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| Titel |
A prototype for the life cycle of a population of cold pools |
| VerfasserIn |
Fabio D'Andrea, Pierre Gentine, Jean-Yves Grandpeix, Lionel Guez |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250126995
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| Publikation (Nr.) |
 EGU/EGU2016-6804.pdf |
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| Zusammenfassung |
| A theory for the equilibrium and time dependent behavior of a population of cold pools in a domain is presented. Starting from a given downdraft mass flux, an expression is given for the lifecycle of a single cold pool, and for the collective behavior of a population of cold pools. The fundamental assumption is that the generation of cold pools behaves like a space-time Poisson process. This allows to compute a density, a radius distribution and a time of disappearance for the cold pools. Also, it is possible to derive an expression for the probability of collision of two cold pools and to estimate a distribution of probability of the length of the collision front.
The theoretical prototype is compared to statistics of cold pool lifecycle obtained from a large domain LES. Results are discussed. |
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