Results 21 to 30 of about 319,392 (290)

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, Paul Antony Jarvis, Riccardo Simionato, Simona Scollo, Michele Prestifilippo, Wim Degruyter, Costanza Bonadonna   +6 more
doaj   +1 more source

Model-based aviation advice on distal volcanic ash clouds by assimilating aircraft in situ measurements [PDF]

Atmospheric Chemistry and Physics, 2016
The forecast accuracy of distal volcanic ash clouds is important for providing valid aviation advice during volcanic ash eruption. However, because the distal part of volcanic ash plume is far from the volcano, the influence of eruption information on
G. Fu, A. Heemink, S. Lu, A. Segers, K. Weber, H.-X. Lin   +5 more
doaj   +1 more source

Quantitative Retrieval of Volcanic Sulphate Aerosols from IASI Observations

Remote Sensing, 2021
We developed a new retrieval algorithm based on the Infrared Atmospheric Sounding Interferometer (IASI) observations, called AEROIASI-H2SO4, to measure the extinction and mass concentration of sulphate aerosols (binary solution droplets of sulphuric acid
Henda Guermazi, Pasquale Sellitto, Juan Cuesta, Maxim Eremenko, Mathieu Lachatre, Sylvain Mailler, Elisa Carboni, Giuseppe Salerno, Tommaso Caltabiano, Laurent Menut, Mohamed Moncef Serbaji, Farhat Rekhiss, Bernard Legras   +12 more
doaj   +1 more source

On the Fluctuations in Volcanic Plumes [PDF]

Geophysical Research Letters, 2021
AbstractSome basaltic open vent volcanoes show that spectroscopic SO2 measurements of a volcanic gas plume are characterized by a fluctuating signal. Understanding the origin of these fluctuations is of great interest for interpreting volcanic gas emission regimes. Although some fluctuations may be associated with intermittency in the source flux, some
Julia Woitischek, Marie Edmonds, Andrew W. Woods   +2 more
openaire   +2 more sources

Simulating the Transport and Dispersal of Volcanic Ash Clouds With Initial Conditions Created by a 3D Plume Model

Frontiers in Earth Science, 2021
Volcanic ash transport and dispersion (VATD) models simulate atmospheric transport of ash from a volcanic source represented by parameterized concentration of ash with height.
Zhixuan Cao, Zhixuan Cao, Marcus Bursik, Qingyuan Yang, Qingyuan Yang, Abani Patra, Abani Patra   +6 more
doaj   +1 more source

Particle aging and aerosol–radiation interaction affect volcanic plume dispersion: evidence from the Raikoke 2019 eruption

, 2020
. A correct and reliable forecast of volcanic plume dispersion is vital for aviation safety. This can only be achieved by representing all responsible physical and chemical processes (sources, sinks, and interactions) in the forecast models.
L. Muser, G. Hoshyaripour, J. Bruckert, Á. Horváth, E. Malinina, S. Wallis, Fred J. Prata, Alexei Rozanov, Christian von Savigny, H. Vogel, B. Vogel   +10 more
semanticscholar   +1 more source

Gas emission strength and evolution of the molar ratio of BrO/SO2 in the plume of Nyiragongo in comparison to Etna [PDF]

, 2015
Airborne and ground-based differential optical absorption spectroscopy observations have been carried out at the volcano Nyiragongo (Democratic Republic of Congo) to measure SO2 and bromine monoxide (BrO) in the plume in March 2004 and June 2007 ...
Aiuppa, Aiuppa, Aiuppa, Aiuppa, Aiuppa, Bobrowski, Bobrowski, Bobrowski, Bobrowski, Bobrowski, Boichu, Bureau, Carn, Chakrabarti, Delmelle, Dorf, Durieux, Ebinger, Fitzenberger, Galle, Galle, Gerlach, Gerlach, Gerlach, Giggenbach, Glasow, Glasow, Glasow, Glasow, Halmer, Honda, Horrocks, Hönninger, Kelly, Kern, Kitto, Komorowski, Kutterolf, Lary, Lazrus, Martin, Martin, Noguchi, Oppenheimer, Parrella, Pennisi, Pinto, Platt, Pundt, Pyle, Richter, Richter, Roberts, Robock, Rogers, Rogers, Saiz-Lopez, Salawitch, Sawyer, Schofield, Schofield, Sedlacek, Shinohara, Sturges, Surl, Symonds, Tazieff, Theys, Theys, Wennberg, Witt, Wittmer, Woods, Yang   +73 more
core   +1 more source

Particle Aging and Aerosol–Radiation Interaction Affect Volcanic Plume Dispersion: Evidence from Raikoke Eruption 2019

, 2020
. A correct and reliable forecast of volcanic plume dispersion is vital for aviation safety. This can only be achieved by representing all responsible physical and chemical processes (sources, sinks, and interactions) in the forecast models.
L. Muser, G. Hoshyaripour, J. Bruckert, Á. Horváth, E. Malinina, S. Peglow, Fred J. Prata, Alexei Rozanov, Christian von Savigny, H. Vogel, B. Vogel   +10 more
semanticscholar   +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
openaire   +1 more source

Ozone Depletion in Tropospheric Volcanic Plumes: From Halogen-Poor to Halogen-Rich Emissions

Geosciences, 2018
Volcanic halogen emissions to the troposphere undergo a rapid plume chemistry that destroys ozone. Quantifying the impact of volcanic halogens on tropospheric ozone is challenging, only a few observations exist.
Tjarda J. Roberts
doaj   +1 more source