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

James, Rachel L.; Phillips, Vaughan T. J.; Connolly, Paul J.

doi:https://doi.org/10.5194/acp-21-18519-2021

Articles | Volume 21, issue 24

https://doi.org/10.5194/acp-21-18519-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-21-18519-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 24

Research article

| Highlight paper

|

21 Dec 2021

Research article | Highlight paper |

| 21 Dec 2021

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

Rachel L. James, Vaughan T. J. Phillips, and Paul J. Connolly

Video supplement

Secondary ice production during the break-up of freezing water drops on impact with ice particles Rachel L. James, Vaughan T. J. Phillips and Paul J. Connolly https://figshare.com/s/a55a8eb38872c4c46020

Short summary

Secondary ice production (SIP) plays an important role in ice formation within mixed-phase clouds. We present a laboratory investigation of a potentially new SIP mechanism involving the collisions of supercooled water drops with ice particles. At impact, the supercooled water drop fragments form smaller secondary drops. Approximately 30 % of the secondary drops formed during the retraction phase of the supercooled water drop impact freeze over a temperature range of −4 °C to −12 °C.