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Quantification of CH4 emissions from waste disposal sites near the city of Madrid using ground- and space-based observations of COCCON, TROPOMI and IASI

Atmospheric chemistry and physics, 2022-01, Vol.22 (1), p.295-317 [Peer Reviewed Journal]

2022. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1680-7316 ;EISSN: 1680-7324 ;DOI: 10.5194/acp-22-295-2022

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Title:
Quantification of CH4 emissions from waste disposal sites near the city of Madrid using ground- and space-based observations of COCCON, TROPOMI and IASI
Author: Tu, Qiansi ; Hase, Frank ; Schneider, Matthias ; García, Omaira ; Blumenstock, Thomas ; Borsdorff, Tobias ; Frey, Matthias ; Khosrawi, Farahnaz ; Lorente, Alba ; Alberti, Carlos ; Bustos, Juan J ; Butz, André ; Carreño, Virgilio ; Cuevas, Emilio ; Curcoll, Roger ; Diekmann, Christopher J ; Dubravica, Darko ; Ertl, Benjamin ; Estruch, Carme ; Sergio Fabián León-Luis ; Marrero, Carlos ; Josep-Anton Morgui ; Ramos, Ramón ; Scharun, Christian ; Schneider, Carsten ; Sepúlveda, Eliezer ; Toledano, Carlos ; Torres, Carlos
Subjects: Air pollution ; Algorithms ; Anomalies ; Atmospheric sounding ; Carbon ; City centres ; Data analysis ; Datasets ; Disposal sites ; Emission analysis ; Emission measurements ; Emissions ; Gases ; Greenhouse effect ; Greenhouse gases ; Ground-based observation ; Infrared instruments ; Infrared interferometers ; Instruments ; Landfill ; Landfill gas ; Landfills ; Measuring instruments ; Methane ; Metropolitan areas ; Mixing ratio ; Monitoring ; Monitoring instruments ; Plumes ; Pollutants ; Pollution sources ; Satellite data ; Satellite observation ; Satellite-borne instruments ; Satellites ; Space based ; Spectrum analysis ; Strength ; Trace gases ; Troposphere ; Waste disposal ; Waste disposal sites ; Wind
Is Part Of: Atmospheric chemistry and physics, 2022-01, Vol.22 (1), p.295-317
Description: The objective of this study is to derive methane (CH4) emissions from three landfills, which are found to be the most significant CH4 sources in the metropolitan area of Madrid in Spain. We derive CH4 emissions from the CH4 enhancements observed by spaceborne and ground-based instruments. We apply satellite-based measurements from the TROPOspheric Monitoring Instrument (TROPOMI) and the Infrared Atmospheric Sounding Interferometer (IASI) together with measurements from the ground-based COllaborative Carbon Column Observing Network (COCCON) instruments. In 2018, a 2-week field campaign for measuring the atmospheric concentrations of greenhouse gases was performed in Madrid in the framework of Monitoring of the Greenhouse Gases Concentrations in Madrid (MEGEI-MAD) project. Five COCCON instruments were deployed at different locations around the Madrid city center, enabling the observation of total column-averaged CH4 mixing ratios (XCH4). Considering the prevalent wind regimes, we calculate the wind-assigned XCH4 anomalies for two opposite wind directions. Pronounced bipolar plumes are found when applying the method to NO2, which implies that our method of wind-assigned anomaly is suitable to estimate enhancements of trace gases at the urban level from satellite-based measurements. For quantifying the CH4 emissions, the wind-assigned plume method is applied to the TROPOMI XCH4 and to the lower tropospheric CH4 / dry-air column ratio (TXCH4) of the combined TROPOMI+IASI product. As CH4 emission strength we estimate 7.4 × 1025 ± 6.4 × 1024 molec. s-1 from the TROPOMI XCH4 data and 7.1 × 1025 ± 1.0 × 1025 molec. s-1 from the TROPOMI+IASI merged TXCH4 data. We use COCCON observations to estimate the local source strength as an independent method. COCCON observations indicate a weaker CH4 emission strength of 3.7 × 1025 molec. s-1 from a local source (the Valdemingómez waste plant) based on observations from a single day. This strength is lower than the one derived from the satellite observations, and it is a plausible result. This is because the analysis of the satellite data refers to a larger area, covering further emission sources in the study region, whereas the signal observed by COCCON is generated by a nearby local source. All emission rates estimated from the different observations are significantly larger than the emission rates provided via the official Spanish Register of Emissions and Pollutant Sources.
Publisher: Katlenburg-Lindau: Copernicus GmbH
Language: English
Identifier: ISSN: 1680-7316
EISSN: 1680-7324
DOI: 10.5194/acp-22-295-2022
Source: Geneva Foundation Free Medical Journals at publisher websites
Alma/SFX Local Collection
ProQuest Central
DOAJ Directory of Open Access Journals

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Quantification of CH4 emissions from waste disposal sites near the city of Madrid using ground- and space-based observations of COCCON, TROPOMI and IASI

2022. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1680-7316 ;EISSN: 1680-7324 ;DOI: 10.5194/acp-22-295-2022

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