Airborne cavity enhanced absorption spectroscopy for high time resolution measurements of atmospheric NO2

doi:10.7498/aps.66.090704

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院安徽光学精密机械研究所

	Airborne cavity enhanced absorption spectroscopy for high time resolution measurements of atmospheric NO2
	Liang Shuai-Xi 1,2,3; Qin Min 1,2; Duan Jun1,2 ; Fang Wu 1,2; Li Ang 1,2; Xu Jin 1,2; Lu Xue1,2,3 ; Tang Ke 1,2,3; Xie Pin-Hua 1,2,3,4; Liu Jian-Guo1,2,3,4
刊名	ACTA PHYSICA SINICA
	2017-05-05
卷号	66 期号:9 页码:1-8
关键词	Incoherent Broadband Cavity Enhanced Absorption Spectrometer Airborne Troposphere No2 Profile
DOI	10.7498/aps.66.090704
文献子类	Article
英文摘要	Nitrogen dioxide (NO2) is an important trace gas in the troposphere and plays a vital role in many aspects of the chemistry of the atmosphere. Accurate measurement of NO2 is the primary step to understand its role in atmospheric chemistry and to establish effective pollution prevention policies. Relatively few measurements of the NO2 profile in troposphere by using point-type instruments with high temporal resolution have been carried out in China. Due to the relatively poor measurement environment on airborne platform, the measurement system requires good anti-vibration ability, stability and environmental adaptability. A home-built incoherent broadband cavity enhanced absorption spectrometer (IBBCEAS) on the airborne platform is presented in this paper, and applied to high temporal resolution observations of the actual atmospheric NO2 spatial distribution. According to the strong absorption of NO2 in a wavelength range from 449 nm to 470 nm, we choose a high-power 457 nm light-emitting diode (LED) as a light source. A Peltier is used to control LED temperature and to stabilize the LED temperature at (20 +/- 0.1) degrees C. The pure PFA material optical cavity and sampling tube are used to reduce wall loss. And we choose the highly reflecting mirrors (reflectivity R > 0.9999@ 440-450 nm) to improve the effective optical path. A 2 mu m filter is used at the inlet of instrument to remove most of the particulate matter in the sample flows, which reduce the effect of particulate matter on the effective path length. In order to meet the requirement for time resolution in airborne measurement, we use an off-axis paraboloic mirror instead of an achromatic lens to improve the optical coupling efficiency. The reflectivity of the highly reflecting mirror is calibrated by the difference in Rayleigh scattering between He and N-2. And the optimum averaging time of the IBBCEAS instrument is confirmed to be 1000 s by the Allan variance analysis. Detection limit (1 sigma) of 10 ppt for NO2 is achieved with an optimum acquisition time of 1000 s. Concentrations of NO2 are recorded and compared with data from a long path different optical absorption spectroscopy instrument, and the results show good agreement with each other. The linear correlation coefficient R-2 is 0.86 in a slope of 0.92 with an offset of -0.402 ppb. The IBBCEAS system is deployed on an airborne platform, and the detection limit is 95 ppt (1 sigma) with a time resolution of 2 s. The profile of tropospheric NO2 by airborne observation is obtained over Shijiazhuang in Northern China. IBBCEAS system in the airborne platform shows good stability.
WOS关键词	IN-SITU ; SPECTROMETER ; AIRCRAFT ; INSTRUMENT ; GLYOXAL ; DOAS ; N2O5 ; BRO ; O-3
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000403077300009
资助机构	National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; 41571130023 ; 41571130023 ; 41571130023 ; 41571130023 ; 61275151) ; 61275151) ; 61275151) ; 61275151) ; National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National Natural Science Foundation of China(91544104 ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; National High Technology Research and Development Program of China(2014AA06A508) ; 41571130023 ; 41571130023 ; 41571130023 ; 41571130023 ; 61275151) ; 61275151) ; 61275151) ; 61275151)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/31867]
专题	合肥物质科学研究院_中科院安徽光学精密机械研究所
作者单位	1.Chinese Acad Sci, Key Lab Environm Opt & Technol, Anhui Inst Opt & Fine Mech, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.CAS Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Liang Shuai-Xi,Qin Min,Duan Jun,et al. Airborne cavity enhanced absorption spectroscopy for high time resolution measurements of atmospheric NO2[J]. ACTA PHYSICA SINICA,2017,66(9):1-8.
APA	Liang Shuai-Xi.,Qin Min.,Duan Jun.,Fang Wu.,Li Ang.,...&Liu Wen-Qing.(2017).Airborne cavity enhanced absorption spectroscopy for high time resolution measurements of atmospheric NO2.ACTA PHYSICA SINICA,66(9),1-8.
MLA	Liang Shuai-Xi,et al."Airborne cavity enhanced absorption spectroscopy for high time resolution measurements of atmospheric NO2".ACTA PHYSICA SINICA 66.9(2017):1-8.