Verification and Case Studies for Urban Effects in HIRLAM Numerical Weather Forecasting

  • Alexander MahuraEmail author
  • Alexander Baklanov
  • Claus Petersen
  • Niels W. Nielsen
  • Bjarne Amstrup


In our study, the performance of the DMI HIgh Resolution Limited Area Models (HIRLAM)-U01/I01 research models (1.4 km horizontal resolution) with simple (urban roughness and anthropogenic heat flux) and complex (building effects parameterizations) urbanization were tested and verified. The simulations of the DMI-HIRLAM-U01/I01 without (i.e. the control run) and with the urbanized modules were performed in a short-term mode, i.e. for days with different meteorological conditions (such as typical and low winds), and in a long-term mode on a monthly basis. The comparison of the DMI-HIRLAM urbanized vs. control runs during the same period was performed. Detailed analyses of spatial and temporal variability of simulated conditions such as the wind characteristics, temperature and relative humidity over the metropolitan area of Copenhagen and surroundings were then completed. The diurnal variability of meteorological and derived characteristics over these urban areas was investigated. The verification of these characteristics was performed for selected urban/suburban stations located in the Copenhagen area.


Wind Velocity Street Canyon Numerical Weather Prediction Numerical Weather Prediction Model Meteorological Field 
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We are grateful to the COST Action 728 which actually influenced the carrying out of this study. In this study the DMI facilities of NEC SX6 had been used for simulations. Thanks for advice to the DMI EDB Computer Support Department. This research is done within the frameworks of the DMI-Enviro-HIRLAM project activities.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Alexander Mahura
    • 1
    Email author
  • Alexander Baklanov
    • 1
  • Claus Petersen
    • 1
  • Niels W. Nielsen
    • 1
  • Bjarne Amstrup
    • 1
  1. 1.Danish Meteorological Institute, DMICopenhagenCopenhagen

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