摘要
利用2017—2019年洛阳市7个国控空气质量监测站的大气颗粒物PM_(2.5)、PM_(10)的质量浓度监测数据,研究洛阳市城区大气颗粒物浓度的时空变化特征及气象因素对其的影响。结果表明,2017—2019年洛阳市城区环境空气污染总体状况呈先降后增的趋势,其中,2018年空气质量整体状况最好,重度及以上的污染天数占全年有效天数的比例最低;2019年污染总天数相较于2017年减少10 d,但相较于2018年增加31 d;空气质量整体情况PM_(10)和PM_(2.5)浓度月均值变化基本一致,浓度变化均呈U形分布;PM_(10)和PM_(2.5)质量浓度变化具有明显的季节性特征,冬季其质量浓度最高,春季和秋季次之,夏季最低;各国控站点的PM_(2.5)、PM_(10)质量浓度同样显示冬季高,春、秋季次之,夏季低,大气污染状况整体呈西北高、东南低的分布特征;气象因子分析表明,ρ(PM_(2.5))、ρ(PM_(10))与温度均呈显著负相关;相对湿度与PM_(10)的质量浓度呈负相关,但与PM_(2.5)的质量浓度呈正相关,在相对湿度为60%~70%时,PM_(2.5)的质量浓度较大;PM_(2.5)、PM_(10)的质量浓度在风向为南风、东南偏南风、西南偏南风、西南偏西风时较小。2017—2019年洛阳市空气污染状况变化与地形、气象条件、城市化建设均有一定的关系。
Based on the mass concentration monitoring data of PM_(2.5) and PM_(10) from seven state-controlled air quality monitoring sta⁃tions in Luoyang city from 2017 to 2019,the temporal and spatial variation characteristics of atmospheric particulate concentration and the influence of meteorological factors on it in the urban area of Luoyang city were studied.The results showed that the overall situation of environmental air pollution in Luoyang city urban area from 2017 to 2019 showed a trend of first decreasing and then increasing.Among them,the overall situation of air quality in 2018 was the best,and the number of severely polluted days and above accounted for the lowest proportion of the effective days of the year;The number of polluted days decreased by 10 days compared with 2017,but increased by 31 days compared with 2018;The overall air quality situation of PM_(10) and PM_(2.5) concentration changes in monthly averages were basically the same,and the changes in concentration were in a U-shaped distribution;PM_(10) and PM_(2.5) the mass concentration changes had obvious seasonal characteristics.The mass concentration in winter was the highest,followed by spring and autumn,and the lowest in summer;The mass concentrations of PM_(2.5) and PM_(10) at the control sites in various countries also showed high in winter,followed by spring and autumn,and low in summer,the air pollution situation as a whole presented the distribution characteristics of high in northwest and low in southeast;Analysis of meteorological factors showed thatρ(PM_(2.5))andρ(PM_(10))were negatively correlated with temperature;Relative humidity was negatively correlated with the mass concentration of PM_(10),but it was positively correlated with the mass concentration of PM_(2.5).When the relative humidity was 60%~70%,the mass concentration of PM_(2.5) was greater;The mass concentration of PM_(2.5) and PM_(10) in the wind direction was southerly and southeast-southern,south-southwest wind and westsouthwest wind were smaller.The changes in air
作者
赵佳伦
周士锋
雷雅凯
冯艳
刘艺平
孔德政
ZHAO Jia-lun;ZHOU Shi-feng;LEI Ya-kai;FENG Yan;LIU Yi-ping;KONG De-zheng(College of Forestry,Henan Agricultural University,Zhengzhou 450002,China;Henan Vocational College of Agriculture,Zhengzhou 451450,China)
出处
《湖北农业科学》
2021年第20期35-42,共8页
Hubei Agricultural Sciences
基金
国家自然科学基金项目(31600579)
河南省科技攻关项目(202102110234)
河南农业大学科技创新基金项目(KJCX2017C01)。
