Measurement report: Ice-nucleating particles active  ≥ −15 °C in free tropospheric air over western Europe

Abstract - 10  ∘ C (INP- 10) and - ∘ C (INP- 15) that were collected under FT conditions at the high-altitude observatory Jungfraujoch between January 2019 and March 2021. We relied on continuous radon measurements to distinguish FT conditions from those influenced by the planetary boundary layer. Median concentrations in the FT were 2.4 INP- 10 - 3 - 15 - 3 ∘ C; thus, they probably originated from certain epiphytic bacteria or fungi. Subsequent heating to 95 ∘ C deactivated another 15 % to 20 % of the initial INPs, which were likely other types of fungal INPs that might have been associated with soil organic matter or with decaying leaves. Very few INP- 10 ∘ C, but on average 20 % of INP- 15 - 10. Overall, the results suggest that aerosolised epiphytic microorganisms, or parts thereof, are responsible for the majority of primary ice formation in moderately supercooled clouds above western Europe.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Measurement report: Ice-nucleating particles active ≥ −15 °C in free tropospheric air over western Europe ; volume:22 ; number:5 ; year:2022 ; pages:3433-3444 ; extent:12 ; Atmospheric chemistry and physics ; 22, Heft 5 (2022), 3433-3444 (gesamt 12)

Contributors, Places and Time

• Creator: Conen, Franz ; Einbock, Annika ; Mignani, Claudia ; Hüglin, Christoph

Further information

• DOI: 10.5194/acp-22-3433-2022
• URN: urn:nbn:de:101:1-2022031704165114763163
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:40 AM CEST