Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-1146
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Jan 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Reconstructing volcanic plume evolution integrating satellite and ground-based data: Application to the 23rd November 2013 Etna eruption
Matthieu Poret1,2, Stefano Corradini3, Luca Merucci3, Antonio Costa1, Daniele Andronico4, Mario Montopoli5, Gianfranco Vulpiani6, and Valentin Freret-Lorgeril7 1Istituto Nazionale di Geofisica e Vulcanologia, Bologna, Italy
2University of Bologna, Geophysics department, Bologna, Italy
3Istituto Nazionale di Geofisica e Vulcanologia, CNT, Roma, Italy
4Istituto Nazionale di Geofisica e Vulcanologia, OsservatorioEtneo, Catania, Italy
5Institute of Atmospheric Sciences and Climate, National Research Council of Italy, Roma, Italy
6Department of Civil Protection, Presidency of the Councils of Ministers, Roma, Italy
7Université Clermont Auvergne, CNRS, IRD, OPGC, Laboratoire Magmas et Volcans, 63000 Clermont- Ferrand, France
Abstract. Recent explosive eruptions recorded from different volcanoes worldwide (e.g. Hekla in 2000, Eyjafjallajökull in 2010, Cordón-Caulle in 2011) demonstrated the necessity of a better assessment of the eruption source parameters (e.g. column height, mass eruption rate and especially the Total Grain-Size Distribution – TGSD) to reduce the uncertainties associated with the far-travelling airborne ash mass. To do so, volcanological studies started to integrate observations in order to use more realistic numerical inputs, crucial for taking robust volcanic risk mitigation actions. On 23rd November 2013, Etna volcano (Italy) erupted producing a 10-km height plume, from which two volcanic clouds were observed at two different altitudes from satellite (MSG-SEVIRI, MODIS). One was described as mainly composed by very fine ash (i.e. PM20), whereas the second one as made of ice/SO2 droplets (i.e. not measurable in terms of ash mass). Atypical north-easterly winds transported the tephra from Etna towards the Puglia region (southern Italy), permitting tephra sampling in proximal (i.e. ~ 5–25–km from source) and medial areas (i.e. Calabria region, ~ 160 km). Based on the field data analysis, we estimated the TGSD but the paucity of data (especially related to the fine ash fraction) prevented it from being entirely representative of the initial magma fragmentation. To better estimate the TGSD covering the entire grain-size spectrum, we integrated the available field data with X-band weather radar and satellite retrievals. The resulting TGSD is used as input for the FALL3D tephra dispersal numerical model to reconstruct the tephra loading and the far-travelling airborne ash mass. The optimal TGSD is selected by solving an inverse problem through a best-fit with the field, ground-based and satellite-based measurements. The results suggest a total erupted mass of 1.2 × 109 kg, which is very similar to the field-derived value of 1.3 × 109 kg, and a TGSD with a PM20 fraction between 3.6 and 9.0 wt%.

Citation: Poret, M., Corradini, S., Merucci, L., Costa, A., Andronico, D., Montopoli, M., Vulpiani, G., and Freret-Lorgeril, V.: Reconstructing volcanic plume evolution integrating satellite and ground-based data: Application to the 23rd November 2013 Etna eruption, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-1146, in review, 2018.
Matthieu Poret et al.
Matthieu Poret et al.
Matthieu Poret et al.

Viewed

Total article views: 184 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
130 50 4 184 2 2 1

Views and downloads (calculated since 02 Jan 2018)

Cumulative views and downloads (calculated since 02 Jan 2018)

Viewed (geographical distribution)

Total article views: 184 (including HTML, PDF, and XML)

Thereof 182 with geography defined and 2 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 18 Jan 2018
Publications Copernicus
Download
Short summary
This study aims at proposing a method to better assess the initial magma fragmentation produced during explosive volcanic eruptions. We work on merging the field, ground-based radar and satellite data to estimate the total grain-size distribution, which is used within simulations to reconstruct the tephra loading and the far-travelling airborne ash dispersal. Such approach permits from assessing the range of very fine ash fraction related with volcanic hazards (e.g. air traffic safety).
This study aims at proposing a method to better assess the initial magma fragmentation produced...
Share