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|Authors: ||Spampinato, L.*|
Hernandez, P. A.
Perez, N. M.
Del Negro, C.*
Yalire, M. M.
|Title: ||Thermal insights into the dynamics of Nyiragongo lava lake from ground and satellite measurements|
|Title of journal: ||Journal of geophysical research - solid earth|
|Series/Report no.: ||/118 (2013)|
|Publisher: ||American Geophysical Union|
|Issue Date: ||30-Oct-2013|
|Keywords: ||thermal imagery|
satellite thermal images
|Abstract: ||We present new insights into the short- and long-term thermal activity of the
Nyiragongo lava lake by ground-based and satellite infrared thermal imagery recorded in
the first half of 2012. This is the very first time in which FLIR camera and SEVIRI data have
been compared at this volcano. Maximum temperatures recorded at the molten lava were of
~1180 K, whereas the lake skin remained always below ~734 K in areas far from the
upwelling zone and below ~843 K in those proximal to the source region. Ground-based
imagery yielded mean radiative power values between ~0.80 and 1.10 GW. Consistently,
satellite observations showed similar mean values of 1.10 GW. Overall the thermal activity
of the lava lake was quite variable along the three days of field measurements at both daily
and intradaily scale. SEVIRI radiative power values retrieved for the January–June 2012
period revealed fluctuations within the same variability range suggesting that no significant
changes of the lava lake area had occurred over the six months. Comparison with previous
radiative power estimates showed that our data well agree with the general increasing trend
recorded since the reappearance of the lava lake after the last flank eruption in 2002.|
|Appears in Collections:||04.08.06. Volcano monitoring|
Papers Published / Papers in press
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