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Secondary ice production during the break-up of freezing water drops on impact with ice particles

James, Rachel L. ; Phillips, Vaughan T.J. LU orcid and Connolly, Paul J. (2021) In Atmospheric Chemistry and Physics 21(24). p.18519-18530
Abstract

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,... (More)

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.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Atmospheric Chemistry and Physics
volume
21
issue
24
pages
12 pages
publisher
Copernicus GmbH
external identifiers
  • scopus:85121998943
ISSN
1680-7316
DOI
10.5194/acp-21-18519-2021
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 Rachel L. James et al.
id
582e009d-39bd-4038-bbbb-34020951049c
date added to LUP
2022-01-27 18:27:41
date last changed
2023-02-21 10:43:51
@article{582e009d-39bd-4038-bbbb-34020951049c,
  abstract     = {{<p>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 &gt;-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 &gt;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. </p>}},
  author       = {{James, Rachel L. and Phillips, Vaughan T.J. and Connolly, Paul J.}},
  issn         = {{1680-7316}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{24}},
  pages        = {{18519--18530}},
  publisher    = {{Copernicus GmbH}},
  series       = {{Atmospheric Chemistry and Physics}},
  title        = {{Secondary ice production during the break-up of freezing water drops on impact with ice particles}},
  url          = {{http://dx.doi.org/10.5194/acp-21-18519-2021}},
  doi          = {{10.5194/acp-21-18519-2021}},
  volume       = {{21}},
  year         = {{2021}},
}