Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica

Michael P. Meredith; Mark E. Inall; J. Alexander Brearley; Tobias Ehmen; Katy Sheen; David Munday; Alison Cook; Katherine Retallick; Katrien Van Landeghem; Laura Gerrish; Amber Annett; Filipa Carvalho; Rhiannon Jones; Alberto C. Naveira Garabato; Christopher Y. S. Bull; Benjamin J. Wallis; Anna E. Hogg; James Scourse

doi:10.1126/sciadv.add0720

Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica

Michael P. Meredith^*, Mark E. Inall, J. Alexander Brearley, Tobias Ehmen, Katy Sheen, David Munday, Alison Cook, Katherine Retallick, Katrien Van Landeghem, Laura Gerrish, Amber Annett, Filipa Carvalho, Rhiannon Jones, Alberto C. Naveira Garabato, Christopher Y. S. Bull, Benjamin J. Wallis, Anna E. Hogg, James Scourse

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Geography and Environmental Sciences

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Abstract

Ocean mixing around Antarctica exerts key influences on glacier dynamics and ice shelf retreats, sea ice, and marine productivity, thus affecting global sea level and climate. The conventional paradigm is that this is dominated by winds, tides, and buoyancy forcing. Direct observations from the Antarctic Peninsula demonstrate that glacier calving triggers internal tsunamis, the breaking of which drives vigorous mixing. Being widespread and frequent, these internal tsunamis are at least comparable to winds, and much more important than tides, in driving regional shelf mixing. They are likely relevant everywhere that marine-terminating glaciers calve, including Greenland and across the Arctic. Calving frequency may change with higher ocean temperatures, suggesting possible shifts to internal tsunamigenesis and mixing in a warming climate.

Original language	English
Article number	eadd0720
Number of pages	10
Journal	Science Advances
Volume	8
Issue number	47
Early online date	23 Nov 2022
DOIs	https://doi.org/10.1126/sciadv.add0720
Publication status	Published - 25 Nov 2022

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Meredith, M. P., Inall, M. E., Brearley, J. A., Ehmen, T., Sheen, K., Munday, D., Cook, A., Retallick, K., Van Landeghem, K., Gerrish, L., Annett, A., Carvalho, F., Jones, R., Naveira Garabato, A. C., Bull, C. Y. S., Wallis, B. J., Hogg, A. E., & Scourse, J. (2022). Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica. Science Advances, 8(47), [eadd0720]. https://doi.org/10.1126/sciadv.add0720

@article{1cc646b7db694d5a861713522e8c223a,

title = "Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica",

abstract = "Ocean mixing around Antarctica exerts key influences on glacier dynamics and ice shelf retreats, sea ice, and marine productivity, thus affecting global sea level and climate. The conventional paradigm is that this is dominated by winds, tides, and buoyancy forcing. Direct observations from the Antarctic Peninsula demonstrate that glacier calving triggers internal tsunamis, the breaking of which drives vigorous mixing. Being widespread and frequent, these internal tsunamis are at least comparable to winds, and much more important than tides, in driving regional shelf mixing. They are likely relevant everywhere that marine-terminating glaciers calve, including Greenland and across the Arctic. Calving frequency may change with higher ocean temperatures, suggesting possible shifts to internal tsunamigenesis and mixing in a warming climate.",

author = "Meredith, {Michael P.} and Inall, {Mark E.} and Brearley, {J. Alexander} and Tobias Ehmen and Katy Sheen and David Munday and Alison Cook and Katherine Retallick and {Van Landeghem}, Katrien and Laura Gerrish and Amber Annett and Filipa Carvalho and Rhiannon Jones and {Naveira Garabato}, {Alberto C.} and Bull, {Christopher Y. S.} and Wallis, {Benjamin J.} and Hogg, {Anna E.} and James Scourse",

note = "Funding information: This work was supported by the Natural Environment Research Council/CONICYT grants NE/P003087/1 and NE/P003060/1 (ICEBERGS) (to J.S., K.S., K.V.L., and M.P.M.), the European Union Horizon 2020 Research and Innovation Programme grant no. 821001 (SO-CHIC) (to M.P.M., J.A.B., and A.C.N.G.), the Natural Environment Research Council grant NE/N018095/1 (ORCHESTRA) (to M.P.M., J.A.B., and D.M.), the Natural Environment Research Council grant NE/V013254/1 (ENCORE) (to M.P.M., J.A.B., and D.M.), the Natural Environment Research Council grant NE/R016038/1 (BAS LTSS; RaTS) (to M.P.M. and J.A.B.), the Natural Environment Research Council grant NE/L003287/1 (PycnMix) (to M.E.I.), the Natural Environment Research Council grant NE/L011166/1 (Independent Research Fellowship) (to J.A.B.), the European Union{\textquoteright}s Horizon 2020 Research and Innovation Programme grant agreement no. 820575 (TiPACCs) (to C.Y.S.B.), the Natural Environment Research Council NEXUSS Centre for Doctoral Training (NE/L002531/1) (to T.E.), the College of Life and Environmental Science at the University of Exeter (to T.E.), the Natural Environment Research Council Independent Research Fellowship NE/P017630/1 (to A.A.), the Natural Environment Research Council INSPIRE Doctoral Training Partnership (RLCJ), the Harry Elderfield Memorial Scholarship (to R.J.), the Natural Environment Research Council PANORAMA Doctoral Training Partnership grant NE/S007458/1 (to B.J.W.), the European Space Agency Polar+ Ice Shelves project (ESA contract number 4000132186/20/I-EF) (to A.E.H.), the European Space Agency Polar+ SO-ICE project (ESA contract number 4000135062/21/I-NB) (to A.E.H. and M.P.M.), and the European Research Council Consolidator Grant (GOCART, 754 agreement number 724416) (to F.C.).",

year = "2022",

month = nov,

day = "25",

doi = "10.1126/sciadv.add0720",

language = "English",

volume = "8",

journal = "Science advances",

issn = "2375-2548",

publisher = "American Association for the Advancement of Science",

number = "47",

}

Meredith, MP, Inall, ME, Brearley, JA, Ehmen, T, Sheen, K, Munday, D, Cook, A, Retallick, K, Van Landeghem, K, Gerrish, L, Annett, A, Carvalho, F, Jones, R, Naveira Garabato, AC, Bull, CYS, Wallis, BJ, Hogg, AE & Scourse, J 2022, 'Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica', Science Advances, vol. 8, no. 47, eadd0720. https://doi.org/10.1126/sciadv.add0720

TY - JOUR

T1 - Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica

AU - Meredith, Michael P.

AU - Inall, Mark E.

AU - Brearley, J. Alexander

AU - Ehmen, Tobias

AU - Sheen, Katy

AU - Munday, David

AU - Cook, Alison

AU - Retallick, Katherine

AU - Van Landeghem, Katrien

AU - Gerrish, Laura

AU - Annett, Amber

AU - Carvalho, Filipa

AU - Jones, Rhiannon

AU - Naveira Garabato, Alberto C.

AU - Bull, Christopher Y. S.

AU - Wallis, Benjamin J.

AU - Hogg, Anna E.

AU - Scourse, James

N1 - Funding information: This work was supported by the Natural Environment Research Council/CONICYT grants NE/P003087/1 and NE/P003060/1 (ICEBERGS) (to J.S., K.S., K.V.L., and M.P.M.), the European Union Horizon 2020 Research and Innovation Programme grant no. 821001 (SO-CHIC) (to M.P.M., J.A.B., and A.C.N.G.), the Natural Environment Research Council grant NE/N018095/1 (ORCHESTRA) (to M.P.M., J.A.B., and D.M.), the Natural Environment Research Council grant NE/V013254/1 (ENCORE) (to M.P.M., J.A.B., and D.M.), the Natural Environment Research Council grant NE/R016038/1 (BAS LTSS; RaTS) (to M.P.M. and J.A.B.), the Natural Environment Research Council grant NE/L003287/1 (PycnMix) (to M.E.I.), the Natural Environment Research Council grant NE/L011166/1 (Independent Research Fellowship) (to J.A.B.), the European Union’s Horizon 2020 Research and Innovation Programme grant agreement no. 820575 (TiPACCs) (to C.Y.S.B.), the Natural Environment Research Council NEXUSS Centre for Doctoral Training (NE/L002531/1) (to T.E.), the College of Life and Environmental Science at the University of Exeter (to T.E.), the Natural Environment Research Council Independent Research Fellowship NE/P017630/1 (to A.A.), the Natural Environment Research Council INSPIRE Doctoral Training Partnership (RLCJ), the Harry Elderfield Memorial Scholarship (to R.J.), the Natural Environment Research Council PANORAMA Doctoral Training Partnership grant NE/S007458/1 (to B.J.W.), the European Space Agency Polar+ Ice Shelves project (ESA contract number 4000132186/20/I-EF) (to A.E.H.), the European Space Agency Polar+ SO-ICE project (ESA contract number 4000135062/21/I-NB) (to A.E.H. and M.P.M.), and the European Research Council Consolidator Grant (GOCART, 754 agreement number 724416) (to F.C.).

PY - 2022/11/25

Y1 - 2022/11/25

N2 - Ocean mixing around Antarctica exerts key influences on glacier dynamics and ice shelf retreats, sea ice, and marine productivity, thus affecting global sea level and climate. The conventional paradigm is that this is dominated by winds, tides, and buoyancy forcing. Direct observations from the Antarctic Peninsula demonstrate that glacier calving triggers internal tsunamis, the breaking of which drives vigorous mixing. Being widespread and frequent, these internal tsunamis are at least comparable to winds, and much more important than tides, in driving regional shelf mixing. They are likely relevant everywhere that marine-terminating glaciers calve, including Greenland and across the Arctic. Calving frequency may change with higher ocean temperatures, suggesting possible shifts to internal tsunamigenesis and mixing in a warming climate.

AB - Ocean mixing around Antarctica exerts key influences on glacier dynamics and ice shelf retreats, sea ice, and marine productivity, thus affecting global sea level and climate. The conventional paradigm is that this is dominated by winds, tides, and buoyancy forcing. Direct observations from the Antarctic Peninsula demonstrate that glacier calving triggers internal tsunamis, the breaking of which drives vigorous mixing. Being widespread and frequent, these internal tsunamis are at least comparable to winds, and much more important than tides, in driving regional shelf mixing. They are likely relevant everywhere that marine-terminating glaciers calve, including Greenland and across the Arctic. Calving frequency may change with higher ocean temperatures, suggesting possible shifts to internal tsunamigenesis and mixing in a warming climate.

U2 - 10.1126/sciadv.add0720

DO - 10.1126/sciadv.add0720

M3 - Article

VL - 8

JO - Science advances

JF - Science advances

SN - 2375-2548

IS - 47

M1 - eadd0720

ER -

Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica

Abstract

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