作者
Anna M Ukkola, I Colin Prentice, Trevor F Keenan, Albert IJM Van Dijk, Neil R Viney, Ranga B Myneni, Jian Bi
发表日期
2016/1
期刊
Nature Climate Change
卷号
6
期号
1
页码范围
75-78
出版商
Nature Publishing Group UK
简介
Global environmental change has implications for the spatial and temporal distribution of water resources, but quantifying its effects remains a challenge. The impact of vegetation responses to increasing atmospheric CO2 concentrations on the hydrologic cycle is particularly poorly constrained,,. Here we combine remotely sensed normalized difference vegetation index (NDVI) data and long-term water-balance evapotranspiration (ET) measurements from 190 unimpaired river basins across Australia during 1982–2010 to show that the precipitation threshold for water limitation of vegetation cover has significantly declined during the past three decades, whereas sub-humid and semi-arid basins are not only ‘greening’ but also consuming more water, leading to significant (24–28%) reductions in streamflow. In contrast, wet and arid basins show nonsignificant changes in NDVI and reductions in ET. These …
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AM Ukkola, IC Prentice, TF Keenan, AIJM Van Dijk… - Nature Climate Change, 2016