摘要
【目的】了解衡阳市PM_(2.5)的时空分布特征及影响因素,为衡阳市科学防控PM_(2.5)污染提供理论依据。【方法】采用Pearson相关性分析,探究衡阳市PM_(2.5)与气象因素、社会经济因素及其他污染因子之间的相关关系。【结果】衡阳市PM_(2.5)浓度中心城区高于其他县市区,每年12月至次年1月出现浓度高峰;衡阳市PM_(2.5)浓度与平均气压、平均气温、日照时数、平均风速和降水量均有显著相关关系,相关度依次为0.874、-0.841、-0.547、-0.546和-0.338,与平均湿度相关关系不明显;社会经济因素与衡阳市PM_(2.5)浓度的相关关系不明显;衡阳市中心城区PM_(2.5)浓度与PM_(10)、CO、NO_(2)、SO_(2)和O_(3)浓度均有显著相关关系,相关度依次为0.953、0.873、0.861、0.774和-0.565。【结论】在防控衡阳市PM_(2.5)污染时,应当结合时空分布特征、气象条件等合理制定防控措施,并与其他污染物联防联控。
【Objective】In order to understand the characteristics of spatio-temporal distribution and influencing factors of PM_(2.5)in Hengyang,and provide a theoretical basis for scientific prevention and control of PM_(2.5)pollution.【Method】Pearson correlation analysis was used,the correlation between PM_(2.5) and meteorological factors,socio-economic factors and other pollution factors in Hengyang was explored.【Results】The concentration of PM_(2.5) in centre Hengyang was higher than other counties,the peak concen-tration appears from December to January of the next year.There was a significant correlation between the concentration of PM_(2.5) and mean air pressure,mean temperature,sunshine duration,mean wind speed and precipitation in Hengyang,the correlativity is 0.874,-0.841,-0.547,-0.546 and-0.338 respectively,there was no significant correlation with the average humidity.There was no significant correlation be-tween socio-economic factors and the concentration of PM_(2.5) in Hengyang.There was a significant correla-tion between the concentration of PM_(2.5) and PM_(10),CO,NO_(2),SO_(2) and O_(3) in centre Hengyang,the correlativity is 0.953,0.873,0.861,0.774 and-0.565 respectively.【Conclusion】In the prevention and control of PM_(2.5) pollution in Hengyang,the measures of prevention and control should be reasonably formulated in combi-nation with its characteristics of spatio-temporal distribution and meteorological conditions,and joint pre-vention and control with other pollutants.
作者
刘作云
刘衡林
LIU Zuoyun;LIU Henglin(Ecological livable College of Hunan Polytechnic of Environment and Biology,Hengyang 421005,China;Hunan Provincial Hengyang Ecological and Environmental Monitoring Center,Hengyang 421001,China)
出处
《湖南生态科学学报》
2021年第3期69-75,共7页
Journal of Hunan Ecological Science
基金
湖南省自然科学基金项目(2018JJ5028)。
关键词
PM_(2.5)
时空分布
气象因素
社会经济因素
相关性
PM_(2.5)
spatio-temporal distribution
meteorological factors
socio-economic factors
cor-relation
