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Online tool helps estimate COVID's true toll on sub-Saharan Africa 新闻
来源平台：EurekAlert. 发布日期：2021
作者:  admin
收藏  |  浏览/下载：5/0  |  提交时间：2021/02/18
Wildfire on the rise since 1984 in Northern California's coastal ranges 新闻
来源平台：EurekAlert. 发布日期：2020
作者:  admin
收藏  |  浏览/下载：0/0  |  提交时间：2020/09/22
Wildfire on the rise since 1984 in Northern California's coastal ranges 新闻
来源平台：EurekAlert. 发布日期：2020
作者:  admin
收藏  |  浏览/下载：1/0  |  提交时间：2020/09/22
The past and future of global river ice 期刊论文
NATURE, 2020, 577 (7788) : 69-+
作者:  Yang, Xiao;  Pavelsky, Tamlin M.;  Allen, George H.
收藏  |  浏览/下载：7/0  |  提交时间：2020/05/13

More than one-third of Earth'  s landmass is drained by rivers that seasonally freeze over. Ice transforms the hydrologic(1,2), ecologic(3,4), climatic(5) and socio-economic(6-8) functions of river corridors. Although river ice extent has been shown to be declining in many regions of the world(1), the seasonality, historical change and predicted future changes in river ice extent and duration have not yet been quantified globally. Previous studies of river ice, which suggested that declines in extent and duration could be attributed to warming temperatures(9,10), were based on data from sparse locations. Furthermore, existing projections of future ice extent are based solely on the location of the 0-degrees C isotherm11. Here, using satellite observations, we show that the global extent of river ice is declining, and we project a mean decrease in seasonal ice duration of 6.10 +/- 0.08 days per 1-degrees C increase in global mean surface air temperature. We tracked the extent of river ice using over 400,000 clear-sky Landsat images spanning 1984-2018 and observed a mean decline of 2.5 percentage points globally in the past three decades. To project future changes in river ice extent, we developed an observationally calibrated and validated model, based on temperature and season, which reduced the mean bias by 87 per cent compared with the 0-degree-Celsius isotherm approach. We applied this model to future climate projections for 2080-2100: compared with 2009-2029, the average river ice duration declines by 16.7 days under Representative Concentration Pathway (RCP) 8.5, whereas under RCP 4.5 it declines on average by 7.3 days. Our results show that, globally, river ice is measurably declining and will continue to decline linearly with projected increases in surface air temperature towards the end of this century.


  
Rapidly declining remarkability of temperature anomalies may obscure public perception of climate change 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (11) : 4905-4910
作者:  Moore, Frances C.;  Obradovich, Nick;  Lehner, Flavio;  Baylis, Patrick
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
climate change  perception  Twitter  baseline  temperature  
Abrupt global-ocean anoxia during the Late Ordovician-early Silurian detected using uranium isotopes of marine carbonates 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (23) : 5896-5901
作者:  Bartlett, Rick;  Elrick, Maya;  Wheeley, James R.;  Polyak, Victor;  Desrochers, Andre;  Asmerom, Yemane
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
Late Ordovician extinction  U isotopes  seawater redox  ocean anoxic event  glaciation  
Climatic control of Mississippi River flood hazard amplified by river engineering 期刊论文
NATURE, 2018, 556 (7699) : 95-+
作者:  Munoz, Samuel E.;  39;Donnell, Michelle
收藏  |  浏览/下载：4/0  |  提交时间：2019/11/27
Rainfall statistics, stationarity, and climate change 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (10) : 2305-2310
作者:  Sun, Fubao;  Roderick, Michael L.;  Farquhar, Graham D.
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/27
precipitation  stationarity  variance  
Accelerated body size evolution during cold climatic periods in the Cenozoic 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2017, 114 (16) : 4183-4188
作者:  Clavel, Julien;  Morlon, Helene
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/27
evolutionary rates  macroevolution  climate  endotherms  phylogenetics  
Air- and Stream-Water-Temperature Trends in the Chesapeake Bay Region, 1960-2014 科技报告
来源：US Geological Survey (USGS). 出版年： 2015
作者:  [null]
收藏  |  浏览/下载：0/0  |  提交时间：2019/04/05