Abstract
Forest ecosystems play an important role in the process of removing trace gases from the atmosphere. The purpose of this work is the experimental study of the flux and rate of the dry deposition of ozone on different types of vegetation in the Baikal region. Based on the eddy covariance method and the flux gradient methods (including the aerodynamic gradient method (AGM), the modified Bowen method (MBR) and modified gradient method (MGM)) and with experimental data, the quantitative estimates of the fluxes and dry deposition velocity of ozone on the underlying surface were obtained for different environments (grasslands, forest). The average values of the dry deposition velocity of ozone (Vd) were equal to 0.37 cm/s at night (0–3 h) and 0.91 cm/s during daytime hours (12–18 h). The ozone flux (F) was 0.24 μg m–2 s–1 at night and 0.72 μg m–2 s–1 in the afternoon. The quantitative estimates of Vd and F on vegetation and in the forest show a higher absorptive capacity of forests compared to soil vegetation.
Highlights
In recent years, the number of studies related to the influence of tropospheric ozone (O3 ) on the environment, both on a global and regional scale, has increased significantly
The purpose of this study is to present new results of the quantitative estimates of the fluxes of
A method of gradient measurements regarding the concentration of ozone and atmospheric dynamic characteristics with the help of meteorological masts was used to study the effect of the thermal stratification of the atmosphere on O3, and to study the characteristics of the exchange processes of trace gases between the atmosphere and the underlying surface
Summary
The number of studies related to the influence of tropospheric ozone (O3 ) on the environment, both on a global and regional scale, has increased significantly. The increase of the concentration of nitrogen oxides, sulfur dioxide, and other trace gases leads to an increase of O3 at the ground level of the atmosphere due to photochemical reactions. Because these substances play an important role in changing the Earth's climate and affect living organisms and objects of the natural environment, observations of the O3 and components of the ozone cycle are included in the program of a special observation system, the Global Environment Monitoring System (GEMS) [1,2,3]. Monitoring the condition and quality of the natural environment of Lake Baikal is an important task
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