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| Titel |
A spectral model for turbulence and microphysics dynamics in an ice cloud |
| VerfasserIn |
A. J. Palmer |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 3, no. 1 ; Nr. 3, no. 1, S.23-28 |
| Datensatznummer |
250000700
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| Publikation (Nr.) |
 copernicus.org/npg-3-23-1996.pdf |
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| Zusammenfassung |
| A one-dimensional, nine-mode
spectral model for
temperature, velocity, and the mixing ratios of
suspended and
precipitating ice-particle components is shown
to be
consistent with ice-cloud observations. The
observations
include Doppler radar time-series measurements of a
single
winter ice cloud and direct measurements of mean
particle size
vs. icewater content for a set of ice clouds. Fitting
of the
model to the Doppler vertical-velocity measurements
allows a
prediction to be made of the vertical scale and
turbulent
Prandtl number active in the ice-cloud vertical
motions. The
model is then used to explore the question of how
turbulence
and gravity-wave motions affect the microphysical
properties
of an ice cloud. The model predicts interesting
dynamical
effects on the mixing ratios due to these motions,
but no
significant effects on the time-averaged
microphysical
quantities. |
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