Articles | Volume 23, issue 14
https://doi.org/10.5194/acp-23-8081-2023
https://doi.org/10.5194/acp-23-8081-2023
Research article
 | 
19 Jul 2023
Research article |  | 19 Jul 2023

Towards near-real-time air pollutant and greenhouse gas emissions: lessons learned from multiple estimates during the COVID-19 pandemic

Marc Guevara, Hervé Petetin, Oriol Jorba, Hugo Denier van der Gon, Jeroen Kuenen, Ingrid Super, Claire Granier, Thierno Doumbia, Philippe Ciais, Zhu Liu, Robin D. Lamboll, Sabine Schindlbacher, Bradley Matthews, and Carlos Pérez García-Pando

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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Cited articles

Badia, A., Langemeyer, J., Codina, X., Gilabert, J., Guilera, N., Vidal, V., Segura, R., Vives, M., and Villalba, G.: A take-home message from COVID-19 on urban air pollution reduction through mobility limitations and teleworking, Urban Sustain., 1, 35, https://doi.org/10.1038/s42949-021-00037-7, 2021. 
BEIS: Provisional UK greenhouse gas emissions national statistics, 2021, https://www.gov.uk/government/statistics/provisional-uk-greenhouse-gas-emissions-national-statistics-2021 (last access: January 2023), 2022. C3S (Copernicus Climate Change Service): ERA5: Fifth generation of ECMWF atmospheric reanalyses of the global climate, Copernicus Climate Change Service Climate Data Store (CDS), https://cds.climate.copernicus.eu/cdsapp#!/home (last access: May 2021), 2017. 
C3S (Copernicus Climate Change Service): Climate bulletin. European State of the Climate 2020, Warm winter, https://climate.copernicus.eu/esotc/2020/warm-winter (last access: October 2022), 2020a. 
Castellanos, P. and Boersma, K.: Reductions in nitrogen oxides over Europe driven by environmental policy and economic recession, Sci. Rep., 2, 265, https://doi.org/10.1038/srep00265, 2012. 
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Short summary
This study provides an intercomparison of European 2020 emission changes derived from official inventories, which are reported by countries under the framework of several international conventions and directives, and non-official near-real-time estimates, the use of which has significantly grown since the COVID-19 outbreak. The results of the work are used to produce recommendations on how best to approach and make use of near-real-time emissions for modelling and monitoring applications.
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