Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Kai-Uwe Hess"'
Autor:
Francisco Cáceres, Kai-Uwe Hess, Michael Eitel, Markus Döblinger, Kelly N. McCartney, Mathieu Colombier, Stuart A. Gilder, Bettina Scheu, Melanie Kaliwoda, Donald B. Dingwell
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Explosivity in erupting volcanoes is controlled by the degassing dynamics and the viscosity of the ascending magma in the conduit. Magma crystallisation enhances both heterogeneous bubble nucleation and increases in magma bulk viscosity. Nan
Externí odkaz:
https://doaj.org/article/b3cb2557194a4c2eb830534b4631399b
Autor:
Simon Thivet, Luiz Pereira, Nicolas Menguy, Étienne Médard, Pauline Verdurme, Carole Berthod, David Troadec, Kai-Uwe Hess, Donald B. Dingwell, Jean-Christophe Komorowski
Publikováno v:
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-14 (2023)
Abstract Nanoscale liquid immiscibility is observed in the 2018–2021 Fani Maoré submarine lavas (Comoros archipelago). Heat transfer calculations, Raman spectroscopy, scanning and transmission electron microscopy reveal that in contrast to thin (5
Externí odkaz:
https://doaj.org/article/103caffecef84c8f8e0fb9fe04b5d4c9
Autor:
A. Zeynep Çalışkanoğlu, Alessandra S. B. Camara, Corrado Cimarelli, Donald B. Dingwell, Kai-Uwe Hess
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract Fulgurites have been documented in geological deposits from throughout Earth's history. They have also been assigned a potential role in prebiotic chemistry as a source of reactants. Fulgurites are generated in nature by cloud-to-ground ligh
Externí odkaz:
https://doaj.org/article/99f8feb4442a43d69f70642a953a8d57
Autor:
Fabian Ben Wadsworth, Edward Llewellin, Colin Rennie, Cate Watkinson, Jo Mitchell, Jeremie Vasseur, Alastair Mackie, Fleur Mackie, Alexandra Carr, Tobias Schmiedel, Taylor Witcher, Arianna Soldati, Lucy Jackson, Annabelle Foster, Kai-Uwe Hess, Donald Dingwell, Russell Hand
Publikováno v:
Volcanica, Vol 5, Iss 1, Pp 183-207 (2022)
Glass art practice is indivisible from the material behaviour of glass at a range of working conditions, providing a direct link with the science of glass and melts. The use of non-standard, non-commercial, or natural glass compositions in art usuall
Externí odkaz:
https://doaj.org/article/da5124a8b24649d1986babe8509a4c90
Autor:
Gilles Seropian, Ben M. Kennedy, Jackie E. Kendrick, Yan Lavallée, Alexander R. L. Nichols, Felix W. von Aulock, Donald B. Dingwell, Kai-Uwe Hess, Anthony Lamur, Jenny Schauroth, Jérémie Vasseur, Fabian B. Wadsworth
Publikováno v:
Frontiers in Earth Science, Vol 10 (2022)
Magma ascending in the Earth’s crust can undergo oscillations in pressure, from ultra-low frequency changes associated with tectonics, to relatively higher frequency oscillations associated with seismicity. Seismic waves travelling through shallow
Externí odkaz:
https://doaj.org/article/3fa73c5b0092488ebf9fa9f83d6b7ad4
Combined effusive-explosive silicic volcanism straddles the multiphase viscous-to-brittle transition
Autor:
Fabian B. Wadsworth, Taylor Witcher, Caron E. J. Vossen, Kai-Uwe Hess, Holly E. Unwin, Bettina Scheu, Jonathan M. Castro, Donald B. Dingwell
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-8 (2018)
Recent observations of silicic eruptions show that they can be both effusive and explosive at the same time. Here the authors use scaled experiments to demonstrate that magma in effusive eruptions will fracture during flow to the Earth’s surface, a
Externí odkaz:
https://doaj.org/article/f36cf565606e478cb8d9ee4e05277ecb
Autor:
Guilhem Amin Douillet, Ulrich Kueppers, Célia Mato, Quentin Chaffaut, Mélanie Bouysson, Renate Reschetizka, Inga Hoelscher, Patrick Witting, Kai-Uwe Hess, Alexander Cerwenka, Donald B Dingwell, Benjamin Bernard
Publikováno v:
Journal of Applied Volcanology, Vol 7, Iss 1, Pp 1-13 (2018)
Abstract Pyroclastic sedimentary successions record an eruptive history modulated by transport and depositional phases. Here, a field technique of outcrop impregnation was used to document pyroclastic sediments at the scale of individual laminae. The
Externí odkaz:
https://doaj.org/article/da9b6c2484204223aea74e30b01d1e67
Publikováno v:
Frontiers in Earth Science, Vol 8 (2020)
Large volcanic eruptions are frequently triggered by the intrusion of hot primitive magma into a more evolved magma-chamber or -mush zone. During intrusion into the cooler mush zone, the basaltic magma undergoes crystallization, which in turn can rel
Externí odkaz:
https://doaj.org/article/0a9500e8ce7645b783433e78ef8d83ef
Autor:
Wenjia Song, Yan Lavallée, Kai-Uwe Hess, Ulrich Kueppers, Corrado Cimarelli, Donald B. Dingwell
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-10 (2016)
Volcanic ash is hazardous to jet engines, with high temperatures in turbines causing ash particles to melt and stick to the engine, adversely affecting turbine function. Here, the authors explore the spectrum of natural ash compositions and their beh
Externí odkaz:
https://doaj.org/article/49a01241b19f4bb78fb30b6a2a732f33
Autor:
Lucy E. Jackson, Fabian B. Wadsworth, Joanne Mitchell, Colin Rennie, Edward W. Llewellin, Kai‐Uwe Hess, Donald B. Dingwell
Publikováno v:
Journal of the American Ceramic Society, 2022, Vol.105(12), pp.7238-7253 [Peer Reviewed Journal]
The Hadamard–Rybczynski equation describes the steady-state buoyant rise velocity of an unconfined spherical bubble in a viscous liquid. This solution has been experimentally validated for the case where the liquid viscosity is held constant. Here,