Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary
dc.contributor.author | Naish, Tim | |
dc.contributor.author | Woolfe, K J | |
dc.contributor.author | Barrett, Peter | |
dc.contributor.author | Wilson, G.S | |
dc.contributor.author | Atkins, Cliff | |
dc.contributor.author | Bohaty, S.M | |
dc.contributor.author | Bucker, Christian | |
dc.contributor.author | Claps, Michele | |
dc.contributor.author | Davey, Fred | |
dc.contributor.author | Dunbar, Gavin | |
dc.contributor.author | Dunn, Alistair | |
dc.contributor.author | Fielding, C. | |
dc.contributor.author | Florindo, Fabio | |
dc.contributor.author | Hannah, M.J | |
dc.contributor.author | Harnwood, D | |
dc.contributor.author | Henrys, Stuart | |
dc.contributor.author | Krissek, Lawrence | |
dc.contributor.author | Lavelle, Mark | |
dc.contributor.author | van der Meer , Jaap | |
dc.contributor.author | Mcintosh, William | |
dc.contributor.author | Niessen, Frank | |
dc.contributor.author | Passchier, Sandra | |
dc.contributor.author | Powell, Ross | |
dc.contributor.author | Roberts, Andrew | |
dc.contributor.author | Sagnotti, Leonardo | |
dc.contributor.author | Scherer, R | |
dc.contributor.author | Strong, C.P | |
dc.contributor.author | Talarico, F | |
dc.contributor.author | Verosub, Kenneth | |
dc.contributor.author | Villa, Giuliana | |
dc.contributor.author | Watkins, David | |
dc.contributor.author | Webb, P-N | |
dc.contributor.author | Wonik, Thomas | |
dc.date.accessioned | 2016-02-24T22:42:02Z | |
dc.date.issued | 2001 | |
dc.date.updated | 2016-02-24T11:11:25Z | |
dc.description.abstract | Between 34 and 15 million years (Myr) ago, when planetary temperatures were 3-4°C warmer than at present and atmospheric CO2 concentrations were twice as high as today, the Antarctic ice sheets may have been unstable. Oxygen isotope records from deep-sea sediment cores suggest that during this time fluctuations in global temperatures and high-latitude continental ice volumes were influenced by orbital cycles. But it has hitherto not been possible to calibrate the inferred changes in ice volume with direct evidence for oscillations of the Antarctic ice sheets. Here we present sediment data from shallow marine cores in the western Ross Sea that exhibit well dated cyclic variations, and which link the extent of the East Antarctic ice sheet directly to orbital cycles during the Oligocene/Miocene transition (24.1-23.7 Myr ago). Three rapidly deposited glacimarine sequences are constrained to a period of less than 450 kyr by our age model, suggesting that orbital influences at the frequencies of obliquity (40 kyr) and eccentricity (125 kyr) controlled the oscillations of the ice margin at that time. An erosional hiatus covering 250 kyr provides direct evidence for a major episode of global cooling and ice-sheet expansion about 23.7 Myr ago, which had previously been inferred from oxygen isotope data (Mil event). | |
dc.identifier.issn | 0028-0836 | |
dc.identifier.uri | http://hdl.handle.net/1885/98911 | |
dc.publisher | Macmillan Publishers Ltd | |
dc.source | Nature | |
dc.subject | Keywords: Atmospheric composition; Atmospheric temperature; Carbon dioxide; Climate change; Sediments; Orbital oscillations; Sea ice; carbon dioxide; ice; oxygen; ice sheet; mass balance; Miocene; Oligocene; orbital forcing; article; astronomy; atmosphere; calibrat | |
dc.title | Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary | |
dc.type | Journal article | |
local.bibliographicCitation.issue | 6857 | |
local.bibliographicCitation.lastpage | 723 | |
local.bibliographicCitation.startpage | 719 | |
local.contributor.affiliation | Naish, Tim, Institute of Geological and Nuclear Sciences | |
local.contributor.affiliation | Woolfe, K J, James Cook University | |
local.contributor.affiliation | Barrett, Peter, Victoria University of Wellington | |
local.contributor.affiliation | Wilson, G.S, University of Oxford | |
local.contributor.affiliation | Atkins, Cliff, Victoria University of Wellington | |
local.contributor.affiliation | Bohaty, S.M, University of Nebraska | |
local.contributor.affiliation | Bucker, Christian, Institute of Geosciences | |
local.contributor.affiliation | Claps, Michele, Universita degli Studi di Ancona | |
local.contributor.affiliation | Davey, Fred, Institue of Geological and Nuclear Sciences | |
local.contributor.affiliation | Dunbar, Gavin, Victoria University of Wellington | |
local.contributor.affiliation | Dunn, Alistair, National Institute of Water and Atmospheric Research | |
local.contributor.affiliation | Fielding, C., University of Queensland | |
local.contributor.affiliation | Florindo, Fabio, Instituto Nazionale di Geofisica e Vulcanologia | |
local.contributor.affiliation | Hannah, M.J, Victoria University of Wellington | |
local.contributor.affiliation | Harnwood, D, University of Nebraska | |
local.contributor.affiliation | Henrys, Stuart, NZ Institute of Geological and Nuclear Sciences | |
local.contributor.affiliation | Krissek, Lawrence, Ohio State University | |
local.contributor.affiliation | Lavelle, Mark, University of Cambridge | |
local.contributor.affiliation | van der Meer , Jaap, University of Amsterdam | |
local.contributor.affiliation | Mcintosh, William, New Mexico Institute of Mining and Technology | |
local.contributor.affiliation | Niessen, Frank, Alfred Wegener Institute for Polar and Marine Research | |
local.contributor.affiliation | Passchier, Sandra, Ohio State University | |
local.contributor.affiliation | Powell, Ross, Northern Illinois University | |
local.contributor.affiliation | Roberts, Andrew, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Sagnotti, Leonardo, Instituto Nazionale di Geofisica e Vulcanologia | |
local.contributor.affiliation | Scherer, R, Northern Illinois University | |
local.contributor.affiliation | Strong, C.P, Institute of Geological and Nuclear Sciences | |
local.contributor.affiliation | Talarico, F, Universita di Siena | |
local.contributor.affiliation | Verosub, Kenneth, University of California | |
local.contributor.affiliation | Villa, Giuliana, University di Parma | |
local.contributor.affiliation | Watkins, David, University of Nebraska | |
local.contributor.affiliation | Webb, P-N, Ohio State University | |
local.contributor.affiliation | Wonik, Thomas, Institute of Geosciences | |
local.contributor.affiliation | Dunbar, Gavin, College of Physical and Mathematical Sciences, ANU | |
local.contributor.authoremail | u4817957@anu.edu.au | |
local.contributor.authoruid | Roberts, Andrew, u4817957 | |
local.contributor.authoruid | Dunbar, Gavin, u4066395 | |
local.description.embargo | 2037-12-31 | |
local.description.notes | Imported from ARIES | |
local.identifier.absfor | 040406 - Magnetism and Palaeomagnetism | |
local.identifier.ariespublication | u4539375xPUB80 | |
local.identifier.citationvolume | 413 | |
local.identifier.doi | 10.1038/35099534 | |
local.identifier.scopusID | 2-s2.0-0035909255 | |
local.identifier.uidSubmittedBy | u4539375 | |
local.type.status | Published Version |