Geochemical and mineralogical characterisation of selected ...
Geochemical and mineralogical characterisation of selected ...
Geochemical and mineralogical characterisation of selected ...
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<strong>Geochemical</strong> <strong>and</strong> <strong>mineralogical</strong><br />
<strong>characterisation</strong> <strong>of</strong> <strong>selected</strong> Saharan<br />
dust events collected in aerosol<br />
sampled at Lampedusa Isl<strong>and</strong>.<br />
S. Becagli 1 ,E. Castellano 1 , F. Marino 1,2 , M. Severi 1 ,<br />
R. Traversi 1 , F. Rugi 1 , D. M. Sferlazzo 3 , C. Bommarito 3 ,<br />
A. Di Sarra 4 , F. Lucarelli 5 , S. Nava 5 , M. Chiari 5 , R. Udisti 1<br />
1 Dept. <strong>of</strong> Chemistry, University <strong>of</strong> Florence, Italy<br />
2 DISAT, University <strong>of</strong> Milano Bicocca, Italy<br />
3 ENEA, Climate laboratory, Palermo<br />
4 ENEA C.R. Casaccia, Roma, Italy<br />
5 Dept. <strong>of</strong> Physic, University <strong>of</strong> Florence <strong>and</strong> INFN, Italy.<br />
silvia.becagli@unifi.it
SAMPLING SITE
PIXE<br />
SEM-EDAX<br />
Ions Chromatography<br />
Na, NH4, K, Mg, Ca,<br />
Cl, NO3-, SO4,<br />
MSA, Ac, For, Gly, Ox<br />
HR-ICPMS<br />
Al, Fe, Mn, Ti, Cu,<br />
Cd, V, Ni, Cr, Pb,<br />
Hg
APCA: Absolute principal component analysis
Ratio between soluble(by HR-ICPMS or IC) <strong>and</strong> total (by<br />
PIXE) fractions <strong>of</strong> <strong>selected</strong> crustal markers
Ratio between <strong>selected</strong> crustal markers during<br />
Saharan dust events in comparison with mean<br />
crustal ratio<br />
(Ti/Si) crust<br />
=0.0202
Mineralogical analyses <strong>of</strong> Saharan dust event by SEM
Angstrom exponent <strong>and</strong> optical depth at 500 nm measured<br />
at Lampedusa during 2005.<br />
Cases<br />
dominated by<br />
Saharan dust<br />
are<br />
characterized<br />
by values <strong>of</strong> the<br />
Angstrom<br />
exponent
Thanks for your attention!!!
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