Zobrazeno 1 - 10
of 31
pro vyhledávání: '"B. J. Devenish"'
Publikováno v:
Atmospheric chemistry and physics, Vol. 22, No 5 (2022) pp. 3409-3431
We have developed an aggregation scheme for use with the Lagrangian atmospheric transport and dispersion model NAME (Numerical Atmospheric Dispersion modelling Environment), which is used by the London Volcanic Ash Advisory Centre (VAAC) to provide a
Autor:
David J. Thomson, B. J. Devenish
Publikováno v:
Journal of Fluid Mechanics. 867:877-905
We present an extension of Thomson’s (J. Fluid Mech., vol. 210, 1990, pp. 113–153) two-particle Lagrangian stochastic model that is constructed to be consistent with the $4/5$ law of turbulence. The rate of separation in the new model is reduced
Autor:
David J. Thomson, Susan Leadbetter, Helen N. Webster, Claire Witham, Matthew C. Hort, B. J. Devenish, Ric Crocker, Frances Beckett, Andrew Jones
It has been 10 years since the ash cloud from the eruption of Eyjafjallajökull caused chaos to air traffic across Europe. Although disruptive, the longevity of the event afforded the scientific community the opportunity to observe and extensively st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fa2b6fcfb1e19eb053a3047ad9d6d8b
https://doi.org/10.5194/egusphere-egu2020-4774
https://doi.org/10.5194/egusphere-egu2020-4774
Publikováno v:
Atmosphere
Volume 11
Issue 2
Atmosphere, Vol 11, Iss 2, p 200 (2020)
Volume 11
Issue 2
Atmosphere, Vol 11, Iss 2, p 200 (2020)
Large explosive eruptions can result in the formation of an umbrella cloud which rapidly expands, spreading ash out radially from the volcano. The lateral spread by the intrusive gravity current dominates the transport of the ash cloud. Hence, to acc
Autor:
Matteo Cerminara, B. J. Devenish
Publikováno v:
Journal of Geophysical Research: Atmospheres
We develop a Lagrangian stochastic model (LSM) of a volcanic plume in which the mean flow is provided by an integral plume model of the eruption column and fluctuations in the vertical velocity are modelled by a suitably constructed stochastic differ
Autor:
B. J. Devenish, Matteo Cerminara
Publikováno v:
Journal of Geophysical Research: Solid Earth.
Autor:
B. J. Devenish
Publikováno v:
Journal of Volcanology and Geothermal Research. 326:114-119
The volcanic plume-rise model of Devenish (2013) is applied to the duration of the 39-day eruption of Eyjafjallajokull in 2010 to produce a time series of the estimated source mass flux. This in turn is integrated to give the total emitted mass, whic
Publikováno v:
Journal of the Atmospheric Sciences. 73:3453-3465
Approximate solutions of the supersaturation equation are derived for a warm cloud. These solutions take account of the growth of the droplet radius but are only valid for small times. However, the validity of the solutions extends far enough to obta
Autor:
Andrea Bisignano, B. J. Devenish
Publikováno v:
Boundary-Layer Meteorology. 157:157-172
We present a hybrid Lagrangian stochastic model for buoyant plume rise from an isolated source that includes the effects of temperature fluctuations. The model is based on that of Webster and Thomson (Atmos Environ 36:5031–5042, 2002) in that it is
Autor:
G. G. Rooney, B. J. Devenish
Publikováno v:
Geophysical & Astrophysical Fluid Dynamics. 108:168-190
We present analyses of plume rise into a linearly stratified environment, either with or without a uniform horizontal flow. In the case of a still ambient, we collate results on plume spreading height and volume flux, enabling the speed of the spread