气候变化领域集成服务门户(CCPortal): Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates

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DOI	10.5194/amt-17-2317-2024
	Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates
	Noel, Stefan; Buchwitz, Michael; Hilker, Michael; Reuter, Maximilian; Weimer, Michael; Bovensmann, Heinrich; Burrows, John P.; Boesch, Hartmut; Lang, Ruediger
发表日期	2024
ISSN	1867-1381
EISSN	1867-8548
起始页码	17
结束页码	8
卷号	17 期号:8
英文摘要	The Anthropogenic Carbon Dioxide Monitoring (CO2M) mission is a constellation of satellites currently planned to be launched in 2026. CO2M is planned to be a core component of a Monitoring and Verification Support (MVS) service capacity under development as part of the Copernicus Atmosphere Monitoring Service (CAMS). The CO2M radiance measurements will be used to retrieve column-averaged dry-air mole fractions of atmospheric carbon dioxide ( XCO 2 ), methane ( XCH 4 ) and total columns of nitrogen dioxide ( NO 2 ). Using appropriate inverse modelling, the atmospheric greenhouse gas (GHG) observations will be used to derive United Nations Framework Convention on Climate Change (UNFCCC) COP 21 Paris Agreement relevant information on GHG sources and sinks. This challenging application requires highly accurate XCO 2 and XCH 4 retrievals. Three different retrieval algorithms to derive XCO 2 and XCH 4 are currently under development for the operational processing system at EUMETSAT. One of these algorithms uses the heritage of the FOCAL (Fast atmOspheric traCe gAs retrievaL) method, which has already successfully been applied to measurements from other satellites. Here, we show recent results generated using the CO2M version of FOCAL, called FOCAL-CO2M.To assess the quality of the FOCAL-CO2M retrievals, a large set of representative simulated radiance spectra has been generated using the radiative transfer model SCIATRAN. These simulations consider the planned viewing geometry of the CO 2 instrument and corresponding geophysical scene data (including different types of aerosols and varying surface properties), which were taken from model data for the year 2015. We consider instrument noise and systematic errors caused by the retrieval method but have not considered additional error sources due to, for example, instrumental issues, spectroscopy or meteorology. On the other hand, we have also not taken advantage in this study of CO2M's MAP (multi-angle polarimeter) instrument, which will provide additional information on aerosols and cirrus clouds. By application of the FOCAL retrieval to these simulated data, confidence is gained that the FOCAL method is able to fulfil the challenging requirements for systematic errors for the CO2M mission (spatio-temporal bias <= 0.5 ppm for XCO 2 and <= 5 ppb for XCH 4 ).
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001204803600001
来源期刊	ATMOSPHERIC MEASUREMENT TECHNIQUES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303965
作者单位	University of Bremen; European Organisation for the Exploitation of Meteorological Satellites
推荐引用方式 GB/T 7714	Noel, Stefan,Buchwitz, Michael,Hilker, Michael,et al. Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates[J],2024,17(8).
APA	Noel, Stefan.,Buchwitz, Michael.,Hilker, Michael.,Reuter, Maximilian.,Weimer, Michael.,...&Lang, Ruediger.(2024).Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates.ATMOSPHERIC MEASUREMENT TECHNIQUES,17(8).
MLA	Noel, Stefan,et al."Greenhouse gas retrievals for the CO2M mission using the FOCAL method: first performance estimates".ATMOSPHERIC MEASUREMENT TECHNIQUES 17.8(2024).