Studies of the Dispersed Composition of Atmospheric Aerosol and Its Relationship with Small Gas Impurities in the Near-Water Layer of Lake Baikal Based on the Results of Ship Measurements in the Summer of 2020

Galina Zhamsueva,Vadim Tcydypov,Ayuna Dementeva,Alexander Zayakhanov,Tumen Balzhanov,Tamara Khodzher

doi:10.3390/atmos13010139

Galina Zhamsueva, Vadim Tcydypov + Show 4 more

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https://doi.org/10.3390/atmos13010139

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Abstract

The atmosphere over Lake Baikal covers a vast area (31,500 square meters) and has more significant differences in the composition and variability of gaseous and aerosol components in atmospheric air than in coastal continental areas and is still a poorly studied object. In recent years, the anthropogenic impact on the ecosystem of Lake Baikal has been increasing due to the development of industry in the region, the expansion of tourist infrastructure and recreational areas of the coastal zone of the lake. In addition, one of the significant sources of atmospheric pollution in the Baikal region is the emissions of smoke aerosol and trace gases from forest fires, the number of which is increasing in the region. This article presents the results of experimental studies of the dispersed composition of aerosols and gas impurities, such as ozone, sulfur dioxide, and nitrogen oxides during route ship measurements in the water area of Lake Baikal in the summer of 2020.

Highlights

The increase in total atmospheric pollution and the associated global climate changes have caused increased interest in the physicochemical properties and structure of atmospheric aerosols [1]
The processes of propagation and removal of aerosols from the atmosphere are determined by both meteorological factors and the properties of the aerosol particles themselves
During the propagation or removal of particles from the atmosphere, the mass and composition of the latter are transformed as a result of coagulation and condensation growth, as well as heterogeneous reactions

Summary

Introduction

The increase in total atmospheric pollution and the associated global climate changes have caused increased interest in the physicochemical properties and structure of atmospheric aerosols [1]. The spatial structure of aerosols changes noticeably over time as a result of the processes of generation, removal from the atmosphere, and the propagation of aerosol particles in it [3]. The processes of propagation and removal of aerosols from the atmosphere are determined by both meteorological (geophysical) factors and the properties of the aerosol particles themselves. During the propagation or removal of particles from the atmosphere, the mass and composition of the latter are transformed as a result of coagulation and condensation growth, as well as heterogeneous reactions. Coagulation, condensation, and heterogeneous reactions form a spectrum of particle sizes, determining the type of particle size distribution function [7,8]

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