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Statistics of potential radiative forcing of persistent contrails

Gierens, Klaus Martin (2018) Statistics of potential radiative forcing of persistent contrails. [Other]

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Abstract

Contrails affect climate if they are persistent, that is, if they are located in an ice-supersaturated region (ISSR). They do this by reflecting sunlight back to space (cooling) and by blocking thermal radiation from the Earth surface and lower atmosphere (warming). During night, there is always net warming since sunlight and thus it’s possible reflection is absent. In most (daytime) cases there is substantial cancellation of the warming and cooling effects, but occasionally (in particular during night) the long-wave warming effect dominates such that the respective contrail has a particularly strong contribution to climate warming. This is a Big Hit, and such contrails should be avoided already in the flight planning phase. Such an avoidance strategy needs of course a reliable prediction of the conditions under which contrails actually are that strong climate warmers. The topic of this presentation is how situations with strong warming contrails can be characterised and whether and how reliably it is possible to predict them.

Item URL in elib:https://elib.dlr.de/148570/
Document Type:Other
Additional Information:Diese Arbeit wurde im Rahmen einer informellen Arbeitsgruppe "Contrail Avoidance Group" der Greener by Design Initiative der Royal Aeronautical Society erstellt. Die Ergebnisse wurden am 9. Okt. 2018 bei einem Workshop in Gatwick vorgetragen.
Title:Statistics of potential radiative forcing of persistent contrails
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gierens, Klaus MartinDLR, IPAhttps://orcid.org/0000-0001-6983-5370
Date:October 2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:14
Status:Published
Keywords:Contrails, climate impact, Big Hit, flight planning, weather prediction
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
Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Gierens, Dr.rer.nat. Klaus Martin
Deposited On:01 Feb 2022 11:33
Last Modified:01 Feb 2022 11:33

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