便携式傅里叶变换红外光谱仪在大气温室气体观测中的应用进展

大气温室气体柱浓度地基遥感观测是碳监测卫星验证和校正的有效手段,目前主要依赖于昂贵且移动困难的高分辨率傅里叶变换红外光谱仪(120/125 HR).采用便携式较低光谱分辨率(0.5cm-1)傅里叶变换红外光谱仪(EM27/SUN)进行温室气体柱浓度的监测提供了一种新型的便捷手段.EM27/SUN通过自带的太阳跟踪器记录...

Review of Atmospheric Greenhouse Gas Observation and Application based on Portable Fourier Transform Infrared Spectrometer

Ground-based remote sensing observation of Atmospheric greenhouse gas （GHG） column concentration has been taken great effort to support and validate satellite data . The high-resolution IFS 120/125 HR owns outstanding capabilities in its precision， but it is expansive and poor in transportability. The portable low resolution （0.5 cm^-1） Fourier infrared spectrometer EM27/SUN records the direct solar absorption spectra through its own solar tracker， which is a new method to provide GHG monitoring where TCCON stations are sparse. Based on the principle that GHG have obvious absorption lines in the short-wave infrared region， the non-linear least squares algorithm PROFFIT and GGG are widely used to retrieve the column gas average dry air mole fraction （X_gas） from the recorded spectrum. EM27/SUN data has high accuracy and stability， which is suitable for scientific application. The international applications of EM27/Sun are mainly summarized into three categories： remote sensing of the gaseous composition of plumes， satellite validation and gas emission estimation on the city scale. The unique advantages and innovative results of EM27/SUN compared with other observation methods are discussed. It is proposed that the protable EM27/SUN may help quantifying the gas components of plumes， validating satellite data from home and abroad， source distribution estimation in urban areas and quantizing station-to-station variability of different TCCON sites by using this travelling spectrometer.