Disentangling climatic and anthropogenic controls on terrestrial ET trends
September 8, 2015
Examine natural and anthropogenic controls on terrestrial evapotranspiration (ET) changes from 1982 to 2010.
- We created a diagnostic tool combining ET information from 11 long-term datasets. All input datasets were based on extensive in situ observations, satellite retrievals, or both.
- We used this diagnostic tool to evaluate single-factor and multi-factor simulations from the Multi-Scale Synthesis and Terrestrial Model Intercomparison Project (MsTMIP).
- Changing climate was assessed to be the dominant control on spatiotemporal variations in ET.
- Rising atmospheric CO2 concentration was the second most important factor influencing ET, with higher CO2 driving a decreasing trend in ET.
- Nitrogen deposition slightly amplified global ET via enhanced plant growth. Land-use-induced ET responses were minor globally but pronounced locally.
- Multi-stream datasets and multi-modeling frameworks help to quantify the strengthening anthropogenic fingerprint on the global hydrologic cycle.
Mao, Jiafu, Wenting Fu, Xiaoying Shi, Daniel M. Ricciuto, Joshua B. Fisher, Robert E. Dickinson, Yaxing Wei, Willis Shem, Shilong Piao, Kaicun Wang, Christopher R. Schwalm, Hanqin Tian, Mingquan Mu, Altaf Arain, Philippe Ciais, Robert Cook, Yongjiu Dai, Daniel Hayes, Forrest M. Hoffman, Maoyi Huang, Suo Huang, Deborah N. Huntzinger, Akihiko Ito, Atul Jain, Anthony W. King, Huimin Lei, Chaoqun Lu, Anna M. Michalak, Nicholas Parazoo, Changhui Peng, Shushi Peng, Benjamin Poulter, Kevin Schaefer, Elchin Jafarov, Peter E. Thornton, Weile Wang, Ning Zeng, Zhenzhong Zeng, Fang Zhao, Qiuan Zhu, and Zaichun Zhu. September 8, 2015. “Disentangling Climatic and Anthropogenic Controls on Global Terrestrial Evapotranspiration Trends.” Environ. Res. Lett., 10(9):094008. doi:10.1088/1748-9326/10/9/094008.