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| Titel |
Including the sub-grid scale plume rise of vegetation fires in low resolution atmospheric transport models |
| VerfasserIn |
S. R. Freitas, K. M. Longo, R. Chatfield, D. Latham, M. A. F. Silva Dias, M. O. Andreae, E. Prins, J. C. Santos, R. Gielow, J. A. Carvalho |
| 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 ; 7, no. 13 ; Nr. 7, no. 13 (2007-07-02), S.3385-3398 |
| Datensatznummer |
250005112
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| Publikation (Nr.) |
 copernicus.org/acp-7-3385-2007.pdf |
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| Zusammenfassung |
| We describe and begin to evaluate a parameterization to include the vertical
transport of hot gases and particles emitted from biomass burning in low
resolution atmospheric-chemistry transport models. This sub-grid transport
mechanism is simulated by embedding a 1-D cloud-resolving model with
appropriate lower boundary conditions in each column of the 3-D host model.
Through assimilation of remote sensing fire products, we recognize which
columns have fires. Using a land use dataset appropriate fire properties are
selected. The host model provides the environmental conditions, allowing the
plume rise to be simulated explicitly. The derived height of the plume is
then used in the source emission field of the host model to determine the
effective injection height, releasing the material emitted during the flaming
phase at this height. Model results are compared with CO aircraft profiles
from an Amazon basin field campaign and with satellite data, showing the huge
impact that this mechanism has on model performance. We also show the
relative role of each main vertical transport mechanisms, shallow and deep
moist convection and the pyro-convection (dry or moist) induced by vegetation
fires, on the distribution of biomass burning CO emissions in the
troposphere. |
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