Parameterization of evapotranspiration partitioning function in land-surface models using water stable isotopes (A03)

• Subject Area: Plant Physiology ; Soil Sciences ; Hydrogeology, Hydrology, Limnology, Urban Water Management, Water Chemistry, Integrated Water Resources Management
• Term: since 2022
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 450058266

A03 will conduct high frequency and non-destructive measurements of the stable isotopic composition of soil and plant water as well as of ambient air humidity at selected experimental sites covering the major plant functional types (PFT) represented in CLM5.0. The isotopic data will be used to parameterize the isotope-enabled SVAT model SiSPAT-Isotope for field-scale simulations of the transpiration – evapotranspiration rate T/ET for different PFT and climatic conditions. By this, the project will provide essential information for improving the PFT-specific parametrization of T/ET ratios in CLM5.0.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1502: Regional Climate Change: Disentangling the Role of Land Use and Water Management
• Applicant Institution: Rheinische Friedrich-Wilhelms-Universität Bonn
• Project Heads: Professor Dr. Nicolas Brüggemann; Professor Youri Rothfuss, Ph.D.