重庆市主城环境空气中二氧化氮污染浅析  

Analysis on the Pollution of Nitrogen Dioxide in Chongqing Urban Area

作　　者：刘姣姣[1,2] 宋丹[1,2] 刘兰玉[1,2] 李灵[1,2] 

机构地区：[1]重庆市环境监测中心,重庆401147 [2]城市大气环境综合观测与污染防控重庆市重点实验室,重庆401147

出　　处：《四川环境》2014年第5期82-85,共4页Sichuan Environment

基　　金：环保公益性行业科研专项经费资助(201009001)

摘　　要：利用重庆市主城区2009年～ 2013年二氧化氮监测数据,对重庆市二氧化氮浓度时空变化趋势进行分析.结果表明：近5年二氧化氮浓度总体呈上升趋势,空间分布呈交通干线和城市中心区域二氧化氮浓度相对偏高的分布特征;日变化出现“双峰双谷”分布,峰值分别出现在中午11时左右和夜间21时左右,“双谷”分别出现在凌晨6时和下午16时左右;二氧化氮变化显示出受到交通源排放、边界层气象条件及臭氧大气光化学反应过程的影响,影响程度与道路交通相对空间位置、拥堵程度等相关联.Based on the monitoring data of nitrogen dioxide in 2009-2013 in Chongqing urban area,the spatial and temporal variation of nitrogen dioxide concentration was analyzed.Results showed that the nitrogen dioxide concentration presented the increasing tendency in recent five years.The concentration was relatively higher in the main road and urban central areas.The daily variation of nitrogen dioxide showed a ＂ double peak valley＂ distribution with two peaks and two valleys.The peak concentration appeared at about 11：00 am and at 23：00 pm respectively.And the valleys appeared at 6：00 am and at 16：00 pm.The concentration was affected by traffic emission,boundary layer meteorological conditions and photochemical reaction process of ozone.The influenee degree was related to relative spatial position of road traffic and the degree of congestion.

关 键 词：二氧化氮 空气污染 时空变化 

分 类 号：X515[环境科学与工程—环境工程]