Towards parameterising atmospheric concentrations of ice-nucleating particles active at moderate supercooling
- A small fraction of freezing cloud droplets probably initiates much of the precipitation above continents. Only a minute fraction of aerosol particles, so-called ice-nucleating particles (INPs), can trigger initial ice formation at −15 ∘C, at which cloud-top temperatures are frequently associated with snowfall. At a mountaintop site in the Swiss Alps, we found that concentrations of INPs active at −15 ∘C can be parameterised by different functions of coarse (> 2 µm) aerosol particle concentrations, depending on whether an air mass is (a) precipitating, (b) non-precipitating, or (c) carrying a substantial fraction of dust particles while non-precipitating. Consequently, we suggest that a parameterisation at moderate supercooling should consider coarse particles in combination with air mass differentiation.
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| Author: | Claudia MignaniORCiDGND, Jörg Wieder, Michael A. Sprenger, Zamin A. Kanji, Jan Henneberger, Christine Alewell, Franz Conen |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-1233219 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/123321 |
| ISSN: | 1680-7324OPAC |
| Parent Title (English): | Atmospheric Chemistry and Physics |
| Publisher: | Copernicus |
| Place of publication: | Göttingen |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2021 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2025/07/04 |
| Volume: | 21 |
| Issue: | 2 |
| First Page: | 657 |
| Last Page: | 664 |
| DOI: | https://doi.org/10.5194/acp-21-657-2021 |
| Institutes: | Fakultät für Angewandte Informatik |
| Fakultät für Angewandte Informatik / Institut für Geographie | |
| Fakultät für Angewandte Informatik / Institut für Geographie / Professur für Wasser- und Bodenressourcenforschung | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
| Licence (German): |  CC-BY 4.0: Creative Commons: Namensnennung (mit Print on Demand) |
