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Atmosphere 2018, 9(10), 369; https://doi.org/10.3390/atmos9100369

Characterization of In Situ Aerosol Optical Properties at Three Observatories in the Central Mediterranean

1
Istituto di Scienze dell’Atmosfera e del Clima, ISAC-CNR, 73100 Lecce, Italy
2
Istituto di Scienze dell’Atmosfera e del Clima, ISAC-CNR, 88046 Lamezia Terme, Italy
3
Istituto di Scienze dell’Atmosfera e del Clima, ISAC-CNR, 40129 Bologna, Italy
*
Author to whom correspondence should be addressed.
Received: 25 July 2018 / Revised: 17 September 2018 / Accepted: 19 September 2018 / Published: 21 September 2018
(This article belongs to the Section Aerosols)
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Abstract

In this work, results of scattering and backscattering coefficients, scattering Ångström exponent (SAE), single scattering albedo (SSA), and asymmetry parameter (g) of atmospheric aerosols are presented. All these parameters were measured during the month of April 2016 in Southern Italy on three different Global Atmosphere Watch observatories in the Central Mediterranean. This is the first time, to our knowledge, that optical aerosol properties were studied at the same time, even if in a brief intensive measurement campaign, at three sites in the South of Italy. In order to obtain a characteristic value for aerosol optical properties, different kinds of particle sources (i.e., dust, marine, and anthropic) have been identified and studied. In the measurement period, one event of a long-range transport of Saharan dust from Northern Africa was observed at all observatories. During the Saharan dust transport event, a minimum value of the SAE (0.69 ± 0.34) and a relatively higher values of SSA were observed. During the dust event, g increased up to 0.69. Marine aerosol contribution and anthropic/urban aerosol intrusion were analysed. From this analysis, SAE average values were 0.70, 0.84, and 1.22, respectively, for dust, marine, and anthropic particles. On the other hand, the SSA minimum value was 0.86 for anthropic particles, and it increased for dust (0.88) and marine (0.93) aerosols. The asymmetry parameter had a limited variability for the three types of aerosol from 0.62 to 0.58, as reported also in literature. View Full-Text
Keywords: aerosol optical properties; single scattering albedo (SSA); Ångström exponent (SAE); asymmetry parameter; particulate matter aerosol optical properties; single scattering albedo (SSA); Ångström exponent (SAE); asymmetry parameter; particulate matter
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Donateo, A.; Lo Feudo, T.; Marinoni, A.; Dinoi, A.; Avolio, E.; Merico, E.; Calidonna, C.R.; Contini, D.; Bonasoni, P. Characterization of In Situ Aerosol Optical Properties at Three Observatories in the Central Mediterranean. Atmosphere 2018, 9, 369.

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