Online coupled modeling of weather and air quality of budapest using the WRF-chem model

Attila Kovács, Ádám Leelőssy, Róbert Mészáros, István Lagzi

Research output: Contribution to journalArticle


⎯WRF-Chem is a numerical Eulerian non-hydrostatic mesoscale weather prediction model online coupled with the atmospheric chemistry model, developed mainly by the National Center for Atmospheric Research (NCAR) and the National Oceanic and Atmospheric Administration (NOAA). This model system is a frequently used tool for creating high resolution air quality simulations at different spatial and temporal scales for various air pollutants. In this study, the technical backgrounds of the WRF-Chem model applied for high resolution urban air quality forecasts in Budapest are presented. The meteorological module of the system uses the WRF-ARW (Weather Research and Forecasting – Advanced Research WRF) dynamical solver, and obtains its initial and boundary conditions from the GFS (Global Forecast System) using a horizontal resolution of 0.25 × 0.25 degree. By applying two nested model domains (with 15 × 5 km horizontal resolution), fine resolution meteorological fields can be achieved. In the chemical module, the National Emission Inventories created by the Hungarian Meteorological Service were applied, different chemical reaction sets were used and tested, and constant deposition rates were assumed. In this work, a case study for different pollutants (O3, NO, NO2, and CO) is presented for an early summer period of 2015.

Original languageEnglish
Pages (from-to)203-215
Number of pages13
Issue number2
Publication statusPublished - 2019


  • Air pollution
  • Photochemical mechanism
  • Tropospheric ozone
  • WRF-Chem

ASJC Scopus subject areas

  • Atmospheric Science

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