@article{3b12228e78d944908277ab8721877f17,
title = "A Global Assessment of Terrestrial Evapotranspiration Increase Due to Surface Water Area Change",
abstract = "Surface water, which is changing constantly, is a crucial component in the global water cycle, as it greatly affects the water flux between the land and the atmosphere through evaporation. However, the influences of changing surface water area on the global water budget have largely been neglected. Here we estimate an extra water flux of 30.38 ± 15.51 km3/year omitted in global evaporation calculation caused by a net increase of global surface water area between periods 1984–1999 and 2000–2015. Our estimate is at a similar magnitude to the recent average annual change in global evapotranspiration assuming a stationary surface water area. It is also comparable to the estimated trends in various components of the hydrological cycle such as precipitation, discharge, groundwater depletion, and glacier melting. Our findings suggest that the omission of surface water area changes may cause considerable biases in global evaporation estimation, so an improved understanding of water area dynamics and its atmospheric coupling is crucial to reduce the uncertainty in the estimation of future global water budgets.",
keywords = "evaporation, evapotranspiration, global, surface water, water cycle",
author = "Shengan Zhan and Chunqiao Song and Jida Wang and Yongwei Sheng and Jiping Quan",
note = "Funding Information: This study was supported in part by the National Key R & D Program of China (Grants 2018YFD0900804 and 2018YFD1100101) and the Thousand Young Talents Program in China to C. Song and in part by the U.S. Geological Survey (USGS) Landsat Science Team Program Grant G12PC00071, the National Aeronautics and Space Administration (NASA) Terrestrial Hydrology Program under Grant NNX08AE51G, and Surface Water and Ocean Topography (SWOT) Program under Grant NNX16AH85G to Y. Sheng. The authors appreciate two anonymous reviewers and editor for their constructive comments that greatly helped to improve the study. We thank Austin Madson for editing the language of this paper. We also thank the Global Surface Water Database, the Commonwealth Scientific and Industrial Research Organization, the National Aeronautics Space and Administration Goddard Earth Sciences Data Information Services Center, Global Land Evaporation Amsterdam Model, the Numerical Terradynamic Simulation Group at University of Montana, the World Wildlife Fund, the National Catchment and Stream Environment Database, and the Global Drainage Basin Database for making the data sets used in this study publicly available. The source of the data sets can be found in section. Funding Information: This study was supported in part by the National Key R & D Program of China (Grants 2018YFD0900804 and 2018YFD1100101) and the Thousand Young Talents Program in China to C. Song and in part by the U.S. Geological Survey (USGS) Landsat Science Team Program Grant G12PC00071, the National Aeronautics and Space Administration (NASA) Terrestrial Hydrology Program under Grant NNX08AE51G, and Surface Water and Ocean Topography (SWOT) Program under Grant NNX16AH85G to Y. Sheng. The authors appreciate two anonymous reviewers and editor for their constructive comments that greatly helped to improve the study. We thank Austin Madson for editing the language of this paper. We also thank the Global Surface Water Database, the Commonwealth Scientific and Industrial Research Organization, the National Aeronautics Space and Administration Goddard Earth Sciences Data Information Services Center, Global Land Evaporation Amsterdam Model, the Numerical Terradynamic Simulation Group at University of Montana, the World Wildlife Fund, the National Catchment and Stream Environment Database, and the Global Drainage Basin Database for making the data sets used in this study publicly available. The source of the data sets can be found in section 2. Publisher Copyright: {\textcopyright}2019. The Authors.",
year = "2019",
month = mar,
doi = "10.1029/2018EF001066",
language = "English (US)",
volume = "7",
pages = "266--282",
journal = "Earth's Future",
issn = "2328-4277",
publisher = "John Wiley & Sons, Ltd.",
number = "3",
}