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“热量炸弹”对北极海冰具有摧毁作用 快报文章
资源环境快报,2021年第9期
作者:  薛明媚,王金平
Microsoft Word(14Kb)  |  收藏  |  浏览/下载:445/0  |  提交时间:2021/05/18
Plumes of Warm Water  Heat Bombs  Arctic Sea Ice  
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
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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.


  
Understanding the Interfacial Behavior of Typical Perfluorocarboxylic Acids at Surfactant-Coated Aqueous Interfaces 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Cheng, Shumin;  Du, Lin;  George, Christian
收藏  |  浏览/下载:28/0  |  提交时间:2020/08/18
Langmuir film  Lipid  Mixed monolayer  Air-water interface  sea spray aerosol  Perfluorocarboxylic acids  
Adaptation time to magnified flood hazards underestimated when derived from tide gauge records 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (7)
作者:  Lambert, Erwin;  Rohmer, Jeremy;  Le Cozannet, Goneri;  van de Wal, Roderik S. W.
收藏  |  浏览/下载:26/0  |  提交时间:2020/08/18
Sea-level rise  extreme water level  waves  coastal adaptation  joint probability  
Estimation of global coastal sea level extremes using neural networks 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (7)
作者:  Bruneau, Nicolas;  Polton, Jeff;  Williams, Joanne;  Holt, Jason
收藏  |  浏览/下载:19/0  |  提交时间:2020/08/18
sea water anomaly  extremes  storm surges  GESLA database  machine learning  
Impact of Atlantic water inflow on winter cyclone activity in the Barents Sea: insights from coupled regional climate model simulations 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (2)
作者:  Akperov, Mirseid;  Semenov, Vladimir A.;  Mokhov, Igor I.;  Dorn, Wolfgang;  Rinke, Annette
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
arctic climate change  regional climate modeling  cyclone activity  Barents Sea  atlantic water inflow  
Using Hydrological-Biogeochemical Linkages to Elucidate Carbon Dynamics in Coastal Marshes Subject to Relative Sea Level Rise 期刊论文
WATER RESOURCES RESEARCH, 2020, 56 (2)
作者:  Guimond, Julia A.;  Yu, Xuan;  Seyfferth, Angelia L.;  Michael, Holly A.
收藏  |  浏览/下载:20/0  |  提交时间:2020/07/02
coastal wetlands  sea level rise  carbon budgets  groundwater-surface water interaction  groundwater modeling  estuaries  
Water level changes, subsidence, and sea level rise in the Ganges-Brahmaputra-Meghna delta 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (4) : 1867-1876
作者:  Becker, Melanie;  Papa, Fabrice;  Karpytchev, Mikhail;  Delebecque, Caroline;  Krien, Yann;  Khan, Jamal Uddin;  Ballu, Valerie;  Durand, Fabien;  Le Cozannet, Goneri;  Islam, A. K. M. Saiful;  Calmant, Stephane;  Shum, C. K.
收藏  |  浏览/下载:22/0  |  提交时间:2020/05/13
delta  water level  sea level  subsidence  Bangladesh  
Ocean Heat Transport Into the Barents Sea: Distinct Controls on the Upward Trend and Interannual Variability 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (22) : 13180-13190
作者:  Wang, Qiang;  Wang, Xuezhu;  Wekerle, Claudia;  Danilov, Sergey;  Jung, Thomas;  Koldunov, Nikolay;  Lind, Sigrid;  Sein, Dmitry;  Shu, Qi;  Sidorenko, Dmitry
收藏  |  浏览/下载:19/0  |  提交时间:2020/02/17
Barents Sea  Atlantic Water  heat transport  subpolar North Atlantic  wind forcing  Nordic Seas  
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:19/0  |  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