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This study explores the impact of two planetary boundary layer (PBL) parameterisations on simulated concentrations of four main air pollutants (ozone, nitrogen dioxide [NO2], and particulate matter [PM] with diameters of < 10 and < 2.5 µm), and evaluates their results against radiosonde measurements in Europe. The two PBL parameterisations used are (i) based on the bulk Richardson number approach under stable conditions and the Brunt-Väisälä frequency under neutral and stable conditions, and (ii) based on turbulent kinetic energy. The regional chemical transport model MATCH was applied on a region of Western Europe. MATCH was forced by meteorological data from the HARMONIE–AROME numerical weather prediction model, using the same setup as in the ACCORD consortium. The horizontal resolution was 2.5 km × 2.5 km, over 65 vertical levels grouped in pairs in the MATCH model. The time frame for this study was during a heat wave in July 2022. The CAMS regional emissions were interpolated into the MATCH simulation grid. The preliminary results show that the MATCH model is overestimating the PBL height at noon, independently of the method used to calculate it in the model. Results are not conclusive for comparisons with observations at midnight. The impact on air quality predictions is mostly seen for ozone during the night, and on PM and NO2 during the first hours in the morning.

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MATCH Model Sensitivity to Boundary Layer Parameterisations at Higher Resolutions

  • 会议论文

  • 发表日期：

    2026年

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  • Ana C. Carvalho,
  • Lennart Robertson,
  • Robert Bergström,
  • Tinja Olenius,
  • Daniel Yagzi,
  • Jorge Amorim,
  • Rui Silva

摘要

This study explores the impact of two planetary boundary layer (PBL) parameterisations on simulated concentrations of four main air pollutants (ozone, nitrogen dioxide [NO2], and particulate matter [PM] with diameters of < 10 and < 2.5 µm), and evaluates their results against radiosonde measurements in Europe. The two PBL parameterisations used are (i) based on the bulk Richardson number approach under stable conditions and the Brunt-Väisälä frequency under neutral and stable conditions, and (ii) based on turbulent kinetic energy. The regional chemical transport model MATCH was applied on a region of Western Europe. MATCH was forced by meteorological data from the HARMONIE–AROME numerical weather prediction model, using the same setup as in the ACCORD consortium. The horizontal resolution was 2.5 km × 2.5 km, over 65 vertical levels grouped in pairs in the MATCH model. The time frame for this study was during a heat wave in July 2022. The CAMS regional emissions were interpolated into the MATCH simulation grid. The preliminary results show that the MATCH model is overestimating the PBL height at noon, independently of the method used to calculate it in the model. Results are not conclusive for comparisons with observations at midnight. The impact on air quality predictions is mostly seen for ozone during the night, and on PM and NO2 during the first hours in the morning.