 |
| Titel |
Applicability of an integrated plume rise model for the dispersion from wild-land fires |
| VerfasserIn |
J. Kukkonen, J. Nikmo, M. Sofiev, K. Riikonen, T. Petäjä, A. Virkkula, J. Levula, S. Schobesberger, D. M. Webber |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1991-959X
|
| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 6 ; Nr. 7, no. 6 (2014-11-13), S.2663-2681 |
| Datensatznummer |
250115777
|
| Publikation (Nr.) |
 copernicus.org/gmd-7-2663-2014.pdf |
|
|
|
|
|
| Zusammenfassung |
| We have presented an overview of a mathematical model, BUOYANT, that was
originally designed for the evaluation of the dispersion of buoyant plumes
originated from major warehouse fires. The model addresses the variations of
the cross-plume integrated properties of a buoyant plume in the presence of a
vertically varying atmosphere. The model also includes a treatment for a
rising buoyant plume interacting with an inversion layer. We have compared
the model predictions with the data of two prescribed wild-land fire
experiments. For the SCAR-C experiment in Quinault (US) in 1994, the
predicted vertical extents of the plume at maximum plume rise were between
500 and 800 m and between 200 and 700 m, using two alternative meteorological data sets.
The corresponding observed injection heights of the aerosol particles
measured using an airborne lidar (light detection and ranging) ranged from
250 to 600 m. For the prescribed burning experiment in Hyytiälä
(Finland) in 2009, the model predictions were compared with plume elevations
and diameters, determined based on particulate matter number concentration
measurements onboard an aeroplane. However, the agreement between modelled and
measured results substantially depends on how the properties of the source
term are evaluated, especially regarding the convective heat fluxes from the
fire. The results demonstrate that in field experiments on wild-land fires,
there are substantial uncertainties in estimating both (i) the source terms
for the atmospheric dispersion computations and (ii) the relevant vertical
meteorological profiles. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|