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
SN - 2375-2548
VL - 8
JO - Science Advances
JF - Science Advances
IS - 47
M1 - eadd0720
ER -