Preprints
https://doi.org/10.5194/hess-2021-616
https://doi.org/10.5194/hess-2021-616
 
14 Jan 2022
14 Jan 2022
Status: a revised version of this preprint is currently under review for the journal HESS.

Attributing of global evapotranspiration trends based on the Budyko framework

Shijie Li1, Guojie Wang1, Chenxia Zhu1, Jiao Lu1, Waheed Ullah1, Daniel Fiifi Tawia Hagan1, Giri Kattel1,2,3, and Jian Peng4,5 Shijie Li et al.
  • 1Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC–FEMD), School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • 2Water and Agriculture Program (WEAP), Department of Infrastructure Engineering, The University of Melbourne, Melbourne 3010, Australia
  • 3Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
  • 4Department of Remote Sensing, Helmholtz Centre for Environmental Research-UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
  • 5Remote Sensing Centre for Earth System Research, Leipzig University, Talstr. 35, 04103, Leipzig, Germany

Abstract. Actual evapotranspiration (ET) is an essential variable in the hydrological process, linking the carbon, water, and energy cycles. Global ET has significantly changed in the warming climate. Although increasing vapour pressure deficit (VPD) due to global warming enhances atmospheric water demand, it remains unclear how the dynamics of ET are affected. In this study, using multiple datasets, we disentangled the relative contributions of precipitation, net radiation, air temperature (T1), VPD, and wind speed on affecting annual ET linear trend using an advanced separation method that considers the Budyko framework. It is found that the precipitation variability dominantly controls global ET in the dry climates, the net radiation has substantial control over ET in the tropical regions, and VPD is impacting ET trends in boreal mid-latitude climate. The critical role of VPD in controlling ET trends is particularly emphasized due to its influence in controlling the land-atmosphere interactions.

Shijie Li et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on hess-2021-616', Anonymous Referee #1, 18 Feb 2022
  • RC2: 'Comment on hess-2021-616', Anonymous Referee #2, 15 Mar 2022

Shijie Li et al.

Shijie Li et al.

Viewed

Total article views: 907 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
709 183 15 907 4 11
  • HTML: 709
  • PDF: 183
  • XML: 15
  • Total: 907
  • BibTeX: 4
  • EndNote: 11
Views and downloads (calculated since 14 Jan 2022)
Cumulative views and downloads (calculated since 14 Jan 2022)

Viewed (geographical distribution)

Total article views: 774 (including HTML, PDF, and XML) Thereof 774 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 25 May 2022
Download
Short summary
It is found that the precipitation variability dominantly controls global ET in the dry climates, the net radiation has substantial control over ET in the tropical regions, and VPD is impacting ET trends in boreal mid-latitude climate. The critical role of VPD in controlling ET trends is particularly emphasized due to its influence in controlling the land-atmosphere interactions.