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Susceptibility of contrail ice crystal numbers to aircraft soot particle emissions

Kärcher, Bernd and Voigt, Christiane (2017) Susceptibility of contrail ice crystal numbers to aircraft soot particle emissions. Geophysical Research Letters, pp. 1-10. Wiley. DOI: 10.1002/2017GL074949 ISSN 0094-8276

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Abstract

We develop an idealized, physically based model describing combined effects of ice nucleation and sublimation on ice crystal number during persistent contrail formation. Our study represents the first effort to predict ice numbers at the point where contrails transition into contrail cirrus—several minutes past formation—by connecting them to aircraft soot particle emissions and atmospheric supersaturation with respect to ice. Results averaged over an observed exponential distribution of ice supersaturation (mean value 15%) indicate that large reductions in soot particle numbers are needed to lower contrail ice crystal numbers significantly for soot emission indices around 1015 (kg fuel)−1, because reductions in nucleated ice number are partially compensated by sublimation losses. Variations in soot particle (−50%) and water vapor (+10%) emission indices at threefold lower soot emissions resulting from biofuel blending cause ice crystal numbers to change by −35% and <5%, respectively.

Item URL in elib:https://elib.dlr.de/113992/
Document Type:Article
Title:Susceptibility of contrail ice crystal numbers to aircraft soot particle emissions
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kärcher, BerndDLR, IPAhttps://orcid.org/0000-0003-0278-4980
Voigt, Christianedlr, ipahttps://orcid.org/0000-0001-8925-7731
Date:12 August 2017
Journal or Publication Title:Geophysical Research Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1002/2017GL074949
Page Range:pp. 1-10
Publisher:Wiley
ISSN:0094-8276
Status:Published
Keywords:Contrail formation, climate, mitigation
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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Cloud Physics
Deposited By: Kärcher, Prof. Bernd
Deposited On:13 Sep 2017 08:27
Last Modified:31 Jul 2019 20:11

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