7 research outputs found
Erratum to: Lava discharge during Etnaâs January 2011 fire fountain tracked using MSG-SEVIRI
In the paper by Gouhier, M., Harris, A., Calvari, S., Labazuy,
P., GuĂ©henneux, Y., Donnadieu, F., Valade, S, entitled âLava
discharge during Etnaâs January 2011 fire fountain tracked
using MSG-SEVIRIâ (Bull Volcanol (2012) 74:787â793,
DOI 10.1007/s00445-011-0572-y), we present data from a
Doppler radar (VOLDORAD 2B). This ground-based Lband
radar has been monitoring the eruptive activity of the
summit craters of Mt. Etna in real-time since July 2009 from a
site about 3.5 km SSE of the craters. Examples of applications
of this type of radar are reviewed by Donnadieu (2012)
and shown on the VOLDORAD website (http://wwwobs.
univbpclermont.fr/SO/televolc/voldorad/).
Although designed and owned by the Observatoire de
Physique du Globe in Clermont-Ferrand (OPGC), France,
VOLDORAD 2B is operated jointly with the INGV-Catania
(Italy) in the framework of a technical and scientific collaboration
agreement between the INGV of Catania, the French
CNRS and the OPGC-Université Blaise Pascal in Clermont-
Ferrand. The system also utilizes a dedicated micropatch
antenna designed at the University of Calabria (Boccia et al.
2010) and owned by INGV. The objective of the joint acquisition
of the radar data by INGV-Catania and the OPGC is
twofold: (1) to mitigate volcanic risks at Etna by better assessing
the hazards arising from ash plumes and (2) to allow detailed
study of volcanic activity and its environmental impact.
In the paper by Gouhier et al. (2012), we failed to
highlight this important collaboration between the INGV
Catania and the OPGC; a cooperation essential for the past,
current and future generation of such valuable data sets.
Specifically we wish to acknowledge the roles of Mauro
Coltelli, Michele Prestifilippo and Simona Scollo for their
important input into this project, and pivotal role in setting
up, and maintaining, this collaborative deployment
Lava discharge during Etna's January 2011 fire fountain tracked using MSG-SEVIRI
Etna's January 2011 eruption provided an excellent
opportunity to test the ability of Meteosat Second Generation
satellite's Spinning Enhanced Visible and InfraRed
Imager (SEVIRI) sensor to track a short-lived effusive
event. The presence of lava fountaining, the rapid expansion
of lava flows, and the complexity of the resulting flow field
make such events difficult to track from the ground. During
the Etna's January 2011 eruption, we were able to use
thermal data collected by SEVIRI every 15 min to generate
a time series of the syn-eruptive heat flux. Lava discharge
waxed over a ~1-h period to reach a peak that was first
masked from the satellite view by a cold tephra plume and
then was of sufficient intensity to saturate the 3.9-ÎŒm
channel. Both problems made it impossible to estimate
time-averaged lava discharge rates using the syn-eruptive
heat flux curve. Therefore, through integration of data
obtained by ground-based Doppler radar and thermal cameras,
as well as ancillary satellite data (from Moderate Resolution
Imaging Spectrometer and Advanced Very High
Resolution Radiometer), we developed a method that
allowed us to identify the point at which effusion stagnated,
to allow definition of a lava cooling curve. This allowed
retrieval of a lava volume of ~1.2Ă106 m3, which, if emitted
for 5 h, was erupted at a mean output rate of ~70 m3 sâ1. The
lava volume estimated using the cooling curve method is
found to be similar to the values inferred from field
measurements
Erratum to: Lava discharge during Etnaâs January 2011 fire fountain tracked using MSG-SEVIRI
In the paper by Gouhier, M., Harris, A., Calvari, S., Labazuy,
P., GuĂ©henneux, Y., Donnadieu, F., Valade, S, entitled âLava
discharge during Etnaâs January 2011 fire fountain tracked
using MSG-SEVIRIâ (Bull Volcanol (2012) 74:787â793,
DOI 10.1007/s00445-011-0572-y), we present data from a
Doppler radar (VOLDORAD 2B). This ground-based Lband
radar has been monitoring the eruptive activity of the
summit craters of Mt. Etna in real-time since July 2009 from a
site about 3.5 km SSE of the craters. Examples of applications
of this type of radar are reviewed by Donnadieu (2012)
and shown on the VOLDORAD website (http://wwwobs.
univbpclermont.fr/SO/televolc/voldorad/).
Although designed and owned by the Observatoire de
Physique du Globe in Clermont-Ferrand (OPGC), France,
VOLDORAD 2B is operated jointly with the INGV-Catania
(Italy) in the framework of a technical and scientific collaboration
agreement between the INGV of Catania, the French
CNRS and the OPGC-Université Blaise Pascal in Clermont-
Ferrand. The system also utilizes a dedicated micropatch
antenna designed at the University of Calabria (Boccia et al.
2010) and owned by INGV. The objective of the joint acquisition
of the radar data by INGV-Catania and the OPGC is
twofold: (1) to mitigate volcanic risks at Etna by better assessing
the hazards arising from ash plumes and (2) to allow detailed
study of volcanic activity and its environmental impact.
In the paper by Gouhier et al. (2012), we failed to
highlight this important collaboration between the INGV
Catania and the OPGC; a cooperation essential for the past,
current and future generation of such valuable data sets.
Specifically we wish to acknowledge the roles of Mauro
Coltelli, Michele Prestifilippo and Simona Scollo for their
important input into this project, and pivotal role in setting
up, and maintaining, this collaborative deployment.Published12611.5. TTC - Sorveglianza dell'attivitĂ eruttiva dei vulcaniJCR Journalrestricte