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Towards determining the efficacy of contrail cirrus

Ponater, Michael and Bickel, Marius and Bock, Lisa and Burkhardt, Ulrike (2020) Towards determining the efficacy of contrail cirrus. In: Making Aviation Environmentally Sustainable, 3rd ECATS conference, Book of Abstracts ECATS. pp. 52-55. ISBN 978-1-910029-58-9.

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Contrail cirrus has been emphasized as the largest individual component of aircraft climate impact, yet respective assessments are based mainly on conventional radiative forcing calculations. Recent climate model simulations have provided the first estimate of contrail cirrus effective radiative forcing (ERF), which turns out to be much smaller, by about 65%, than its conventional radiative forcing. The reason for the reduction is that natural clouds make up for a considerably lower radiative impact in the presence of contrail cirrus. ERF is generally regarded as a superior metric to indicate the efficacy of some forcing agent to induce surface temperature changes. Hence, the new result may suggest a smaller role of contrail cirrus in the context of aviation climate impact (including proposed mitigation measures) than assumed so far. However, any conclusion in this respect should be drawn carefully as long as no simulations of the global mean surface temperature response to contrail cirrus are available. As a next step, these are needed to confirm the power of ERF for assessing the efficacy of contrail cirrus.

Item URL in elib:https://elib.dlr.de/135336/
Document Type:Book Section
Title:Towards determining the efficacy of contrail cirrus
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Ponater, MichaelDLR, IPAhttps://orcid.org/0000-0002-9771-4733UNSPECIFIED
Bickel, MariusDLR, IPAhttps://orcid.org/0000-0002-7872-3706UNSPECIFIED
Bock, LisaDLR, IPAhttps://orcid.org/0000-0001-7058-5938UNSPECIFIED
Burkhardt, UlrikeDLR, IPAhttps://orcid.org/0000-0002-0742-7176UNSPECIFIED
Date:June 2020
Journal or Publication Title:Making Aviation Environmentally Sustainable, 3rd ECATS conference, Book of Abstracts
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 52-55
EditorsEmailEditor's ORCID iDORCID Put Code
Matthes, SigrunDLR, IPAhttps://orcid.org/0000-0002-5114-2418UNSPECIFIED
Keywords:Contrail Cirrus, Efficacy, Effective Radiative Forcing, Aviation Climate Impact
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
Institute of Atmospheric Physics > Earth System Model Evaluation and Analysis
Deposited By: Ponater, Dr.rer.nat. Michael
Deposited On:23 Jun 2020 12:10
Last Modified:23 Jun 2020 12:10

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