北京大气中SO_2、NO_x、CO和O_3体积分数变化分析  

Measurement on the Atmospheric SO_2, NO_x, CO and O_3 concentrations in Beijing

作　　者：安俊琳[1] 王跃思[2] 李昕[2] 漏嗣佳[1] 银燕[1] 申双和[1] 

机构地区：[1]南京信息工程大学应用气象学系,江苏南京210044 [2]中国科学院大气物理研究所,北京100029

出　　处：《生态环境》2007年第6期1585-1589,共5页Ecology and Environmnet

基　　金：国家杰出青年科学基金项目(40525016);江苏省自然科学基金项目(BK2006226)

摘　　要：为了探讨北京市大气污染物的污染水平和变化特征,2004年8月—2005年7月对北京大气中SO2、NOx、O3和CO体积分数进行了连续观测,并对比分析不同季节的变化特征。结果表明,SO2体积分数呈双峰曲线日变化,在08:00和23:00出现峰值。SO2采暖季日振幅明显高于非采暖季日振幅,采暖季SO2体积分数要比非采暖季高出3倍以上。NOx、CO体积分数在早晨07:00和傍晚20:00左右出现峰值,NOx体积分数最大值可达130×10-9,而CO体积分数最大值可达3300×10-9。NO有明显的日变化和季节变化,而NO2白天夜晚都维持在同一水平,且季节变化也不大。O3体积分数夏季远远高于冬季,日变化均呈单峰型分布,午后14:00—15:00出现峰值。The purpose of this study is to investigate the atmospheric pollution and its variation characteristics in Beijing, China. Continuous monitoring in the urban area from August 2004 to July 2005 was carried out. The characteristics of concentrations of air pollutants （SO2, NOx, O3 and CO） were analyzed, comparing the variation in different seasons. The results showed that diurnal variation of SO2 concentrations shows a very clear cycle with two peaks, one appears at about 07：00 in the morning and the other is at 23：00 in the evening. The magnitude of concentration of SO2 is obviously higher during the heating period than during the period without heating. The concentration of SO2 during the heating period is over three times as high as the one during the period without heating. The concentrations of NOx and CO appear peaks in the morning and evening respectively. The highest concentrations of NOx, and CO are about 130×10^-9 and 3 300×10^-9 volume ratio respectively. The diurnal and seasonal variations of the concentrations of NO are obvious, however the variations of NO2 concentrations are not pronounced. The concentration of O3 is higher in summer than in winter, and the diurnal variations show one peak often appear at about 14：00-15：00 in the early afternoon.

关 键 词：大气污染 采暖季 非采暖季 

分 类 号：X511[环境科学与工程—环境工程]