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Global sensitivity of aviation NOx effects to the HNO3-forming channel of the HO2+NO reaction

Gottschaldt, K. and Voigt, C. and Jöckel, P. and Righi, M. and Deckert, R. and Dietmüller, S. (2013) Global sensitivity of aviation NOx effects to the HNO3-forming channel of the HO2+NO reaction. Atmospheric Chemistry and Physics, 13, pp. 3003-3025. DOI: 10.5194/acp-13-3003-2013. ISSN 1680-7316.

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Official URL: http://www.atmos-chem-phys.net/13/3003/2013/


The impact of a recently proposed HNO3-forming channel of the HO2+NO reaction (Butkovskaya et al., 2005, 2007) on atmospheric mixing ratios of ozone, methane and their precursors is assessed with a global stratosphere-troposphere chemistry-climate model. Previous modelling studies applied a rate coefficient that depends only on pressure and temperature. We additionally considered a possible enhancement of the reaction by humidity, as found by a laboratory study (Butkovskaya et al., 2009). This particularly reduces the oxidation capacity of the atmosphere, increasing methane lifetime significantly. The effects of aircraft NOx emissions on atmospheric chemistry are altered when considering the above reaction, resulting in a negative net radiative forcing relative to an atmosphere without aviation NOx. Uncertainties associated with the inclusion of the HO2+NO → HNO3 reaction and with its corresponding rate coefficient propagate a considerable additional uncertainty on estimates of the climate impact of aviation and on NOx-related mitigation strategies.

Document Type:Article
Title:Global sensitivity of aviation NOx effects to the HNO3-forming channel of the HO2+NO reaction
AuthorsInstitution or Email of Authors
Gottschaldt, K.klaus-dirk.gottschaldt@dlr.de
Voigt, C.DLR
Jöckel, P.DLR-PA
Righi, M.DLR
Deckert, R.DLR
Dietmüller, S.DLR
Journal or Publication Title:Atmospheric Chemistry and Physics
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 3003-3025
Keywords:Atmosphärenchemie, Luftverkehr, globale Modellierung, Methan, NOx, Ozon
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Klaus-Dirk Gottschaldt
Deposited On:24 Sep 2012 13:04
Last Modified:12 Dec 2013 21:46

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