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The impact of aerosols and model grid spacing on a supercell storm from Swabian MOSES 2021

Barthlott, Christian ORCID iD icon 1,2; Czajka, Beata 1,2; Kunz, Michael ORCID iD icon 1,2; Saathoff, Harald ORCID iD icon 2,3; Zhang, Hengheng ORCID iD icon 2,3; Böhmländer, Alexander ORCID iD icon 2,3; Gasch, Philipp 1,2; Handwerker, Jan 1,2; Kohler, Martin 1,2; Wilhelm, Jannik 1,2; Wieser, Andreas 1,2; Hoose, Corinna ORCID iD icon 1,2
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
3 Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF), Karlsruher Institut für Technologie (KIT)

Abstract:

The supercell storm that occurred in southwestern Germany on June 23, 2021, had an exceptionally long lifetime of 7.5 hr, travelled a distance of nearly 190 km, and produced large amounts of hail. During that summer, the Swabian MOSES field campaign was held in that area, and several hydro-meteorological measurements are available, as the storm passed directly over the main observation site. We present hindcasts of this event with the Icosahedral Non-hydrostatic model using two horizontal grid spacings (i.e., 2 km, 1 km) with a single-moment and an advanced double-moment microphysics scheme. Numerical results show that all 2 km model realizations do not simulate convective precipitation at the correct location and time. For the 1 km grid spacing, changes in aerosol concentration resulted in large changes in convective precipitation. Only the 1 km run assuming a low cloud condensation nuclei (CCNs) concentration is able to realistically capture the storm, whereas no supercell is simulated in the more polluted scenarios. Observed aerosol particle concentrations indicate that CCNs values were the lowest of the month, which suggests that the low aerosol concentration is a reasonable assumption. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000169591
Veröffentlicht am 26.03.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung (IMK)
Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF)
Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Troposphärische Messkampagnen und Modellentwicklung (IMKTRO-T)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 0035-9009, 1477-870X
KITopen-ID: 1000169591
HGF-Programm 12.11.26 (POF IV, LK 01) Aerosol-Cloud-Climate-Interaction
Erschienen in Quarterly Journal of the Royal Meteorological Society
Verlag John Wiley and Sons
Band 150
Heft 761
Seiten 2005-2027
Vorab online veröffentlicht am 18.03.2024
Schlagwörter aerosol–cloud interactions, convection, cloud condensation nuclei, ICON model, supercell storm
Nachgewiesen in Web of Science
Dimensions
Scopus
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