多次反射池FTIR光谱法的臭氧浓度反演及其相关性分析

Ozone Concentration Inversion Based on Multi-Reflected Cell FTIR Spectra and Correlation Analysis

同温层臭氧对人类起保护作用,地面臭氧对人类健康是有害的,能够对它进行多途径多方法监测对于了解臭氧分布和变换规律以及控制污染排放有积极作用。文章利用多次反射式怀特池傅里叶变换红外光谱仪测得傅里叶变换红外光谱,使用非线性最小二乘算法对它们进行反演,准确得到了臭氧浓度。将测得的臭氧浓度结果与开放光路紫外差分光谱仪以及热电公司的臭氧分析仪所测量的臭氧浓度时间序列进行了相关性分析,结果表明不同监测方法和仪器观测到的臭氧绝对浓度值有一定差别,但是浓度日变化规律一致,相关性较高。因此,国内未见报道的基于多次反射池傅里叶变换红外光谱法的臭氧浓度反演方法,可以作为一种有效的臭氧浓度测量方法。

The stratosphere ozone plays the protective action role for human and the ground-level ozone is harmful to human health.Monitoring ozone with different ways and methods took an active part in understanding distribution and transformation of ozone,which was useful to controlling pollution emission.Spectra were got by multi-reflected white cell Fourier transform infrared（FTIR） spectrometer,inversed with nonlinear least squares（NLLSQ） method and then the concentrations of ozone were got exactly.The correlations of measured ozone concentration time series by Fourier transform infrared spectrometer,open path UV differential optical absorption spectrometer and ozone analyzer of the Thermo Corporation were significant.The results showed that the measured ozone absolute concentrations with different monitoring methods and instruments had some differences,but the concentration diurnal variations were coincident and the correlations were good.Therefore,ozone concentration inversion method,based on multi-reflected cell Fourier transform infrared spectrum and not reported in domestic articles,could be used as an effective technique to measure ozone concentration.