摘要
利用北京南郊观象台2016年3月1日2017年2月28日β射线法与TEOM法观测的PM10质量浓度观测数据,通过t检验、线性回归和相关分析等方法对两种方法观测的小时、日、周、月、季等数据进行相关性分析。结果表明:两种方法观测的PM10小时平均质量浓度总体的线性回归方程相关系数R^2为0.870;在低浓度范围(PM10<50μg·m^-3)时二者为微弱相关(R^2=0.073);中等浓度范围(50μg·m^-3≤PM10<350μg·m^-3)时二者为低度相关(R^2为0.257~0.346);高浓度范围(PM10≥350μg·m^-3)时二者为高度相关(R^2=0.686)。二者日平均PM10质量浓度数据总体的R^2为0.929;二者PM10质量浓度小时数据周相关系数为0.598~0.980。二者月平均PM10质量浓度数据间的相关系数为0.628~0.976;二者季节的R^2为0.627~0.944,呈现冬季的>秋季的>春季的>夏季的。由此可发现,两种观测方法观测的PM10质量浓度的结果总体呈显著性的线性相关关系,且浓度越高,相关性越强。
Based on PM10 mass concentration data observed byβ-ray method and TEOM method from 1st March 2016 to 28th February 2017 at Beijing Nanjiao Observatory,correlations of hourly,daily,weekly,monthly and seasonal data by these two methods were analyzed through the t test,linear regression and correlation analysis method.The results showed that the linear regression equations for the hourly average data of PM10 mass concentration by the two methods have correlation coefficient(R^2)of 0.870.When PM10 mass concentration is lower than 50μg·m^-3(PM10<50μg·m^-3),the correlation is weak(R^2=0.073);when PM10 mass concentration is in moderate range(50μg·m^-3≤PM10<350μg·m^-3),the correlation is at a lower rate with R^2 value between 0.257 and 0.346;and when PM10 mass concentration is in a higher range(PM10≥350μg·m^-3),they are highly correlated(R^2=0.686).Moreover,the overall R^2=0.929 is for the daily average PM10 mass concentration data,the weekly correlation coefficient R^2 of the hourly PM10 mass concentration is 0.5980.980,the R^2 of the monthly average PM10 mass concentration data is 0.6280.976,and 0.6270.944 is for the R^2 of seasonal average data,respectively.Obviously,the R^2 sorts from small to large in the order of winter>autumn>spring>summer.Therefore,it can be concluded that the mass concentrations of PM10 measured with the two methods have notable linear correlations in general.The higher the concentration,the stronger the correlation.
作者
于丽萍
王得来
刘旭林
韦涛
李林
王垚
孟磊
刘金城
李栋
乔晓燕
Yu Liping;Wang Delai;Liu Xulin;Wei Tao;Li Lin;Wang Yao;Meng Lei;Liu Jincheng;Li Dong;Qiao Xiaoyan(Beijing Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089,China;Beijing Meteorological Observation Center,Beijing 100176,China;Beijing-Tianjin-Hebei Forecasting and Early Warning Center for Environmental Meteorology,Beijing 100089,China)
出处
《气象与环境科学》
2020年第2期41-49,共9页
Meteorological and Environmental Sciences
基金
国家重点研发计划(2016YFA0600303)
公益性行业(气象)科研专项(GYHY201206037)
中国气象局气象关键技术集成与应用项目(CMAGJ2013Z14)
中央级公益性科研院所基金项目(IUMKY201736)。
关键词
气溶胶
质量浓度
PM10
观测方法
相关分析
aerosol
mass concentration
PM10
observation method
correlation analysis
