Results 21 to 30 of about 24,110 (329)
Frontiers in Earth Science, 2023 Bromine monoxide (BrO) and sulphur dioxide (SO2) are two gases frequently observed in volcanic plumes by spectroscopic techniques capable of continuous gas monitoring like, e.g., Differential Optical Absorption Spectroscopy (DOAS).
Alexander Nies +8 more
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On the use of plume models to estimate the flux in volcanic gas plumes
Nature Communications, 2021 Monitoring the flux of gas from volcanoes is a fundamental component of volcano monitoring programs and is used as a basis for eruption forecasting. Here, the authors present a new method using video images of volcanic gas plumes to measure the speed of ...
Julia Woitischek +3 more
doaj +1 more source
Investigation of chlorine radical chemistry in the Eyjafjallajkull volcanic plume using observed depletions in non-methane hydrocarbons [PDF]
, 2011 As part of the effort to understand volcanic plume composition and chemistry during the eruption of the Icelandic volcano Eyjafjallajkull, the CARIBIC atmospheric observatory was deployed for three special science flights aboard a Lufthansa passenger ...
Adam Wisher +35 more
core +1 more source
Visible and invisible volcanic plumes [PDF]
Geophysical Research Letters, 2006 Volcanic plumes, discharging from craters or fumaroles, are usually observed at active volcanoes. These plumes are divided into two categories from their appearance; one is a transparent invisible plume, composed of volcanic gases, and the other is a white, visible plume, containing water droplets in addition to the vapors.
N. Matsushima, H. Shinohara
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Image analysis of volcanic plumes: A simple calibration tool to correct for the effect of wind
Volcanica, 2023 Video cameras provide vital information on volcanic plumes from explosive eruptions, such as plume height, for monitoring and research. These images must be calibrated to get accurate quantitative data.
Eveanjelene Snee +6 more
doaj +1 more source
Lidar sounding of volcanic plumes [PDF]
SPIE Proceedings, 2013 ABSTRACT Accurate knowledge of gas composition in volcanic plumes has high scientific and societal value. On the one hand, it gives information on the geophysical processes taking place inside volcanos; on the other hand, it provides alert on possible eruptions. For this reasons, it has been suggested to monitor volcanic plumes by lidar. In particular,
Fiorani, L +8 more
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Karymsky volcano eruptive plume properties based on MISR multi-angle imagery and the volcanological implications [PDF]
Atmospheric Chemistry and Physics, 2018 Space-based operational instruments are in unique positions to monitor volcanic activity globally, especially in remote locations or where suborbital observing conditions are hazardous.
V. J. B. Flower +2 more
doaj +1 more source
ASHEE: a compressible, equilibrium-Eulerian model for volcanic ash plumes [PDF]
, 2015 A new fluid-dynamic model is developed to numerically simulate the non-equilibrium dynamics of polydisperse gas-particle mixtures forming volcanic plumes. Starting from the three-dimensional N-phase Eulerian transport equations for a mixture of gases and
Berselli, Luigi Carlo +2 more
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Sedimentation from strong volcanic plumes [PDF]
Journal of Geophysical Research: Solid Earth, 2003 We develop descriptions of the key processes influencing tephra dispersal from strong volcanic plumes. These are characterized by the development of a subvertical eruption column in the atmosphere that forms a spreading current at a level of neutral buoyancy.
Bonadonna, Costanza +1 more
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Volcanic Plumes: Impacts on the Atmosphere and Insights into Volcanic Processes
Geosciences, 2018 Here we introduce a Special Issue of Geosciences focused on the scientific research field of ‘Volcanic Plumes: Impacts on the atmosphere and insights into volcanic processes’ [...]
Andrew J. S. McGonigle +2 more
doaj +1 more source