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Efficacy of cool roofs at reducing pedestrian-level air temperature during projected 21st century heatwaves in Atlanta, Detroit, and Phoenix (USA) 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (8)
作者:  Broadbent, Ashley M.;  Krayenhoff, E. Scott;  Georgescu, Matei
收藏  |  浏览/下载:17/0  |  提交时间:2020/08/18
urban climate  heat mitigation  cool roofs  urban expansion  climate change  WRF  cooling effectiveness  
Inferring CO(2)fertilization effect based on global monitoring land-atmosphere exchange with a theoretical model 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (8)
作者:  Ueyama, Masahito;  39;omi
收藏  |  浏览/下载:15/0  |  提交时间:2020/08/18
CO(2)fertilization effect  photosynthesis  evapotranspiration  eddy covariance  sun  shade model  
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:19/0  |  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.


  
Carbon loss from northern circumpolar permafrost soils amplified by rhizosphere priming 期刊论文
NATURE GEOSCIENCE, 2020
作者:  Keuper, Frida;  Wild, Birgit;  Kummu, Matti;  Beer, Christian;  Blume-Werry, Gesche;  Fontaine, Sebastien;  Gavazov, Konstantin;  Gentsch, Norman;  Guggenberger, Georg;  Hugelius, Gustaf;  Jalava, Mika;  Koven, Charles;  Krab, Eveline J.;  Kuhry, Peter;  Monteux, Sylvain;  Richter, Andreas;  Shahzad, Tanvir;  Weedon, James T.;  Dorrepaal, Ellen
收藏  |  浏览/下载:12/0  |  提交时间:2020/08/09
Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion 期刊论文
NATURE GEOSCIENCE, 2020
作者:  Yu, J.;  Menviel, L.;  Jin, Z. D.;  Anderson, R. F.;  Jian, Z.;  Piotrowski, A. M.;  Ma, X.;  Rohling, E. J.;  Zhang, F.;  Marino, G.;  McManus, J. F.
收藏  |  浏览/下载:12/0  |  提交时间:2020/08/09
Black Carbon and Precipitation: An Energetics Perspective 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Sand, M.;  Samset, B. H.;  Tsigaridis, K.;  Bauer, S. E.;  Myhre, G.
收藏  |  浏览/下载:14/0  |  提交时间:2020/08/18
black carbon aerosols  rapid adjustments  precipitation  energy budget  
Temperature Inversion and Clouds Over the Arctic Ocean Observed by the 5th Chinese National Arctic Research Expedition 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Wang, Ding;  Guo, Jianping;  Chen, Aijun;  Bian, Lingen;  Ding, Minghu;  Liu, Lin;  Lv, Yanmin;  Li, Jian;  Guo, Xiaoran;  Han, Yi
收藏  |  浏览/下载:14/0  |  提交时间:2020/08/18
cloud  temperature inversion  radiosonde  Arctic  
Multimodel Future Projections of the Regional Vegetation-Climate System Over East Asia: Comparison Between Two Ensemble Approaches 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Liu, Weiguang;  Wang, Guiling;  Yu, Miao;  Chen, Haishan;  Jiang, Yelin
收藏  |  浏览/下载:13/0  |  提交时间:2020/08/18
climate change  East Asia  multimodel ensemble  vegetation-climate interactions  
An Evaluation of the Large-Scale Atmospheric Circulation and Its Variability in CESM2 and Other CMIP Models 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Simpson, Isla R.;  Bacmeister, Julio;  Neale, Richard B.;  Hannay, Cecile;  Gettelman, Andrew;  Garcia, Rolando R.;  Lauritzen, Peter H.;  Marsh, Daniel R.;  Mills, Michael J.;  Medeiros, Brian;  Richter, Jadwiga H.
收藏  |  浏览/下载:17/0  |  提交时间:2020/08/18
CESM2  evaluation  large-scale circulation  extratropical variability  CMIP6  modeling  
Diurnal Cycle of Precipitation Over the Maritime Continent Under Modulation of MJO: Perspectives From Cloud-Permitting Scale Simulations 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (13)
作者:  Wei, Yuntao;  Pu, Zhaoxia;  Zhang, Chidong
收藏  |  浏览/下载:9/0  |  提交时间:2020/08/18
tropical convection  diurnal cycle of precipitation  cloud-permitting simulation  MJO