Articles | Volume 21, issue 1
Atmos. Chem. Phys., 21, 561–575, 2021
https://doi.org/10.5194/acp-21-561-2021
Atmos. Chem. Phys., 21, 561–575, 2021
https://doi.org/10.5194/acp-21-561-2021

Research article 15 Jan 2021

Research article | 15 Jan 2021

On the ice-nucleating potential of warm hydrometeors in mixed-phase clouds

Michael Krayer et al.

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Cited articles

Al-Naimi, R. and Saunders, C. P. R.: Measurements of Natural Deposition and Condensation-Freezing Ice Nuclei with a Continuous Flow Chamber, Atmos. Environ., 19, 1871–1882, https://doi.org/10.1016/0004-6981(85)90012-5, 1985. a
Auer, A. H., Veal, D. L., and Marwitz, J. D.: Observations of Ice Crystal and Ice Nuclei Concentrations in Stable Cap Clouds, J. Atmos. Sci., 26, 1342–1343, https://doi.org/10.1175/1520-0469(1969)026<1342:OOICAI>2.0.CO;2, 1969. a
Bacon, N. J., Swanson, B. D., Baker, M. B., and Davis, E. J.: Breakup of Levitated Frost Particles, J. Geophys. Res.-Atmos., 103, 13763–13775, https://doi.org/10.1029/98JD01162, 1998. a
Bagchi, P. and Kottam, K.: Effect of Freestream Isotropic Turbulence on Heat Transfer from a Sphere, Phys. Fluids, 20, 073305, https://doi.org/10.1063/1.2963138, 2008. a
Bagchi, P., Ha, M. Y., and Balachandar, S.: Direct Numerical Simulation of Flow and Heat Transfer From a Sphere in a Uniform Cross-Flow, J. Fluids Eng., 123, 347–358, https://doi.org/10.1115/1.1358844, 2001. a
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We address the phenomenon of ice enhancement in the vicinity of warm hydrometeors using highly accurate flow simulation techniques. It is found that the transiently supersaturated zones induced by the hydrometeor's wake are by far larger than what has been previously estimated. The ice enhancement is quantified on the micro- and macroscale, and its relevance is discussed. The results provided may contribute to a (currently unavailable) parametrization of the phenomenon.
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