1,2,1,2,- 1Lomonosov Moscow State University, Moscow, Russia
- 2Obukhov Institute of Atmospheric Physics, Russian Academy of Sciences, Moscow, Russia
- 3Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences, Moscow, Russia
As urban areas grow, understanding the impact of built environments on aerosol distribution is crucial for accurate monitoring and forecasting of urban air quality and for development of mitigation strategies. In this study we use a modern approach, which combines micro-scale Large Eddy Simulation with Local Climate Zones (LCZ) classification to simulate the transport of Lagrangian aerosol particles in different urban configurations. The study simulates several urban configurations based on LCZ classification, specifically open LCZ types, varying in building height and aspect ratio: LCZ 4 (high-rise), LCZ 5 (mid-rise), LCZ 6 (low-rise). Both regular and randomized urban development configurations were examined to understand the impact of building geometry on particle dispersion. The transport of particulate matter emitted from a linear source within a street canyon has been simulated under neutral atmospheric conditions.
The study reveals that the orientation of buildings significantly influences the distribution of particles. Structures parallel to the wind add horizontal dispersion, while those perpendicular promote vertical mixing. Variations in particle concentrations in randomized configurations highlight the role of architectural heterogeneity in turbulence development and aerosol dispersion. In the absence of regular homogeneous structures, the aggregated block- and district-scale geometry of buildings strongly influences aerosol transport. In randomized urban configurations, the large-scale morphological characteristics of different LCZ types have a significantly greater effect on particle dispersion than the local geometrical differences between configurations within the same LCZ.
Future research is recommended to take into account diverse meteorological conditions and a wider range of LCZ types to enhance the accuracy and applicability of this approach.
The work is supported by RSF grant 24-17-00155.
How to cite: Varentsov, A., Mortikov, E., Stepanenko, V., and Glazunov, A.: Large-eddy simulation of aerosol transport in various types of urban development based on local climate zones classification, 12th International Conference on Urban Climate, Rotterdam, The Netherlands, 7–11 Jul 2025, ICUC12-947, https://doi.org/10.5194/icuc12-947, 2025.
Supporters & sponsors
