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Dispersion and Aging of Volcanic Aerosols After the La Soufrière Eruption in April 2021

Bruckert, J. ORCID iD icon 1; Hirsch, L.; Horváth, Á.; Kahn, R. A.; Kölling, T.; Muser, L. O. ORCID iD icon 1; Timmreck, C.; Vogel, H. ORCID iD icon 1; Wallis, S.; Hoshyaripour, G. A. ORCID iD icon 1
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)


Volcanic aerosols change the atmospheric composition and thereby affect weather and climate. Aerosol dynamic processes such as nucleation, condensation, and coagulation modify the shape, size, and mass of aerosol particles, which influence their atmospheric lifetime and radiative properties. Nevertheless, most models omit these processes for ash particles. In this work, we explore the ash aerosol aging and sulfate production during the first 4 days following the 2021 La Soufrière (St. Vincent) eruption with the ICON-ART model (ICOsahedral Nonhydrostatic model with Aerosol and Reactive Trace gases). Online coupling of ICON-ART with a one-dimensional volcanic plume model calculates volcanic emission, which makes it possible to resolve the different eruption phases of the noncontinuous La Soufrière eruption. We compared our simulated aerosol distribution and composition with observations from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument, the Multiangle Imaging SpectroRadiometer (MISR) Research Aerosol (RA) Algorithm, and the Barbados Cloud Observatory (BCO). We show that online coupling is essential to adequately model the emissions and plume development close to the volcano. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000158195
Veröffentlicht am 26.04.2023
DOI: 10.1029/2022JD037694
Zitationen: 4
Web of Science
Zitationen: 2
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.04.2023
Sprache Englisch
Identifikator ISSN: 2169-897X, 2169-8996
KITopen-ID: 1000158195
HGF-Programm 12.11.32 (POF IV, LK 01) Advancing atmospheric and Earth system models
Erschienen in Journal of Geophysical Research: Atmospheres
Verlag John Wiley and Sons
Band 128
Heft 8
Seiten Art.: e2022JD037694
Vorab online veröffentlicht am 19.04.2023
Nachgewiesen in Web of Science
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