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Preprints
https://doi.org/10.5194/acp-2020-537
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-537
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: review article 22 Jun 2020

Submitted as: review article | 22 Jun 2020

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This preprint is currently under review for the journal ACP.

Review of experimental studies on secondary ice production

Alexei Korolev1 and Thomas Leisner2 Alexei Korolev and Thomas Leisner
  • 1Environment and Climate Change Canada, Canada
  • 2Karlsruhe Instituteof Technology, Karlsruhe, Germany

Abstract. Secondary ice production (SIP) plays a key role in the formation of ice particles in tropospheric clouds. Future improvement of the accuracy of the weather predictions and climate models relies on a proper description of SIP in numerical simulations. For now, laboratory studies remain a primary tool for developing physically based parameterizations for cloud modeling. Over the past seven decades, six different SIP-identifying mechanisms have emerged: (1) shattering during droplet freezing; (2) the rime splintering (Hallett-Mossop) process; (3) fragmentation due to ice-ice collision; (4) ice particle fragmentation due to thermal shock; (5) fragmentation of sublimating ice; (6) activation of ice nucleating particles in transient supersaturation around freezing drops. This work presents a critical review of the laboratory studies related to secondary ice production. While some of the six mechanisms have received little research attention, others consist of contradictory results obtained by different research groups. Unfortunately, despite past investigative efforts, the lack of consistency and the gaps in the accumulated knowledge hinder the development of quantitative descriptions of any of the six SIP mechanisms. The present work is aimed at identifying gaps in our knowledge on SIP and on stimulating further laboratory studies in obtaining a quantitative description of efficiencies for each of SIP mechanism.

Alexei Korolev and Thomas Leisner

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Status: open (until 17 Aug 2020)
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Alexei Korolev and Thomas Leisner

Alexei Korolev and Thomas Leisner

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