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| Titel |
Inclusion of ash and SO2 emissions from volcanic eruptions in WRF-Chem: development and some applications |
| VerfasserIn |
M. Stuefer, S. R. Freitas, G. Grell, P. Webley, S. Peckham, S. A. McKeen, S. D. Egan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 6, no. 2 ; Nr. 6, no. 2 (2013-04-09), S.457-468 |
| Datensatznummer |
250017802
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| Publikation (Nr.) |
 copernicus.org/gmd-6-457-2013.pdf |
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| Zusammenfassung |
| We describe a new functionality within the Weather Research and Forecasting
(WRF) model with coupled Chemistry (WRF-Chem) that allows simulating
emission, transport, dispersion, transformation and sedimentation of
pollutants released during volcanic activities. Emissions from both an
explosive eruption case and a relatively calm degassing situation are
considered using the most recent volcanic emission databases. A preprocessor
tool provides emission fields and additional information needed to establish
the initial three-dimensional cloud umbrella/vertical distribution within the
transport model grid, as well as the timing and duration of an eruption. From
this source condition, the transport, dispersion and sedimentation of the ash
cloud can be realistically simulated by WRF-Chem using its own dynamics and
physical parameterization as well as data assimilation. Examples of model
applications include a comparison of tephra fall deposits from the 1989
eruption of Mount Redoubt (Alaska) and the dispersion of ash from the 2010
Eyjafjallajökull eruption in Iceland. Both model applications show good
coincidence between WRF-Chem and observations. |
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