内蒙古典型草原2010~2021年黑碳气溶胶浓度变化及影响因素分析

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Abstract In order to provide a scientific basis for the prevention and control of atmospheric black carbon pollution, the temporal variations of the black carbon aerosol concentration and the relationships between the black carbon aerosol concentration and the meteorological elements are analyzed by utilizing the black carbon aerosol concentration observation data of the Atmospheric Composition Observatory of Xilinhot National Climate Observatory in Inner Mongolia from 2010~2021. The results showed that the black carbon aerosol concentration increases and is highest in the south-westerly wind direction in different seasons and wind speeds, while it is almost constant or even decreases slightly and is lowest in the northeasterly wind direction. The overall daily variation of black carbon aerosol concentration shows the characteristic of "single-peak" variation in all seasons, with the peak in winter occurring later than the other three seasons and the trough in all four seasons occurring at the same time. In the past 10 years, due to the change of energy structure and the effectiveness of energy-saving and emission-reduction measures, the black carbon aerosol concentration at the observation sites showed a significant decreasing trend, and its changes were highly significantly negatively correlated with temperature and precipitation, and highly significantly positively correlated with relative humidity.. The results show that the black carbon aerosol concentration increases and is highest in the south-westerly wind direction in different seasons and wind speeds, while it is almost constant or even decreases slightly and is lowest in the northeasterly wind direction. The overall daily variation of black carbon aerosol concentration shows the characteristic of "single-peak" variation in all seasons, with the peak in winter occurring later than the other three seasons and the trough in all four seasons occurring at the same time. In the past 10years, due to the change of energy structure and the effectiveness of energy-saving and emission-reduction measures, the black carbon aerosol concentration at the observation sites showed a significant decreasing trend, and its changes were highly significantly negatively correlated with temperature and precipitation, and highly significantly positively correlated with relative humidity.

Key words： black carbon aerosol semi-arid zone typical grassland temporal dynamics influencing factors

Received: 24 May 2023

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X513

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	WANG Hui-qing
	PEI Hao
	SUN Yu

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WANG Hui-qing,PEI Hao,SUN Yu. Analysis of black carbon aerosol concentration changes and influencing factors in typical steppe of Inner Mongolia from 2010 to 2021[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(1): 83-92.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I1/83

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