Naish, Tim et al. (2009): Obliquity-paced Pliocene West Antarctic ice sheet oscillations

Leg/Site/Hole: Related Expeditions:

ODP 119
ODP 178
ODP 188
DSDP 28

Identifier: ID:

2010-038309

Type:

georefid

ID:

10.1038/nature07867

Type:

doi

Creator: Name:

Naish, Tim

Affiliation:

Victoria University of Wellington, Antarctic Research Centre, Wellington, New Zealand

Role:

author

Name:

Powell, R.

Affiliation:

Northern Illinois University, United States

Role:

author

Name:

Levy, R.

Affiliation:

University of Nebraska-Lincoln, United States

Role:

author

Name:

Wilson, G.

Affiliation:

University of Otago, New Zealand

Role:

author

Name:

Scherer, R.

Affiliation:

Universita di Siena, Italy

Role:

author

Name:

Talarico, F.

Affiliation:

Ohio State University, United States

Role:

author

Name:

Krissek, L.

Affiliation:

Alfred Wegener Institute, Federal Republic of Germany

Role:

author

Name:

Niessen, F.

Affiliation:

Istituto Nazionale di Geofisica e Vulcanologia, Italy

Role:

author

Name:

Pompilio, M.

Affiliation:

University of Massachusetts, Amherst, United States

Role:

author

Name:

Wilson, T.

Affiliation:

Harvard University, United States

Role:

author

Name:

Carter, L.

Affiliation:

Pennsylvania State University, United States

Role:

author

Name:

DeConto, R. M.

Affiliation:

New Mexico Institute of Mining & Technology, United States

Role:

author

Name:

Huybers, P.

Affiliation:

Appalachian State University, United States

Role:

author

Name:

McKay, R.

Affiliation:

Johns Hopkins University, United States

Role:

author

Name:

Pollard, D.

Affiliation:

Federal Institute of Geosciences & National Resources, Federal Republic of Germany

Role:

author

Name:

Ross, J.

Affiliation:

Universita Milano-Bicocca, Italy

Role:

author

Name:

Winter, D.

Affiliation:

Colorado School of Mines, United States

Role:

author

Name:

Barrett, P.

Affiliation:

U. S. Geological Survey, United States

Role:

author

Name:

Browne, G.

Affiliation:

University of Wisconsin-Oshkosh, United States

Role:

author

Name:

Cody, R.

Affiliation:

Universita di Parma, Italy

Role:

author

Name:

Cowan, E.

Affiliation:

Iowa State University, United States

Role:

author

Name:

Crampton, J.

Affiliation:

Stanford University, United States

Role:

author

Name:

Dunbar, G.

Affiliation:

University of Alberta, Canada

Role:

author

Name:

Florindo, F.

Affiliation:

Louisiana State University, United States

Role:

author

Name:

Gebhardt, C.

Affiliation:

CNR ISMAR, Italy

Role:

author

Name:

Graham, I.

Affiliation:

Albion College, United States

Role:

author

Name:

Hannah, M.

Affiliation:

Lameont-Doherty Earth Observatory, United States

Role:

author

Name:

Hansaraj, D.

Affiliation:

Role:

author

Name:

Harwood, D.

Affiliation:

Role:

author

Name:

Helling, D.

Affiliation:

Role:

author

Name:

Henrys, S.

Affiliation:

Role:

author

Name:

Hinnov, L.

Affiliation:

Role:

author

Name:

Kuhn, G.

Affiliation:

Role:

author

Name:

Kyle, P.

Affiliation:

Role:

author

Name:

Laeufer, A.

Affiliation:

Role:

author

Name:

Maffioli, P.

Affiliation:

Role:

author

Name:

Magens, D.

Affiliation:

Role:

author

Name:

Mandernack, K.

Affiliation:

Role:

author

Name:

McIntosh, W.

Affiliation:

Role:

author

Name:

Millan, C.

Affiliation:

Role:

author

Name:

Morin, R.

Affiliation:

Role:

author

Name:

Ohneiser, C.

Affiliation:

Role:

author

Name:

Paulsen, T.

Affiliation:

Role:

author

Name:

Persico, D.

Affiliation:

Role:

author

Name:

Raine, I.

Affiliation:

Role:

author

Name:

Reed, J.

Affiliation:

Role:

author

Name:

Riesselman, C.

Affiliation:

Role:

author

Name:

Sagnotti, Leonardo

Affiliation:

Role:

author

Name:

Schmitt, D.

Affiliation:

Role:

author

Name:

Sjunneskog, C.

Affiliation:

Role:

author

Name:

Strong, P.

Affiliation:

Role:

author

Name:

Taviani, M.

Affiliation:

Role:

author

Name:

Vogel, S.

Affiliation:

Role:

author

Name:

Wilch, T.

Affiliation:

Role:

author

Name:

Williams, T.

Affiliation:

Role:

author

Identification: Title:

Obliquity-paced Pliocene West Antarctic ice sheet oscillations

Year:

2009

Source:

Nature (London)

Publisher:

Macmillan Journals, London, United Kingdom

Volume:

458

Issue:

7236

Pages:

322-328

Abstract:

Thirty years after oxygen isotope records from microfossils deposited in ocean sediments confirmed the hypothesis that variations in the Earth's orbital geometry control the ice ages, fundamental questions remain over the response of the Antarctic ice sheets to orbital cycles. Furthermore, an understanding of the behaviour of the marine-based West Antarctic ice sheet (WAIS) during the 'warmer-than-present' early-Pliocene epoch (approx. 5-3 Myr ago) is needed to better constrain the possible range of ice-sheet behavior in the context of future global warming. Here we present a marine glacial record from the upper 600 m of the AND-1B sediment core recovered from beneath the northwest part of the Ross ice shelf by the ANDRILL programme and demonstrate well-dated, approx. 40-kyr cyclic variations in ice-sheet extent linked to cycles in insolation influenced by changes in the Earth's axial tilt (obliquity) during the Pliocene. Our data provide direct evidence for orbitally induced oscillations in the WAIS, which periodically collapsed, resulting in a switch from grounded ice, or ice shelves, to open waters in the Ross embayment when planetary temperatures were up to approx 3 degrees C warmer than today and atmospheric CO (sub 2) concentration was as high as approx. 400 p.p.m.v. (mod. auth. abst.)

Language:

English

Genre:

Serial

Rights:

URL:

Coverage:Geographic coordinates:

	North:-34.0000
West:-180.0000		East: 180.0000
	South:-90.0000

Keywords:

Stratigraphy; ANDRILL; Antarctic ice sheet; Antarctica; carbon dioxide; Cenozoic; climate change; climate forcing; cores; cycles; debris; Deep Sea Drilling Project; glacial geology; ice rafting; icebergs; isotope ratios; isotopes; Leg 119; Leg 178; Leg 188; Leg 28; lithostratigraphy; Neogene; O-18/O-16; obliquity of the ecliptic; Ocean Drilling Program; orbital forcing; oxygen; paleoclimatology; paleoenvironment; Pliocene; Quaternary; sedimentary rocks; sediments; Southern Ocean; stable isotopes; Tertiary; West Antarctic ice sheet;

SEDIS - Publications

Naish, Tim et al. (2009): Obliquity-paced Pliocene West Antarctic ice sheet oscillations