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In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. / Farquharson, Jamie I.; Tuffen, Hugh; Wadsworth, Fabian B. et al.
In: Nature Communications, Vol. 13, No. 1, 4713, 11.08.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Farquharson, JI, Tuffen, H, Wadsworth, FB, Castro, JM, Unwin, H & Schipper, CI 2022, 'In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering', Nature Communications, vol. 13, no. 1, 4713. https://doi.org/10.1038/s41467-022-32522-7

APA

Farquharson, J. I., Tuffen, H., Wadsworth, F. B., Castro, J. M., Unwin, H., & Schipper, C. I. (2022). In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. Nature Communications, 13(1), Article 4713. https://doi.org/10.1038/s41467-022-32522-7

Vancouver

Farquharson JI, Tuffen H, Wadsworth FB, Castro JM, Unwin H, Schipper CI. In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. Nature Communications. 2022 Aug 11;13(1):4713. doi: 10.1038/s41467-022-32522-7

Author

Farquharson, Jamie I. ; Tuffen, Hugh ; Wadsworth, Fabian B. et al. / In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. In: Nature Communications. 2022 ; Vol. 13, No. 1.

Bibtex

@article{d1f8dcf8ef6e4c2bab8f170f367121ee,
title = "In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering",
abstract = "Ash emission in explosive silicic eruptions can have widespread impacts for human health, agriculture, infrastructure, and aviation. Estimates of the total grainsize distribution (TGSD) generated during explosive magma fragmentation underpins eruption models and ash dispersal forecasts. Conventionally, the TGSD constrained via erupted deposits is assumed to match the TGSD produced at explosive fragmentation. Here we present observations from within the vent of a recent rhyolitic eruption (Cord{\'o}n Caulle, Chile, 2011–2012), demonstrating that fine (<63 μm diameter) and ultra-fine (<2.5 μm diameter) ash particles are captured and sintered to fracture surfaces, and thus sequestered in the shallow subsurface, rather than emitted. We establish a conceptual model—uniquely contextualised through a combination of syn-eruptive observations and detailed post-eruption field investigation—in which turbophoresis (particle migration towards zones of lower turbulence) and rapid sintering create an inverse relationship between particle size and the probability of its subsurface capture. Such size-dependent capture efficiency preferentially removes submicron-diameter ash from the erupted componentry, decoupling the erupted size distribution from magmatic source conditions and potentially playing an important role in modulating eruption dynamics.",
keywords = "General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Multidisciplinary",
author = "Farquharson, {Jamie I.} and Hugh Tuffen and Wadsworth, {Fabian B.} and Castro, {Jonathan M.} and Holly Unwin and Schipper, {C. Ian}",
year = "2022",
month = aug,
day = "11",
doi = "10.1038/s41467-022-32522-7",
language = "English",
volume = "13",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",

}

RIS

TY - JOUR

T1 - In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering

AU - Farquharson, Jamie I.

AU - Tuffen, Hugh

AU - Wadsworth, Fabian B.

AU - Castro, Jonathan M.

AU - Unwin, Holly

AU - Schipper, C. Ian

PY - 2022/8/11

Y1 - 2022/8/11

N2 - Ash emission in explosive silicic eruptions can have widespread impacts for human health, agriculture, infrastructure, and aviation. Estimates of the total grainsize distribution (TGSD) generated during explosive magma fragmentation underpins eruption models and ash dispersal forecasts. Conventionally, the TGSD constrained via erupted deposits is assumed to match the TGSD produced at explosive fragmentation. Here we present observations from within the vent of a recent rhyolitic eruption (Cordón Caulle, Chile, 2011–2012), demonstrating that fine (<63 μm diameter) and ultra-fine (<2.5 μm diameter) ash particles are captured and sintered to fracture surfaces, and thus sequestered in the shallow subsurface, rather than emitted. We establish a conceptual model—uniquely contextualised through a combination of syn-eruptive observations and detailed post-eruption field investigation—in which turbophoresis (particle migration towards zones of lower turbulence) and rapid sintering create an inverse relationship between particle size and the probability of its subsurface capture. Such size-dependent capture efficiency preferentially removes submicron-diameter ash from the erupted componentry, decoupling the erupted size distribution from magmatic source conditions and potentially playing an important role in modulating eruption dynamics.

AB - Ash emission in explosive silicic eruptions can have widespread impacts for human health, agriculture, infrastructure, and aviation. Estimates of the total grainsize distribution (TGSD) generated during explosive magma fragmentation underpins eruption models and ash dispersal forecasts. Conventionally, the TGSD constrained via erupted deposits is assumed to match the TGSD produced at explosive fragmentation. Here we present observations from within the vent of a recent rhyolitic eruption (Cordón Caulle, Chile, 2011–2012), demonstrating that fine (<63 μm diameter) and ultra-fine (<2.5 μm diameter) ash particles are captured and sintered to fracture surfaces, and thus sequestered in the shallow subsurface, rather than emitted. We establish a conceptual model—uniquely contextualised through a combination of syn-eruptive observations and detailed post-eruption field investigation—in which turbophoresis (particle migration towards zones of lower turbulence) and rapid sintering create an inverse relationship between particle size and the probability of its subsurface capture. Such size-dependent capture efficiency preferentially removes submicron-diameter ash from the erupted componentry, decoupling the erupted size distribution from magmatic source conditions and potentially playing an important role in modulating eruption dynamics.

KW - General Physics and Astronomy

KW - General Biochemistry, Genetics and Molecular Biology

KW - General Chemistry

KW - Multidisciplinary

U2 - 10.1038/s41467-022-32522-7

DO - 10.1038/s41467-022-32522-7

M3 - Journal article

VL - 13

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 4713

ER -