气候变化领域集成服务门户(CCPortal): Volcanic SO2 layer height by TROPOMI/S5P: evaluation against IASI/MetOp and CALIOP/CALIPSO observations

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DOI	10.5194/acp-22-5665-2022
	Volcanic SO2 layer height by TROPOMI/S5P: evaluation against IASI/MetOp and CALIOP/CALIPSO observations
	Koukouli, Maria-Elissavet; Michailidis, Konstantinos; Hedelt, Pascal; Taylor, Isabelle A.; Inness, Antje; Clarisse, Lieven; Balis, Dimitris; Efremenko, Dmitry; Loyola, Diego; Grainger, Roy G.; Retscher, Christian
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	5665
结束页码	5683
卷号	22 期号:8 页码:19
英文摘要	Volcanic eruptions eject large amounts of ash and trace gases such as sulfur dioxide (SO2) into the atmosphere. A significant difficulty in mitigating the impact of volcanic SO(2 )clouds on air traffic safety is that these gas emissions can be rapidly transported over long distances. The use of space-borne instruments enables the global monitoring of volcanic SO2 emissions in an economical and risk-free manner. Within the European Space Agency (ESA) Sentinel-5p+ Innovation project, the S5P SO2 layer height (S5P+I: SO2LH) activities led to the improvements of the retrieval algorithm and generation of the corresponding near real-time S5P SO2 LH products. These are currently operationally provided, in near real-time, by the German Aerospace Center (DLR) within the framework of the Innovative Products for Analyses of Atmospheric Composition (INPULS) project. The main aim of this paper is to present its extensive verification, accomplished within the S5P+I: SO2LH project, over major recent volcanic eruptions, against collocated space-borne measurements from the IASI/Me-top and CALIOP/CALIPSO instruments as well as assess its impact on the forecasts provided by the Copernicus Atmospheric Monitoring Service (CAMS). The mean difference between S5P and IASI observations for the Raikoke 2019, the Nishinoshima 2020 and the La Soufriere-St Vincent 2021 eruptive periods is similar to 0.5 +/- 3 km, while for the Taal 2020 eruption, a larger difference was found, between 3 +/- 3 km and 4 +/- 3 km. The comparison of the daily mean SO2 LH further demonstrates the capabilities of this near real-time product, with slopes between 0.8 and 1 and correlation coefficients ranging between 0.6 and 0.8. Comparisons between the S5P SO2 LH and the CALIOP/CALIPSO ash plumes revealed an expected bias at -2.5 +/- 2 km, considering that the injected SO2 and ash plume locations do not always coincide over an eruption. Furthermore, the CAMS assimilation of the S5P SO2 LH product led to much improved model output against the non-assimilated IASI LH, with a mean difference of 1.5 +/- 2 km, compared to the original CAMS analysis, and improved the geographical spread of the Raikoke volcanic plume following the eruptive days.
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:000788181500001
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/273234
作者单位	Aristotle University of Thessaloniki; Helmholtz Association; German Aerospace Centre (DLR); University of Oxford; European Centre for Medium-Range Weather Forecasts (ECMWF); Universite Libre de Bruxelles; European Space Agency
推荐引用方式 GB/T 7714	Koukouli, Maria-Elissavet,Michailidis, Konstantinos,Hedelt, Pascal,et al. Volcanic SO2 layer height by TROPOMI/S5P: evaluation against IASI/MetOp and CALIOP/CALIPSO observations[J],2022,22(8):19.
APA	Koukouli, Maria-Elissavet.,Michailidis, Konstantinos.,Hedelt, Pascal.,Taylor, Isabelle A..,Inness, Antje.,...&Retscher, Christian.(2022).Volcanic SO2 layer height by TROPOMI/S5P: evaluation against IASI/MetOp and CALIOP/CALIPSO observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(8),19.
MLA	Koukouli, Maria-Elissavet,et al."Volcanic SO2 layer height by TROPOMI/S5P: evaluation against IASI/MetOp and CALIOP/CALIPSO observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.8(2022):19.