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Global sensitivity of aviation NOx effects to the HO2 + NO → HNO3 reaction

Gottschaldt, Klaus-Dirk and Voigt, Christiane and Jöckel, Patrick and Righi, Mattia and Dietmüller, Simone (2012) Global sensitivity of aviation NOx effects to the HO2 + NO → HNO3 reaction. In: Proceedings of the 3rd International Conference on Transport Atmospher and Climate (TAC-3), 2012 (17), pp. 77-84. DLR. 3rd International Conference on Transport, Atmosphere and Climate (TAC-3), Prien am Chiemsee. ISSN ISSN 1434-8454

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Official URL: http://www.pa.op.dlr.de/tac/2012/Proceedings_of_TAC3_conference_final.pdf

Abstract

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.

Item URL in elib:https://elib.dlr.de/97040/
Document Type:Conference or Workshop Item (Speech)
Title:Global sensitivity of aviation NOx effects to the HO2 + NO → HNO3 reaction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gottschaldt, Klaus-DirkDLR, IPAUNSPECIFIED
Voigt, ChristianeDLR, IPAUNSPECIFIED
Jöckel, PatrickDLR, IPAUNSPECIFIED
Righi, MattiaDLR, IPAUNSPECIFIED
Dietmüller, SimoneDLR, IPAUNSPECIFIED
Date:2012
Journal or Publication Title:Proceedings of the 3rd International Conference on Transport Atmospher and Climate (TAC-3)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2012
Page Range:pp. 77-84
Editors:
EditorsEmail
Sausen, RobertDLR, IPA
Unterstrasser, SimonDLR, IPA
Blum, AnjaDLR, IPA
Publisher:DLR
Series Name:DLR-Forschungsbericht
ISSN:ISSN 1434-8454
Status:Published
Keywords:aircraft NOx effects, atmospheric chemistry simulations
Event Title:3rd International Conference on Transport, Atmosphere and Climate (TAC-3)
Event Location:Prien am Chiemsee
Event Type:international Conference
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
Deposited By: Gottschaldt, Klaus-Dirk
Deposited On:09 Jul 2015 17:05
Last Modified:31 Jul 2019 19:53

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