Evaluation of systematic errors for the continuous-wave NO2 differential absorption lidar employing a multimode laser diode

doi:10.1364/AO.403659

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海工程技术部 > 深海资源开发研究室

	Evaluation of systematic errors for the continuous-wave NO2 differential absorption lidar employing a multimode laser diode
	Cheng, Yuan 2; Zhang, Zhen 2; Kong, Zheng 2; Yang, Chenguang 1; Gong, Zhenfeng 2; Liu, Kun 2; Mei, Liang 2
刊名	APPLIED OPTICS
	2020-10-10
卷号	59 期号:29 页码:9087-9097
ISSN号	1559-128X
DOI	10.1364/AO.403659
英文摘要	The NO2-differential absorption lidar (NO2-DIAL) technique has been of great interest for atmospheric NO2 profiling. Comprehensive studies on measurement errors in the NO2-DIAL technique are vital for the accurate retrieval of the NO2 concentration. This work investigates the systematic errors of the recently developed continuous-wave (CW) NO2-DIAL technique based on the Scheimpflug principle and a high-power CW multimode laser diode. Systematic errors introduced by various factors, e.g., uncertainty of the NO2 differential absorption cross-section, differential absorption due to other gases, spectral drifting of the lambda(on) and lambda(off) wavelengths, wavelength-dependent extinction and backscattering effect, have been theoretically and experimentally studied for the CW-DIAL technique. By performing real-time spectral monitoring on the emission spectrum of the laser diode, the effect of spectral drifting on the NO2 differential absorption cross-section is negligible. The temperature-dependent NO2 absorption cross-section in the region of 220-294 K can be interpolated by employing a linear fitting method based on high-precision absorption spectra at 220, 240, and 294 K. The relative error for the retrieval of the NO2 concentration is estimated to be less than 0.34% when employing the interpolated spectrum. The primary interference molecule is found to be the glyoxal (CHOCHO), which should be carefully evaluated according to its relative concentration in respect to NO2. The systematic error introduced by the backscattering effect is subjected to the spatial variation of the aerosol load, while the extinction-induced systematic error is primarily determined by the difference between the aerosol extinction coefficients at lambda(on) and lambda(off) wavelengths. A case study has been carried out to demonstrate the evaluation of systematic errors for practical NO2 monitoring. The comprehensive investigation on systematic errors in this work can be of great value for future NO2 monitoring using the DIAL technique. (C) 2020 Optical Society of America
资助项目	National Natural Science Foundation of China[61705030] ; National Natural Science Foundation of China[62075025]
WOS关键词	TROPOSPHERIC NO2 ; CROSS-SECTIONS ; ATMOSPHERIC NO2 ; TEMPERATURE ; DOAS ; SPECTROSCOPY ; NM ; MODULATION ; DEPENDENCE ; RETRIEVAL
WOS研究方向	Optics
语种	英语
出版者	OPTICAL SOC AMER
WOS记录号	WOS:000580652100003
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/7960]
专题	深海工程技术部_深海资源开发研究室
通讯作者	Mei, Liang
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 2.Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Yuan,Zhang, Zhen,Kong, Zheng,et al. Evaluation of systematic errors for the continuous-wave NO2 differential absorption lidar employing a multimode laser diode[J]. APPLIED OPTICS,2020,59(29):9087-9097.
APA	Cheng, Yuan.,Zhang, Zhen.,Kong, Zheng.,Yang, Chenguang.,Gong, Zhenfeng.,...&Mei, Liang.(2020).Evaluation of systematic errors for the continuous-wave NO2 differential absorption lidar employing a multimode laser diode.APPLIED OPTICS,59(29),9087-9097.
MLA	Cheng, Yuan,et al."Evaluation of systematic errors for the continuous-wave NO2 differential absorption lidar employing a multimode laser diode".APPLIED OPTICS 59.29(2020):9087-9097.