气候变化领域集成服务门户(CCPortal): Validation of the TROPOMI/S5P aerosol layer height using EARLINET lidars

CCPortal

DOI	10.5194/acp-23-1919-2023
	Validation of the TROPOMI/S5P aerosol layer height using EARLINET lidars
	Michailidis, Konstantinos; Koukouli, Maria-Elissavet; Balis, Dimitris; Veefkind, J. Pepijn; de Graaf, Martin; Mona, Lucia; Papagianopoulos, Nikolaos; Pappalardo, Gesolmina; Tsikoudi, Ioanna; Amiridis, Vassilis; Marinou, Eleni; Gialitaki, Anna; Mamouri, Rodanthi-Elisavet; Nisantzi, Argyro; Bortoli, Daniele; Joao Costa, Maria; Salgueiro, Vanda; Papayannis, Alexandros; Mylonaki, Maria; Alados-Arboledas, Lucas; Romano, Salvatore; Perrone, Maria Rita; Baars, Holger
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	1919
结束页码	1940
卷号	23 期号:3 页码:22
英文摘要	The purpose of this study is to investigate the ability of the Sentinel-5P TROPOspheric Monitoring Instrument (TROPOMI) to derive accurate geometrical features of lofted aerosol layers, selecting the Mediterranean Basin as the study area. Comparisons with ground-based correlative measurements constitute a key component in the validation of passive and active satellite aerosol products. For this purpose, we use ground-based observations from quality-controlled lidar stations reporting to the European Aerosol Research Lidar Network (EARLINET). An optimal methodology for validation purposes has been developed and applied using the EARLINET optical profiles and TROPOMI aerosol products, aiming at the in-depth evaluation of the TROPOMI aerosol layer height (ALH) product for the period 2018 to 2022 over the Mediterranean Basin. Seven EARLINET stations were chosen, taking into consideration their proximity to the sea, which provided 63 coincident aerosol cases for the satellite retrievals. In the following, we present the first validation results for the TROPOMI/S5P ALH using the optimized EARLINET lidar products employing the automated validation chain designed for this purpose. The quantitative validation at pixels over the selected EARLINET stations illustrates that the TROPOMI ALH product is consistent with the EARLINET lidar products, with a high correlation coefficient R = 0.82 (R = 0.51) and a mean bias of -0.51 +/- 0.77 km and -2.27 +/- 1.17 km over ocean and land, respectively. Overall, it appears that aerosol layer altitudes retrieved from TROPOMI are systematically lower than altitudes from the lidar retrievals. High-albedo scenes, as well as low-aerosol-load scenes, are the most challenging for the TROPOMI retrieval algorithm, and these results testify to the need to further investigate the underlying cause. This work provides a clear indication that the TROPOMI ALH product can under certain conditions achieve the required threshold accuracy and precision requirements of 1 km, especially when only ocean pixels are included in the comparison analysis. Furthermore, we describe and analyse three case studies in detail, one dust and two smoke episodes, in order to illustrate the strengths and limitations of the TROPOMI ALH product and demonstrate the presented validation methodology. The present analysis provides important additions to the existing validation studies that have been performed so far for the TROPOMI S5P ALH product, which were based only on satellite-to-satellite comparisons.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000926589600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273630
作者单位	Royal Netherlands Meteorological Institute; Delft University of Technology; Consiglio Nazionale delle Ricerche (CNR); Istituto di Metodologie per l'Analisi Ambientale (IMAA-CNR); National Observatory of Athens; National & Kapodistrian University of Athens; Cyprus University of Technology; University of Evora; University of Evora; Leibniz Institut fur Tropospharenforschung (TROPOS); National Technical University of Athens; Universidad de Cordoba; Universidad de Jaen; University of Granada; Instituto Interuniversitario de Investigacion del Sistema Tierra en Andalucia
推荐引用方式 GB/T 7714	Michailidis, Konstantinos,Koukouli, Maria-Elissavet,Balis, Dimitris,et al. Validation of the TROPOMI/S5P aerosol layer height using EARLINET lidars[J],2023,23(3):22.
APA	Michailidis, Konstantinos.,Koukouli, Maria-Elissavet.,Balis, Dimitris.,Veefkind, J. Pepijn.,de Graaf, Martin.,...&Baars, Holger.(2023).Validation of the TROPOMI/S5P aerosol layer height using EARLINET lidars.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(3),22.
MLA	Michailidis, Konstantinos,et al."Validation of the TROPOMI/S5P aerosol layer height using EARLINET lidars".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.3(2023):22.