Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 14, issue 23
Articles | Volume 14, issue 23
https://doi.org/10.5194/acp-14-13013-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-14-13013-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 14, issue 23
Research article
 | 
09 Dec 2014
Research article |  | 09 Dec 2014

Rare temperature histories and cirrus ice number density in a parcel and a one-dimensional model

D. M. Murphy

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Short summary
The properties of cirrus clouds depend on the rate at which air cools as the cloud forms. Small-scale motions in the atmosphere have high rates of cooling. This usually leads to very small ice crystals. However, a few random cooling fluctuations will produce only a few ice crystals. This paper shows that these events are important even if they are rare: they lead to particles that sediment and influence a lot of air. The results show dehydration is less sensitive to details of ice nucleation.
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