Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations

doi:10.5194/acp-21-12867-2021

	Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations
	Tian, Xin 2,3,4; Wang, Yang 1,8; Beirle, Steffen 1; Xie, Pinhua 4,5,6,7; Wagner, Thomas 1; Xu, Jin 4; Li, Ang 4; Dorner, Steffen 1; Ren, Bo 4,7; Li, Xiaomei 4
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2021-08-31
卷号	21
ISSN号	1680-7316
DOI	10.5194/acp-21-12867-2021
通讯作者	Wang, Yang(y.wang@mpic.de) ; Xie, Pinhua(phxie@aiofm.ac.cn)
英文摘要	Ground-based Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) is a state-of-theart remote sensing technique for deriving vertical profiles of trace gases and aerosols. However, MAX-DOAS profile inversions under aerosol pollution scenarios are challenging because of the complex radiative transfer and limited information content of the measurements. In this study, the performances of two inversion algorithms were evaluated for various aerosol pollution scenarios based on synthetic slant column densities (SCDs) derived from radiative transfer simulations. Compared to previous studies, in our study, much larger ranges of aerosol optical depth (AOD) and NO2 vertical column densities (VCDs) are covered. One inversion algorithm is based on optimal estimation; the other uses a parameterized approach. In this analysis, three types of profile shapes for aerosols and NO2 were considered: exponential, Boltzmann, and Gaussian. First, the systematic deviations of the retrieved aerosol profiles from the input profiles were investigated. For most cases, the AODs of the retrieved profiles were found to be systematically lower than the input values, and the deviations increased with increasing AOD. In particular for the optimal estimation algorithm and for high AOD, these findings are consistent with the results in previous studies. The assumed single scattering albedo (SSA) and asymmetry parameter (AP) have a systematic influence on the aerosol retrieval. However, for most cases the influence of the assumed SSA and AP on the retrieval results are rather small (compared to other uncertainties). For the optimal estimation algorithm, the agreement with the input values can be improved by optimizing the covariance matrix of the a priori uncertainties. Second, the aerosol effects on the NO2 profile retrieval were tested. Here, especially for the optimal estimation algorithm, a systematic dependence on the NO2 VCD was found, with a strong relative overestimation of the retrieved results for low NO2 VCDs and an underestimation for high NO2 VCDs. In contrast, the dependence on the aerosol profiles was found to be rather low. Interestingly, the results for both investigated wavelengths (360 and 477 nm) were found to be rather similar, indicating that the differences in the radiative transfer between both wavelengths have no strong effect. In general, both inversion schemes can retrieve the near-surface values of aerosol extinction and trace gas concentrations well.
资助项目	National Natural Science Foundation of China[41530644] ; National Natural Science Foundation of China[U19A2044] ; National Natural Science Foundation of China[41975037] ; National Natural Science Foundation of China[4210050475] ; Natural Science Foundation of Anhui Province[2008085QD183] ; Natural Science Foundation of Anhui Province[2008085QD182] ; Open Fund of Key Laboratory of Environmental Optics and Technology, Chinese Academy of Sciences[2005DP173065-2019-04]
WOS关键词	SLANT COLUMN MEASUREMENTS ; YANGTZE-RIVER DELTA ; ZENITH-SKY UV ; TROPOSPHERIC NO2 ; OPTICAL-PROPERTIES ; SATELLITE-OBSERVATIONS ; VERTICAL PROFILES ; BOUNDARY-LAYER ; TRANSFER MODEL ; NORTH CHINA
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000692618900003
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; Open Fund of Key Laboratory of Environmental Optics and Technology, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125249]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Yang; Xie, Pinhua
作者单位	1.Max Planck Inst Chem, D-55128 Mainz, Germany 2.Anhui Univ, Inst Phys Sci, Informat Mat & Intelligent Sensing Lab Anhui Prov, Hefei 230601, Peoples R China 3.Anhui Univ, Inst Informat Technol, Informat Mat & Intelligent Sensing Lab Anhui Prov, Hefei 230601, Peoples R China 4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 5.Chinese Acad Sci, CAS Ctr Excellence Urban Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 7.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 8.EUMETSAT, Darmstadt, Germany
推荐引用方式 GB/T 7714	Tian, Xin,Wang, Yang,Beirle, Steffen,et al. Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2021,21.
APA	Tian, Xin.,Wang, Yang.,Beirle, Steffen.,Xie, Pinhua.,Wagner, Thomas.,...&Li, Xiaomei.(2021).Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21.
MLA	Tian, Xin,et al."Technical note: Evaluation of profile retrievals of aerosols and trace gases for MAX-DOAS measurements under different aerosol scenarios based on radiative transfer simulations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21(2021).