Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary

Tim R. Naish, Ken J. Woolfe, Peter J. Barrett, Gary S. Wilson, Cliff Atkins, Steven M. Bohaty, Christian J. Bücker, Michele Claps, Fred J. Davey, Gavin B. Dunbar, Alistair G. Dunn, Chris R. Fielding, Fabio Florindo, Michael J. Hannah, David M. Harwood, Stuart A. Henrys, Lawrence A. Krissek, Mark Lavelle, Jaap Van Der Meer, William C. Mcintosh & 13 others Frank Niessen, Sandra Passchier, Ross D. Powell, Andrew P. Roberts, Leonardo Sagnotti, Reed P. Scherer, C. Percy Strong, Franco Talarico, Kenneth L. Verosub, Giuliana Villa, David K. Watkins, Peter N. Webb, Thomas Wonik

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172 Citations (Scopus)

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).

Original languageEnglish
Pages (from-to)719-723
Number of pages5
JournalNature
Volume413
Issue number6857
DOIs
StatePublished - 18 Oct 2001

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Ice Cover
Ice
Oxygen Isotopes
Oceans and Seas
Temperature

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Naish, T. R., Woolfe, K. J., Barrett, P. J., Wilson, G. S., Atkins, C., Bohaty, S. M., ... Wonik, T. (2001). Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary. Nature, 413(6857), 719-723. https://doi.org/10.1038/35099534
Naish, Tim R. ; Woolfe, Ken J. ; Barrett, Peter J. ; Wilson, Gary S. ; Atkins, Cliff ; Bohaty, Steven M. ; Bücker, Christian J. ; Claps, Michele ; Davey, Fred J. ; Dunbar, Gavin B. ; Dunn, Alistair G. ; Fielding, Chris R. ; Florindo, Fabio ; Hannah, Michael J. ; Harwood, David M. ; Henrys, Stuart A. ; Krissek, Lawrence A. ; Lavelle, Mark ; Van Der Meer, Jaap ; Mcintosh, William C. ; Niessen, Frank ; Passchier, Sandra ; Powell, Ross D. ; Roberts, Andrew P. ; Sagnotti, Leonardo ; Scherer, Reed P. ; Strong, C. Percy ; Talarico, Franco ; Verosub, Kenneth L. ; Villa, Giuliana ; Watkins, David K. ; Webb, Peter N. ; Wonik, Thomas. / Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary. In: Nature. 2001 ; Vol. 413, No. 6857. pp. 719-723.
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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).",
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Naish, TR, Woolfe, KJ, Barrett, PJ, Wilson, GS, Atkins, C, Bohaty, SM, Bücker, CJ, Claps, M, Davey, FJ, Dunbar, GB, Dunn, AG, Fielding, CR, Florindo, F, Hannah, MJ, Harwood, DM, Henrys, SA, Krissek, LA, Lavelle, M, Van Der Meer, J, Mcintosh, WC, Niessen, F, Passchier, S, Powell, RD, Roberts, AP, Sagnotti, L, Scherer, RP, Strong, CP, Talarico, F, Verosub, KL, Villa, G, Watkins, DK, Webb, PN & Wonik, T 2001, 'Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary', Nature, vol. 413, no. 6857, pp. 719-723. https://doi.org/10.1038/35099534

Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary. / Naish, Tim R.; Woolfe, Ken J.; Barrett, Peter J.; Wilson, Gary S.; Atkins, Cliff; Bohaty, Steven M.; Bücker, Christian J.; Claps, Michele; Davey, Fred J.; Dunbar, Gavin B.; Dunn, Alistair G.; Fielding, Chris R.; Florindo, Fabio; Hannah, Michael J.; Harwood, David M.; Henrys, Stuart A.; Krissek, Lawrence A.; Lavelle, Mark; Van Der Meer, Jaap; Mcintosh, William C.; Niessen, Frank; Passchier, Sandra; Powell, Ross D.; Roberts, Andrew P.; Sagnotti, Leonardo; Scherer, Reed P.; Strong, C. Percy; Talarico, Franco; Verosub, Kenneth L.; Villa, Giuliana; Watkins, David K.; Webb, Peter N.; Wonik, Thomas.

In: Nature, Vol. 413, No. 6857, 18.10.2001, p. 719-723.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary

AU - Naish, Tim R.

AU - Woolfe, Ken J.

AU - Barrett, Peter J.

AU - Wilson, Gary S.

AU - Atkins, Cliff

AU - Bohaty, Steven M.

AU - Bücker, Christian J.

AU - Claps, Michele

AU - Davey, Fred J.

AU - Dunbar, Gavin B.

AU - Dunn, Alistair G.

AU - Fielding, Chris R.

AU - Florindo, Fabio

AU - Hannah, Michael J.

AU - Harwood, David M.

AU - Henrys, Stuart A.

AU - Krissek, Lawrence A.

AU - Lavelle, Mark

AU - Van Der Meer, Jaap

AU - Mcintosh, William C.

AU - Niessen, Frank

AU - Passchier, Sandra

AU - Powell, Ross D.

AU - Roberts, Andrew P.

AU - Sagnotti, Leonardo

AU - Scherer, Reed P.

AU - Strong, C. Percy

AU - Talarico, Franco

AU - Verosub, Kenneth L.

AU - Villa, Giuliana

AU - Watkins, David K.

AU - Webb, Peter N.

AU - Wonik, Thomas

PY - 2001/10/18

Y1 - 2001/10/18

N2 - 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).

AB - 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).

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Naish TR, Woolfe KJ, Barrett PJ, Wilson GS, Atkins C, Bohaty SM et al. Orbitally induced oscillations in the East Antarctic ice sheet at the Oligocene/Miocene boundary. Nature. 2001 Oct 18;413(6857):719-723. https://doi.org/10.1038/35099534