM_(10)与这3种气态污染物具有同源性。SO_2与CO、NO_2均呈显著性正相关,三者均受化石燃料燃烧及机动车尾气影响。O_3与CO、SO_2相关性不大,与NO_2在二季度呈现正相关。SO_2、NO_2、PM_(2.5)、CO、PM_(10)多聚集在高新西区、莲湖区、碑林区、经开区、雁塔区、长安区,O_3多聚集在阎良区、未央区和灞桥区。
An investigation on the spatial and temporal variation and correlation analysis of atmospheric pollutants（SO_2,NO_2,CO,PM_（2.5）,PM_（10）,O_3） in 2015 was done to understand the level of atmospheric pollution in Xi＇an City.The results showed that the air quality index of SO_2,NO_2,CO,PM_（2.5）,PM_（10） in autumn and winter was higher than in spring and summer,but the air quality index of O_3 in spring and winter was lower in summer and autumn.Atmospheric pollution in November and December was more serious than in other months of the year.In four seasons,PM_（2.5） and PM_（10） were positively correlated with the gaseous pollutants SO_2,CO and NO_2.The correlation was indicated that they had the same origin.SO_2 was positively correlated with CO and NO_2,they were affected by fossil fuel combustion and vehicle exhaust.O_3 had little correlation with CO and SO_2,but had a positive correlation with NO_2 in the second season.SO_2,NO_2,PM_（2.5）,CO,PM_（10） gathered in the west of Gaoxin District,Lianhu District,Beilin District,Jingkai District,Yanta District,Changan District,and O_3 were concentrated in Yanliang District,Weiyang District and Baqiao District.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第12期86-91,共6页
Environmental Engineering
基金
陕西省科技厅资助项目(205JM5226)
陕西省教育厅专项科研计划项目(16JK1469)
关键词
西安
大气污染物
空气质量指数
相关性
空间插值分析
Xi＇an
atmospheric pollutants
air quality index
correlation
spatial interpolation analysis
