Changes of actual evapotranspiration and its components in the Yangtze River valley during 1980–2014 from satellite assimilation product

  • Jiao Lu
  • Guojie WangEmail author
  • Tiantian Gong
  • Daniel Fiifi T. Hagan
  • Yanjun Wang
  • Tong Jiang
  • Buda Su
Original Paper


Evapotranspiration (ET) is an important process of water and energy exchanges between land and atmosphere. In this study, a processed-based GLEAM (global land-surface evaporation: the Amsterdam methodology) satellite assimilation product has been validated in the Yangtze River valley on the observations of flux and the water balance method. The changes of total ET and its components, well as the associated dynamics, have been analyzed for the period of 1980–2014. The total ET shows significant increasing trends especially in the middle and lower reaches of the Yangtze River valley, which is mostly due to the increase of transpiration. The spatial and temporal dynamics of total ET are analyzed with respect to temperature, precipitation, and solar radiation. The spatial pattern of total ET in the Yangtze River valley is found to be jointly determined by temperature and precipitation. As for the temporal dynamics, precipitation plays the dominant role in total ET in the source regions of the valley. While in the most regions, solar radiation is suggested to be a main controller, in the positive manner, of total ET. This may provide an in-depth understanding of ET changes in the warming climate, and form a basis for water resource management in the Yangtze River valley.


Author contributions

Jiao Lu and Guojie Wang conceived this study and performed the data analysis and wrote the manuscript. All the other authors are actively involved in the discussions.

Funding information

This study is supported by National Key Research and Development Program of China (2017YFA0603701) and National Natural Science Foundation of China (41561124014, 41375099).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Geographical SciencesNanjing University of Information Science & TechnologyNanjingChina
  2. 2.National Climate CenterChina Meteorological AdministrationBeijingChina

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