GSTDTAP

浏览/检索结果: 共1709条,第1-10条 帮助

限定条件        
已选(0)清除 条数/页:   排序方式:
In Memoriam Professor Lord Robert May of Oxford (1936-2020) 期刊论文
TRENDS IN ECOLOGY & EVOLUTION, 2020, 35 (8)
作者:  Gupta, Sunetra
收藏  |  浏览/下载:7/0  |  提交时间:2020/08/18
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:20/0  |  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.


  
Future changes in the trading of virtual water 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Graham, Neal T.;  Hejazi, Mohamad, I;  Kim, Son H.;  Davies, Evan G. R.;  Edmonds, James A.;  Miralles-Wilhelm, Fernando
收藏  |  浏览/下载:15/0  |  提交时间:2020/08/09
Anthropogenic stressors impact fish sensory development and survival via thyroid disruption 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Besson, Marc;  Feeney, William E.;  Moniz, Isadora;  Francois, Loic;  Brooker, Rohan M.;  Holzer, Guillaume;  Metian, Marc;  Roux, Natacha;  Laudet, Vincent;  Lecchini, David
收藏  |  浏览/下载:17/0  |  提交时间:2020/07/21
Breaking Earth's shell into a global plate network 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Tang, C. A.;  Webb, A. A. G.;  Moore, W. B.;  Wang, Y. Y.;  Ma, T. H.;  Chen, T. T.
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/21
Impacts of international trade on global sustainable development 期刊论文
NATURE SUSTAINABILITY, 2020
作者:  Xu, Zhenci;  Li, Yingjie;  Chau, Sophia N.;  Dietz, Thomas;  Li, Canbing;  Wan, Luwen;  Zhang, Jindong;  Zhang, Liwei;  Li, Yunkai;  Chung, Min Gon;  Liu, Jianguo
收藏  |  浏览/下载:12/0  |  提交时间:2020/07/21
The relative importance of plasticity versus genetic differentiation in explaining between population differences; a meta-analysis 期刊论文
ECOLOGY LETTERS, 2020
作者:  Stamp, Megan A.;  Hadfield, Jarrod D.
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/14
Counter-gradient variation  Gene-flow  local adaptation  phenotypic plasticity  
Large-scale mass wasting in the western Indian Ocean constrains onset of East African rifting 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Maselli, Vittorio;  Iacopini, David;  Ebinger, Cynthia J.;  Tewari, Sugandha;  de Haas, Henk;  Wade, Bridget S.;  Pearson, Paul N.;  Francis, Malcom;  van Vliet, Arjan;  Richards, Bill;  Kroon, Dick
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/14
Meta-population structure and the evolutionary transition to multicellularity 期刊论文
ECOLOGY LETTERS, 2020
作者:  Rose, Caroline J.;  Hammerschmidt, Katrin;  Pichugin, Yuriy;  Rainey, Paul B.
收藏  |  浏览/下载:5/0  |  提交时间:2020/07/14
Dispersal  fitness decoupling  germ line  group selection  soma  
Limited and localized magmatism in the Central Atlantic Magmatic Province 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Marzen, R. E.;  Shillington, D. J.;  Lizarralde, D.;  Knapp, J. H.;  Heffner, D. M.;  Davis, J. K.;  Harder, S. H.
收藏  |  浏览/下载:9/0  |  提交时间:2020/07/09