北京冬季重污染过程黑碳气溶胶的飞机观测

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Abstract A single particle black carbon photometer (SP2) on the King Air platform was used to carry out continuous observation on a pollution process in the winter of December 2016 in Beijing, and the change characteristics of the mass concentration, particle size distribution and mixing state of black carbon aerosols during the occurrence, development and dissipation of pollution were elaborated in detail. The results showed that the pollution process was mainly haze pollution with PM_2.5 pollution, with a maximum of 432μg/m³. The concentration of gaseous pollutants such as NO₂, SO₂ and CO has gone through three stages of pollution accumulation, providing a material basis for the ultimate explosive growth of PM_2.5. The static and stable atmospheric conditions provide the dynamic conditions for the explosive growth of PM_2.5. In the process of pollution development, BC aerosols accumulate and increase on the ground first, and then are transmitted to the upper air; in the removal process, the upper air is removed first, and the lower layer slowly decreases. In the process of pollution development, the concentration of black carbon aerosol in Beijing area increased first and then decreased, with an average concentration of 3.45μg/m³, and MMD in the range of 190~220nm. With the development of the pollution process, aerosols are rapidly aging. The BC aging ratio in PBL can increase from 27% to 51% in one day. The aging process makes the PM_2.5 mass concentration explosively increase. The vertical evolution of BC in the boundary layer during the pollution process leads to atmospheric heating rate, which is conducive to the maintenance and development of temperature inversion and aggravates the pollutant process.

Key words： aircraft measurement black carbon aerosol vertical distribution heating rate

Received: 08 April 2021

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X513

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	Articles by authors
	ZHAO De-long
	XIAO Wei
	YANG Yan
	SHENG Jiu-jiang
	ZHOU Wei
	LU Li
	LIU Jiang-le
	ZHANG Xiao-ling
	SHENG Ling-ling
	SONG Jing-jing
	HUANG Meng-yu
	HE Hui
	DING De-ping

Cite this article:

ZHAO De-long,XIAO Wei,YANG Yan等. Aircraft observation of black carbon aerosols during heavy pollution in winter in Beijing[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(12): 5539-5547.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I12/5539

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