【摘要】 目的探讨贵阳市大气PM_2.5质量浓度分布及其与气象因素的关系。方法从贵阳市环保局、气象局收集2015年1月1日—12月31日的大气PM_2.5监测资料及气象因素监测资料;采用Pearson相关性分析对大气PM_2.5与气象因素间的关系进行分析。结果 2015年贵阳市大气PM_2.5年均质量浓度为37.8μg/m³;贵阳市大气PM_2.5年均质量浓度达到《环境空气质量指数（AQI）技术规定（HJ 633-2012）》一级标准天数为182 d,达到《环境空气质量指数（AQI）技术规定（HJ 633-2012）》二级标准天数为160 d;PM_2.5与气压呈正相关（r=0.342,P<0.01）,PM_2.5与相对湿度呈负相关（r=-0.330,P<0.01）,PM_2.5与温度呈负相关（r=-0.390,P<0.01）,PM_2.5与降水量呈负相关（r=-0.259,P<0.01）,PM_2.5与风速呈负相关（r=-0.148,P<0.01）;PM_2.5与日均日照呈正相关,差异无统计学意义。结论贵阳市2015年PM_2.5年均质量浓度为37.8μg/m³,达到国家环境《环境空气质量指数（AQI）技术规定（HJ 633-2012）》二级标准;贵阳市大气PM_2.5质量浓度与气压呈正相关,与相对湿度、温度、降水量、风速呈负相关,与日照不相关。更多还原

【Abstract】 [Objective]To study the relationship between atmospheric PM_2.5 concentration distribution and meteorological factors in Guiyang City. [Methods]The monitoring data of atmospheric PM_2.5 and meteorological factors from January 1 to December 31 of 2015 were collected from Guiyang City Environmental Protection Bureau and Guiyang City Meteorological Bureau. Pearson correlation analysis was used to investigate the relationship between atmospheric PM_2.5 and meteorological factors.[Results] The annual atmospheric PM_2.5 concentration was 37.8 μg/m³ in Guiyang City in 2015. There were respectively 182 days and 160 days which the atmospheric PM_2.5 concentration met the one-level and two-level of the Ambient air quality index（AQI） technical regulations（HJ 633-2012）. The atmospheric PM_2.5concentration was positively correlated with atmospheric pressure（r=0.342,P<0.01）,and it was negatively correlated with relative humidity（r=-0.330,P<0.01）,temperature（r=-0.390,P<0.01）,precipitation（r=-0.259,P<0.01）,wind speed（r=-0.148,P<0.01）. The atmospheric PM_2.5concentration was positively correlated with daily sunlight,but the difference was not statistically significant. [Conclusion]The annual atmospheric PM_2.5 concentration is 37.8 μg/m³ in Guiyang City in 2015,which has reached two-level of the Ambient air quality index（AQI）technical regulations（HJ 633-2012）. In Guiyang City,the atmospheric PM_2.5 concentration is positively correlated with atmospheric pressure,and it is negatively correlated with relative humidity,temperature,precipitation and wind speed,while there is no correlation between atmospheric PM_2.5 concentration and sunlight.更多还原