Fersiynau electronig

Dangosydd eitem ddigidol (DOI)

  • Michael Meredith
    British Antarctic Survey
  • Mark Inall
    Scottish Association for Marine Science
  • Alexander Brearley
    British Antarctic Survey
  • David Munday
    British Antarctic Survey
  • Tobias Ehmen
    College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, 9 TR10 9EZ, UK.
  • Kate Retallick
  • Amber Annett
    University of Southampton
  • Rhiannon Jones
    University of Southampton
  • Filipa Carvalho
    National Oceanography Centre, Southampton
  • Katrien Van Landeghem
  • Alberto Naveira Garabato
    University of Southampton
  • Laura Gerrish
    British Antarctic Survey
  • James Scourse
    College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, 9 TR10 9EZ, UK.
  • Alison Cook
    Scottish Association for Marine Science
  • Christopher Bull
    Northumbria University
Ocean mixing around Antarctica is a key process that influences the vertical distributions of heat and nutrients, affecting glacier and ice shelf retreats, sea ice formation and marine productivity, with implications for regional ecosystems, global sea level and climate. Here we show that collapsing glacier fronts associated with calving events trigger internal tsunamis, the propagation and breaking of which can lead to significant mixing. Observations of one such event at the West Antarctic Peninsula, during which 3-20 megatonnes of ice were discharged to the ocean, reveal rapidly-elevated internal wave kinetic energy and upper-ocean shear, with strong homogenisation of the water column. Scaling arguments indicate that, at the West Antarctic Peninsula, just a few such events per summer would make this process comparable in magnitude to winds, and much more significant than tides, in driving shelf mixing. We postulate that this process is likely relevant to all regions with calving marine-terminating glaciers, including also Greenland and the Arctic. Glacier calving is expected to increase in a warming climate, likely strengthening internal tsunamigenesis and mixing in these regions in the coming decades.
Iaith wreiddiolSaesneg
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 23 Mai 2022
DigwyddiadThe EGU General Assembly 2022 - Vienna, Vienna, Awstria
Hyd: 23 Mai 202227 Mai 2022
https://www.egu22.eu/

Cynhadledd

CynhadleddThe EGU General Assembly 2022
Gwlad/TiriogaethAwstria
DinasVienna
Cyfnod23/05/2227/05/22
Cyfeiriad rhyngrwyd
Gweld graff cysylltiadau