Quantitative analysis of accuracy of concentration inversion under different temperature and pressure

doi:10.7498/aps.70.20201672

	Quantitative analysis of accuracy of concentration inversion under different temperature and pressure
	Wang Yu-Hao 2,3; Liu Jian-Guo 2,3; Xu Liang 3; Liu Wen-Qing 2,3; Song Qing-li 1; Jin Ling 3; Xu Han-Yang 3
刊名	ACTA PHYSICA SINICA
	2021-04-05
卷号	70
关键词	The FTIR greenhouse gases temperature pressure
ISSN号	1000-3290
DOI	10.7498/aps.70.20201672
通讯作者	Xu Liang(xuliang@aiofm.ac.cn)
英文摘要	The CO2, CH4 and other greenhouse gases are measured by using a home-made Fourier transform infrared spectrometer at the Longfengshan atmospheric background station. Compared with the measurement results of the instrument from the background station which meets the standards of the World Meteorological Organization, the correlation coefficient and the root mean square error of the CO2 concentration value are 0.9576 and 18.6015, so the measurement results from the home-made instrument are reliable. In the home-made instrument the calibration spectrum of standard temperature and the calibration spectrum of stand pressure are used to invert the concentration. With the temperature changing, the temperature of the measured gas will vary, thus resulting in error. The research of environmental variable factors can improve the accuracy of concentration inversion. For example, compared with CO2 absorption spectrum under 296 K, the CO2 absorption spectrum under 297 K will have 1.8% spectrum deviation and its inversion concentration error is 0.41%. This is the main cause of inversion concentration error. Based on the above analysis, the absorption cross section is calculated by using the high-resolution transmission molecular absorption database parameters. Combining with the instrument line shape, the calibration spectra at different temperatures and pressures can be obtained. The calibration spectra at different temperatures and pressures are used to calibrate the concentration inversion. After calibration, compared with the measurement results of the background station instrument, the correlation coefficient and the root mean square error of the CO2 concentration value are 0.9637 and 6.7803. The correlation coefficient of CO2 concentration value measured by self-developed instrument is improved and root mean square error is reduced. The result shows that the calibration algorithm enhances the accuracy of the measurement results to a certain extent. The above results illustrate the reliability of the homemade FTIR instrument and this experiment provides important data, which lay the foundation for studying the home-made Fourier transform infrared spectrometer. Of course, improvement can be made in the following areas. Other minor factors may affect the effect of the inversion algorithm. The concentration inversion will have subtle differences at different bands of calibration spectra. So in order to improve the measurement accuracy, we need to choice more reasonable band inversion and more precise parameters from the high-resolution transmission molecular absorption database.
资助项目	National Natural Science Foundation of China[41941011] ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences[QYZDY-SSW-DQC016] ; National Key R&D Program of China[2016YFC0201002] ; National Key R&D Program of China[2016YFC0803001-08] ; Key RD Program of Anhui Province, China[1804d08020300]
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000637968800010
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; National Key R&D Program of China ; Key RD Program of Anhui Province, China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121681]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu Liang
作者单位	1.Natl Field Sci Observat & Res Stn Atmospher Compo, Harbin 150209, Heilongjiang, Peoples R China 2.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Key Lab Environm Opt & Technol, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wang Yu-Hao,Liu Jian-Guo,Xu Liang,et al. Quantitative analysis of accuracy of concentration inversion under different temperature and pressure[J]. ACTA PHYSICA SINICA,2021,70.
APA	Wang Yu-Hao.,Liu Jian-Guo.,Xu Liang.,Liu Wen-Qing.,Song Qing-li.,...&Xu Han-Yang.(2021).Quantitative analysis of accuracy of concentration inversion under different temperature and pressure.ACTA PHYSICA SINICA,70.
MLA	Wang Yu-Hao,et al."Quantitative analysis of accuracy of concentration inversion under different temperature and pressure".ACTA PHYSICA SINICA 70(2021).