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Supercooled liquid water clouds observed over Dome C, Antarctica: temperature sensitivity and surface radiation impact 期刊论文
Atmospheric Chemistry and Physics, 2022
作者:  Philippe Ricaud, Massimo Del Guasta, Angelo Lupi, Romain Roehrig, Eric Bazile, Pierre Durand, Jean-Luc Attié, Alessia Nicosia, and Paolo Grigioni
收藏  |  浏览/下载:12/0  |  提交时间:2022/07/08
The atmospheric iron variations during 1950–2016 recorded in snow at Dome Argus, East Antarctica 期刊论文
Atmospheric Research, 2020
作者:  Ke Liu, Shugui Hou, Shuangye Wu, Hongxi Pang, ... Jiajia Wang
收藏  |  浏览/下载:7/0  |  提交时间:2020/09/22
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:21/0  |  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.


  
The Mesoproterozoic Baoban Complex, South China: A missing fragment of western Laurentian lithosphere 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (7-8) : 1404-1418
作者:  Xu, Ya-Jun;  Cawood, Peter A.;  Zhang, Hang-Chuan;  Zi, Jian-Wei;  Zhou, Jin-Bo;  Li, Li-Xing;  Du, Yuan-Sheng
收藏  |  浏览/下载:15/0  |  提交时间:2020/08/18
Deposition, recycling, and archival of nitrate stable isotopes between the air-snow interface: comparison between Dronning Maud Land and Dome C, Antarctica 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (9) : 5861-5885
作者:  Winton, V. Holly L.;  Ming, Alison;  Caillon, Nicolas;  Hauge, Lisa;  Jones, Anna;  Savarino, Joel;  Yang, Xin;  Frey, Markus M.
收藏  |  浏览/下载:11/0  |  提交时间:2020/05/20
Gravity Wave Excitation during the Coastal Transition of an Extreme Katabatic Flow in Antarctica 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1295-1312
作者:  Vignon, Etienne;  Picard, Ghislain;  Duran-Alarcon, Claudio;  Alexander, Simon P.;  Gallee, Hubert;  Berne, Alexis
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
Antarctica  Gravity waves  Katabatic winds  
Seismic stratigraphy of the Sabrina Coast shelf, East Antarctica: Early history of dynamic meltwater-rich glaciations 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (3-4) : 545-561
作者:  Montelli, Aleksandr;  Gulick, Sean P. S.;  Fernandez, Rodrigo;  Frederick, Bruce C.;  Shevenell, Amelia E.;  Leventer, Amy;  Blankenship, Donald D.
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet 期刊论文
NATURE GEOSCIENCE, 2020, 13 (2) : 132-+
作者:  Morlighem, Mathieu;  Rignot, Eric;  Binder, Tobias;  Blankenship, Donald;  Drews, Reinhard;  Eagles, Graeme;  Eisen, Olaf;  Ferraccioli, Fausto;  Forsberg, Rene;  Fretwell, Peter;  Goel, Vikram;  Greenbaum, Jamin S.;  Gudmundsson, Hilmar;  Guo, Jingxue;  Helm, Veit;  Hofstede, Coen;  Howat, Ian;  Humbert, Angelika;  Jokat, Wilfried;  Karlsson, Nanna B.;  Lee, Won Sang;  Matsuoka, Kenichi;  Millan, Romain;  Mouginot, Jeremie;  Paden, John;  Pattyn, Frank;  Roberts, Jason;  Rosier, Sebastian;  Ruppel, Antonia;  Seroussi, Helene;  Smith, Emma C.;  Steinhage, Daniel;  Sun, Bo;  van den Broeke, Michiel R.;  van Ommen, Tas D.;  van Wessem, Melchior;  Young, Duncan A.
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
The local Last Glacial Maximum in McMurdo Sound, Antarctica: Implications for ice-sheet behavior in the Ross Sea Embayment 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (1-2) : 31-47
作者:  Christ, Andrew J.;  Bierman, Paul R.
收藏  |  浏览/下载:6/0  |  提交时间:2020/07/02
Ross Ice Shelf response to climate driven by the tectonic imprint on seafloor bathymetry 期刊论文
NATURE GEOSCIENCE, 2019, 12 (6) : 441-+
作者:  Tinto, K. J.;  39;Brien, G.
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/26