New investigations on homogeneous ice  nucleation: the effects of water activity  and water saturation formulations

Baumgartner, Manuel; Rolf, Christian; Grooß, Jens-Uwe; Schneider, Julia; Schorr, Tobias; Möhler, Ottmar; Spichtinger, Peter; Krämer, Martina

doi:https://doi.org/10.5194/acp-22-65-2022

Articles | Volume 22, issue 1

https://doi.org/10.5194/acp-22-65-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-22-65-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 22, issue 1

Research article

|

03 Jan 2022

Research article |

| 03 Jan 2022

New investigations on homogeneous ice nucleation: the effects of water activity and water saturation formulations

Manuel Baumgartner, Christian Rolf, Jens-Uwe Grooß, Julia Schneider, Tobias Schorr, Ottmar Möhler, Peter Spichtinger, and Martina Krämer

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Final revised paper (published on 03 Jan 2022)
Preprint (discussion started on 21 Apr 2021)

Interactive discussion

Status: closed

RC1:
'Comment on acp-2021-320', Anonymous Referee #1, 17 Jul 2021

See attached PDF file.

Citation: https://doi.org/10.5194/acp-2021-320-RC1
- RC2:
  'Reply on RC1', Anonymous Referee #1, 17 Jul 2021
  
  I will just correct a typing error in the review. I meant to write "preferential evaporation of the smaller cloud-droplets" (instead of "freezing").
  
  Citation: https://doi.org/10.5194/acp-2021-320-RC2
  - AC1: 'Response to Reviewer Comments', Manuel Baumgartner, 11 Oct 2021
    
    Please find our responses to the reviewer comments in the attached file.
    
    Citation: https://doi.org/10.5194/acp-2021-320-AC1
- AC1: 'Response to Reviewer Comments', Manuel Baumgartner, 11 Oct 2021
  
  Please find our responses to the reviewer comments in the attached file.
  
  Citation: https://doi.org/10.5194/acp-2021-320-AC1
RC3:
'Comment on acp-2021-320', Anonymous Referee #2, 26 Jul 2021

See the attached supplement.

Citation: https://doi.org/10.5194/acp-2021-320-RC3
- AC1: 'Response to Reviewer Comments', Manuel Baumgartner, 11 Oct 2021
  
  Please find our responses to the reviewer comments in the attached file.
  
  Citation: https://doi.org/10.5194/acp-2021-320-AC1
AC1: 'Response to Reviewer Comments', Manuel Baumgartner, 11 Oct 2021

Please find our responses to the reviewer comments in the attached file.

Citation: https://doi.org/10.5194/acp-2021-320-AC1

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Manuel Baumgartner on behalf of the Authors (11 Oct 2021) Author's response Author's tracked changes Manuscript

ED: Referee Nomination & Report Request started (02 Nov 2021) by Susannah Burrows

RR by Anonymous Referee #1 (13 Nov 2021)

RR by Anonymous Referee #2 (14 Nov 2021)

ED: Publish as is (24 Nov 2021) by Susannah Burrows

Short summary

An important mechanism for the appearance of ice particles in the upper troposphere at low temperatures is homogeneous nucleation. This process is commonly described by the Koop line, predicting the humidity at freezing. However, laboratory measurements suggest that the freezing humidities are above the Koop line, motivating the present study to investigate the influence of different physical parameterizations on the homogeneous freezing with the help of a detailed numerical model.