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Fair-share carbon dioxide removal increases major emitter responsibility 期刊论文
NATURE CLIMATE CHANGE, 2020
作者:  Fyson, Claire L.;  Baur, Susanne;  Gidden, Matthew;  Schleussner, Carl-Friedrich
收藏  |  浏览/下载:19/0  |  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.


  
Observing carbon dioxide emissions over China's cities and industrial areas with the Orbiting Carbon Observatory-2 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (14) : 8501-8510
作者:  Zheng, Bo;  Chevallier, Frederic;  Ciais, Philippe;  Broquet, Gregoire;  Wang, Yilong;  Lian, Jinghui;  Zhao, Yuanhong
收藏  |  浏览/下载:17/0  |  提交时间:2020/08/09
Predicting secondary organic aerosol phase state and viscosity and its effect on multiphase chemistry in a regional-scale air quality model 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (13) : 8201-8225
作者:  Schmedding, Ryan;  Rasool, Quazi Z.;  Zhang, Yue;  Pye, Havala O. T.;  Zhang, Haofei;  Chen, Yuzhi;  Surratt, Jason D.;  Lopez-Hilfiker, Felipe D.;  Thornton, Joel A.;  Goldstein, Allen H.;  Vizuete, William
收藏  |  浏览/下载:12/0  |  提交时间:2020/07/21
Polar semivolatile organic compounds in biomass-burning emissions and their chemical transformations during aging in an oxidation flow reactor 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (13) : 8227-8250
作者:  Sengupta, Deep;  Samburova, Vera;  Bhattarai, Chiranjivi;  Watts, Adam C.;  Moosmueller, Hans;  Khlystov, Andrey Y.
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/21
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
The Orinoco Low-Level Jet: An Investigation of Its Mechanisms of Formation Using the WRF Model 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Jimenez-Sanchez, Giovanni;  Markowski, Paul M.;  Young, George S.;  Stensrud, David J.
收藏  |  浏览/下载:11/0  |  提交时间:2020/08/18
Orinoco low-level jet  forcing mechanisms  dynamical downscaling  momentum balance analysis  LLJs near the equator may originate from processes other than the inertial oscillation  LLJs near the equator may originate from processes other than topographic thermal forcing  
Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Honomichl, Shawn B.;  Pan, Laura L.
收藏  |  浏览/下载:14/0  |  提交时间:2020/08/18
Asian Monsoon Transport  Upper Tropospheric Chemical Composition  Trajectory Modeling  
Rapid winter warming could disrupt coastal marine fish community structure 期刊论文
NATURE CLIMATE CHANGE, 2020
作者:  Clark, Nicholas J.;  Kerry, James T.;  Fraser, Ceridwen I.
收藏  |  浏览/下载:13/0  |  提交时间:2020/07/21
The short-term impacts of COVID-19 lockdown on urban air pollution in China 期刊论文
NATURE SUSTAINABILITY, 2020
作者:  He, Guojun;  Pan, Yuhang;  Tanaka, Takanao
收藏  |  浏览/下载:15/0  |  提交时间:2020/07/09