Cristin-resultat-ID: 1927892
Sist endret: 20. oktober 2021, 10:30
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

Observed interannual changes beneath Filchner-Ronne Ice Shelf linked to large-scale atmospheric circulation

Bidragsytere:
  • Tore Hattermann
  • Keith W. Nicholls
  • Hartmut H. Hellmer
  • Peter E. D. Davis
  • Markus A. Janout
  • Svein Østerhus
  • mfl.

Tidsskrift

Nature Communications
ISSN 2041-1723
e-ISSN 2041-1723
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Volum: 12
Hefte: 1
Sider: 1 - 11
Open Access

Importkilder

Scopus-ID: 2-s2.0-85106259303

Beskrivelse Beskrivelse

Tittel

Observed interannual changes beneath Filchner-Ronne Ice Shelf linked to large-scale atmospheric circulation

Sammendrag

Floating ice shelves are the Achilles’ heel of the Antarctic Ice Sheet. They limit Antarctica’s contribution to global sea level rise, yet they can be rapidly melted from beneath by a warming ocean. At Filchner-Ronne Ice Shelf, a decline in sea ice formation may increase basal melt rates and accelerate marine ice sheet mass loss within this century. However, the understanding of this tipping-point behavior largely relies on numerical models. Our new multi-annual observations from five hot-water drilled boreholes through Filchner-Ronne Ice Shelf show that since 2015 there has been an intensification of the density-driven ice shelf cavity-wide circulation in response to reinforced wind-driven sea ice formation in the Ronne polynya. Enhanced southerly winds over Ronne Ice Shelf coincide with westward displacements of the Amundsen Sea Low position, connecting the cavity circulation with changes in large-scale atmospheric circulation patterns as a new aspect of the atmosphere-ocean-ice shelf system.

Bidragsytere

Tore Hattermann

  • Tilknyttet:
    Forfatter
    ved Norsk Polarinstitutt
  • Tilknyttet:
    Forfatter
    ved Alfred-Wegener-Institut für Polar- und Meeresforschung
  • Tilknyttet:
    Forfatter
    ved Akvaplan-niva AS

Keith W. Nicholls

  • Tilknyttet:
    Forfatter
    ved British Antarctic Survey

Hartmut H. Hellmer

  • Tilknyttet:
    Forfatter
    ved Alfred-Wegener-Institut für Polar- und Meeresforschung

Peter E. D. Davis

  • Tilknyttet:
    Forfatter
    ved British Antarctic Survey

Markus A. Janout

  • Tilknyttet:
    Forfatter
    ved Alfred-Wegener-Institut für Polar- und Meeresforschung
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