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High-Resolution Climate Projections Using the WRF Model on the HLRS

In: High Performance Computing in Science and Engineering ´16

Author

Listed:
  • Viktoria Mohr

    (University of Hohenheim, Institute of Physics and Meteorology)

  • Kirsten Warrach-Sagi

    (University of Hohenheim, Institute of Physics and Meteorology)

  • Thomas Schwitalla

    (University of Hohenheim, Institute of Physics and Meteorology)

  • Hans-Stefan Bauer

    (University of Hohenheim, Institute of Physics and Meteorology)

  • Volker Wulfmeyer

    (University of Hohenheim, Institute of Physics and Meteorology)

Abstract

The latest generation of climate projections for the twenty-first century are build on new emission scenarios based on Representative Concentration Pathways (RCPs). Within the world wide coordinated effort of the Coupled Model Intercomparison Project Phase 5 (CMIP5), their impact on climate is simulated with global general circulation models (GCMs) of the climate system with a spatial grid of 100–200 km resolution. High resolution information from a robust multi-model ensemble on possible ranges of future climate changes is essential for climate impact research and as background information for policy and economy. Within the Coordinated Regional Downscaling EXperiments (CORDEX), the global climate simulations are downscaled for most continental regions, e.g. a unique set of high resolution climate change simulations for Europe is currently established. This project contributes to this ensemble downscaling five GCM simulations from 1958 to 2100 with the Weather Research and Forecasting (WRF) model. The WRF simulations are currently performed with 0.44∘ and 0.11∘ resolution on the CRAY XC40 at the High Performance Computing Center Stuttgart (HLRS). First results of the simulations on the 0.44∘ grid for the “historical” period from 1971–2000 and as comparison for two different future scenarios from 2071–2099 show an increase of the average temperature by 2–4 ∘C with respect to the chosen emission scenario, especially in the southeastern and northeastern part of Europe. In the future scenario where a moderate Greenhouse Gas emission increase is projected, the annual average precipitation in Germany is indicated to experience a decrease by 50–100 l/m2. Considering the future scenario with a high projected emission increase, only marginal changes of the annual average precipitation are simulated.

Suggested Citation

  • Viktoria Mohr & Kirsten Warrach-Sagi & Thomas Schwitalla & Hans-Stefan Bauer & Volker Wulfmeyer, 2016. "High-Resolution Climate Projections Using the WRF Model on the HLRS," Springer Books, in: Wolfgang E. Nagel & Dietmar H. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering ´16, pages 577-587, Springer.
    • Handle: RePEc:spr:sprchp:978-3-319-47066-5_39
    DOI: 10.1007/978-3-319-47066-5_39
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