摘要
介绍了一套自行研制的开放光程傅里叶变换红外光谱系统,该系统具有250 m的有效光程。利用HITRAN数据库中的辐射线强等参数建立了用于浓度反演的标准吸收截面。使用该系统对北京地区大气的NH3进行了连续观测,并对测量结果进行了分析。研究结果表明,北京地区大气具有较高的NH3浓度,且具有比较明显的日变化周期特征,体现出白天高、夜间低的变化特征。
A long path Fourier transform infrared spectroscopy system with a 250-meter effective open optical length is described. A radiation line strength database, HITRAN, is used to calculate the standard absorption cross-section. Ambient level of NH3 in Beijing was measured with the system. Results show that the atmospheric NH3 concentration in the urban area of Beijing is high, and has a clear diurnal variation cycle. The general characteristics of diurnal variation value are low in the daytime and high at night.
出处
《大气与环境光学学报》
CAS
2007年第1期60-63,共4页
Journal of Atmospheric and Environmental Optics
基金
国家"863"计划资助项目(2005AA641010)
国家自然科学基金资助项目(10274080)
关键词
大气环境科学
傅里叶变换红外光谱
开放光程
NH3
amospheric environmental science
Fourier transform infrared spectroscopy
open path
NH3
