Effect of coal type on aerosol optical properties at Ulaanbaatar city

Authors

DOI:

https://doi.org/10.5564/pmas.v64i02.3651

Keywords:

atmospheric optical properties, aerosol optical thickness, Angstrom exponent, seasonal variation, Ulaanbaatar city

Abstract

In this study, seasonal characteristics of aerosol optical properties at Ulaanbaatar station of the international network of SKYNET are investigated using ground-based skyradiometer from the years extending from 2017 to 2023. The aerosol optical thickness (AOT) at 500nm wavelength and Angstrom exponent (AE) were determined in winter to evaluate the decrease in air pollution in Ulaanbaatar since implementing the government's decision to use coal briquettes for household heating. During the study period, the monthly mean AOT at 500nm varied throughout the year, with the maximum value of 0.178±0.004 obtained in winter due to households burning large amounts of biomass, and the highest AOT (0.183) was obtained in February. The mean AOT was 0.21 in the winter of 2017-2019, which decreased by 15 per cent to 0.18 in the winter of 2019-2023.

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Author Biographies

Narangarav Tumur-Uyal, Department of Geology and Geophysics, School of Arts and Sciences, National University of Mongolia, Ulaanbaatar, Mongolia

Laboratory of Atmospheric Optics, Graduate School, National University of Mongolia, Ulaanbaatar, Mongolia

Baatarchuluun Tsermaa, Department of Geology and Geophysics, School of Arts and Sciences, National University of Mongolia, Ulaanbaatar, Mongolia

Laboratory of Atmospheric Optics, Graduate School, National University of Mongolia, Ulaanbaatar, Mongolia

Tuvshinjargal Baldorj, Department of Astrophysics, Institute of Astronomy and Geophysics, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia

Laboratory of Atmospheric Optics, Graduate School, National University of Mongolia, Ulaanbaatar, Mongolia

Javzandolgor Bad, Department of Geology and Geophysics, School of Arts and Sciences, National University of Mongolia, Ulaanbaatar, Mongolia

Laboratory of Atmospheric Optics, Graduate School, National University of Mongolia, Ulaanbaatar, Mongolia

Daariimaa Badarch, Department of Geology and Geophysics, School of Arts and Sciences, National University of Mongolia, Ulaanbaatar, Mongolia

Laboratory of Atmospheric Optics, Graduate School, National University of Mongolia, Ulaanbaatar, Mongolia

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Published

2024-10-28

How to Cite

Tumur-Uyal, N., Tsermaa, B., Baldorj, T., Bad, J., & Badarch, D. (2024). Effect of coal type on aerosol optical properties at Ulaanbaatar city. Proceedings of the Mongolian Academy of Sciences, 64(02), 44–52. https://doi.org/10.5564/pmas.v64i02.3651

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