摘要
采用"十二五"期间黔江城区大气观测数据,结合多元统计分析方法,研究了气象因子与空气污染指数(API)及PM10,SO2,NO2的质量浓度变化特征关系.结果表明:气象因素对空气质量变化产生一定影响,降水对改善空气质量作用明显,日降水量为24mm时,API下降值达到最大,日降水量持续达到49mm以上时,净化作用减弱.气压、温度、湿度对API,PM10质量浓度影响较大;风向、风速对API、污染物质量浓度影响程度不大,风向在低风速区对空气质量变化产生一定影响.相关分析表明,降水对API,PM10的相关性分析具有统计学意义(p<0.05),对SO2,NO2影响的相关性分析极具统计学意义(p<0.01);气压、温度、湿度、风速、风向对API,PM10,SO2,NO2影响的相关性分析极具统计学意义(p<0.01).因子分析表明,气压、温度、湿度、风速对黔江城区大气质量影响较为明显.
Combined with multivariate statistics analysis methods,systematic analysis has been implemented on the influence of meteorological factors on the air pollution index API,the concentration of PM10,SO2,NO2,based on the air quality parameter data of the Qianjiang District in 'the Dozenth Quinquennium'.The results show significant meteorological influence on the air quality,in particular,precipitation plays a significantly purified role on air quality,the air pollution index API declined to an extreme value when a daily precipitation of 24 mm appeared,while the purified function abated when the daily precipitation reached at 49 mm.And,conspicuous effects are expressed by air pressure,temperature and humidity on APIand the concentrations of PM10.Only unconspicuous effects are displayed by wind speed and wind direction on air quality,wind direction has an impact on air quality only under the condition of low wind speed.What′s more,Correlation analysis was also conducted on all the parameters,which indicated significant impact of precipitation on API,PM10,and very significant impact on SO2,NO2.Very significant impact of the other meteorological factors was also presented on API,PM10,SO2 and NO2.In addition,the factor analysis indicates that atmospheric pressure,temperature,humidity and wind speed have evident impact on the air quality of Qianjiang District.
出处
《西南师范大学学报（自然科学版）》
CAS
北大核心
2017年第5期113-120,共8页
Journal of Southwest China Normal University(Natural Science Edition)
基金
重庆市基础科学与前沿技术研究项目(cstc2015jcyjA0002)
重庆市环境保护局科技项目(环科字2015CF第101号)
关键词
气象因子
大气质量
相关分析
因子分析
meteorological factors
air quality
correlation analysis
factor analysis
