Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation

Research output: Contribution to journalArticle

Standard

Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation. / Benn, Douglas I.; Le Hir, Guillaume; Bao, Huiming; Donnadieu, Yannick; Dumas, Christophe; Fleming, Edward J.; Hambrey, Michael J.; McMillan, Emily A.; Petronis, Michael S.; Ramstein, Gilles; Stevenson, Carl T. E.; Wynn, Peter M.; Fairchild, Ian J.

In: Nature Geoscience, Vol. 8, No. 9, 01.09.2015, p. 704-707.

Research output: Contribution to journalArticle

Harvard

Benn, DI, Le Hir, G, Bao, H, Donnadieu, Y, Dumas, C, Fleming, EJ, Hambrey, MJ, McMillan, EA, Petronis, MS, Ramstein, G, Stevenson, CTE, Wynn, PM & Fairchild, IJ 2015, 'Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation', Nature Geoscience, vol. 8, no. 9, pp. 704-707. https://doi.org/10.1038/ngeo2502

APA

Benn, D. I., Le Hir, G., Bao, H., Donnadieu, Y., Dumas, C., Fleming, E. J., Hambrey, M. J., McMillan, E. A., Petronis, M. S., Ramstein, G., Stevenson, C. T. E., Wynn, P. M., & Fairchild, I. J. (2015). Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation. Nature Geoscience, 8(9), 704-707. https://doi.org/10.1038/ngeo2502

Vancouver

Benn DI, Le Hir G, Bao H, Donnadieu Y, Dumas C, Fleming EJ et al. Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation. Nature Geoscience. 2015 Sep 1;8(9):704-707. https://doi.org/10.1038/ngeo2502

Author

Benn, Douglas I. ; Le Hir, Guillaume ; Bao, Huiming ; Donnadieu, Yannick ; Dumas, Christophe ; Fleming, Edward J. ; Hambrey, Michael J. ; McMillan, Emily A. ; Petronis, Michael S. ; Ramstein, Gilles ; Stevenson, Carl T. E. ; Wynn, Peter M. ; Fairchild, Ian J. / Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation. In: Nature Geoscience. 2015 ; Vol. 8, No. 9. pp. 704-707.

Bibtex

@article{9105e6d6b4924d97add87758b9934519,
title = "Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation",
abstract = "Two global glaciations occurred during the Neoproterozoic. Snowball Earth theory posits that these were terminated after millions of years of frigidity when initial warming from rising atmospheric CO2concentrations was amplified by the reduction of ice cover and hence a reduction in planetary albedo. This scenario implies that most of the geological record of ice cover was deposited in a brief period of melt-back. However, deposits in low palaeo-latitudes show evidence of glacial-interglacial cycles. Here we analyse the sedimentology and oxygen and sulphur isotopic signatures of Marinoan Snowball glaciation deposits from Svalbard, in the Norwegian High Arctic. The deposits preserve a record of oscillations in glacier extent and hydrologic conditions under uniformly high atmospheric CO2concentrations. We use simulations from a coupled three-dimensional ice sheet and atmospheric general circulation model to show that such oscillations can be explained by orbital forcing in the late stages of a Snowball glaciation. The simulations suggest that while atmospheric CO2concentrations were rising, but not yet at the threshold required for complete melt-back, the ice sheets would have been sensitive to orbital forcing. We conclude that a similar dynamic can potentially explain the complex successions observed at other localities.",
author = "Benn, {Douglas I.} and {Le Hir}, Guillaume and Huiming Bao and Yannick Donnadieu and Christophe Dumas and Fleming, {Edward J.} and Hambrey, {Michael J.} and McMillan, {Emily A.} and Petronis, {Michael S.} and Gilles Ramstein and Stevenson, {Carl T. E.} and Wynn, {Peter M.} and Fairchild, {Ian J.}",
year = "2015",
month = sep
day = "1",
doi = "10.1038/ngeo2502",
language = "English",
volume = "8",
pages = "704--707",
journal = "Nature Geoscience",
issn = "1752-0894",
publisher = "Nature Publishing Group",
number = "9",

}

RIS

TY - JOUR

T1 - Orbitally forced ice sheet fluctuations during the Marinoan Snowball Earth glaciation

AU - Benn, Douglas I.

AU - Le Hir, Guillaume

AU - Bao, Huiming

AU - Donnadieu, Yannick

AU - Dumas, Christophe

AU - Fleming, Edward J.

AU - Hambrey, Michael J.

AU - McMillan, Emily A.

AU - Petronis, Michael S.

AU - Ramstein, Gilles

AU - Stevenson, Carl T. E.

AU - Wynn, Peter M.

AU - Fairchild, Ian J.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Two global glaciations occurred during the Neoproterozoic. Snowball Earth theory posits that these were terminated after millions of years of frigidity when initial warming from rising atmospheric CO2concentrations was amplified by the reduction of ice cover and hence a reduction in planetary albedo. This scenario implies that most of the geological record of ice cover was deposited in a brief period of melt-back. However, deposits in low palaeo-latitudes show evidence of glacial-interglacial cycles. Here we analyse the sedimentology and oxygen and sulphur isotopic signatures of Marinoan Snowball glaciation deposits from Svalbard, in the Norwegian High Arctic. The deposits preserve a record of oscillations in glacier extent and hydrologic conditions under uniformly high atmospheric CO2concentrations. We use simulations from a coupled three-dimensional ice sheet and atmospheric general circulation model to show that such oscillations can be explained by orbital forcing in the late stages of a Snowball glaciation. The simulations suggest that while atmospheric CO2concentrations were rising, but not yet at the threshold required for complete melt-back, the ice sheets would have been sensitive to orbital forcing. We conclude that a similar dynamic can potentially explain the complex successions observed at other localities.

AB - Two global glaciations occurred during the Neoproterozoic. Snowball Earth theory posits that these were terminated after millions of years of frigidity when initial warming from rising atmospheric CO2concentrations was amplified by the reduction of ice cover and hence a reduction in planetary albedo. This scenario implies that most of the geological record of ice cover was deposited in a brief period of melt-back. However, deposits in low palaeo-latitudes show evidence of glacial-interglacial cycles. Here we analyse the sedimentology and oxygen and sulphur isotopic signatures of Marinoan Snowball glaciation deposits from Svalbard, in the Norwegian High Arctic. The deposits preserve a record of oscillations in glacier extent and hydrologic conditions under uniformly high atmospheric CO2concentrations. We use simulations from a coupled three-dimensional ice sheet and atmospheric general circulation model to show that such oscillations can be explained by orbital forcing in the late stages of a Snowball glaciation. The simulations suggest that while atmospheric CO2concentrations were rising, but not yet at the threshold required for complete melt-back, the ice sheets would have been sensitive to orbital forcing. We conclude that a similar dynamic can potentially explain the complex successions observed at other localities.

UR - http://www.scopus.com/inward/record.url?scp=84940515515&partnerID=8YFLogxK

U2 - 10.1038/ngeo2502

DO - 10.1038/ngeo2502

M3 - Article

VL - 8

SP - 704

EP - 707

JO - Nature Geoscience

JF - Nature Geoscience

SN - 1752-0894

IS - 9

ER -