Skip to Main content Skip to Navigation
Journal articles

Modeling Eruption Source Parameters by Integrating Field, Ground-Based, and Satellite-Based Measurements: The Case of the 23 February 2013 Etna Paroxysm

Abstract : Volcanic plumes from Etna volcano (Italy) are governed by easterly winds driving ash over the Ionian Sea. The limited land tephra deposit makes total grain‐size distribution (TGSD) assessment and its fine ash fraction highly uncertain. On 23 February 2013, a lava fountain produced a ~9‐km‐high column above sea level (a.s.l.). The atypical north‐easterly wind direction dispersed the tephra from Etna to the Puglia region (southern Italy) allowing sampling up to very distal areas. This study uses field measurements to estimate the field‐based TGSD. Very fine ash distribution (particle matter below 10 μm—PM10) is explored parameterizing the field‐TGSD through a bi‐lognormal and bi‐Weibull distribution. However, none of the two latter TGSDs allow simulating any far‐traveling airborne ash up to distal areas. Accounting for the airborne ash retrieved from satellite (Spinning Enhanced Visible and Infrared Imager), we proposed an empirical modification of the field‐based TGSD including very fine ash through a power law decay of the distribution. The input source parameters are inverted by comparing simulations against measurements. Results suggest a column height of ~8.7 km a.s.l., a total erupted mass of ~4.9 × 109 kg, a PM10 content between 0.4 and 1.3 wt%, and an aggregate fraction of ~2 wt% of the fine ash. Aerosol optical depth measurements from the AErosol RObotic NETwork are also used to corroborate the results at ~1,700 km from the source. Integrating numerical models with field, ground‐based, and satellite‐based data aims at providing a better TGSD estimation including very fine ash, crucial for air traffic safety.
Complete list of metadata

https://hal.uca.fr/hal-02057109
Contributor : Sylvaine Jouhannel Connect in order to contact the contributor
Submitted on : Monday, November 29, 2021 - 1:19:10 PM
Last modification on : Tuesday, November 30, 2021 - 3:38:38 AM

File

2017JB015163.pdf
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

  • HAL Id : hal-02057109, version 1

Collections

Citation

M. Poret, A. Costa, D. Andronico, S. Scollo, M. Gouhier, et al.. Modeling Eruption Source Parameters by Integrating Field, Ground-Based, and Satellite-Based Measurements: The Case of the 23 February 2013 Etna Paroxysm. Journal of Geophysical Research : Solid Earth, American Geophysical Union, 2018, 123 (7), pp.5427-5450. ⟨hal-02057109⟩

Share

Metrics

Record views

26

Files downloads

14