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Observing the subglacial hydrology network and its dynamics with a dense seismic array 期刊论文
Proceedings of the National Academy of Science, 2021
作者:  Ugo Nanni;  Florent Gimbert;  Philippe Roux;  Albanne Lecointre
收藏  |  浏览/下载:6/0  |  提交时间:2021/07/27
Enhanced trace element mobilization by Earth’s ice sheets 期刊论文
Proceedings of the National Academy of Science, 2020
作者:  Jon R. Hawkings;  Mark L. Skidmore;  Jemma L. Wadham;  John C. Priscu;  Peter L. Morton;  Jade E. Hatton;  Christopher B. Gardner;  Tyler J. Kohler;  Marek Stibal;  Elizabeth A. Bagshaw;  August Steigmeyer;  Joel Barker;  John E. Dore;  W. Berry Lyons;  Martyn Tranter;  Robert G. M. Spencer;  the SALSA Science Team
收藏  |  浏览/下载:10/0  |  提交时间:2020/11/30
A new sea-level record for the Neogene/Quaternary boundary reveals transition to a more stable East Antarctic Ice Sheet 期刊论文
Proceedings of the National Academy of Science, 2020
作者:  Kim A. Jakob;  Paul A. Wilson;  Jörg Pross;  Thomas H. G. Ezard;  Jens Fiebig;  Janne Repschläger;  Oliver Friedrich
收藏  |  浏览/下载:6/0  |  提交时间:2020/11/30
The enigma of Oligocene climate and global surface temperature evolution 期刊论文
Proceedings of the National Academy of Science, 2020
作者:  Charlotte L. O’Brien;  Matthew Huber;  Ellen Thomas;  Mark Pagani;  James R. Super;  Leanne E. Elder;  Pincelli M. Hull
收藏  |  浏览/下载:8/0  |  提交时间:2020/10/12
Emergence of the Southeast Asian islands as a driver for Neogene cooling 期刊论文
Proceedings of the National Academy of Science, 2020
作者:  Yuem Park;  Pierre Maffre;  Yves Goddéris;  Francis A. Macdonald;  Eliel S. C. Anttila;  Nicholas L. Swanson-Hysell
收藏  |  浏览/下载:7/0  |  提交时间:2020/09/30
Ice retreat in Wilkes Basin of East Antarctica during a warm interglacial 期刊论文
NATURE, 2020, 583 (7817) : 554-+
作者:  T. Blackburn;  G. H. Edwards;  S. Tulaczyk;  M. Scudder;  G. Piccione;  B. Hallet;  N. McLean;  J. C. Zachos;  B. Cheney;  J. T. Babbe
收藏  |  浏览/下载:19/0  |  提交时间:2020/08/09

Uranium isotopes in subglacial precipitates from the Wilkes Basin of the East Antarctic Ice Sheet reveal ice retreat during a warm Pleistocene interglacial period about 400,000 years ago.


Efforts to improve sea level forecasting on a warming planet have focused on determining the temperature, sea level and extent of polar ice sheets during Earth'  s past interglacial warm periods(1-3). About 400,000 years ago, during the interglacial period known as Marine Isotopic Stage 11 (MIS11), the global temperature was 1 to 2 degrees Celsius greater(2)and sea level was 6 to 13 metres higher(1,3). Sea level estimates in excess of about 10 metres, however, have been discounted because these require a contribution from the East Antarctic Ice Sheet(3), which has been argued to have remained stable for millions of years before and includes MIS11(4,5). Here we show how the evolution of(234)U enrichment within the subglacial waters of East Antarctica recorded the ice sheet'  s response to MIS11 warming. Within the Wilkes Basin, subglacial chemical precipitates of opal and calcite record accumulation of(234)U (the product of rock-water contact within an isolated subglacial reservoir) up to 20 times higher than that found in marine waters. The timescales of(234)U enrichment place the inception of this reservoir at MIS11. Informed by the(234)U cycling observed in the Laurentide Ice Sheet, where(234)U accumulated during periods of ice stability(6)and was flushed to global oceans in response to deglaciation(7), we interpret our East Antarctic dataset to represent ice loss within the Wilkes Basin at MIS11. The(234)U accumulation within the Wilkes Basin is also observed in the McMurdo Dry Valleys brines(8-10), indicating(11)that the brine originated beneath the adjacent East Antarctic Ice Sheet. The marine origin of brine salts(10)and bacteria(12)implies that MIS11 ice loss was coupled with marine flooding. Collectively, these data indicate that during one of the warmest Pleistocene interglacials, the ice sheet margin at the Wilkes Basin retreated to near the precipitate location, about 700 kilometres inland from the current position of the ice margin, which-assuming current ice volumes-would have contributed about 3 to 4 metres(13)to global sea levels.


  
Elevated dust depositions in West Asia linked to ocean–atmosphere shifts during North Atlantic cold events 期刊论文
Proceedings of the National Academy of Science, 2020
作者:  Reza Safaierad;  Mahyar Mohtadi;  Bernd Zolitschka;  Yusuke Yokoyama;  Christoph Vogt;  Enno Schefuß
收藏  |  浏览/下载:10/0  |  提交时间:2020/08/09
Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago 期刊论文
NATURE GEOSCIENCE, 2020, 13 (5)
作者:  Brendryen, Jo;  Haflidason, Haflidi;  Yokoyama, Yusuke;  Haaga, Kristian Agasoster;  Hannisdal, Bjarte
收藏  |  浏览/下载:9/0  |  提交时间:2020/05/13
Ancient ice-sheet collapse 期刊论文
NATURE GEOSCIENCE, 2020, 13 (5) : 328-329
作者:  Ortiz, Joseph D.
收藏  |  浏览/下载:1/0  |  提交时间:2020/05/13
Timing and magnitude of Southern Ocean sea ice/carbon cycle feedbacks 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (9) : 4498-4504
作者:  Stein, Karl;  Timmermann, Axel;  Kwon, Eun Young;  Friedrich, Tobias
收藏  |  浏览/下载:5/0  |  提交时间:2020/05/13
Southern Ocean  sea ice  glacial cycles  carbon cycle