河北省两城市空气污染物与气象要素的典型相关分析

Canonical correlation analysis on air pollutants and meteorological elements in two cities of Hebei Province

目的探讨河北省两城市空气污染物与气象要素的相关关系。方法用典型相关分析法从夏半年、冬半年、全年3个时间段分析2015-2016年石家庄市、张家口市空气污染物与气象要素的相关关系。结果石家庄市、张家口市不同时间段的空气污染物与气象要素均值均有差异。典型相关分析结果显示:石家庄市主要空气污染物为PM_(10)、PM_(2.5)、NO_2、O_3、CO、SO_2,张家口市为PM_(10)、PM_(2.5)、NO_2、O_3、SO_2,温度、相对湿度、风速为影响两城市污染物浓度的主要因素。两城市O_3浓度与温度呈正相关;PM_(2.5)、NO_2浓度与相对湿度呈正相关,PM_(10)、O_3、CO、SO_2浓度与相对湿度呈负相关。石家庄市CO浓度与温度呈正相关;张家口市SO_2浓度与温度、NO_2浓度、风速呈负相关;石家庄市3个时间段、张家口市冬半年PM_(10)浓度与温度呈正相关,PM_(2.5)浓度与温度呈负相关;张家口市夏半年、全年PM_(10)浓度与温度呈负相关,PM_(2.5)浓度与温度呈正相关。结论空气污染物与气象要素存在显著相关性,温度、相对湿度、风速为影响污染物浓度的主要气象要素。

Objective To explore the correlation between air pollutants and meteorological elements in two cities of Hebei Province.MethodsThe relationship between air pollutants and meteorological elements in Shijiazhuang City and Zhangjiakou City from 2015 to 2016 was analyzed by typical correlation analysis method during summer,winter and year periods.ResultsThe average values of air pollutants and meteorological elements in different time periods in Shijiazhuang City and Zhangjiakou City were different.The main air pollutants were PM10,PM2.5,NO2,O3,CO,SO2in Shijiazhuang and PM10,PM2.5,NO2,O3,SO2in Zhangjiakou.In two cities,temperature,relative humidity and wind velocity were the main factors affecting the concentration of pollutants;the concentration of O3was positively correlated with the temperature;the concentrations of PM2.5and NO2were positively correlated with relative humidity;the concentrations of PM10,O3,CO,SO2were negatively correlated with the relative humidity.The concentration of CO was positively correlated with temperature in Shijiazhuang.The concentration of SO2was negatively correlated with temperature,NO2concentration and wind velocity in Zhangjiakou.During the three periods of Shijiazhuang City and the winter half year of Zhangjiakou City,the concentration of PM10was positively correlated with temperature,while the PM2.5concentration was negatively correlated with temperature.On the contrary,PM10is negatively correlated with temperature,and PM2.5was positively in summer and year periods in Zhangjiakou.Conclution Results of canonical correlation analysis showed that there is a significant correlation between air pollutants and meteorological elements.Temperature,relative humidity and wind velocity are the main meteorological factors affecting the concentration of pollutants.