Articles | Volume 23, issue 12
https://doi.org/10.5194/acp-23-7033-2023
https://doi.org/10.5194/acp-23-7033-2023
Research article
 | 
26 Jun 2023
Research article |  | 26 Jun 2023

Large-eddy simulation of a two-layer boundary-layer cloud system from the Arctic Ocean 2018 expedition

Ines Bulatovic, Julien Savre, Michael Tjernström, Caroline Leck, and Annica M. L. Ekman

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Subject: Clouds and Precipitation | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Ackerman, A. S., Kirkpatrick, M. P., Stevens, D. E., and Toon, O. B.: The impact of humidity above stratiform clouds on indirect aerosol climate forcing, Nature, 432, 1014–1017, https://doi.org/10.1038/nature03174, 2004. 
Bergeron, T.: On the physics of clouds and precipitation. Proces Verbaux de l'Association de Météorologie, International Union of Geodesy and Geophysics, 156–178, 1935. 
Bigg, E. K. and Leck, C.: Cloud-active particles over the central Arctic ocean, J. Geophys. Res., 106, 32155–32166, https://doi.org/10.1029/1999JD901152, 2001. 
Bigg, E. K., Leck, C., and Nilsson, E. D.: Sudden changes in arctic atmospheric aerosol concentrations during summer and autumn, Tellus B, 48, 254–271, 1996. 
Bigg, E. K., Leck, C., and Nilsson, E. D.: Sudden Changes in Aerosol and Gas concentrations in the central Arctic Marine Boundary Layer – Causes and Consequences, J. Geophys. Res., 106, 32167–32185, https://doi.org/10.1029/2000jd900753, 2001. 
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We use numerical modeling with detailed cloud microphysics to investigate a low-altitude cloud system consisting of two cloud layers – a type of cloud situation which was commonly observed during the summer of 2018 in the central Arctic (north of 80° N). The model generally reproduces the observed cloud layers and the thermodynamic structure of the lower atmosphere well. The cloud system is maintained unless there are low aerosol number concentrations or high large-scale wind speeds.
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