Overview of Ice Nucleating Particles
Zamin A. Kanji,Luis A. Ladino,Heike Wex,Yvonne Boose,Monika Burkert-Kohn,Daniel J. Cziczo,Martina Krämer +6 more
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TLDR
In this paper, new developments in identifying the heterogeneous freezing mechanisms, atmospheric relevance, uncertainties, and unknowns about ice nucleating particles (INPs) have been described, and the change in conventional wisdom regarding the requirements of INPs as new studies discover physical and chemical properties of these particles is explained.Abstract:
Ice particle formation in tropospheric clouds significantly changes cloud radiative and microphysical properties. Ice nucleation in the troposphere via homogeneous freezing occurs at temperatures lower than −38°C and relative humidity with respect to ice above 140%. In the absence of these conditions, ice formation can proceed via heterogeneous nucleation aided by aerosol particles known as ice nucleating particles (INPs). In this chapter, new developments in identifying the heterogeneous freezing mechanisms, atmospheric relevance, uncertainties, and unknowns about INPs are described. The change in conventional wisdom regarding the requirements of INPs as new studies discover physical and chemical properties of these particles is explained. INP sources and known reasons for their ice nucleating properties are presented. The need for more studies to systematically identify particle properties that facilitate ice nucleation is highlighted. The atmospheric relevance of long-range transport, aerosol a...read more
Citations
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