Relative sea-level rise around East Antarctica during Oligocene glaciation

Research output: Contribution to journalArticlepeer-review

Authors

  • Paolo Stocchi
  • Carlota Escutia
  • Alexander J P Houben
  • Bert L A Vermeersen
  • Peter K. Bijl
  • Henk Brinkhuis
  • Robert M. DeConto
  • Simone Galeotti
  • Sandra Passchier
  • David Pollard
  • Adam Klaus
  • Annick Fehr
  • Trevor Williams
  • Steven M. Bohaty
  • Stephanie A. Carr
  • Robert B. Dunbar
  • Jose Abel Flores
  • Jhon J. Gonzàlez
  • Travis G. Hayden
  • Masao Iwai
  • Francisco J. Jimenez-Espejo
  • Kota Katsuki
  • Gee Soo Kong
  • Robert M. McKay
  • Mutsumi Nakai
  • Matthew P. Olney
  • Stephen F. Pekar
  • Jörg Pross
  • Christina Riesselman
  • Ursula Röhl
  • Toyosaburo Sakai
  • Prakash Kumar Shrivastava
  • Catherine E. Stickley
  • Saiko Sugisaki
  • Lisa Tauxe
  • Shouting Tuo
  • Tina Van De Flierdt
  • Kevin Welsh
  • Masako Yamane

Colleges, School and Institutes

External organisations

  • Utrecht University
  • CSIC-UGR - Instituto Andaluz de Ciencias de la Tierra (IACT)
  • Netherlands Organisation for Applied Scientific Research, TNO
  • Kavli Institute of Nanoscience, Delft University of Technology
  • University of Massachusetts - Amherst, Amherst, Massachusetts 01003, USA
  • Università di Urbino
  • Montclair State University
  • Pennsylvania State University
  • The University of Texas at Brownsville and Texas Southmost College, Brownsville, Texas 78520, USA
  • RWTH Aachen University
  • Lamont-Doherty Earth Observatory
  • School of Geography, Earth and Environmental Sciences, University of Birmingham
  • University of Southampton
  • Colorado School of Mines
  • Stanford University
  • Universidad de Salamanca
  • Western Michigan University
  • Kochi University
  • Nagoya University
  • Korea Institute of Geoscience and Mineral Resources
  • University of Wellington
  • Daito Bunka University
  • University of South Florida Tampa
  • Goethe-Universität Frankfurt Am Main
  • U.S. Geological Survey
  • University of Bremen
  • Utsunomiya University
  • Geological Survey of
  • Universitet i Tromsø
  • Tokyo Metropolitan University
  • University of California, San Diego
  • Tongji University
  • Imperial College London
  • The University of Queensland

Abstract

During the middle and late Eocene (∼48-34 Myr ago), the Earth's climate cooled1,2 and an ice sheet built up on Antarctica. The stepwise expansion of ice on Antarctica3,4induced crustal deformation and gravitational perturbations around the continent. Close to the ice sheet, sea level rose5,6despite an overall reduction in the mass of the ocean caused by the transfer of water to the ice sheet. Here we identify the crustal response to ice-sheet growth by forcing a glacial-hydro isostatic adjustment model7 with an Antarctic ice-sheet model. We find that the shelf areas around East Antarctica first shoaled as upper mantle material upwelled and a peripheral forebulge developed. The inner shelf subsequently subsided as lithosphere flexure extended outwards from the ice-sheet margins. Consequently the coasts experienced a progressive relative sea-level rise. Our analysis of sediment cores from the vicinity of the Antarctic ice sheet are in agreement with the spatial patterns of relative sea-level change indicated by our simulations. Our results are consistent with the suggestion8 that near-field processes such as local sea-level change influence the equilibrium state obtained by an icesheet grounding line.

Details

Original languageEnglish
Pages (from-to)380-384
Number of pages5
JournalNature Geoscience
Volume6
Issue number5
Publication statusPublished - May 2013

ASJC Scopus subject areas