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Properties and Processing of Aviation Exhaust Aerosol at Cruise Altitude Observed from the IAGOS-CARIBIC Flying Laboratory

Mahnke, Christoph and Gomes, Rita and Bundke, Ulrich and Berg, Marcel and Ziereis, Helmut and Sharma, Monica and Righi, Mattia and Hendricks, Johannes and Zahn, Andreas and Wahner, Andreas and Petzold, Andreas (2024) Properties and Processing of Aviation Exhaust Aerosol at Cruise Altitude Observed from the IAGOS-CARIBIC Flying Laboratory. Environmental Science & Technology. American Chemical society (ACS). doi: 10.1021/acs.est.3c09728. ISSN 0013-936X.

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Official URL: https://dx.doi.org/10.1021/acs.est.3c09728


The characteristics of aviation-induced aerosol, its processing, and effects on cirrus clouds and climate are still associated with large uncertainties. Properties of aviation-induced aerosol, however, are crucially needed for the assessment of aviation’s climate impacts today and in the future. We identified more than 1100 aircraft plume encounters during passenger aircraft flights of the IAGOS-CARIBIC Flying Laboratory from July 2018 to March 2020. The aerosol properties inside aircraft plumes were similar, independent of the altitude (i.e., upper troposphere, tropopause region, and lowermost stratosphere). The exhaust aerosol was found to be mostly externally mixed compared to the internally mixed background aerosol, even at a plume age of 1 to 3 h. No enhancement of accumulation mode particles (diameter >250 nm) could be detected inside the aircraft plumes. Particle number emission indices (EIs) deduced from the observations in aged plumes are in the same range as values reported from engine certifications. This finding, together with the observed external mixing state inside the plumes, indicates that the aviation exhaust aerosol almost remains in its emission state during plume expansion. It also reveals that the particle number EIs used in global models are within the range of the EIs measured in aged plumes.

Item URL in elib:https://elib.dlr.de/203639/
Document Type:Article
Title:Properties and Processing of Aviation Exhaust Aerosol at Cruise Altitude Observed from the IAGOS-CARIBIC Flying Laboratory
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Mahnke, ChristophFZ Jülich, Jülich, Germanyhttps://orcid.org/0000-0003-2606-1680UNSPECIFIED
Gomes, RitaFZ Jülich, Jülich, GermanyUNSPECIFIEDUNSPECIFIED
Bundke, UlrichFZ Jülich, Jülich, Germanyhttps://orcid.org/0000-0001-5484-8099UNSPECIFIED
Berg, MarcelFZ Jülich, Jülich, GermanyUNSPECIFIEDUNSPECIFIED
Ziereis, HelmutDLR, IPAhttps://orcid.org/0000-0001-5483-5669UNSPECIFIED
Righi, MattiaDLR, IPAhttps://orcid.org/0000-0003-3827-5950UNSPECIFIED
Wahner, AndreasForschungzentrum Jülich, JülichUNSPECIFIEDUNSPECIFIED
Petzold, AndreasFZ Jülich, Jülich, Germanyhttps://orcid.org/0000-0002-2504-1680UNSPECIFIED
Journal or Publication Title:Environmental Science & Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Publisher:American Chemical society (ACS)
Keywords:Aviation, exhaust, IAGOS-CARIBIC
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 > Atmospheric Trace Species
Deposited By: Ziereis, Helmut
Deposited On:10 Apr 2024 11:26
Last Modified:10 Apr 2024 11:26

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