Print Email Facebook Twitter Properties and Processing of Aviation Exhaust Aerosol at Cruise Altitude Observed from the IAGOS-CARIBIC Flying Laboratory Title Properties and Processing of Aviation Exhaust Aerosol at Cruise Altitude Observed from the IAGOS-CARIBIC Flying Laboratory Author Mahnke, Christoph (Forschungszentrum Jülich GmbH) Gomes, Rita (Forschungszentrum Jülich GmbH) Bundke, Ulrich (Forschungszentrum Jülich GmbH) Berg, Marcel (Forschungszentrum Jülich GmbH) Ziereis, Helmut (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)) Sharma, M. (TU Delft Aircraft Noise and Climate Effects; Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)) Righi, Mattia (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)) Hendricks, Johannes (Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)) Zahn, Andreas (Karlsruhe Institut für Technologie) Date 2024 Abstract 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. Subject aerosol particleaircraft exhaustaircraft plumeaviation aerosolaviation sootIAGOS-CARIBICparticle emission indexplume detection To reference this document use: http://resolver.tudelft.nl/uuid:07e0d7f8-9c7d-4ad3-8428-1a220ace4b14 DOI https://doi.org/10.1021/acs.est.3c09728 ISSN 0013-936X Source Environmental Science & Technology (Washington), 58 (16), 6945-6953 Part of collection Institutional Repository Document type journal article Rights © 2024 Christoph Mahnke, Rita Gomes, Ulrich Bundke, Marcel Berg, Helmut Ziereis, M. Sharma, Mattia Righi, Johannes Hendricks, Andreas Zahn, More Authors Files PDF mahnke-et-al-2024-propert ... -iagos.pdf 3.89 MB Close viewer /islandora/object/uuid:07e0d7f8-9c7d-4ad3-8428-1a220ace4b14/datastream/OBJ/view