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Institut for Fysik og Astronomi

Jens Jacob Iversen

Field-based measurements of volcanic ash resuspension by wind

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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Field-based measurements of volcanic ash resuspension by wind. / Del Bello, E.; Taddeucci, J.; Merrison, Jonathan P. et al.

I: Earth and Planetary Science Letters, Bind 554, 116684, 01.2021.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

Vancouver

Del Bello E, Taddeucci J, Merrison JP , Rasmussen KR, Andronico D, Ricci T et al. Field-based measurements of volcanic ash resuspension by wind. Earth and Planetary Science Letters. 2021 jan.;554:116684. doi: 10.1016/j.epsl.2020.116684

Author

Del Bello, E. ; Taddeucci, J. ; Merrison, Jonathan P. et al. / Field-based measurements of volcanic ash resuspension by wind. I: Earth and Planetary Science Letters. 2021 ; Bind 554.

Bibtex

@article{bb8586d275794676810be096d4d9e392,

title = "Field-based measurements of volcanic ash resuspension by wind",

abstract = "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 Cord{\'o}n 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. ",

keywords = "Cordon Caulle volcano, Sakurajima volcano, detachment threshold, volcanic ash, wind resuspension, wind tunnel",

author = "{Del Bello}, E. and J. Taddeucci and Merrison, {Jonathan P.} and Rasmussen, {Keld R{\o}mer} and D. Andronico and T. Ricci and P. Scarlato and Iversen, {Jens Jacob}",

year = "2021",

month = jan,

doi = "10.1016/j.epsl.2020.116684",

language = "English",

volume = "554",

journal = "Earth and Planetary Science Letters",

issn = "0012-821X",

publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Field-based measurements of volcanic ash resuspension by wind

AU - Del Bello, E.

AU - Taddeucci, J.

AU - Merrison, Jonathan P.

AU - Rasmussen, Keld Rømer

AU - Andronico, D.

AU - Ricci, T.

AU - Scarlato, P.

AU - Iversen, Jens Jacob

PY - 2021/1

Y1 - 2021/1

N2 - 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.

AB - 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.

KW - Cordon Caulle volcano

KW - Sakurajima volcano

KW - detachment threshold

KW - volcanic ash

KW - wind resuspension

KW - wind tunnel

UR - http://www.scopus.com/inward/record.url?scp=85097579407&partnerID=8YFLogxK

U2 - 10.1016/j.epsl.2020.116684

DO - 10.1016/j.epsl.2020.116684

M3 - Journal article

VL - 554

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

SN - 0012-821X

M1 - 116684

ER -