EGU2020-5745, updated on 12 Jun 2020
https://doi.org/10.5194/egusphere-egu2020-5745
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Intercomparison of terrestrial water budgets in EURO-CORDEX and TSMP evaluation runs

Mohamed Eltahan1,2, Klaus Goergen1,2, Carina Furusho-Percot1,2, and Stefan Kollet1,2
Mohamed Eltahan et al.
  • 1Institute of Bio- and Geosciences (Agrosphere, IBG-3), Research Centre Jülich, 52428 Jülich, Germany
  • 2Centre for High-Performance Scientific Computing in Terrestrial Systems, Geoverbund ABC/J, 52428 Jülich, Germany

Water is one of Earth’s most important geo-ecosystem components. Here we present an evaluation of water cycle components using 12 EURO-CORDEX Regional Climate Models (RCMs) and the Terrestrial Systems Modeling Platform (TSMP) from ERA-Interim driven evaluation runs. Unlike the other RCMs, TSMP provides an integrated representation of the terrestrial water cycle by coupling the numerical weather prediction model COSMO, the land surface model CLM and the surface-subsurface hydrological model ParFlow, which simulates shallow groundwater states and fluxes. The study analyses precipitation (P), evapotranspiration (E), runoff (R), and terrestrial water storage (TWS=P-E-R) at a 0.11degree spatial resolution (about 12km) on EUR-11 CORDEX grid from 1996 to 2008. As reference datasets, we use ERA5 reanalysis to represent the complete terrestrial water budget, as well as the E-OBS, GLEAM and E-Run datasets for precipitation, evapotranspiration and runoff, respectively. The terrestrial water budget is investigated for twenty catchments over Europe (Guadalquivir, Guadiana, Tagus, Douro, Ebro, Garonne, Rhone, Po, Seine, Rhine, Loire, Maas, Weser, Elbe, Oder, Vistuala, Danube, Dniester, Dnieper, and Neman). Annual cycles, seasonal variations, empirical frequency distributions, spatial distributions for the water cycle components and budgets over the catchments are assessed. The analysis demonstrates the capability of the RCMs and TSMP to reproduce the overall characteristics of the water cycle over the EURO-CORDEX domain, which is a prerequisite if, e.g., climate change projections with the CORDEX RCMs or TSMP are to be used for vulnerability, impacts, and adaptation studies.

How to cite: Eltahan, M., Goergen, K., Furusho-Percot, C., and Kollet, S.: Intercomparison of terrestrial water budgets in EURO-CORDEX and TSMP evaluation runs, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-5745, https://doi.org/10.5194/egusphere-egu2020-5745, 2020

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