近年来广州市氮氧化物变化趋势分析  

Trend Analysis of Nitrogen Oxides in Recent Years in Guangzhou

作　　者：陈瑜 于涛 

机构地区：[1]广州市环境监测中心站,广东广州510030

出　　处：《环境科学与管理》2010年第2期47-48,61,共3页Environmental Science and Management

基　　金：国家"十五"科技攻关计划项目(2003BA614A)"重大环境问题对策与关键支撑技术研究"中第五课题(2003BA614A-05)"区域大气污染物总量控制技术与示范研究"的"城市氮氧化物控制战略研究"专题的论文

摘　　要：氮氧化物是生成臭氧光化学反应的主要前体物,氮氧化物可以经过一系列的光化学反应生成硝酸盐气溶胶,导致城市能见度下降,出现灰霾现象。氮氧化物也是造成酸雨污染的主要物质。广州作为珠江三角洲的中心城市,近年来氮氧化物的污染不容忽视。本文以2003年-2008年监测数据为基础,对广州市氮氧化物浓度的日变化、月际变化、年际变化作了详尽的分析。结果表明,广州市氮氧化物浓度近年来呈现下降趋势;氮氧化物的月际变化呈明显的季节特征,冬季污染较严重,夏季污染较轻。Nitrogen oxides are the main ozone precursors leading to photochemical reaction. Nitrogen oxides can be generated through a series of photochemical reaction of nitrate aerosols and can reduce visibility in cities, bringing about haze. Nitrogen oxides are also the main substances which can cause acid rain pollution. Nitrogen oxides pollution in Guangzhou, the center of the Pearl River Delta, in recent years can not be ignored. In this paper the concentrations of nitrogen oxides measured from 2003 to 2008 in Guangzhou were discussed. Daily, monthly and annual variations of NOx were described in detail. These annual mean concentrations of nitrogen oxides in Guangzhou decreased in recent years ; the monthly means showed characteristic seasonal variation, meaning that the pollution of NOx was high in winter but low in summer.

关 键 词：氮氧化物 污染特征 趋势分析 

分 类 号：X511[环境科学与工程—环境工程]