Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles

Jantsch E, Koop T (2021)
ACS Earth and Space Chemistry 5(3): 604-617.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
Water condensation and subsequent freezing on porous aerosol particles may occur at lower saturation conditions than on particles with more planar surfaces in a process termed pore condensation and freezing. Here, we provide a thermodynamic treatment of the pore condensation and freezing process for various types of pore shapes and surface materials of different hydrophilicity and icephilicity as a function of temperature. In detail, we studied cylindrical pores and cone-shaped pores and provide a scheme for treating pores of arbitrary shape. Moreover, we analyzed the optimal conditions for the escape of nanometersized ice crystals from cylindrical pores. Finally, we show that the pores occurring in aggregates of spherical primary particles may be particularly suited to act as cloud condensation nuclei and ice nucleating particles, practically without any significant supersaturation when their surface is very hydrophilic or icephilic, respectively. This ability may have implications for the formation of water clouds and ice clouds under conditions where such aggregates exist in the atmosphere, for example, oxidized soot particles or aggregates formed by freeze-drying of water-soluble organics.
Stichworte
cloud condensation nuclei; ice nucleation; pore condensation; particle; aggregates; soot
Erscheinungsjahr
2021
Zeitschriftentitel
ACS Earth and Space Chemistry
Band
5
Ausgabe
3
Seite(n)
604-617
eISSN
2472-3452
Page URI
https://pub.uni-bielefeld.de/record/2953394

Zitieren

Jantsch E, Koop T. Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles. ACS Earth and Space Chemistry . 2021;5(3):604-617.
Jantsch, E., & Koop, T. (2021). Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles. ACS Earth and Space Chemistry , 5(3), 604-617. https://doi.org/10.1021/acsearthspacechem.0c00330
Jantsch, E., and Koop, T. (2021). Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles. ACS Earth and Space Chemistry 5, 604-617.
Jantsch, E., & Koop, T., 2021. Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles. ACS Earth and Space Chemistry , 5(3), p 604-617.
E. Jantsch and T. Koop, “Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles”, ACS Earth and Space Chemistry , vol. 5, 2021, pp. 604-617.
Jantsch, E., Koop, T.: Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles. ACS Earth and Space Chemistry . 5, 604-617 (2021).
Jantsch, Evelyn, and Koop, Thomas. “Cloud Activation via Formation of Water and Ice on Various Types of Porous Aerosol Particles”. ACS Earth and Space Chemistry 5.3 (2021): 604-617.

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