DOI: 10.1016/j.epsl.2020.116684
论文题名: Field-based measurements of volcanic ash resuspension by wind
作者: Del Bello E. ; Taddeucci J. ; Merrison J.P. ; Rasmussen K.R. ; Andronico D. ; Ricci T. ; Scarlato P. ; Iversen J.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 554 语种: 英语
中文关键词: Cordon Caulle volcano
; detachment threshold
; Sakurajima volcano
; volcanic ash
; wind resuspension
; wind tunnel
英文关键词: Deposits
; Shear flow
; Shear stress
; Textures
; Wind tunnels
; Direct measurement
; Field measurement
; Field-based measurements
; Laboratory determinations
; Median grain sizes
; Threshold friction velocities
; Volcanic ash resuspension
; Volcanic eruptions
; Volcanoes
; fieldwork
; threshold
; volcanic ash
; volcanic eruption
; volcanology
; wind shear
; wind tunnel
; Japan
; Kagoshima [Kyushu]
; Kyushu
; Los Rios [Chile]
; Puyehue-Cordon Caulle
; Sakurajima
; Southern Volcanic Zone
英文摘要: The resuspension of volcanic ash by wind is a significant source of hazard during and after volcanic eruptions. Parameterizing and modeling ash resuspension requires direct measurement of the minimum wind shear stress required to move particles, usually expressed as the threshold friction velocity U⁎th, a parameter that, for volcanic ash, has been measured only scarcely and always in the laboratory. Here, we report the first field measurements of U⁎th for volcanic ash, with a portable wind tunnel specifically developed, calibrated, and tested. Field measurements, performed on natural reworked ash deposits from Sakurajima (Japan) and Cordón Caulle (Chile) volcanoes, agree well with our laboratory determinations on ash from the same deposits, with values of U⁎th ranging from 0.13 to 0.38 m/s. Our results show that the median grain size of the deposit and particle shape have a stronger control on U⁎th than the local substratum nature and deposit texture. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165444
Appears in Collections: 气候变化与战略
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作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Roma 1, Via di Vigna Murata 605, Roma, 00143, Italy; Aarhus University, Department of Physics and Astronomy, Ny Munkegade 120, Aarhus C, 8000, Denmark; Aarhus University, Department of Geoscience, Høegh-Guldbergs Gade 2, Aarhus C, 8000, Denmark; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Osservatorio Etneo, Piazza Roma 2, Catania, 95125, Italy
Recommended Citation:
Del Bello E.,Taddeucci J.,Merrison J.P.,et al. Field-based measurements of volcanic ash resuspension by wind[J]. Earth and Planetary Science Letters,2021-01-01,554