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| Titel |
Synergistic use of Lagrangian modelling, satellite- and ground-based measurements for the investigation of volcanic plumes evolution and their impact on the downwind aerosol optical and micro-physical properties: the Etna eruption of 26-27/10/2013 |
| VerfasserIn |
Pasquale Sellitto, Alcide di Sarra, Stefano Corradini, Marie Boichu, Hervé Herbin, Philippe Dubuisson, Geneviève Sèze, Daniela Meloni, Francesco Monteleone, Luca Merucci, Justin Rusalem, Giuseppe Salerno, Pierre Briole, Bernard Legras |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111195
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| Publikation (Nr.) |
 EGU/EGU2015-11284.pdf |
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| Zusammenfassung |
| In this contribution we show how the combined use of SO2/ash plume dispersion modelling
and remote observations from satellite and ground can be used to study the influence of
moderate volcanic activity on the optical and micro-physical characterization of the
tropospheric aerosol layer at the regional scale. We analyze the Mount Etna lava fountain and
gas/ash emission episode of 26-27/10/2013. This study is based on aerosol and SO2
measurements made at the ENEA Station for Climate Observations (35.52°N, 12.63°E, 50 m
asl) on Lampedusa island, on satellite observations, and on a Lagrangian model analysis. The
used satellite dataset includes MODIS (MODerate resolution Imaging Spectroradiometer)
true colour images, volcanic SO2/ash retrievals and flux estimations, and SEVIRI (Spinning
Enhanced Visible and InfraRed Imager) cloud top pressure estimations. Trajectory analyses
are made with the FLEXPART (FLEXible PARTicle dispersion model) Lagrangian
dispersion model. The combination of MODIS and SEVIRI observations, FLEXPART
simulations, and ground-based observations at Lampedusa indicate that SO2 and
ash, despite the initial injection at about 7.0 km altitude, could have reached up
to 10.0-12.0 km altitude, and influenced the aerosols size distribution downwind
at a ground station, at more than 350 km distance, in the Southern sector of the
Central Mediterranean. This study indicates that even a relatively small volcanic
eruption can have an observable effect on the aerosol layer at the regional scale. Some
arguments are given on the likely impact of the secondary sulphate aerosols formed from
the conversion of the emitted SO2 on the aerosol size distribution at Lampedusa. |
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