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| Titel |
Summer variability of Saharan dust transport events in mountain areas north and south of Po basin |
| VerfasserIn |
Tony C. Landi, Angela Marinoni, Paolo Cristofanelli, Davide Putero, Rocco Duchi, Marcello Alborghetti, Ubaldo Bonafè, Francescopiero Calzolari, Gian Pietro Verza, Paolo Bonasoni |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079028
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| Zusammenfassung |
| Mineral dust intrusions from northern African desert regions have a strong impact on the
Mediterranean areas and Italian peninsula as they can cause an anomalous increase of aerosol
concentrations in the tropospheric column and often an increase of particulate matter at
ground level. The estimate of Saharan dust contribution to aerosols concentrations is
therefore a key issue in air quality assessment and policy formulation, since can cause air
quality exceedances of the PM10 daily limits (50 μg m-3) set by the European Union
(EU/2008/50).
This study presents a first identification and characterization of Saharan dust
outbreaks observed during summer season at two high mountain stations located both
South (Mt. Cimone, 2165 m asl) and North (Rifugio Guasti, Stelvio National Park,
3285 m asl) of Po valley. An estimation of their impact on PM10 concentrations in
both sites, and in urban and rural areas of the Po basin is provided. Joining specific
measurements (ground and satellite based) and numerical modeling, an investigation into the
vertical structure of dust load will be presented. Actually, methodologies conceived
for distinguishing dust outbreaks transported above the boundary layer without
any impact at the ground level from those causing deposition are currently still
lacking.
Basically, the approach proposed in this work includes a deep analysis of in-situ
measurements starting from long-term observation of Saharan dust carried out at the Mt.
Cimone and more recent measurements performed in the framework of SHARE Stelvio
Project, as well as the usage of ad hoc model chain (meteorological processor, chemical
transport model, and aerosols optical properties calculation) to describe emission, transport
and deposition dynamics of mineral dust that – in summertime - often affect the North Italy. |
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