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Effective radiative forcing of contrail cirrus

Ponater, Michael and Bickel, Marius and Bock, Lisa and Reineke, Svenja and Burkhardt, Ulrike (2017) Effective radiative forcing of contrail cirrus. 4th Internatitional Conference on Earth System Modelling, 28. Aug. - 01. Sept. 2017, Hamburg.

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Contrail cirrus is regarded to make a main contribution to aviation climate impact and is thus playing a key role for respective mitigation considerations. The stratosphere adjusted radiative forcing of line-shaped contrails has been found to have reduced efficacy in inducing a surface temperature response. Hence, stratosphere adjusted radiative forcing may be of limited value as a metric for the climate impact from contrails or from contrail cirrus. Here, we present first results from global climate model simulations designed to determine the effective radiative forcing of contrail cirrus, as effective radiative forcing is now considered as a more reliable metric. The procedure is not as straightforward as it is for impacts from well-mixed greenhouse gases, because contrail cirrus forms a spatially and temporally varying perturbation and its impact is small compared to the internal variability simulated by the model for atmospheric radiative fluxes. Yet, by means of a sophisticated modeling strategy it is shown that the effective radiative forcing of contrail cirrus is indeed significantly smaller than its stratosphere adjusted radiative forcing. Hence, the assumption of a reduced climate impact, compared with what existing radiative forcing estimates have been suggesting, is confirmed by our simulations.

Item URL in elib:https://elib.dlr.de/113884/
Document Type:Conference or Workshop Item (Poster)
Title:Effective radiative forcing of contrail cirrus
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ponater, MichaelDLR, IPAhttps://orcid.org/0000-0002-9771-4733
Bock, Lisadlr, ipahttps://orcid.org/0000-0001-7058-5938
Burkhardt, Ulrikedlr, ipahttps://orcid.org/0000-0002-0742-7176
Date:September 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:effective radiative forcing, contrail cirrus, efficacy
Event Title:4th Internatitional Conference on Earth System Modelling
Event Location:Hamburg
Event Type:international Conference
Event Dates:28. Aug. - 01. Sept. 2017
Organizer:Max-Planck-Institut für Meteorologie
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 (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Ponater, Dr.rer.nat. Michael
Deposited On:07 Sep 2017 09:17
Last Modified:31 Jul 2019 20:11

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