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Suitable climate metrics for assessing the relation of non-CO2 and CO2 climate effects

Dahlmann, Katrin and Grewe, Volker and Niklaß, Malte (2017) Suitable climate metrics for assessing the relation of non-CO2 and CO2 climate effects. Project Report. FKZ 3717 42 509 0, 44 S. On behalf of the German Environment Agency.

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The final report of work package 1 is separated in five sections: Introduction, Climate impact, Climate metrics, Calculation methods and Alternatives. After the introduction (Section 1) aviation emissions and the impact on climate are presented. The different atmospheric processes and lifetimes of the dif-ferent emissions are shown in Section 2, as well as the different climate sensitivities and the depend-ency from emission location. At the end of this section the level of scientific understanding of the dif-ferent climate agents are presented. The third section is focussing on climate metrics. We provide a definition of climate metrics and show why they are necessary and which requirements should be met by a suitable climate metric. Afterwards, most common climate metrics (emissions, RF, GWP, GTP and ATR) are presented and advantages as well as disadvantages are discussed individually. In addition, it is shown that also the choice of time horizon and emission development play a crucial role for assessing the relation of non-CO2 and CO2 climate effects. According to the previous we recommend the ATR with a time horizon of 100 years as a suitable climate metric for emission trading or CORSIA. The fourth section is dealing with the calculation of CO2 equivalents. Three different calculation methods are presented in detail which are further investigated in the subsequent work packages: First, a simple but potentially misguiding distance dependent factor is introduced. Afterwards a (2) latitude-height-dependent factor and a (3) complex but accurate weather and spatial dependent factor are presented. By taken more atmospheric processes into account, more benefits for for climate mitigation can be created. But however, also the amount of necessary data and the effort to calculate the equivalent CO2 emissions increases. In the last section, two alternative concepts are presented which try to create a financial incentive (price based approach) or a need (regulative approach) for operator of aircraft to reduce non-CO2 effects by charging or closing highly climate-sensitive airspaces.

Item URL in elib:https://elib.dlr.de/128539/
Document Type:Monograph (Project Report)
Title:Suitable climate metrics for assessing the relation of non-CO2 and CO2 climate effects
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dahlmann, KatrinDLR, IPAhttps://orcid.org/0000-0003-3198-1713
Grewe, VolkerDLR, IPAhttps://orcid.org/0000-0002-8012-6783
Niklaß, MalteDLR, LYhttps://orcid.org/0000-0001-6760-8561
Date:November 2017
Refereed publication:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:44
Publisher:On behalf of the German Environment Agency
Keywords:non-CO2 climate effects; climate metrics; CO2 equivalent
Institution:Environmental Research of the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment, L - Air Traffic Concepts and Operation
Location: 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:25 Jul 2019 17:50
Last Modified:25 Jul 2019 17:50

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