2004～2009年深圳空气质量及其污染物扩散条件分析

利用2004～2009年深圳市空气监测网络的监测结果,对深圳地区近6年空气质量及污染物浓度进行了统计分析,并利用2005～2008年深圳常规地面气象观测资料对污染物扩散条件及其成因机理进行了研究。同时对2008年12月15日到2008年12月20日深圳空气污染系数连续偏高的现象进行了特征分析。分析研究表明:深圳近6年首要污染物为可吸入颗粒物,次要污染物为NO2;南山、宝安空气质量较其它区域差;深圳大气污染物的扩散与温度、降水量呈正相关,与气压、静风频次呈显著的负相关,而与日照相关性相对较小;2004～2009年深圳空气质量状况总的来说良好,环境空气污染指数(API)值呈下降趋势。

Analyse of air quality and diffusive conditions of contaminant in Shenzhen from 2004 to 2009

The quality and contaminant concentration of the air in Shenzhen area from 2004 to 2009 was analyzed,based on the records of air monitoring in this period.The formation mechanism of the contaminant based on the meteorological observation data from 2005 to 2008 was investigated,too.Our results indicated that the main contaminant in Shenzhen was particulate matter,and followed by NO2 in the past 6 years.The air quality in Nanshan and Baoan districts was worse than the others of Shenzhen.The air contaminant diffusion had positive correlation to temperature,precipitation and Negative correlation with air pressure,static wind frequency,and had less relation with sunshine time.Generally,the air quality of Shenzhen was good from 2004 to 2009,and air pollution index(API) stepped down during this period.