Scholarlink

<p>Simulating weather phenomena with numerical weather prediction models at hectometric scales presents significant challenges. In this work, we present results obtained with ICON in limited-area mode, using the TERRA-URB urban canopy scheme at high resolution. The simulations focus on a domain in southern Italy, particularly the Lazio and Campania regions, during specific weather events like heat waves. The study analyses the interaction of this urban canopy scheme with grid resolution, turbulence schemes, soil initialization, land use heterogeneity and Anthropogenic Heat Fluxes (AHF) formulations. The main findings reveal that increasing grid resolution from 1.2 to 0.6 km improves the representation of urban features, particularly the Urban Heat Island (UHI) effect, with minor benefits for temperature and humidity accuracy. The adoption of LES turbulence scheme enhances the complex urban dynamics, but results in overestimation of nocturnal cooling and wind speeds. Seasonal Anthropogenic Heat Flux variability reduces warm nocturnal biases, providing a more realistic simulation of urban weather. These results highlight the potential of hectometric modelling, but identify limitations in turbulence parameterization and soil-atmosphere interaction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The impact of grid resolution, turbulence schemes and soil initialization over performances of ICON model with TERRA-URB at hectometric scale

  • 期刊论文

  • 发表日期：

    2025年12月10日

查看全文
  • Davide Cinquegrana,
  • Edoardo Bucchignani,
  • Myriam Montesarchio,
  • Alessandra Lucia Zollo

摘要

Simulating weather phenomena with numerical weather prediction models at hectometric scales presents significant challenges. In this work, we present results obtained with ICON in limited-area mode, using the TERRA-URB urban canopy scheme at high resolution. The simulations focus on a domain in southern Italy, particularly the Lazio and Campania regions, during specific weather events like heat waves. The study analyses the interaction of this urban canopy scheme with grid resolution, turbulence schemes, soil initialization, land use heterogeneity and Anthropogenic Heat Fluxes (AHF) formulations. The main findings reveal that increasing grid resolution from 1.2 to 0.6 km improves the representation of urban features, particularly the Urban Heat Island (UHI) effect, with minor benefits for temperature and humidity accuracy. The adoption of LES turbulence scheme enhances the complex urban dynamics, but results in overestimation of nocturnal cooling and wind speeds. Seasonal Anthropogenic Heat Flux variability reduces warm nocturnal biases, providing a more realistic simulation of urban weather. These results highlight the potential of hectometric modelling, but identify limitations in turbulence parameterization and soil-atmosphere interaction.