Improving the Jarvis-type model with modified temperature and radiation functions for sap flow simulations

Hailong Wang* (Corresponding Author), Huade Guan, Na Liu, Chris Soulsby, Doerthe Tetzlaff, Xinping Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Since Professor Paul G. Jarvis proposed a scheme in 1976 that relates stomatal conductance with environmental variables, there have been numerous studies exploring the relationships for estimating transpiration (Ec). Vapor pressure deficit (D) and solar radiation (R) are dominant environmental factors influencing Ec, whilst air temperature (T) is deemed important but often neglected in model applications since D and T are exponentially correlated. Thus, it is uncertain whether to construct the Jarvis-type Ec models with both T and D included will improve model performance. Meanwhile, it is worth mentioning that most Jarvis-type models cannot simulate nocturnal sap flow which has been observed across a wide range of species and climates. Therefore, this study was firstly aimed at developing a generalized temperature stress function and testing its role in the Jarvis-type model, and further improving the model by modifying a widely used radiation function for nocturnal sap flow simulations. The results show that inclusion of a T-stress function for hourly sap flow simulations can avoid overestimation of daily peaks, and the modified Jarvis-type model was able to capture the nocturnal sap flow. These improvements revive the model for ecohydrological applications in a future climate where enhanced temperature effects and increasing nocturnal transpiration resulting from rising nighttime vapor pressure deficits are likely.

Original languageEnglish
Article number124981
Number of pages10
JournalJournal of Hydrology
Early online date20 Apr 2020
Publication statusPublished - Aug 2020

Bibliographical note


The relevant field work was supported by the Leverhulme Trust, United Kingdom [grant No. RPG-2014-016] and the European Research Council, Belgium [grant No. GA335910], the Australian National Centre for Groundwater Research and Training, Australia, and the National Natural Science Foundation of China, China [grant No. 41571021 & 41472238] in Aberdeen, Adelaide, and Changsha sites. The current work of the first author is supported by the Guangdong Provincial Department of Science and Technology, China [2019ZT08G090], and the Open Research Fund of State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China [IWHR-SKL-201920]. We sincerely thank the two anonymous reviewers for their valuable comments and suggestions towards the improvement of this manuscript.


  • Environmental changes
  • Jarvis-type model
  • Nocturnal sap flow
  • Stomatal conductance
  • Transpiration


Dive into the research topics of 'Improving the Jarvis-type model with modified temperature and radiation functions for sap flow simulations'. Together they form a unique fingerprint.

Cite this