北京南郊观象台β射线法和TEOM法PM10质量浓度比对观测的相关分析  

Correlation Analysis of PM10 Mass Concentration Comparison Betweenβ-Ray Method and TEOM Method at Beijing Nanjiao Observatory

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)

机构地区：[1]北京城市气象研究院,北京100089 [2]北京市气象探测中心,北京100176 [3]京津冀环境气象预报预警中心,北京100089

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)。

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.

关 键 词：气溶胶 质量浓度 PM10 观测方法 相关分析 

分 类 号：X513[环境科学与工程—环境工程]