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Persistence of soil organic carbon caused by functional complexity 期刊论文
NATURE GEOSCIENCE, 2020
作者:  Lehmann, Johannes;  Hansel, Colleen M.;  Kaiser, Christina;  Kleber, Markus;  Maher, Kate;  Manzoni, Stefano;  Nunan, Naoise;  Reichstein, Markus;  Schimel, Joshua P.;  Torn, Margaret S.;  Wieder, William R.;  Koegel-Knabner, Ingrid
收藏  |  浏览/下载:12/0  |  提交时间:2020/08/09
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.


  
Study of the dependence of long-term stratospheric ozone trends on local solar time 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (14) : 8453-8471
作者:  Barras, Eliane Maillard;  Haefele, Alexander;  Nguyen, Liliane;  Tummon, Fiona;  Ball, William T.;  Rozanov, Eugene, V;  Rufenacht, Rolf;  Hocke, Klemens;  Bernet, Leonie;  Kampfer, Niklaus;  Nedoluha, Gerald;  Boyd, Ian
收藏  |  浏览/下载:33/0  |  提交时间:2020/08/09
Late Cenozoic climate change paces landscape adjustments to Yukon River capture 期刊论文
NATURE GEOSCIENCE, 2020
作者:  Bender, Adrian M.;  Lease, Richard O.;  Corbett, Lee B.;  Bierman, Paul R.;  Caffee, Marc W.;  Rittenour, Tammy M.
收藏  |  浏览/下载:13/0  |  提交时间:2020/08/09
Response of surface shortwave cloud radiative effect to greenhouse gases and aerosols and its impact on summer maximum temperature 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (13) : 8251-8266
作者:  Tang, Tao;  Shindell, Drew;  Zhang, Yuqiang;  Voulgarakis, Apostolos;  Lamarque, Jean-Francois;  Myhre, Gunnar;  Stjern, Camilla W.;  Faluvegi, Gregory;  Samset, Bjorn H.
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/21
Global distribution of sediment-hosted metals controlled by craton edge stability 期刊论文
NATURE GEOSCIENCE, 2020, 13 (7) : 504-+
作者:  Hoggard, Mark J.;  Czarnota, Karol;  Richards, Fred D.;  Huston, David L.;  Jaques, A. Lynton;  Ghelichkhan, Sia
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/06
Evaluation of Southern Ocean cloud in the HadGEM3 general circulation model and MERRA-2 reanalysis using ship-based observations 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (11) : 6607-6630
作者:  Kuma, Peter;  Mcdonald, Adrian J.;  Morgenstern, Olaf;  Alexander, Simon P.;  Cassano, John J.;  Garrett, Sally;  Halla, Jamie;  Hartery, Sean;  Harvey, Mike J.;  Parsons, Simon;  Plank, Graeme;  Varma, Vidya;  Williams, Jonny
收藏  |  浏览/下载:9/0  |  提交时间:2020/06/09
The mechanisms and seasonal differences of the impact of aerosols on daytime surface urban heat island effect 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (11) : 6479-6493
作者:  Han, Wenchao;  Li, Zhanqing;  Wu, Fang;  Zhang, Yuwei;  Guo, Jianping;  Su, Tianning;  Cribb, Maureen;  Fan, Jiwen;  Chen, Tianmeng;  Wei, Jing;  Lee, Seoung-Soo
收藏  |  浏览/下载:14/0  |  提交时间:2020/06/09
Ensemble daily simulations for elucidating cloud-aerosol interactions under a large spread of realistic environmental conditions 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (11) : 6291-6303
作者:  Dagan, Guy;  Stier, Philip
收藏  |  浏览/下载:7/0  |  提交时间:2020/06/09
Characterizing atmospheric controls on winter urban pollution in a topographic basin setting using Radon-222 期刊论文
ATMOSPHERIC RESEARCH, 2020, 237
作者:  Kikaj, Dafina;  Chambers, Scott D.;  Kobal, Matjaz;  Crawford, Jagoda;  Vaupotic, Janja
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/02
Radon  Stability  Persistent temperature inversion  Complex topography  Urban pollution