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Showing 1–10 of 10 results
Advanced filters: Author: Sandra Passchier Clear advanced filters

  • The East Antarctic ice sheet, the largest in the world, lies seemingly frozen in time. Discovery of a rugged landscape buried beneath the thick ice provides evidence of a more dynamic past. See Letter p.72

    • Sandra Passchier
    News & Views
    Nature
    Volume: 474, P: 46-47

  • The growth of ice on Antarctica about 34 million years ago affected sea level. A combination of modelling and marine sediment analyses shows that sea level near the developing ice sheet first fell and then rose as a result of crustal deformation imposed by the ice growth.

    • Paolo Stocchi
    • Carlota Escutia
    • Masako Yamane
    Research
    Nature Geoscience
    Volume: 6, P: 380-384

  • The presence of ice-rafted debris (IRD) in middle Eocene ocean sediments has previously been demonstrated, but it has been unclear whether the source of IRD was land-based glacial ice or sea ice, a distinction with important climate implications. The analysis of a sediment core from the ACEX project now reveals evidence that sea ice was the dominant source for IRD from 47.5 to 45.5 million years ago.

    • Catherine E. Stickley
    • Kristen St John
    • Lance E. Kearns
    Research
    Nature
    Volume: 460, P: 376-379

  • The East Antarctic ice sheet is considered to be largely insensitive to temperature changes in the Southern Ocean. Marine sediment records indicate the East Antarctic ice sheet repeatedly retreated by several hundred kilometres during intervals of Pliocene warmth.

    • Carys P. Cook
    • Tina van de Flierdt
    • Masako Yamane
    Research
    Nature Geoscience
    Volume: 6, P: 765-769

  • Ocean heat is important in forcing ice sheet retreat, yet past ocean temperature data from proximal ice sheet locations are sparse. Here, the authors present temperature reconstructions from the Wilkes Land subglacial basin during the mid-Miocene, and show that warm waters sustained ice sheet retreat 17–14.8 Ma.

    • Francesca Sangiorgi
    • Peter K. Bijl
    • Henk Brinkhuis
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-11

  • Understudied in the Antarctic system are the subsurface interfaces between ice-sheet, ocean and geological substrate. Here, the authors review our understanding of these components and propose new avenues of holistic dynamic modeling to achieve a unified understanding of past, present and future polar climate.

    • Florence Colleoni
    • Laura De Santis
    • Martin J. Siegert
    ReviewsOpen Access
    Nature Communications
    Volume: 9, P: 1-14