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  Porous aerosol in degassing plumes of Mt. Etna and Mt. Stromboli

Shcherbakov, V., Jourdan, O., Voigt, C., Gayet, J., Chauvigne, A., Schwarzenboeck, A., et al. (2016). Porous aerosol in degassing plumes of Mt. Etna and Mt. Stromboli. Atmospheric Chemistry and Physics, 16, 11883-11897. doi:10.5194/acp-16-11883-2016.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-9DC5-3 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-9DC9-C
Genre: Journal Article

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Shcherbakov, V., Author
Jourdan, O., Author
Voigt, C., Author
Gayet, J.F., Author
Chauvigne, A., Author
Schwarzenboeck, A., Author
Minikin, A., Author
Klingebiel, Marcus1, Author
Weigel, R., Author
Borrmann, S., Author
Jurkat, T., Author
Kaufmann, S., Author
Schlage, R., Author
Gourbeyre, C., Author
Febvre, G., Author
Lapyonok, T., Author
Frey, W., Author
Molleker, S., Author
Weinzierl, B., Author
Affiliations:
1Observations and Process Studies, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913575              

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Free keywords: Falconidae
 Abstract: Aerosols of the volcanic degassing plumes from Mt. Etna and Mt. Stromboli were probed with in situ instruments on board the Deutsches Zentrum für Luft-und Raumfahrt research aircraft Falcon during the contrail, volcano, and cirrus experiment CONCERT in September 2011. Aerosol properties were analyzed using angular-scattering intensities and particle size distributions measured simultaneously with the Polar Nephelometer and the Forward Scattering Spectrometer probes (FSSP series 100 and 300), respectively. Aerosols of degassing plumes are characterized by low values of the asymmetry parameter (between 0.6 and 0.75); the effective diameter was within the range of 1.5-2.8μm and the maximal diameter was lower than 20μm. A principal component analysis applied to the Polar Nephelometer data indicates that scattering features of volcanic aerosols of different crater origins are clearly distinctive from angular-scattering intensities of cirrus and contrails. Retrievals of aerosol properties revealed that the particles were "optically spherical" and the estimated values of the real part of the refractive index are within the interval from 1.35 to 1.38. The interpretation of these results leads to the conclusion that the degassing plume aerosols were porous with air voids. Our estimates suggest that aerosol particles contained about 18 to 35 of air voids in terms of the total volume. © 2016 Author(s).

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Language(s): eng - English
 Dates: 20162016
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: DOI: 10.5194/acp-16-11883-2016
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Title: Atmospheric Chemistry and Physics
Source Genre: Journal
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Pages: - Volume / Issue: 16 Sequence Number: - Start / End Page: 11883 - 11897 Identifier: -