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West Antarctic Ice Sheet retreat driven by Holocene warm water incursions.
Hillenbrand, Claus-Dieter; Smith, James A; Hodell, David A; Greaves, Mervyn; Poole, Christopher R; Kender, Sev; Williams, Mark; Andersen, Thorbjørn Joest; Jernas, Patrycja E; Elderfield, Henry; Klages, Johann P; Roberts, Stephen J; Gohl, Karsten; Larter, Robert D; Kuhn, Gerhard.
Afiliación
  • Hillenbrand CD; British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
  • Smith JA; British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
  • Hodell DA; Department of Earth Sciences, Cambridge University, Downing Street, Cambridge CB2 3EQ, UK.
  • Greaves M; Department of Earth Sciences, Cambridge University, Downing Street, Cambridge CB2 3EQ, UK.
  • Poole CR; Department of Geology, University of Leicester, Leicester LE1 7RH, UK.
  • Kender S; Department of Earth Sciences, University College London, London WC1E 6BT, UK.
  • Williams M; Camborne School of Mines, University of Exeter, Penryn, Cornwall TR10 9FE, UK.
  • Andersen TJ; British Geological Survey, Keyworth, Nottingham NG12 5GG, UK.
  • Jernas PE; Department of Geology, University of Leicester, Leicester LE1 7RH, UK.
  • Elderfield H; Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, DK-1350 Copenhagen K, Denmark.
  • Klages JP; Department of Geosciences, University of Tromsø - The Arctic University of Norway, N-9037 Tromsø, Norway.
  • Roberts SJ; Department of Earth Sciences, Cambridge University, Downing Street, Cambridge CB2 3EQ, UK.
  • Gohl K; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany.
  • Larter RD; British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK.
  • Kuhn G; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Department of Geosciences, Am Alten Hafen 26, D-27568 Bremerhaven, Germany.
Nature ; 547(7661): 43-48, 2017 07 05.
Article en En | MEDLINE | ID: mdl-28682333
Glaciological and oceanographic observations coupled with numerical models show that warm Circumpolar Deep Water (CDW) incursions onto the West Antarctic continental shelf cause melting of the undersides of floating ice shelves. Because these ice shelves buttress glaciers feeding into them, their ocean-induced thinning is driving Antarctic ice-sheet retreat today. Here we present a multi-proxy data based reconstruction of variability in CDW inflow to the Amundsen Sea sector, the most vulnerable part of the West Antarctic Ice Sheet, during the Holocene epoch (from 11.7 thousand years ago to the present). The chemical compositions of foraminifer shells and benthic foraminifer assemblages in marine sediments indicate that enhanced CDW upwelling, controlled by the latitudinal position of the Southern Hemisphere westerly winds, forced deglaciation of this sector from at least 10,400 years ago until 7,500 years ago-when an ice-shelf collapse may have caused rapid ice-sheet thinning further upstream-and since the 1940s. These results increase confidence in the predictive capability of current ice-sheet models.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Agua de Mar / Viento / Cubierta de Hielo / Calentamiento Global / Congelación / Calor / Modelos Teóricos Tipo de estudio: Prognostic_studies Idioma: En Revista: Nature Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Agua de Mar / Viento / Cubierta de Hielo / Calentamiento Global / Congelación / Calor / Modelos Teóricos Tipo de estudio: Prognostic_studies Idioma: En Revista: Nature Año: 2017 Tipo del documento: Article Pais de publicación: Reino Unido