| 2008年奥运期间华北区域大气污染物本底浓度变化与分析 |
| 摘要点击 1888 全文点击 2139 投稿时间：2009-06-24 修订日期：2009-11-04 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 2008北京奥运 华北区域大气本底站 NOx SO2 O3 PM2.5 |
| 英文关键词 2008 Olympic Games regional background station of North China NOx SO2 O3 PM2.5 |
|
| 中文摘要 |
| 为了解华北区域的大气背景状况，评估污染源限排对区域空气质量的影响以及污染物输送在区域污染中的作用，在2008年奥运期间（6～11月）, 对华北区域兴隆大气本底监测站主要污染物NOx、SO2、O3和PM2.5进行了连续在线观测，对不同时间段的污染物的浓度水平和日变化特征进行了比较分析，结合地面气象资料和后向轨迹模式初步探讨了污染物的区域传输过程，并对区域不同站点的污染情况进行了初步比较. 结果显示，2008年夏季兴隆本底站 NOx、SO2、O3与PM2.5平均浓度分别为8.4、 10.5、 126.0和59.8μg·m-3，秋季平均浓度分别为11.7、 17.2、 97.5和30.7 μg·m-3. 奥运时段（2008-08-08～2008-08-24），兴隆NOx、SO2、O3和PM2.5平均浓度分别为6.6、 6.8、 100.5和33.3 μg·m-3，较奥运时段前后平均浓度分别降低了29.0%、 46.9%、 18.6%和36.5%，与2007年奥运时段同期观测结果相比，NOx浓度下降了62.5%，PM2.5浓度下降了29.0%, 奥运时段华北区域空气质量明显改善. 在污染物限排之前，兴隆主要污染物的日变化形势都是夜间浓度低，白天浓度不断升高，在傍晚17:00～20:00之间达到峰值，显示了污染物区域输送在兴隆的累积，而污染源排放控制期间污染物白天的积累过程明显减弱，区域输送的污染物含量降低，这些结果表明北京及周边地区污染源的联合控制取得了明显效果. 兴隆夏秋季节主要受偏南方向的季风影响，在此方向上对应的污染物浓度值最高，偏南方向上的区域污染输送对兴隆影响较大. 将京津冀区域不同站点间的污染物浓度进行比较分析发现，华北区域夏秋季NOx和SO2污染较轻，O3污染不容乐观，PM2.5污染严重，需要引起足够重视。 |
| 英文摘要 |
| To understand the atmospheric background in North China and evaluate the effect of pollutant emission control as well as the influence of contaminant transportation in the regional pollution, during the 2008 Olympic Games, concentrations of four main air pollutants were observed from June to November at Xinglong station which is the regional background station of North China. We compared the concentrations and diurnal variations in different periods, analyzed the pollution transportation using the ground meteorological data and the backward trajectory model and compared the concentrations between different observation stations in Northern China. The results indicated that the concentrations of NOx, SO2, O3 and PM2.5in summer were 8.4, 10.5, 126.0 and 59.8 μg·m-3 respectively and in autumn were 11.7, 17.2, 97.5 and 30.7 μg·m-3 respectively. During the period of Olympic (2008-08-08-2008-08-24), the concentrations of NOx, SO2, O3 and PM2.5 were 6.6, 6.8, 100.5 and 33.3μg·m-3 and reduced 29.0%, 46.9%, 18.6% and 36.5% respectively compared to the average concentrations of the period before and after Olympic Games. The concentration of NOxhas reduced 62.5% and the PM2.5has reduced 29.0% compared to the same term of Olympic in 2007. The air quality has obvious improvement in North China during the Olympic Games. Before the emission control, the concentrations of pollutants were lower in the night and became higher gradually in the daytime and reached the peak values in 17:00～20:00 which can indicate the accumulation of regional pollution transportation in Xinlong. In the emission control period, the accumulation of pollutants in afternoon was obviously weakened and the transportation of pollutants was lower which can reveal the obvious effect of the emission control in Beijing and peripheral areas. The atmosphere in Xinglong was mainly influenced by the monsoon from south direction in summer and autumn and the pollution of Xinglong was seriously influenced by the regional pollution in the south direction. Compared the concentrations between different stations, we can conclude that in summer and autumn the pollutions of NOxand SO2 are relatively lower, the pollution of O3 is not allowed to be optimism and the pollution of PM2.5is very serious which should be paid enough attentions to. |
|
|
|
