北京周边地区主要微量气体的基本特征

Basic Characteristics of Main Trace Gases in the Surrounding Area of Beijing

2005年5月22日—2006年6月30日,在中国科学院大气本底观测网兴隆站开展了对微量气体成分的连续观测,获得了O3、NOx、CO2、SO2等气体组分浓度、变化特征和变化规律。一年多的观测期间,O3在6月、9月出现高值,12月为最低值;NOx最低值出现在8月份,8～11月期间表现为缓慢的增长,NO在NOx中所占比例非常小;SO2最低值出现在7月,之后逐渐增加;CO2最低值出现在8月份。兴隆站7月、8月份的空气质量为一年中的最佳时段。

During 22 May, 2005 to 30 June, 2006, continuous measurements of some trace gases at Xionglong station, atmospheric background observation network of Chinese Academy of Sciences were carried out. The concentrations and variation characteristics and variation regularity of 03 ,NOx ,CO2 ,S02, were obtained. In general, 03 displayed higher concentration in June and September, and the lowest concentration in December. NOx indicated the lowest concentration in August, and slow increase from August to November, the ratio of NO to NOx was very low. SO2 showed the lowest concentration in July, and an increasing trend after July. CO2 exhibited the lowest concentration in August. Best air quality at Xinglong station was in July and August during May, 2005 to June, 2006.