差分吸收光谱技术在大气监测领域中的应用

随着人类经济的高速发展,环境污染和生态破坏日益严重,突发性环境污染事件也时有发生。如何防治污染、保护环境,成为当代科学的一个课题。痕量气体光谱分析技术检测大气污染具有检测范围广、速度快、成本低,且便于进行长期的动态检测等优势。差分光学吸收光谱技术(DOAS)是探测大气中痕量气体成分的现代光谱遥测技术。由于其高准确性和高分辨率、可同时对多种气体进行测量等优点被广泛用于城市空气质量、污染源排放(如:高速公路、企业排放)、对流层和平流层的大气痕量气体成分及自由基的测量。它可以同时测量大气中多种气体分子,如CO2、SO2、NOx等。本文介绍了主要介绍差分吸收光谱技术的原理、测量精度影响因素及其在大气监测领域中的应用。

Differential Optical Absorption Spectroscopy and Its Application in Atmosphere Monitor

With the rapid development of the economic,pollution and ecological destruction is becoming increasingly serious,pollution incidents have also suddenly occurred.How to prevent and control pollution and protect the environment,become a topic of modern science.Trace gas spectral analysis to detect air pollution has a wide detection range,which is high speed,low cost,easy to carry-out and long-term dynamic detection and etc.Differential optical absorption spectroscopy(DOAS) to detect the composition of trace gases in the atmosphere of modern spectral remote sensing technology.Because of its high accuracy and high resolution,a wide range of gas measurement and advantages are widely used in urban air quality,pollutant emissions(such as: highways,corporate emissions),tropospheric and stratospheric atmospheric trace gas composition and measurement of free radicals.It can simultaneously measure a variety of gas molecules in the atmosphere,such as CO2、SO2、NOx.This article introduces the basics of differential optical absorption spectroscopy and its measurement influence factor its application in the field of atmospheric monitoring.