Auflistung nach Mitwirkenden "Dingwell, Donald B."
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A novel method for the quantitative morphometric characterization of soluble salts on volcanic ash
Casas, Ana S.; Hornby, Adrian; Poetsch, Carina; Cimarelli, Corrado; Dingwell, Donald B. (Bulletin of Volcanology, 2021-12-06)Formation of soluble sulfate and halide salts on volcanic ash particles via syn-eruptive interactions between ash surfaces and magmatic gases is a ubiquitous phenomenon in explosive eruptions. Surficial salts may be rapidly ... -
Hydrothermal eruption dynamics reflecting vertical variations in host rock geology and geothermal alteration, Champagne Pool, Wai-o-tapu, New Zealand
Gallagher, Anna; Montanaro, Cristian; Cronin, Shane; Scott, Bradley; Dingwell, Donald B.; Scheu, Bettina (Bulletin of Volcanology, 2020-11-14)Hydrothermal eruptions are characterised by violent explosions ejecting steam, water, mud, and rock. They pose a risk to tourism and the operation of power plants in geothermal areas around the world. Large events with a ... -
Linking gas and particle ejection dynamics to boundary conditions in scaled shock-tube experiments
Cigala, Valeria; Kueppers, Ulrich; Fernández, Juan José Peña; Dingwell, Donald B. (Bulletin of Volcanology, 2021-07-20)Predicting the onset, style and duration of explosive volcanic eruptions remains a great challenge. While the fundamental underlying processes are thought to be known, a clear correlation between eruptive features observable ... -
Release characteristics of overpressurised gas from complex vents: implications for volcanic hazards
Schmid, Markus; Kueppers, Ulrich; Cigala, Valeria; Sesterhenn, Jörn; Dingwell, Donald B. (Bulletin of Volcanology, 2020-10-02)Many explosive volcanic eruptions produce underexpanded starting gas-particle jets. The dynamics of the accompanying pyroclast ejection can be affected by several parameters, including magma texture, gas overpressure, ... -
Rheological change and degassing during a trachytic Vulcanian eruption at Kilian Volcano, Chaîne des Puys, France
Colombier, Mathieu; Shea, Thomas; Burgisser, Alain; Druitt, Timothy H.; Gurioli, Lucia; Müller, Dirk; Cáceres, Francisco; Hess, Kai-Uwe; Boivin, Pierre; Miallier, Didier; Dingwell, Donald B. (Bulletin of Volcanology, 2020-11-20)Magma ascent during silicic dome-forming eruptions is characterized by significant changes in magma viscosity, permeability, and gas overpressure in the conduit. These changes depend on a set of parameters such as ascent ... -
Stratigraphic reconstruction of the Víti breccia at Krafla volcano (Iceland): insights into pre-eruptive conditions priming explosive eruptions in geothermal areas
Montanaro, Cristian; Mortensen, Anette Kærgaard; Weisenberger, Tobias B.; Dingwell, Donald B.; Scheu, Bettina (Bulletin of Volcanology, 2021-11-02)Krafla central volcano in Iceland has experienced numerous basaltic fissure eruptions through its history, the most recent examples being the Mývatn (1724‒1729) and Krafla Fires (1975–1984). The Mývatn Fires opened with a ...