The chance of freezing – a conceptional  study to parameterize temperature-dependent  freezing by including randomness of  ice-nucleating particle concentrations

Frostenberg, Hannah C.; Welti, André; Luhr, Mikael; Savre, Julien; Thomson, Erik S.; Ickes, Luisa

doi:https://doi.org/10.5194/acp-23-10883-2023

Articles | Volume 23, issue 19

https://doi.org/10.5194/acp-23-10883-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-23-10883-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 19

Research article

|

05 Oct 2023

Research article |

| 05 Oct 2023

The chance of freezing – a conceptional study to parameterize temperature-dependent freezing by including randomness of ice-nucleating particle concentrations

Hannah C. Frostenberg, André Welti, Mikael Luhr, Julien Savre, Erik S. Thomson, and Luisa Ickes

Data sets

Model output from "The chance of freezing - a conceptional study to parameterize temperature-dependent freezing by including randomness of ice-nucleating particle concentrations'' H. C. Frostenberg, A. Welti, M. Luhr, J. Savre, E. S. Thomson, and L. Ickes https://doi.org/10.5281/zenodo.7572148

Model code and software

Model output from "The chance of freezing - a conceptional study to parameterize temperature-dependent freezing by including randomness of ice-nucleating particle concentrations'' H. C. Frostenberg, A. Welti, M. Luhr, J. Savre, E. S. Thomson, and L. Ickes https://doi.org/10.5281/zenodo.7572148

Short summary

Observations show that ice-nucleating particle concentrations (INPCs) have a large variety and follow lognormal distributions for a given temperature. We introduce a new immersion freezing parameterization that applies this lognormal behavior. INPCs are drawn randomly from a temperature-dependent lognormal distribution. We then show that the ice content of the modeled Arctic stratocumulus cloud is highly sensitive to the probability of drawing large INPCs.