Articles | Volume 22, issue 10
https://doi.org/10.5194/acp-22-6717-2022
https://doi.org/10.5194/acp-22-6717-2022
Research article
 | 
24 May 2022
Research article |  | 24 May 2022

Time dependence of heterogeneous ice nucleation by ambient aerosols: laboratory observations and a formulation for models

Jonas K. F. Jakobsson, Deepak B. Waman, Vaughan T. J. Phillips, and Thomas Bjerring Kristensen

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Cited articles

Alpert, P. A. and Knopf, D. A.: Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model, Atmos. Chem. Phys., 16, 2083–2107, https://doi.org/10.5194/acp-16-2083-2016, 2016. 
Beydoun, H., Polen, M., and Sullivan, R. C.: Effect of particle surface area on ice active site densities retrieved from droplet freezing spectra, Atmos. Chem. Phys., 16, 13359–13378, https://doi.org/10.5194/acp-16-13359-2016, 2016. 
Bigg, E. K.: The supercooling of water, P. Phys. Soc. B, 66, 688–694, 1953a. 
Bigg, E. K.: The formation of atmospheric ice crystals by the freezing of droplets, Q. J. Roy. Meteorol. Soc., 79, 510–519, 1953b. 
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Short summary
Long-lived cold-layer clouds at subzero temperatures are observed to be remarkably persistent in their generation of ice particles and snow precipitation. There is uncertainty about why this is so. This motivates the present lab study to observe the long-term ice-nucleating ability of aerosol samples from the real troposphere. Time dependence of their ice nucleation is observed to be weak in lab experiments exposing the samples to isothermal conditions for up to about 10 h.
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