差分吸收光谱测定北京市冬季大气中的CS_2

Measurement of CS_2 in Beijing winter atmosphere by different optical absorption spectroscopy

2006年2月17-23日在北京市丰台区,利用差分吸收光谱技术（DOAS）对大气中的CS2以及SO2、O3进行连续监测.结果表明,大气中CS2具有明显的日变化特征,日变化曲线存在明显的“双峰”结构,浓度峰值分别出现在早晨7：00-9：00和午夜00：00左右.测量期间CS2最大体积分数达到9.3×10^-9.CS2与SO2日变化趋势基本相同,二者存在较好的相关性.北京市CS2可能主要来源于冬季供暖燃煤、居民用煤和周边地区污染源的贡献.

A continuous monitoring of CS2, SO2 and 03 was performed using different optical absorption spectroscopy （DOAS） in Fengtai District of Beijing City from February 17th to 23rd in year 2006. CSz in atmosphere possessed obvious daily change character; the change curve existed obvious ＂two peaks＂. The concentration peak value appeared from 7：00 to 9：00 in the morning and about 00：00 in midnight. The maximal concentration of CS2 during measurement period was 9.3×10^-9V/V, being the same with the daily change tendency of SO2, these two changes existed relatively good correction. CS2 of Beijing City might be originated mainly from the distribution of the coal combustion in winter for heating, coal using of resident and the pollution source of surrounding area.