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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Jan 2022
Research article |
| 03 Jan 2022
| 03 Jan 2022
New investigations on homogeneous ice nucleation: the effects of water activity and water saturation formulations
Manuel Baumgartner
CORRESPONDING AUTHOR
Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz, Germany
Zentrum für Datenverarbeitung, Johannes Gutenberg University Mainz, Mainz, Germany
now at: Deutscher Wetterdienst, Offenbach, Germany
Christian Rolf
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research 7 – Stratosphere, Jülich, Germany
Jens-Uwe Grooß
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research 7 – Stratosphere, Jülich, Germany
Julia Schneider
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Tobias Schorr
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Ottmar Möhler
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Peter Spichtinger
Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz, Germany
Martina Krämer
Institute for Atmospheric Physics, Johannes Gutenberg University Mainz, Mainz, Germany
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research 7 – Stratosphere, Jülich, Germany
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Cited
11 citations as recorded by crossref.
- A Lagrangian Perspective of Microphysical Impact on Ice Cloud Evolution and Radiative Heating S. Sullivan et al. 10.1029/2022MS003226
- The dehydration carousel of stratospheric water vapor in the Asian summer monsoon anticyclone P. Konopka et al. 10.5194/acp-23-12935-2023
- A simple model to assess the impact of gravity waves on ice-crystal populations in the tropical tropopause layer M. Corcos et al. 10.5194/acp-23-6923-2023
- Study of optical scattering properties and direct radiative effects of high-altitude cirrus clouds in Barcelona, Spain, with 4 years of lidar measurements C. Gil-Díaz et al. 10.5194/acp-25-3445-2025
- Homogeneous Freezing Events Sampled in the Tropical Tropopause Layer E. Jensen et al. 10.1029/2022JD036535
- The Mission Support System (MSS v7.0.4) and its use in planning for the SouthTRAC aircraft campaign R. Bauer et al. 10.5194/gmd-15-8983-2022
- Ice fog observed at cirrus temperatures at Dome C, Antarctic Plateau É. Vignon et al. 10.5194/acp-22-12857-2022
- Impacts of Cloud‐Processing on Ice Nucleation of Soot Particles Internally Mixed With Sulfate and Organics K. Gao & Z. Kanji 10.1029/2022JD037146
- Impact of formulations of the homogeneous nucleation rate on ice nucleation events in cirrus P. Spichtinger et al. 10.5194/acp-23-2035-2023
- Experimental Determination of the Relationship Between Organic Aerosol Viscosity and Ice Nucleation at Upper Free Tropospheric Conditions S. Kasparoglu et al. 10.1029/2021JD036296
- Water Supersaturation for Early Mars A. Delavois et al. 10.1029/2022JE007424
11 citations as recorded by crossref.
- A Lagrangian Perspective of Microphysical Impact on Ice Cloud Evolution and Radiative Heating S. Sullivan et al. 10.1029/2022MS003226
- The dehydration carousel of stratospheric water vapor in the Asian summer monsoon anticyclone P. Konopka et al. 10.5194/acp-23-12935-2023
- A simple model to assess the impact of gravity waves on ice-crystal populations in the tropical tropopause layer M. Corcos et al. 10.5194/acp-23-6923-2023
- Study of optical scattering properties and direct radiative effects of high-altitude cirrus clouds in Barcelona, Spain, with 4 years of lidar measurements C. Gil-Díaz et al. 10.5194/acp-25-3445-2025
- Homogeneous Freezing Events Sampled in the Tropical Tropopause Layer E. Jensen et al. 10.1029/2022JD036535
- The Mission Support System (MSS v7.0.4) and its use in planning for the SouthTRAC aircraft campaign R. Bauer et al. 10.5194/gmd-15-8983-2022
- Ice fog observed at cirrus temperatures at Dome C, Antarctic Plateau É. Vignon et al. 10.5194/acp-22-12857-2022
- Impacts of Cloud‐Processing on Ice Nucleation of Soot Particles Internally Mixed With Sulfate and Organics K. Gao & Z. Kanji 10.1029/2022JD037146
- Impact of formulations of the homogeneous nucleation rate on ice nucleation events in cirrus P. Spichtinger et al. 10.5194/acp-23-2035-2023
- Experimental Determination of the Relationship Between Organic Aerosol Viscosity and Ice Nucleation at Upper Free Tropospheric Conditions S. Kasparoglu et al. 10.1029/2021JD036296
- Water Supersaturation for Early Mars A. Delavois et al. 10.1029/2022JE007424
Latest update: 17 May 2025
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.
An important mechanism for the appearance of ice particles in the upper troposphere at low...
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