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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.


  
Increased drought severity tracks warming in the United States' largest river basin 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (21) : 11328-11336
作者:  Martin, Justin T.;  Pederson, Gregory T.;  Woodhouse, Connie A.;  Cook, Edward R.;  McCabe, Gregory J.;  Anchukaitis, Kevin J.;  Wise, Erika K.;  Erger, Patrick J.;  Dolan, Larry;  McGuire, Marketa;  Gangopadhyay, Subhrendu;  Chase, Katherine J.;  Littell, Jeremy S.;  Gray, Stephen T.;  George, Scott St.;  Friedman, Jonathan M.;  Sauchyn, David J.;  St-Jacques, Jeannine-Marie;  King, John
收藏  |  浏览/下载:14/0  |  提交时间:2020/05/13
drought severity  streamflow  temperature  precipitation  water resources  
On the use of averaged indicators to assess lakes' thermal response to changes in climatic conditions 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (3)
作者:  Toffolon, Marco;  Piccolroaz, Sebastiano;  Calamita, Elisa
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/02
Laurentian great lakes  climate change  lake warming  index  lake surface water temperature  stratification  thermal dynamics  
Linear correction method for improved atmospheric vertical profile retrieval based on ground-based microwave radiometer 期刊论文
ATMOSPHERIC RESEARCH, 2020, 232
作者:  Zhao, Yuxin;  Yan, Hualong;  Wu, Peng;  Zhou, Di
收藏  |  浏览/下载:11/0  |  提交时间:2020/07/02
Atmospheric profile retrieval  Brightness temperature correction  Linear regression  Vertical temperature  Water vapor profiles  
Compact Operational Tropospheric Water Vapor and Temperature Raman Lidar with Turbulence Resolution 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Lange, D.;  Behrendt, A.;  Wulfmeyer, V.
收藏  |  浏览/下载:8/0  |  提交时间:2020/02/17
Water-Vapor and Temperature Raman lidar  Atmospheric Boundary Layer  Thermodynamic Profiler  Turbulence  Temperature inversion layers  
A Wet-Bulb Temperature-Based Rain-Snow Partitioning Scheme Improves Snowpack Prediction Over the Drier Western United States 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (23) : 13825-13835
作者:  Wang, Yuan-Heng;  Broxton, Patrick;  Fang, Yuanhao;  Behrangi, Ali;  Barlage, Michael;  Zeng, Xubin;  Niu, Guo-Yue
收藏  |  浏览/下载:14/0  |  提交时间:2020/02/17
precipitation partitioning  wet-bulb temperature  Noah-MP land surface model  snow water equivalent  
Scale Analysis of Moist Thermodynamics in a Simple Model and the Relationship between Moisture Modes and Gravity Waves 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2019, 76 (12) : 3863-3881
作者:  Adames, Angel F.;  Kim, Daehyun;  Clark, Spencer K.;  Ming, Yi;  Inoue, Kuniaki
收藏  |  浏览/下载:10/0  |  提交时间:2020/02/17
Convective adjustment  Gravity waves  Waves  atmospheric  Temperature  Water vapor  
Advancing global change biology through experimental manipulations: Where have we been and where might we go? 期刊论文
GLOBAL CHANGE BIOLOGY, 2020, 26 (1) : 287-299
作者:  Hanson, Paul J.;  Walker, Anthony P.
收藏  |  浏览/下载:9/0  |  提交时间:2020/02/17
elevated CO2  environment  experiments  models as hypotheses  nutrients  ozone  temperature  warming  water availability  
Terrestrial water storage and Pacific SST affect the monthly water balance of Itacaiunas River Basin (Eastern Amazonia) 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Cavalcante, Rosane B. L.;  Pontes, Paulo R. M.;  Tedeschi, Renata G.;  Costa, Claudia P. W.;  Ferreira, Douglas B. S.;  Souza-Filho, Pedro W. M.;  de Souza, Everaldo B.
收藏  |  浏览/下载:9/0  |  提交时间:2020/02/17
Amazonia  El Nino-Southern Oscillation  GRACE  Itacaiunas River Basin  North Atlantic Sea surface temperature  terrestrial water storage  water balance  
Electrification of Experimental Volcanic Jets with Varying Water Content and Temperature 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Stern, S.;  Cimarelli, C.;  Gaudin, D.;  Scheu, B.;  Dingwell, D. B.
收藏  |  浏览/下载:4/0  |  提交时间:2019/11/27
volcanic lightning  atmospheric electricity  Faraday cage  volcanic jets  temperature  water content