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Concept of climate-charged airspaces: a potential policy instrument for internalizing aviation's climate impact of non-CO2 effects

Niklaß, Malte and Grewe, Volker and Gollnick, Volker and Dahlmann, Katrin (2021) Concept of climate-charged airspaces: a potential policy instrument for internalizing aviation's climate impact of non-CO2 effects. Climate Policy, pp. 1-20. Taylor & Francis. doi: 10.1080/14693062.2021.1950602. ISSN 1469-3062.

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Official URL: https://doi.org/10.1080/14693062.2021.1950602


Approximately 50-75% of aviation's climate impact is caused by non-CO2 effects, like the production of ozone and the formation of contrail cirrus clouds, which can be effectively prevented by re-routing flights around highly climate-sensitive areas. Here, we discuss options how to incentivize re-routing approaches and apply multicriteria trajectory optimizations to demonstrate the feasibility of the concept of climate-charged airspaces (CCAs). We show that although climate-optimized re-routing results in slightly longer flight times, increased fuel consumption and higher operating costs, it is more climate-friendly compared to a cost-optimized routing. In accordance to other studies, we find that the averaged temperature response over 100 years (ATR100) of a single flight can be reduced by up to 40%. However, if mitigation efforts are associated with a direct increase in costs, there is a need for climate policies. To address the lack of incentivizing airlines to internalize their climate costs, this study focuses on the CCA concept, which imposes a climate charge on airlines when operating in highly climate-sensitive areas. If CCAs are (partly) bypassed, both climate impact and operating costs of a flight can be reduced: a more climate-friendly routing becomes economically attractive. For an exemplary North-Atlantic network, CCAs create a financial incentive for climate mitigation, achieving on average more than 90% of the climate impact reduction potential of climate-optimized trajectories (theoretical maximum, benchmark). Key policy insights . Existing climate policies for aviation do not address non-CO2 effects, which are very sensitive to the location and the timing of the emission. . By imposing a temporary climate charge for airlines that operate in highly climate-sensitive regions, the trade-off between economic viability and environmental compatibility could be resolved: Climate impact mitigation of non-CO2 effects coincides with cutting costs. . To ensure easy planning and verification, climate charges are calculated analogously to en-route and terminal charges. For climate mitigation it is therefore neither necessary to monitor emissions (CO2, NOx, etc.) nor to integrate complex non-CO2 effects into flight planning procedures of airlines. . Its implementation is feasible and effective.

Item URL in elib:https://elib.dlr.de/143428/
Document Type:Article
Title:Concept of climate-charged airspaces: a potential policy instrument for internalizing aviation's climate impact of non-CO2 effects
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Niklaß, MalteMalte.Niklass (at) dlr.dehttps://orcid.org/0000-0001-6760-8561
Grewe, VolkerDLR, IPAhttps://orcid.org/0000-0002-8012-6783
Gollnick, VolkerVolker.Gollnick (at) dlr.deUNSPECIFIED
Dahlmann, KatrinDLR, IPAhttps://orcid.org/0000-0003-3198-1713
Date:July 2021
Journal or Publication Title:Climate Policy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1080/14693062.2021.1950602
Page Range:pp. 1-20
Publisher:Taylor & Francis
Keywords:Transport policy; aviation emissions; climate change mitigation; cost-benefit analysis; non-CO2 effects; trajectory optimization
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 - Air Transport Operations and Impact Assessment, L - Climate, Weather and Environment
Location: Hamburg , Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Earth System Modelling
Air Transport Operations > Air Transport Operations and Infrastructure
Deposited By: Niklaß, Malte
Deposited On:10 Aug 2021 11:56
Last Modified:17 Aug 2021 08:23

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