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Abstract <p>The operation of thermal power plants (TPP) is accompanied by the emission of various pollutants into the atmosphere, including nitrogen oxides. This paper presents the results of spectrometric measurements of the atmospheric NO<sub>2</sub> content carried out on circular routes around large urban TPPs of St. Petersburg. The spatial variability of tropospheric NO<sub>2</sub> content in the vicinity of a TPP is determined based on experimental data received by the DOAS (Differential Optical Absorption Spectroscopy) method and shows high values in the downwind side of stacks. The spatial distributions derived from the mobile DOAS measurements are confirmed by the results of numerical calculations of the NO<sub>2</sub> content field with the HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectories) model taking into account a priori information on the volume of NO<sub><i>x</i></sub> emissions from main urban TPPs. Approximate estimates of NO<sub><i>x</i></sub> emissions from two the largest TPPs in St. Petersburg from calculations of the total flux of NO<sub>2</sub> molecules through a loop-route DOAS measurements amount to ∼2–3 kt per year. These experimental data are important for determining the contribution of thermal power plants to anthropogenic atmospheric pollution.</p>

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Remote Spectrometric Measurements of Atmospheric Nitrogen Dioxide near Urban Thermal Power Plants

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • D. V. Ionov,
  • M. V. Makarova

摘要

Abstract

The operation of thermal power plants (TPP) is accompanied by the emission of various pollutants into the atmosphere, including nitrogen oxides. This paper presents the results of spectrometric measurements of the atmospheric NO2 content carried out on circular routes around large urban TPPs of St. Petersburg. The spatial variability of tropospheric NO2 content in the vicinity of a TPP is determined based on experimental data received by the DOAS (Differential Optical Absorption Spectroscopy) method and shows high values in the downwind side of stacks. The spatial distributions derived from the mobile DOAS measurements are confirmed by the results of numerical calculations of the NO2 content field with the HYSPLIT (HYbrid Single-Particle Lagrangian Integrated Trajectories) model taking into account a priori information on the volume of NOx emissions from main urban TPPs. Approximate estimates of NOx emissions from two the largest TPPs in St. Petersburg from calculations of the total flux of NO2 molecules through a loop-route DOAS measurements amount to ∼2–3 kt per year. These experimental data are important for determining the contribution of thermal power plants to anthropogenic atmospheric pollution.