The subproject P3 will perform measurements of water fluxes and their isotopy within the land-atmosphere system to investigate water-related processes with high temporal and spatial resolution (e.g. using canopy and leaf chambers for evapotranspiration and transpiration and membrane probes for soil water isotope measurements). These coupled measurements will result in a novel isotope measurement platform that will allow us to systematically determine the contribution of different soil depths to root water uptake and root water uptake patterns of two crops (maize and wheat) at LAFO. In addition, water transit times will be determined and evapotranspiration partitioning will be performed and evaluated using the isotope data collected.
