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Attributing ozone to NOx emissions: Implications for climate mitigation measures

Grewe, Volker and Dahlmann, Katrin and Matthes, Sigrun and Steinbrecht, Wolfgang (2012) Attributing ozone to NOx emissions: Implications for climate mitigation measures. Atmospheric Environment, 59, pp. 102-107. DOI: 10.1016/j.atmosenv.2012.05.002.

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Official URL: http://www.sciencedirect.com/science/article/pii/S1352231012004335

Abstract

Emissions of nitrogen oxides (NOx) lead to formation of ozone, which is an important greenhouse gas. Despite its relevance, little emphasis was previously given on verifying approaches to calculate contributions of individual emissions to ozone and hence to climate change. Basically two methods (perturbation method and tagging method) were used in the past. We demonstrate that both methods are valid and have their area of application, but only tagging calculates contributions of emissions to concentrations, whereas the perturbation method identifies changes in the ozone concentrations due to emission changes. Our results show that the contribution of road traffic emissions to climate change is underestimated by a factor of 5 in the perturbation method. This is caused by non-linear compensating effects from other emission sectors, which are concealed in the perturbation method but disclosed with tagging. Consequently, the effectiveness of mitigation measures for individual sectors (i.e. concentrating on road traffic induced ozone) is only correctly expressed by the tagging method. The perturbation method provides accurately the total impact (i.e. total ozone) of a mitigation measure. However, current approaches, which evaluate the effectiveness of a mitigation measure based on the perturbation approach, do not reflect changes in the chemical state of the atmosphere (i.e. ozone production rates). These largely affect the effectiveness of subsequent measures and hence make the evaluation of the effectiveness of two measures dependent on their chronology of application. We show that also in this regard, the tagging method is better suited to evaluate the effectiveness of a mitigation measure than the perturbation method.

Document Type:Article
Title:Attributing ozone to NOx emissions: Implications for climate mitigation measures
Authors:
AuthorsInstitution or Email of Authors
Grewe, VolkerVolker.Grewe@dlr.de
Dahlmann, KatrinKatrin.Dahlmann@dlr.de
Matthes, SigrunSigrun.Matthes@dlr.de
Steinbrecht, WolfgangDWD, Hohenpeißenberg
Date:November 2012
Journal or Publication Title:Atmospheric Environment
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:59
DOI:10.1016/j.atmosenv.2012.05.002
Page Range:pp. 102-107
Status:Published
Keywords:NOx emissions; Climate change mitigation; Ozone chemistry; Tagging
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport, Space, Aeronautics
HGF - Program Themes:Transport System, Earth Observation, ATM and Operation
DLR - Research area:Transport, Raumfahrt, Aeronautics
DLR - Program:V VS - Verkehrssystem, R EO - Erdbeobachtung, L AO - Air Traffic Management and Operation
DLR - Research theme (Project):V - VEU (old), R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment, V - Verkehrsentwicklung und Umwelt (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr.rer.nat. Volker Grewe
Deposited On:21 Aug 2012 15:06
Last Modified:12 Dec 2013 21:45

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