Measurement and profile inversion of atmospheric N2O absorption spectrum based on laser heterodyne detection

doi:10.7498/aps.70.20210710

	Measurement and profile inversion of atmospheric N2O absorption spectrum based on laser heterodyne detection
	Xue Zheng-Yue 1,2; Li Jun 1,2; Liu Xiao-Hai 1; Wang Jing-Jing 1; Xiao-Ming, Gao 1,2; Tan Tu 1
刊名	ACTA PHYSICA SINICA
	2021-11-05
卷号	70
关键词	laser heterodyne transmittance spectrum nitrous oxide (N2O) inversion calculation
ISSN号	1000-3290
DOI	10.7498/aps.70.20210710
通讯作者	Tan Tu(tantu@aiofm.ac.cn)
英文摘要	aser heterodyne spectroscopy detection has rapidly developed in recent years due to its high spectral resolution, small size, and light weight. It can be used to measure the atmospheric greenhouse gas vertical profile and calibrate the carbon satellite ground. This paper reports a laser heterodyne system for measuring atmospheric N2O, with a 3.939-mu m interband cascade laser used as a local oscillator light source. A homemade high-precision solar tracker collects sunlight as a laser heterodyne signal source. The tracking accuracy reaches 7 arcsec, and the spectral resolution of the laser heterodyne system arrives at 0.004 cm(-1). The atmospheric N2O absorption spectrum in Hefei area (31.902 degrees N, 117.167 degrees E) is measured, and two strong absorption peaks respectively at 288.336 and 2539.344 cm(-1) are obtained. In addition, the wavelength calibration of the absorption signal, and the entire atmospheric transmittance spectrum of N2O molecules are obtained, and the signal-to-noise ratio is 93. The high-resolution spectrum data are normalized and frequency is corrected, and the N2O atmospheric concentration profile is obtained by using the reference forward model and the optimal estimation algorithm. The standard deviation of volume fraction is in a range of 0.000031-0.0026 ppm, and the corresponding relative error range is 0.009%-0.83%. The research results show that the laser heterodyne system built in this work can be used to measure the absorption spectrum of N2O in the atmosphere and realize the inversion of the N2O profile, which provides a guarantee for long-term observation of atmospheric N2O concentration.
资助项目	Key Program of the National Natural Science Foundation of China[41730103] ; Young Scientists Fund of the National Natural Science Foundation of China[41805018] ; National Key Research and Development Program of China[2017YFC0209705]
WOS关键词	MIDINFRARED LASER ; RADIOMETER ; RETRIEVAL ; LHR ; CH4
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000716870500012
资助机构	Key Program of the National Natural Science Foundation of China ; Young Scientists Fund of the National Natural Science Foundation of China ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126632]
专题	中国科学院合肥物质科学研究院
通讯作者	Tan Tu
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Mat Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Xue Zheng-Yue,Li Jun,Liu Xiao-Hai,et al. Measurement and profile inversion of atmospheric N2O absorption spectrum based on laser heterodyne detection[J]. ACTA PHYSICA SINICA,2021,70.
APA	Xue Zheng-Yue,Li Jun,Liu Xiao-Hai,Wang Jing-Jing,Xiao-Ming, Gao,&Tan Tu.(2021).Measurement and profile inversion of atmospheric N2O absorption spectrum based on laser heterodyne detection.ACTA PHYSICA SINICA,70.
MLA	Xue Zheng-Yue,et al."Measurement and profile inversion of atmospheric N2O absorption spectrum based on laser heterodyne detection".ACTA PHYSICA SINICA 70(2021).