Sébastien VALADE

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Sébastien VALADE

Function: Post doctoral research fellow

Main Research Unit: LMV

E-mail:

Presentation

During his postdoctoral fellowship with ClerVolc in 2012-2014, Sébastien used infrared cameras to study the dynamics of small scale ash plumes. A freeware (plumeTracker) was designed to track and analyze the plumes through time, and to extract descriptive parameters such as ascent velocities, volume, spreading rate, air entrainment coefficient, heat budget, ash mass loading, etc… With Matteo Cerminara from INGV Pisa, he reconstructed synthetic two-dimensional thermal images of volcanic plumes from analytical one-dimensional models. These were then compared with, and fitted to, thermal images of real plumes in order to recover the best input parameters, such as the source ash mass, particle size distribution and air entrainment coefficient.

ClerVolc Publications

85. Valade S.A., Harris A., Cerminara M. (2014). Plume AscentTracker: Interactive Matlab software for analysis of ascending plumes in image data. Computers & Geosciences 66, 132-144. doi:10.1016/j.cageo.2013.12.015.

3. Gouhier M., Harris A., Calvari S., Labazuy P., Guéhenneux Y., Donnadieu F., Valade S. (2012). Lava discharge during Etna’s January 2011 fire fountain tracked using MSG-SEVIRI. Bulletin of Volcanology vol.74, p.787-793, 4, doi:10.1007/s00445-011-0572-y.

Sébastien VALADE