Scholarlink

<p>This study presents a case study investigating the differences between local and non-local effects in aerosol transport during daytime and nighttime periods using observational data from a summer field campaign in the Southeastern Inner Mongolia Grassland, China. Skewness statistics and quadrant analysis were used for the first time in the terrestrial boundary layer which also employed to characterize the spatial distribution patterns of aerosols under varying boundary layer conditions. Aerosol transport primarily manifested non-local advection effects during daytime and nighttime periods. And for nighttime period, local and non-local effects were both observed with diminished mechanical turbulence and thermal turbulence and have little impact on aerosol number concentration. The elevated nocturnal number concentrations, peaking at ~ 1500&#xa0;cm⁻³, were linked to non-local advection mixed by wind shear-induced mechanical turbulence, further supported by size-resolved data showing a sharp increase in coarse particles (~ 30&#xa0;µg cm⁻³) consistent with regional inflow. This research addresses knowledge gaps regarding the coupled effects of non-local processes and turbulent activities on aerosol vertical transport in complex boundary layers, providing insights into air pollution formation and diffusion mechanisms.</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

Observational Study of Local and Non-local Effects on Aerosols Vertical Distribution in the Boundary Layers

  • 期刊论文

  • 发表日期：

    2025年9月30日

查看全文
  • Haijiong Sun,
  • Lin Wang,
  • Hongrong Shi,
  • Liang Ran,
  • Jinqiang Zhang,
  • Zhixuan Bai,
  • Bai Liu,
  • Xiaoqiong Zhen,
  • Xuehua Fan,
  • Hongbin Chen

摘要

This study presents a case study investigating the differences between local and non-local effects in aerosol transport during daytime and nighttime periods using observational data from a summer field campaign in the Southeastern Inner Mongolia Grassland, China. Skewness statistics and quadrant analysis were used for the first time in the terrestrial boundary layer which also employed to characterize the spatial distribution patterns of aerosols under varying boundary layer conditions. Aerosol transport primarily manifested non-local advection effects during daytime and nighttime periods. And for nighttime period, local and non-local effects were both observed with diminished mechanical turbulence and thermal turbulence and have little impact on aerosol number concentration. The elevated nocturnal number concentrations, peaking at ~ 1500 cm⁻³, were linked to non-local advection mixed by wind shear-induced mechanical turbulence, further supported by size-resolved data showing a sharp increase in coarse particles (~ 30 µg cm⁻³) consistent with regional inflow. This research addresses knowledge gaps regarding the coupled effects of non-local processes and turbulent activities on aerosol vertical transport in complex boundary layers, providing insights into air pollution formation and diffusion mechanisms.