Human-induced changes in the hydrology of the western United States

被引:848
作者
Barnett, Tim P. [1 ]
Pierce, David W. [1 ]
Hidalgo, Hugo G. [1 ]
Bonfils, Celine [2 ]
Santer, Benjamin D. [2 ]
Das, Tapash [1 ]
Bala, Govindasamy [2 ]
Wood, Andrew W. [3 ]
Nozawa, Toru [4 ]
Mirin, Arthur A. [2 ]
Cayan, Daniel R. [1 ,5 ]
Dettinger, Michael D. [1 ,5 ]
机构
[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[3] Univ Washington, Land Surface Hydrol Res Grp, Seattle, WA 98195 USA
[4] Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan
[5] US Geol Survey, La Jolla, CA 92093 USA
关键词
D O I
10.1126/science.1152538
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Observations have shown that the hydrological cycle of the western United States changed significantly over the last half of the 20th century. We present a regional, multivariable climate change detection and attribution study, using a high- resolution hydrologic model forced by global climate models, focusing on the changes that have already affected this primarily arid region with a large and growing population. The results show that up to 60% of the climate- related trends of river flow, winter air temperature, and snow pack between 1950 and 1999 are human- induced. These results are robust to perturbation of study variates and methods. They portend, in conjunction with previous work, a coming crisis in water supply for the western United States.
引用
收藏
页码:1080 / 1083
页数:4
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