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Identifying rheological regimes within pyroclastic density currents

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Identifying rheological regimes within pyroclastic density currents. / Jones, Thomas. J.; Shetty, Abhishek; Chalk, Caitlin et al.
In: Nature Communications, Vol. 15, No. 1, 4401, 23.05.2024.

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

Harvard

Jones, TJ, Shetty, A, Chalk, C, Dufek, J & Gonnermann, HM 2024, 'Identifying rheological regimes within pyroclastic density currents', Nature Communications, vol. 15, no. 1, 4401. https://doi.org/10.1038/s41467-024-48612-7

APA

Jones, T. J., Shetty, A., Chalk, C., Dufek, J., & Gonnermann, H. M. (2024). Identifying rheological regimes within pyroclastic density currents. Nature Communications, 15(1), Article 4401. https://doi.org/10.1038/s41467-024-48612-7

Vancouver

Jones TJ, Shetty A, Chalk C, Dufek J, Gonnermann HM. Identifying rheological regimes within pyroclastic density currents. Nature Communications. 2024 May 23;15(1):4401. doi: 10.1038/s41467-024-48612-7

Author

Jones, Thomas. J. ; Shetty, Abhishek ; Chalk, Caitlin et al. / Identifying rheological regimes within pyroclastic density currents. In: Nature Communications. 2024 ; Vol. 15, No. 1.

Bibtex

@article{9d5b15d008634fdc9b67c125b4777e59,
title = "Identifying rheological regimes within pyroclastic density currents",
abstract = "Pyroclastic density currents (PDCs) are the most lethal of all volcanic hazards. An ongoing challenge is to accurately forecast their run-out distance such that effective mitigation strategies can be implemented. Central to this goal is an understanding of the flow mobility—a quantitative rheological model detailing how the high temperature gas-pyroclast mixtures propagate. This is currently unknown, yet critical to accurately forecast the run-out distance. Here, we use a laboratory apparatus to perform rheological measurements on real gas-pyroclast mixtures at dynamic conditions found in concentrated to intermediate pumice-rich PDCs. We find their rheology to be non-Newtonian featuring (i) a yield stress where deposition occurs; (ii) shear-thinning behavior that promotes channel formation and local increases in velocity and (iii) shear-thickening behavior that promotes decoupling and potential co-PDC plume formation. We provide a universal regime diagram delineating these behaviors and illustrating how flow can transition between them during transport.",
author = "Jones, {Thomas. J.} and Abhishek Shetty and Caitlin Chalk and Josef Dufek and Gonnermann, {Helge M.}",
year = "2024",
month = may,
day = "23",
doi = "10.1038/s41467-024-48612-7",
language = "English",
volume = "15",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",

}

RIS

TY - JOUR

T1 - Identifying rheological regimes within pyroclastic density currents

AU - Jones, Thomas. J.

AU - Shetty, Abhishek

AU - Chalk, Caitlin

AU - Dufek, Josef

AU - Gonnermann, Helge M.

PY - 2024/5/23

Y1 - 2024/5/23

N2 - Pyroclastic density currents (PDCs) are the most lethal of all volcanic hazards. An ongoing challenge is to accurately forecast their run-out distance such that effective mitigation strategies can be implemented. Central to this goal is an understanding of the flow mobility—a quantitative rheological model detailing how the high temperature gas-pyroclast mixtures propagate. This is currently unknown, yet critical to accurately forecast the run-out distance. Here, we use a laboratory apparatus to perform rheological measurements on real gas-pyroclast mixtures at dynamic conditions found in concentrated to intermediate pumice-rich PDCs. We find their rheology to be non-Newtonian featuring (i) a yield stress where deposition occurs; (ii) shear-thinning behavior that promotes channel formation and local increases in velocity and (iii) shear-thickening behavior that promotes decoupling and potential co-PDC plume formation. We provide a universal regime diagram delineating these behaviors and illustrating how flow can transition between them during transport.

AB - Pyroclastic density currents (PDCs) are the most lethal of all volcanic hazards. An ongoing challenge is to accurately forecast their run-out distance such that effective mitigation strategies can be implemented. Central to this goal is an understanding of the flow mobility—a quantitative rheological model detailing how the high temperature gas-pyroclast mixtures propagate. This is currently unknown, yet critical to accurately forecast the run-out distance. Here, we use a laboratory apparatus to perform rheological measurements on real gas-pyroclast mixtures at dynamic conditions found in concentrated to intermediate pumice-rich PDCs. We find their rheology to be non-Newtonian featuring (i) a yield stress where deposition occurs; (ii) shear-thinning behavior that promotes channel formation and local increases in velocity and (iii) shear-thickening behavior that promotes decoupling and potential co-PDC plume formation. We provide a universal regime diagram delineating these behaviors and illustrating how flow can transition between them during transport.

U2 - 10.1038/s41467-024-48612-7

DO - 10.1038/s41467-024-48612-7

M3 - Journal article

VL - 15

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 4401

ER -