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Abstract <p>Atmospheric aerosol deposition on the underlying surface in a forest area and over meadow vegetation on the southeastern coast of Lake Baikal have been studied. Based on the measurements of the height profiles of the number concentration of fine aerosol, it is shown that the aerosol concentration gradients over meadow vegetation are significantly higher than under the tree crown in the forest area and differ significantly. The concentration gradients of fine aerosol (FA) and submicron aerosol (SMA) particles under the tree crown in the forest vary within narrow ranges compared to those in the open country (meadow) and can be negative or positive (<i>dC</i>/<i>dh</i>). In experiments over meadow vegetation, the maximum concentration gradient was 180 (particles/cm<sup>3</sup>)/m for fine particles in the daytime and 4 (particles/cm<sup>3</sup>)/m for submicron aerosol in the morning. In the forest, the maximum is 110 (particles/cm<sup>3</sup>)/m for FA in the daytime and 1 (particle/cm<sup>3</sup>)/m for SMA particles. The low values of gradient under the tree canopy indicate that the tree crown has a significant effect on the deposition of aerosol particles in forest vegetation.</p>

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Modeling of Atmospheric Aerosol Deposition on Different Types of Underlying Surface (for the Coastal Zone of Lake Baikal As an Example)

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • G. S. Zhamsueva,
  • A. S. Zayahanov,
  • V. V. Tsydypov,
  • T. S. Bal’zhanov,
  • A. L. Dement’eva,
  • A. V. Starikov

摘要

Abstract

Atmospheric aerosol deposition on the underlying surface in a forest area and over meadow vegetation on the southeastern coast of Lake Baikal have been studied. Based on the measurements of the height profiles of the number concentration of fine aerosol, it is shown that the aerosol concentration gradients over meadow vegetation are significantly higher than under the tree crown in the forest area and differ significantly. The concentration gradients of fine aerosol (FA) and submicron aerosol (SMA) particles under the tree crown in the forest vary within narrow ranges compared to those in the open country (meadow) and can be negative or positive (dC/dh). In experiments over meadow vegetation, the maximum concentration gradient was 180 (particles/cm3)/m for fine particles in the daytime and 4 (particles/cm3)/m for submicron aerosol in the morning. In the forest, the maximum is 110 (particles/cm3)/m for FA in the daytime and 1 (particle/cm3)/m for SMA particles. The low values of gradient under the tree canopy indicate that the tree crown has a significant effect on the deposition of aerosol particles in forest vegetation.