Internal tsunamigenesis and ocean mixing driven by glacier calving in Antarctica

This is the final version. Available on open access from AAAS via the DOI in this record Data and materials availability: Cruise data used here are archived with the British Oceanographic Data Centre and are available at www.bodc.ac.uk/data/published_data_library/catalogue/10.5285/d9633a6c-d27e-30b4...

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Bibliographic Details
Published in:Science Advances
Main Authors: 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
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2022
Subjects:
Antarctic
Antarctic Peninsula
Arctic
Greenland
The Antarctic
Antarc*
Antarctica
glacier
Ice Shelf
Sea ice
Online Access:http://hdl.handle.net/10871/131927
https://doi.org/10.1126/sciadv.add0720
Description
Summary:This is the final version. Available on open access from AAAS via the DOI in this record Data and materials availability: Cruise data used here are archived with the British Oceanographic Data Centre and are available at www.bodc.ac.uk/data/published_data_library/catalogue/10.5285/d9633a6c-d27e-30b4-e053-6c86abc07104 (DOI:10.5285/d9633a6c-d27e-30b4-e053-6c86abc07104). The multibeam bathymetry data are available at 5-m gridded resolution at https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01511. ETOPO1 bathymetry is available at https://catalog.data.gov/dataset/etopo1-1-arc-minute-global-relief-model (DOI: 0.7289/V5C8276M). The Reference Elevation Model of Antarctica is available at www.pgc.umn.edu/data/rema/. Previously published datasets used here are cited accordingly in the main text. Sentinel-1 SAR data are openly available through the ESA-EC Copernicus Open Access Hub (https://scihub.copernicus.eu/dhus/#/home). MITgcm code is available at https://zenodo.org/record/3967889#.Yhjimi-l0ws (DOI:10.5281/zenodo.3967889). CODAS is available at https://currents.soest.hawaii.edu/docs/adcp_doc/codas_setup/index.html. All data needed to evaluate the conclusions in the paper are present in the paper and/or the Supplementary Materials. 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 ...

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