(06/2018 – 06/2021)
GlobalCDA 2
Contemporary global hydrological (or land surface) models provide conflicting estimates of e.g. mean annual evapotranspiration or low, mean, and high flows in river basins, resulting in strongly differing estimates of current water availability or climate change impact on freshwater resources. The central objective of GlobalCDA and its continuation project GlobalCDA 2 is to improve our understanding of global freshwater resources and obtain better estimates of continental water fluxes and storages.
CDA stands for calibration/data assimilation, an approach that focuses on combining geodetic and remote sensing information with modelling efforts. Within the original project and its continuation, we:
- Develop a suitable methodology to combine observational data of model output variables with hydrological models in an optimal manner.
- Use this methodology with the global hydrological model WaterGAP to provide an improved assessment of freshwater fluxes and storages including their uncertainties in response to climate and anthropogenic forcing.
As with the initial GlobalCDA project, the continuation GlobalCDA 2 is a collaboration of ten institutions. The participants are leaders in hydrological model development, remote sensing, and the emerging field of hydrogeodesy. Next to DLR, the University of Bonn, Goethe University Frankfurt, GFZ (German Research Centre for Geosciences) Potsdam, HafenCity University Hamburg, Technical University of Munich, University of Stuttgart, University of Zurich, University of Luxembourg and University of Hohenheim are involved.
GlobalCDA2