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Mitigation of Non-CO2 Aviation's Climate Impact by Changing Cruise Altitudes

Matthes, Sigrun and Lim, Ling and Burkhardt, Ulrike and Dahlmann, Katrin and Dietmüller, Simone and Grewe, Volker and Haslerud, Amund S. and Hendricks, Johannes and Owen, Bethan and Pitari, Giovanni and Righi, Mattia and Skowron, Agniezka (2021) Mitigation of Non-CO2 Aviation's Climate Impact by Changing Cruise Altitudes. Aerospace, 8 (36), pp. 1-20. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/aerospace8020036. ISSN 2226-4310.

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Official URL: https://www.mdpi.com/2226-4310/8/2/36


Aviation is seeking for ways to reduce its climate impact caused by CO2 emissions and non-CO2 effects. Operational measures which change overall flight altitude have the potential to reduce climate impact of individual effects, comprising CO2 but in particular non-CO2 effects. We study the impact of changes of flight altitude, specifically aircraft flying 2000 feet higher and lower, with a set of global models comprising chemistry-transport, chemistry-climate and general circulation models integrating distinct aviation emission inventories representing such alternative flight altitudes, estimating changes in climate impact of aviation by quantifying radiative forcing and induced temperature change. We find in our sensitivity study that flying lower leads to a reduction of radiative forcing of non-CO2 effects together with slightly increased CO2 emissions and impacts, when cruise speed is not modified. Flying higher increases radiative forcing of non-CO2 effects by about 10%, together with a slight decrease of CO2 emissions and impacts. Overall, flying lower decreases aviation-induced temperature change by about 20%, as a decrease of non-CO2 impacts by about 30% dominates over slightly increasing CO2 impacts assuming a sustained emissions scenario. Those estimates are connected with a large but unquantified uncertainty. To improve the understanding of mechanisms controlling the aviation climate impact, we study the geographical distributions of aviation-induced modifications in the atmosphere, together with changes in global radiative forcing and suggest further efforts in order to reduce long standing uncertainties.

Item URL in elib:https://elib.dlr.de/141316/
Document Type:Article
Additional Information:This article belongs to the Special Issue Selected Papers from 3rd ECATS Conference on Making Aviation Environmentally Sustainable.
Title:Mitigation of Non-CO2 Aviation's Climate Impact by Changing Cruise Altitudes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Matthes, SigrunDLR, IPAhttps://orcid.org/0000-0002-5114-2418
Lim, LingManchester Metropolitan Univ., UKUNSPECIFIED
Burkhardt, UlrikeDLR, IPAhttps://orcid.org/0000-0002-0742-7176
Dahlmann, KatrinDLR, IPAhttps://orcid.org/0000-0003-3198-1713
Grewe, VolkerDLR, IPAhttps://orcid.org/0000-0002-8012-6783
Haslerud, Amund S.CICERO, OSLO, Norwegenhttps://orcid.org/0000-0002-3812-3837
Hendricks, JohannesDLR, IPAUNSPECIFIED
Owen, BethanManchester Metropolitan Univ., Manchester, UKUNSPECIFIED
Pitari, GiovanniUniv. dell' Aquila, ItalienUNSPECIFIED
Righi, MattiaUNSPECIFIEDhttps://orcid.org/0000-0003-3827-5950
Date:31 January 2021
Journal or Publication Title:Aerospace
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1-20
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:aviation climate impact; mitigation strategies; non-CO2 effects; nitrogen oxides; alternative aircraft trajectories; alternative flight altitudes
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Air Transportation and Impact
DLR - Research area:Aeronautics
DLR - Program:L AI - Air Transportation and Impact
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Matthes, Dr. Sigrun
Deposited On:15 Mar 2021 15:23
Last Modified:20 Jun 2021 15:54

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