Numerical simulations of the effects of regional topography on haze pollution in Beijing

Abstract In addition to weather conditions and pollutant emissions, the degree to which topography influences the occurrence and development of haze pollution in downtown Beijing and the mechanisms that may be involved remain open questions. A series of atmospheric chemistry simulations are executed...

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Autores principales:	Ziyin Zhang, Xiangde Xu, Lin Qiao, Daoyi Gong, Seong-Joong Kim, Yinjun Wang, Rui Mao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/aa0ec57adb7348118f3de22c048ef806
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spelling	oai:doaj.org-article:aa0ec57adb7348118f3de22c048ef8062021-12-02T15:09:08ZNumerical simulations of the effects of regional topography on haze pollution in Beijing10.1038/s41598-018-23880-82045-2322https://doaj.org/article/aa0ec57adb7348118f3de22c048ef8062018-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-23880-8https://doaj.org/toc/2045-2322Abstract In addition to weather conditions and pollutant emissions, the degree to which topography influences the occurrence and development of haze pollution in downtown Beijing and the mechanisms that may be involved remain open questions. A series of atmospheric chemistry simulations are executed by using the online-coupled Weather Research and Forecasting with Chemistry (WRF-Chem) model for November-December 2015 with different hypothetical topographic height scenarios. The simulation results show that topography exerts an important influence on haze pollution in downtown Beijing, particularly the typical development of haze pollution. A possible mechanism that underlies the response of haze pollution to topography is that the mountains that surround Beijing tend to produce anomalous southerly winds, high relative humidity, low boundary layer heights, and sinking motion over most of Beijing. These conditions favor the formation and development of haze pollution in downtown Beijing. Furthermore, the reduction percentage in PM2.5 concentrations due to reduced terrain height in the southerly wind (S) mode is almost three times larger than that in the northerly wind (N) mode. In the context of the regional topography, the simple S and N modes represent useful indicators for haze prediction in Beijing to some extent, especially over medium to long time scales.Ziyin ZhangXiangde XuLin QiaoDaoyi GongSeong-Joong KimYinjun WangRui MaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-11 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ziyin Zhang Xiangde Xu Lin Qiao Daoyi Gong Seong-Joong Kim Yinjun Wang Rui Mao Numerical simulations of the effects of regional topography on haze pollution in Beijing
description	Abstract In addition to weather conditions and pollutant emissions, the degree to which topography influences the occurrence and development of haze pollution in downtown Beijing and the mechanisms that may be involved remain open questions. A series of atmospheric chemistry simulations are executed by using the online-coupled Weather Research and Forecasting with Chemistry (WRF-Chem) model for November-December 2015 with different hypothetical topographic height scenarios. The simulation results show that topography exerts an important influence on haze pollution in downtown Beijing, particularly the typical development of haze pollution. A possible mechanism that underlies the response of haze pollution to topography is that the mountains that surround Beijing tend to produce anomalous southerly winds, high relative humidity, low boundary layer heights, and sinking motion over most of Beijing. These conditions favor the formation and development of haze pollution in downtown Beijing. Furthermore, the reduction percentage in PM2.5 concentrations due to reduced terrain height in the southerly wind (S) mode is almost three times larger than that in the northerly wind (N) mode. In the context of the regional topography, the simple S and N modes represent useful indicators for haze prediction in Beijing to some extent, especially over medium to long time scales.
format	article
author	Ziyin Zhang Xiangde Xu Lin Qiao Daoyi Gong Seong-Joong Kim Yinjun Wang Rui Mao
author_facet	Ziyin Zhang Xiangde Xu Lin Qiao Daoyi Gong Seong-Joong Kim Yinjun Wang Rui Mao
author_sort	Ziyin Zhang
title	Numerical simulations of the effects of regional topography on haze pollution in Beijing
title_short	Numerical simulations of the effects of regional topography on haze pollution in Beijing
title_full	Numerical simulations of the effects of regional topography on haze pollution in Beijing
title_fullStr	Numerical simulations of the effects of regional topography on haze pollution in Beijing
title_full_unstemmed	Numerical simulations of the effects of regional topography on haze pollution in Beijing
title_sort	numerical simulations of the effects of regional topography on haze pollution in beijing
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/aa0ec57adb7348118f3de22c048ef806
work_keys_str_mv	AT ziyinzhang numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT xiangdexu numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT linqiao numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT daoyigong numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT seongjoongkim numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT yinjunwang numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing AT ruimao numericalsimulationsoftheeffectsofregionaltopographyonhazepollutioninbeijing
_version_	1718387894093086720

Numerical simulations of the effects of regional topography on haze pollution in Beijing

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