Arid
DOI10.1073/pnas.0913139107
Response of Colorado River runoff to dust radiative forcing in snow
Painter, Thomas H.1,2; Deems, Jeffrey S.3,4; Belnap, Jayne5; Hamlet, Alan F.6; Landry, Christopher C.7; Udall, Bradley4
通讯作者Painter, Thomas H.
来源期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2010
卷号107期号:40页码:17125-17130
英文摘要

The waters of the Colorado River serve 27 million people in seven states and two countries but are overallocated by more than 10% of the river’s historical mean. Climate models project runoff losses of 7-20% from the basin in this century due to human-induced climate change. Recent work has shown however that by the late 1800s, decades prior to allocation of the river’s runoff in the 1920s, a fivefold increase in dust loading from anthropogenically disturbed soils in the southwest United States was already decreasing snow albedo and shortening the duration of snow cover by several weeks. The degree to which this increase in radiative forcing by dust in snow has affected timing and magnitude of runoff from the Upper Colorado River Basin (UCRB) is unknown. Here we use the Variable Infiltration Capacity model with postdisturbance and pre-disturbance impacts of dust on albedo to estimate the impact on runoff from the UCRB across 1916-2003. We find that peak runoff at Lees Ferry, Arizona has occurred on average 3 wk earlier under heavier dust loading and that increases in evapotranspiration from earlier exposure of vegetation and soils decreases annual runoff by more than 1.0 billion cubic meters or similar to 5% of the annual average. The potential to reduce dust loading through surface stabilization in the deserts and restore more persistent snow cover, slow runoff, and increase water resources in the UCRB may represent an important mitigation opportunity to reduce system management tensions and regional impacts of climate change.


英文关键词aerosols land use change reflectivity snow melt
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000282512000016
WOS关键词BIOLOGICAL SOIL CRUSTS ; WATER AVAILABILITY ; CLIMATE ; MODEL ; CO2 ; IMPACTS ; TRENDS ; ENERGY ; DEPOSITION ; FLUXES
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构United States Geological Survey ; University of California, Los Angeles
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/166102
作者单位1.CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA;
2.Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA 90095 USA;
3.Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA;
4.Natl Ocean & Atmospher Adm Western Water Assessme, Boulder, CO 80309 USA;
5.US Geol Survey, SW Biol Ctr, Moab, UT 84532 USA;
6.Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA;
7.Ctr Snow & Avalanche Studies, Silverton, CO 81433 USA
推荐引用方式
GB/T 7714
Painter, Thomas H.,Deems, Jeffrey S.,Belnap, Jayne,et al. Response of Colorado River runoff to dust radiative forcing in snow[J]. United States Geological Survey, University of California, Los Angeles,2010,107(40):17125-17130.
APA Painter, Thomas H.,Deems, Jeffrey S.,Belnap, Jayne,Hamlet, Alan F.,Landry, Christopher C.,&Udall, Bradley.(2010).Response of Colorado River runoff to dust radiative forcing in snow.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,107(40),17125-17130.
MLA Painter, Thomas H.,et al."Response of Colorado River runoff to dust radiative forcing in snow".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 107.40(2010):17125-17130.
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