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| Titel |
The relative dispersion of cloud droplets: its robustness with respect to key cloud properties |
| VerfasserIn |
E. Tas, A. Teller, O. Altaratz, D. Axisa, R. Bruintjes, Z. Levin, I. Koren |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 4 ; Nr. 15, no. 4 (2015-02-24), S.2009-2017 |
| Datensatznummer |
250119456
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| Publikation (Nr.) |
 copernicus.org/acp-15-2009-2015.pdf |
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| Zusammenfassung |
| Flight data measured in warm convective clouds near Istanbul in June 2008
were used to investigate the relative dispersion of cloud droplet size
distribution. The relative dispersion (ϵ), defined as the ratio
between the standard deviation (σ) of the cloud droplet size
distribution and cloud droplet average radius (⟨r⟩), is
a key factor in regional and global models. The relationship between ε and
the clouds' microphysical and thermodynamic characteristics is examined. The
results show that ε is constrained with average values in the range of
~0.25–0.35. ε is shown not to be correlated with cloud droplet
concentration or liquid water content (LWC). However, ε variance is shown to be sensitive to
droplet concentration and LWC, suggesting smaller
variability of ϵ in the clouds' most adiabatic regions. A
criterion for use of in situ airborne measurement data for calculations of
statistical moments (used in bulk microphysical schemes), based on the
evaluation of ϵ, is suggested. |
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