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Impact of road traffic emissions on tropospheric ozone

Mertens, Mariano and Tsati, Eleni and Kerkweg, Astrid and Grewe, Volker and Jöckel, Patrick and Friedrich, Rainer (2014) Impact of road traffic emissions on tropospheric ozone. COSMO / CLM / ART User Seminar 2014, 17-19 Mar 2014, Offenbach, Germany. (Unpublished)

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Emissions from road traffic are important anthropogenic sources of carbon monoxide (CO), nitrogen oxide (NOx) and non-methane hydrocarbons (NMHCs). In a complex nonlinear chemical mechanism these substances act as precursor for tropospheric ozone. Despite this nonlinear chemistry the sensitivity of the ozone production from road traffic emissions is often studied using the perturbation approach. In this approach the chemical system is linearized around a reference simulation. This method is well suited while studying the impacts of emission policies, but it can cause misinterpretations while evaluating the attribution of different sources on chemical species. For such questions the “tagging” method is well suited which is an accounting system following the reaction pathways of the different species from different sources, allowing to study the nonlinear behavior of the chemical system. Therefore we are using this tagging method to evaluate the impact of road traffic emissions on the tropospheric ozone and further compare these results with sensitivity studies. A tagging method has been integrated into the MECO(n) modelsystem (MESSyfied ECHAM and COSMO models nested n-times) which couples the regional scale chemistry-climate system COSMO/MESSy (in one direction) with the global chemistry-climate System EMAC. In contrast to the popular off-line coupling MECO(n) uses an on-line coupling allowing us to couple not only the dynamical variables but also the chemical variables in every time step of the global model. This model chain enables us to be (with respect to diagnostic methods and the boundary conditions) as consistent as possible from the global to the local scale and to evaluate the impact of the lateral resolution on detailed ozone-chemistry diagnostics like the tagging method. We present first results comparing simulations using the “perturbation approach” with the results from the tagging method focusing on the impact of road traffic emissions in Europe from global to local scale.

Item URL in elib:https://elib.dlr.de/88597/
Document Type:Conference or Workshop Item (Speech)
Title:Impact of road traffic emissions on tropospheric ozone
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kerkweg, AstridJohannes-Gutenberg Univ., MainzUNSPECIFIED
Friedrich, RainerUniversität Stuttgart, IER, GermanyUNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Verkehr, Ozon, Klima, Emissionen, Luftqualität
Event Title:COSMO / CLM / ART User Seminar 2014
Event Location:Offenbach, Germany
Event Type:Workshop
Event Dates:17-19 Mar 2014
Organizer:Deutscher Wetterdienst (DWD, German Weather Service)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Mertens, Mariano
Deposited On:24 Mar 2014 14:15
Last Modified:31 Jul 2019 19:45

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