Dr. Irina Y. Ivanova Profile

Dr. Irina Y. Ivanova

at Melentiev Energy Systems Institute SB RAS

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Proceedings Article | 13 December 2018 Paper

Nitrogen oxides in the atmosphere of coastal areas of Lake Baikal: sources and possible impact on the ecosystem of the lake

Vladimir Obolkin, Elena Maysyuk, Irina Yu. Ivanova, Tamara Khodzher

Proceedings Volume 10833, 108336P (2018) https://doi.org/10.1117/12.2505770

KEYWORDS: Nitrogen, Oxides, Ecosystems, Gases, Magnesium, Analytical research, Statistical analysis, NOx, Pollution, Wind energy

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The research is focused on the distribution of nitrogen oxide concentrations in the atmosphere above Lake Baikal, the determination of the largest sources of emission, and a quantitative assessment of their possible contribution to the content of nitrates in the near shore waters of the lake. The paper presents the results of measurements of nitrogen oxide concentrations above the water area of the Baikal in the summer. In general, low background concentrations of nitrogen oxides prevailed, the excess was recorded in the northern part of the lake. An analysis and a calculation of emissions into the atmosphere from power facilities in the near-shore areas of the lake were carried out. In the northern part of Lake Baikal, the central coal-fired boiler plant in the town of Severobaikalsk could become a source of nitrogen oxides emission. The plume from the boiler was visually observed above the near shore waters. This boiler plant is the largest energy facility and the main source of emissions of pollutants into the atmosphere. Deposition of nitrogen oxides from such plumes can temporarily and locally cause an increase in nitrate concentrations in the near shore waters by 3-5% per day. In turn, the high content of nitrates in the water contributes to the growth of biomass of some algae species and thus affects the entire ecosystem of the lake. Water transport can also be a significant source of nitrogen oxides above the water area of the lake, but its contribution to the pollution of Lake Baikal is not sufficiently investigated.

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