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| Titel |
Physical and optical properties of atmospheric aerosols by in-situ and radiometric measurements |
| VerfasserIn |
M. Calvello, F. Esposito, G. Pavese, C. Serio |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 5 ; Nr. 10, no. 5 (2010-03-02), S.2195-2208 |
| Datensatznummer |
250008164
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| Publikation (Nr.) |
 copernicus.org/acp-10-2195-2010.pdf |
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| Zusammenfassung |
| Physical and optical properties of atmospheric aerosols collected by using a
high resolution (1.5 nm) spectroradiometer (spectral range 400–800 nm), a
13-stage Dekati Low Pressure Impactor (size range 30 nm–10 μm), and an
AE31 Aethalometer (7 wavelenghts from 370 nm to 950 nm), have been examined
in a semi-rural site in Southwest Italy (Tito Scalo, 40°35' N, 15°41' E, 750 m a.s.l.).
In particular, daily averaged values of AOD and
Ångström turbidity parameters from radiometric data together with
mass-size distributions from impactor data and Black Carbon (BC)
concentrations have been analyzed from May to October 2008. Furthermore, by
inverting direct solar radiances, aerosol columnar number and volume size
distributions have been obtained for the same period. The comparison of
different observation methods, allowed to verify if, and in what conditions,
changes in aerosol properties measured at ground are representative of
columnar properties variations. Agreement between columnar and in-situ
measurements has been obtained in case of anthropogenic aerosol loading,
while in case of Saharan dust intrusions some discrepancies have been found
when dust particles were located at high layers in the atmosphere (4–8 km)
thus affecting columnar properties more than surface ones. For anthropogenic
aerosols, a good correlation has been confirmed through the comparison of
fine aerosol fraction contribution as measured by radiometer, impactor and
aethalometer, suggesting that, in this case, the particles are more
homogeneously distributed over the lower layers of atmosphere and columnar
aerosol optical properties are dominated by surface measured component. |
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