Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item:

Authors: Pisani, G.*
Boselli, A.*
Coltelli, M.*
Leto, G.*
Pica, G.*
Scollo, S.*
Spinelli, N.*
Wang, X.*
Title: Lidar depolarization measurement of fresh volcanic ash from Mt. Etna, Italy
Title of journal: Atmospheric Environment
Series/Report no.: /62 (2012)
Issue Date: 8-Aug-2012
DOI: 10.1016/j.atmosenv.2012.08.015
Keywords: lidar
volcanic ash
Abstract: A small, portable, polarization lidar system with scanning capability was used to perform range resolved measurements of fresh erupted volcanic plume from Mount Etna in Italy. Measurements were carried out on November 15, 2010 during a volcanic plume emission event by placing the lidar very close to volcano summit craters. Depolarization measurements highlighted that aerosol of different shape and optical properties were emitted by the two involved vents, Bocca Nuova and North-East Craters. In the plume emitted from Bocca Nuova Crater the mean value of aerosol linear depolarization ratio resulted near to zero, corresponding to non depolarizing particles or liquid droplets, while values of (16 2)% and (45 3)% were observed in the ash plume emitted from North-East Crater, in the morning and in the afternoon, respectively. The retrieved values of volcanic aerosol depolarization ratio, aerosol backscattering and lidar-ratio allowed distinguishing the changes in the properties of the emitted aerosol. Furthermore, the ash mass concentration at source was estimated, reaching a maximum value of 24,000 6000 mg m 3, with an additional systematic uncertainty of 50% related to the assumption of an effective radius of 10 mm for ash particles
Appears in Collections:01.01.08. Instruments and techniques
Papers Published / Papers in press

Files in This Item:

File SizeFormatVisibility
Pisani_et_al_2012.pdf543.39 kBAdobe PDFonly authorized users View/Open

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Share this record




Stumble it!



Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA