【摘要】 目的探讨深圳市大气PM_2.5污染状况及其可能的影响因素。方法基于2016年深圳市空气质量监测数据和气象资料,分析PM_2.5质量浓度变化特征,探讨PM_2.5与其他气体污染物以及气象因子之间的相关性及影响规律,利用气象数据和气体污染物构建多重线性回归模型,进行深圳大气PM_2.5浓度影响因素分析。结果2016年深圳市大气PM_2.5平均质量浓度为（27.02±13.88）μg/m³,PM_2.5/PM₁₀浓度比为0.62±0.08。PM_2.5与NO₂、SO₂、CO和O₃均表现出显著的正相关关系（P<0.05）。PM_2.5与气温和相对湿度呈负相关关系（P<0.05）,与大气压呈正相关关系（P<0.05）。经多重线性回归建模发现,NO₂、SO₂、CO、O₃和大气压能够解释大气PM_2.5浓度86.7%的变异,模型中自变量CO的标准回归系数最高（0.439）。结论2016年深圳市大气PM_2.5污染较轻,大气PM_2.5是可吸入颗粒物的主要组成部分。气压和大气中其他污染物是PM_2.5浓度的主要影响因素,其中CO是影响深圳市大气PM_2.5浓度的首要显著因子。更多还原

【Abstract】 Objective To explore the pollution characteristics and possible influence factors of PM_2.5in Shenzhen in 2016.Methods The dynamic characters of PM_2.5mass concentration were analyzed using air quality monitoring and meteorology observation data.The correlations between PM_2.5and other affecting factors,e.g.gas pollutions and meteorology factors,were discussed.A multiple linear regression model was built to reveal the impacts of those factors on PM_2.5concentrations in Shenzhen City using the air quality monitoring and meteorology observation data.Results The mass concentration of PM_2.5was（27.02±13.88）μg/m³,and the ratios of PM_2.5/PM₁₀was（0.62±0.08）in Shenzhen City.Significant positive correlations existed between PM_2.5concentration and main airpollutants（NO₂,SO₂,CO and O₃）（P<0.05）.A significant negative correlation existed between PM_2.5 concentration and temperature,relative humidity（P<0.05）,and also a significant positive correlation between atmospheric pressure and PM_2.5concentration.The multiple linear regression showed that air pollutants（NO₂,SO₂,CO,and O₃）and atmospheric pressure could explain 86.7% of the variations of PM_2.5concentration.The standard regression coefficient of CO in the model was the highest（0.439）.Conclusion PM_2.5pollution was relatively light in Shenzhen City,and PM_2.5was the main component of inhalable particulate matter.Atmospheric pressure and other pollutants in the atmosphere were the main influencing factors of PM_2.5concentration,and CO was the major contributor to PM_2.5concentration rising in Shenzhen City.更多还原