Author:
Wu Xinyue,Han Wangya,Yu Zhen
Abstract
Abstract
Numerous evapotranspiration (ET) products have been produced using various approaches and diverse forcing data even as the magnitude and trends of ET show divergence. We simulated ET using updated land use and cover change (LUCC) data in China from 1900 to 2020. We found that China’s ET increased slightly from 1900 to 1980, but it increased rapidly after 1980 due to LUCC characterized by forest expansion (2.05 mm yr−1, P < 0.01). We also found that the ET trends derived from our simulation were significantly higher than other ET products (−0.70–1.47 mm yr−1, P < 0.01), implying that existing, long-term ET products might have underestimated ET trends in China during the post-1980 period because of underrepresented LUCC. These underestimated ET trends could introduce biases in the regional water budget and water resources management. We advocate for future studies to take into account the impacts of LUCC in global ET simulations.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Reference47 articles.
1. Spatio-temporal variation of evapotranspiration and its attribution over the Loess Plateau since the implementation of the Grain for Green Project;Bai;Acta Ecol. Sin.,2023
2. Attribution analysis of changes in terrestrial evapotranspiration in China during 1982–2019;Bai;Acta Geogr Acta Georg. Sin,2023
3. Temporal and spatial variation of evapotranspiration and grassland vegetation cover in Duolun County, Inner Mongolia;Cheng;Remote Sens. NR,2020
4. Evapotranspiration depletes groundwater under warming over the contiguous United States;Condon;Nat. Commun.,2020
5. The future of evapotranspiration: global requirements for ecosystem functioning, carbon and climate feedbacks, agricultural management, and water resources;Fisher;Water Resour. Res.,2017