Vaughan Phillips
Research in the Area of Clouds, Aerosols and Climate
Secondary ice production during the break-up of freezing water drops on impact with ice particles
Author
Summary, in English
We provide the first dedicated laboratory study of collisions of supercooled water drops with ice particles as a secondary ice production mechanism. We experimentally investigated collisions of supercooled water drops (∼5 mm in diameter) with ice particles of a similar size (∼6 mm in diameter) placed on a glass slide at temperatures >-12 °C. Our results showed that secondary drops were generated during both the spreading and retraction phase of the supercooled water drop impact. The secondary drops generated during the spreading phase were emitted too fast to quantify. However, quantification of the secondary drops generated during the retraction phase with diameters >0.1 mm showed that 5-10 secondary drops formed per collision, with approximately 30 % of the secondary drops freezing over a temperature range between-4 and-12 ° C. Our results suggest that this secondary ice production mechanism may be significant for ice formation in atmospheric clouds containing large supercooled drops and ice particles.
Department/s
- Dept of Physical Geography and Ecosystem Science
- MERGE: ModElling the Regional and Global Earth system
Publishing year
2021-12-21
Language
English
Pages
18519-18530
Publication/Series
Atmospheric Chemistry and Physics
Volume
21
Issue
24
Document type
Journal article
Publisher
Copernicus GmbH
Topic
- Meteorology and Atmospheric Sciences
Status
Published
ISBN/ISSN/Other
- ISSN: 1680-7316