北京PM_(2.5)污染特征的分析

Analysis of Pollution Characteristics of PM_(2.5) in Beijing

对北京市2007年10月至2011年6月的大气PM2.5质量浓度进行了分析。结果表明:春季、冬季的PM2.5质量浓度高于夏季、秋季,其中2008年8～9月和2009年8月的浓度较低。气象条件(如沙尘暴)是造成春季PM2.5浓度高的主要原因,燃煤取暖是造成冬季浓度高的主要原因。对于环境空气质量标准(GB3095─2012)中的PM2.5标准值,若采取北京奥运期间的空气质量保障措施,则北京以及其他城市的PM2.5达标是可以实现的。

The mass concentration of PM2.5 from October 2007 to June 2011 in Beijing was analyzed. The results showed that the mass concentrations of PM2.5 in spring and winter were higher than those in summer and autumn, and lower mass concentration ap- peared from August to September of 2008 and in August of 2009. The meteorological condition （ such as sand dust storm） was the main reason for high PM2.5 mass concentration in spring, while the coal warming was the main reason for that in winter. As for the PM2.5 standard value in the ambient air quality standards （GB3095--2012）, the standard -reaching of PM2.5 in Beijing and other cities could be achieved by adopting the air quality safeguard measures in the Beijing Olympic Games period.