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  • 1
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publikationsdatum: 2023-12-20
    Beschreibung: Volcanoes release plumes of gas and ash to the atmosphere during episodes of passive and explosive behavior. These ejecta have important implications for the chemistry and composition of the troposphere and stratosphere, with the capacity to alter Earth's radiation budget and climate system over a range of temporal and spatial scales. Volcanogenic sulphur dioxide reacts to form sulphate aerosols, which increase global albedo, e.g., by reducing surface temperatures, in addition to perturbing the formation processes and optical properties of clouds. Released halogen species can also deplete stratospheric and tropospheric ozone. Volcanic degassing, furthermore, played a key role in the formation of Earth’s atmosphere, and volcanic plumes can affect air quality, pose hazards to aviation and human health, as well as damage ecosystems. The chemical compositions and emission rates of volcanic plumes are also monitored via a range of direct-sampling and remote-sensing instrumentation, in order to gain insights into subterranean processes, in the respect of the magmatic bodies these volatiles exsolve from. Given the significant role these gases play in driving volcanic activity, e.g., via pressurisation, the study of volcanic plumes is proving to be an increasingly fruitful means of improving our understanding of volcanic systems, potentially in concert with observations from geophysics and contributions from fluid dynamical modelling of conduit dynamics.
    Schlagwort(e): Q1-390 ; n/a ; radioactive disequilibria 210Pb-210Bi-210Po ; volcanic geochemistry ; radiative transfer ; spherical-cap bubble ; plume ; satellite remote sensing ; portable photometry ; puffing ; Holuhraun ; interdisciplinary volcanology ; gas slug ; atmospheric remote sensing ; analysis software ; gases ; image processing ; remote sensing ; SEVIRI data ; oxygen and sulfur multi-isotopes ; nonlinear spectral unmixing ; UV cameras ; ultraviolet cameras ; cloud height ; atmospheric chemistry ; Python 2.7 ; degassing processes ; volcanic plumes ; fissure eruption ; radiative forcing ; basaltic volcanism ; volcanic plume top height ; O3 ; eruption start and duration ; Differential Absorption Lidar (DIAL) ; volcanic emissions ; volcanology ; volcanic CO2 flux ; volcanic aerosols ; 2011–2015 Etna lava fountains ; SO2 ; reactive halogen ; nonlinear PCA ; gas ; Etna volcano ; geochemical modelling ; BrO ; volcanic sulfate aerosols ; volcanic gases ; SSA ; hyperspectral remote sensing ; time averaged discharge rate ; eruption monitoring ; Bárðarbunga ; strombolian ; aerosol optical properties ; Mount Etna ; Taylor bubble ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GP Research & information: general
    Sprache: Englisch
    Format: image/jpeg
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2020-03-12
    Beschreibung: The Etna flank eruption that started on 24 December 2018 lasted a few days and involved the opening of an eruptive fissure, accompanied by a seismic swarm and shallow earthquakes, significant SO2 flux release, and by large and widespread ground deformation, especially on the eastern flank of the volcano. Lava fountains and ash plumes from the uppermost eruptive fissure accompanied the opening stage, causing disruption to Catania International Airport, and were followed by a quiet lava effusion within the barren Valle del Bove depression until 27 December. This was the first flank eruption to occur at Etna in the last decade, during which eruptive activity was confined to the summit craters and resulted in lava fountains and lava flow output from the crater rims. In this paper, we used ground and satellite remote sensing techniques to describe the sequence of events, quantify the erupted volumes of lava, gas, and tephra, and assess volcanic hazards.
    Beschreibung: Published
    Beschreibung: id 905
    Beschreibung: 6V. Pericolosità vulcanica e contributi alla stima del rischio
    Beschreibung: JCR Journal
    Schlagwort(e): Etna volcano ; satellite monitoring ; remote sensing ; hazard assessment ; 04.08. Volcanology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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