Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe

Abstract Nitrogen oxide (NOx) pollution is emerging as a primary environmental concern across Europe. While some large European metropolitan areas are already in breach of EU safety limits for NO2, this phenomenon does not seem to be only restricted to large industrialized areas anymore. Many smalle...

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Autores principales:	T. Karl, M. Graus, M. Striednig, C. Lamprecht, A. Hammerle, G. Wohlfahrt, A. Held, L. von der Heyden, M. J. Deventer, A. Krismer, C. Haun, R. Feichter, J. Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/618186fcb5fe4bd588a26471757b42f7
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spelling	oai:doaj.org-article:618186fcb5fe4bd588a26471757b42f72021-12-02T11:51:02ZUrban eddy covariance measurements reveal significant missing NOx emissions in Central Europe10.1038/s41598-017-02699-92045-2322https://doaj.org/article/618186fcb5fe4bd588a26471757b42f72017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02699-9https://doaj.org/toc/2045-2322Abstract Nitrogen oxide (NOx) pollution is emerging as a primary environmental concern across Europe. While some large European metropolitan areas are already in breach of EU safety limits for NO2, this phenomenon does not seem to be only restricted to large industrialized areas anymore. Many smaller scale populated agglomerations including their surrounding rural areas are seeing frequent NO2 concentration violations. The question of a quantitative understanding of different NOx emission sources is therefore of immanent relevance for climate and air chemistry models as well as air pollution management and health. Here we report simultaneous eddy covariance flux measurements of NOx, CO2, CO and non methane volatile organic compound tracers in a city that might be considered representative for Central Europe and the greater Alpine region. Our data show that NOx fluxes are largely at variance with modelled emission projections, suggesting an appreciable underestimation of the traffic related atmospheric NOx input in Europe, comparable to the weekend-weekday effect, which locally changes ozone production rates by 40%.T. KarlM. GrausM. StriednigC. LamprechtA. HammerleG. WohlfahrtA. HeldL. von der HeydenM. J. DeventerA. KrismerC. HaunR. FeichterJ. LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q T. Karl M. Graus M. Striednig C. Lamprecht A. Hammerle G. Wohlfahrt A. Held L. von der Heyden M. J. Deventer A. Krismer C. Haun R. Feichter J. Lee Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
description	Abstract Nitrogen oxide (NOx) pollution is emerging as a primary environmental concern across Europe. While some large European metropolitan areas are already in breach of EU safety limits for NO2, this phenomenon does not seem to be only restricted to large industrialized areas anymore. Many smaller scale populated agglomerations including their surrounding rural areas are seeing frequent NO2 concentration violations. The question of a quantitative understanding of different NOx emission sources is therefore of immanent relevance for climate and air chemistry models as well as air pollution management and health. Here we report simultaneous eddy covariance flux measurements of NOx, CO2, CO and non methane volatile organic compound tracers in a city that might be considered representative for Central Europe and the greater Alpine region. Our data show that NOx fluxes are largely at variance with modelled emission projections, suggesting an appreciable underestimation of the traffic related atmospheric NOx input in Europe, comparable to the weekend-weekday effect, which locally changes ozone production rates by 40%.
format	article
author	T. Karl M. Graus M. Striednig C. Lamprecht A. Hammerle G. Wohlfahrt A. Held L. von der Heyden M. J. Deventer A. Krismer C. Haun R. Feichter J. Lee
author_facet	T. Karl M. Graus M. Striednig C. Lamprecht A. Hammerle G. Wohlfahrt A. Held L. von der Heyden M. J. Deventer A. Krismer C. Haun R. Feichter J. Lee
author_sort	T. Karl
title	Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
title_short	Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
title_full	Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
title_fullStr	Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
title_full_unstemmed	Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe
title_sort	urban eddy covariance measurements reveal significant missing nox emissions in central europe
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/618186fcb5fe4bd588a26471757b42f7
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Urban eddy covariance measurements reveal significant missing NOx emissions in Central Europe

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