Improvement of a simplified process‐based model for estimating transpiration under water‐limited conditions

• DOI: 10.1002/hyp.13430
• Publication Date: 2019-03-06T18:53:36Z
• Authors: Na Liu; Thomas N. Buckley; Xinguang He; Xinping Zhang; Cicheng Zhang; Zidong Luo; Hailong Wang; Nasrin Sterling; Huade Guan
• Keywords: Water balance; Water potential

Abstract Plant transpiration depends on environmental conditions, and soil water availability is its primary control under deficit conditions. In this study, we improve a simplified process‐based model (hereafter “BTA”) by including potential ( ψ ) to explicitly represent the dependence of plant root‐zone moisture The improved denoted as BTA‐ψ model. We assessed performance BTA models in subtropical monsoon climate Mediterranean with different levels stress. performed reasonably estimating daily hourly sufficient but it failed during dry periods. Overall, provided significant improvement for wide range Although both could estimate (sap flow) at night, was superior regard. Species differences calibrated parameters were consistent leaf‐level photosynthetic measurements each species, expected given physiological basis these parameters. With representation regulation reasonable across provides useful alternative purely empirical modelling transpiration.