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| Titel |
Ship plume dispersion rates in convective boundary layers for chemistry models |
| VerfasserIn |
F. Chosson, R. Paoli, B. Cuenot |
| 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 ; 8, no. 16 ; Nr. 8, no. 16 (2008-08-21), S.4841-4853 |
| Datensatznummer |
250006336
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| Publikation (Nr.) |
 copernicus.org/acp-8-4841-2008.pdf |
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| Zusammenfassung |
| Detailed ship plume simulations in various convective boundary layer
situations have been performed using a Lagrangian Dispersion Model driven by
a Large Eddy Simulation Model. The simulations focus on the early stage (1–2 h)
of plume dispersion regime and take into account the effects of plume
rise on dispersion. Results are presented in an attempt to provide to
atmospheric chemistry modellers a realistic description of characteristic
dispersion impact on exhaust ship plume chemistry. Plume dispersion
simulations are used to derive analytical dilution rate functions. Even
though results exhibit striking effects of plume rise parameter on
dispersion patterns, it is shown that initial buoyancy fluxes at ship stack
have a minor effect on plume dilution rate. After initial high dispersion
regimes a simple characteristic dilution time scale can be used to
parameterize the subgrid plume dilution effect in large-scale chemistry
models. The results show that this parameter is directly related to the
typical turn-over time scale of the convective boundary layer. |
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