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| Titel |
Experiments in the use of stochastic scaling in moist physics parameterizations for models of the atmospheric -5/3 range |
| VerfasserIn |
Joseph Tribbia |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250107761
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| Publikation (Nr.) |
 EGU/EGU2015-7474.pdf |
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| Zusammenfassung |
| The problem of parameterization of physical process in large scale numerical
models of the atmosphere has until recently focused upon modeling
the 'average' or mean tendencies and the models developed for the average
tendencies have been almost exclusively developed from idealized process
models. Sub-grid physical processes have made little use of the observed
spatial scaling structure in atmospheric turbulence in the development of
parameterizations. This is complicated by the observation that the atmosphere
has two distinct scaling ranges: -3 for planetary to synoptic wave numbers and
-5/3 for mesoscale wave numbers and beyond.
I will describe some efforts and strategies aimed at moving beyond the use
of averaged process models for the computation of the sub-grid tendencies
due to sub-grid effects of moist processes (precipitation and clouds).
Stochastic fractal interpolation will be used to refine coarsely resolved
field variables important for moist processes in order to investigate whether
moist physics is necessary to explain the existence of the Nastrom-Gage -5/3
spectral range in atmospheric Kinetic energy or merely amplifies and maintains
this spectrum in the atmospheric mesoscale and beyond. |
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