中文版 | English

在结果中检索

GSTDTAP

浏览/检索结果: 共15条，第1-10条 帮助

限定条件        
已选(0)清除 条数/页：   排序方式：
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：6/0  |  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.


  
Characterizing Biases in Mountain Snow Accumulation From Global Data Sets 期刊论文
WATER RESOURCES RESEARCH, 2019
作者:  Wrzesien, Melissa L.;  Pavelsky, Tamlin M.;  Durand, Michael T.;  Dozier, Jeff;  Lundquist, Jessica D.
收藏  |  浏览/下载：8/0  |  提交时间：2020/02/16
snow accumulation  global reanalysis  regional modeling  snow water equivalent  
Comparing Discharge Estimates Made via the BAM Algorithm in High-Order Arctic Rivers Derived Solely From Optical CubeSat, Landsat, and Sentinel-2 Data 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (9) : 7753-7771
作者:  Feng, Dongmei;  Gleason, Colin J.;  Yang, Xiao;  Pavelsky, Tamlin M.
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
Temporally Variable Stream Width and Surface Area Distributions in a Headwater Catchment 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (8) : 7166-7181
作者:  Barefoot, Eric;  Pavelsky, Tamlin M.;  Allen, George H.;  Zimmer, Margaret A.;  McGlynn, Brian L.
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/27
Global Reconstruction of Naturalized River Flows at 2.94 Million Reaches 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (8) : 6499-6516
作者:  Lin, Peirong;  Pan, Ming;  Beck, Hylke E.;  Yang, Yuan;  Yamazaki, Dai;  Frasson, Renato;  David, Cedric H.;  Durand, Michael;  Pavelsky, Tamlin M.;  Allen, George H.;  Gleason, Colin J.;  Wood, Eric F.
收藏  |  浏览/下载：41/0  |  提交时间：2019/11/27
MERIT Hydro: A High-Resolution Global Hydrography Map Based on Latest Topography Dataset 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (6) : 5053-5073
作者:  Yamazaki, Dai;  Ikeshima, Daiki;  Sosa, Jeison;  Bates, Paul D.;  Allen, George H.;  Pavelsky, Tamlin M.
收藏  |  浏览/下载：13/0  |  提交时间：2019/11/26
global hydrology  hydrography  river network  topography  
A Reassessment of North American River Basin Cool-season precipitation: Developments From a New Mountain Climatology Data Set 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (4) : 3502-3519
作者:  Wrzesien, Melissa L.;  Durand, Michael T.;  Pavelsky, Tamlin M.
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/26
Global Relationships Between River Width, Slope, Catchment Area, Meander Wavelength, Sinuosity, and Discharge 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (6) : 3252-3262
作者:  Frasson, Renato Prata de Moraes;  Pavelsky, Tamlin M.;  Fonstad, Mark A.;  Durand, Michael T.;  Allen, George H.;  Schumann, Guy;  Lion, Christine;  Beighley, R. Edward;  Yang, Xiao
收藏  |  浏览/下载：13/0  |  提交时间：2019/11/26
fluvial geomorphology  hydrology  remote sensing  
Arctic-Boreal Lake Dynamics Revealed Using CubeSat Imagery 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (4) : 2111-2120
作者:  Cooley, Sarah W.;  Smith, Laurence C.;  Ryan, Jonathan C.;  Pitcher, Lincoln H.;  Pavelsky, Tamlin M.
收藏  |  浏览/下载：5/0  |  提交时间：2019/04/09
CubeSats  remote sensing  Arctic-Boreal lakes  arctic hydrology  machine learning  
AirSWOT InSAR Mapping of Surface Water Elevations and Hydraulic Gradients Across the Yukon Flats Basin, Alaska 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (2) : 937-953
作者:  Pitcher, Lincoln H.;  Pavelsky, Tamlin M.;  Smith, Laurence C.;  Moller, Delwyn K.;  Altenau, Elizabeth H.;  Allen, George H.;  Lion, Christine;  Butman, David;  Cooley, Sarah W.;  Fayne, Jessica V.;  Bertram, Mark
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/26
Arctic-Boreal surface water hydrology  AirSWOT  Surface Water Ocean Topography (SWOT) satellite mission  Yukon River Flats  permafrost