华北南部冬季大气亚微米颗粒物数浓度变化

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Abstract There was a period of heavy pollution at North China Plain in January 2018 characterized by long duration, wide range of influence and high particle number concentration. To obtain its submicron particle number size distribution during this period, a Scanning Mobility Particle Sizer (SMPS) was deployed for a continuously monitoring at a typical suburban site in the south edge of this area. The results indicated that average mass concentration of PM_2.5 was 141.32μg/m³. Particle size distribution was mainly concentrated on the ultrafine size range (78.9%) of the Nucleation mode and Atiken mode, showing a decreasing unimodal distribution, and average particle number concentration was 83174cm^-3. During the heavy pollution period, particle number concentration of Nucleation mode was obviously increased, accompanied by high relative humidity (90.8±4.5)%, low wind speed (1.5±0.4) m/s and low concentration of O₃ (15.8±8.3) μg/m³ conversely. The clustered 48h backward trajectories showed that air masses of observation site were mainly affected by the transportation of Hubei Province, Shaanxi Province and Shanxi Province. While the potential source regions were located at the local site and the north of the observation site based on potential source contribution function and concentration-weighted trajectory analysis.

Key words： the south edge of North China Plain suburban site number concentration heavy pollution source region

Received: 10 April 2019

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X513

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	Articles by authors
	ZHENG Shu-rui
	KONG Shao-fei
	YAN Qin
	WU Jian
	ZHENG Huang
	CHENG Yi
	YANG Guo-wei
	WU Fang-qi
	NIU Zhen-zhen
	ZENG Xin
	LI Fan
	ZHENG Ming-ming
	CHEN Nan
	XU Ke
	YAN Ying-ying
	QI Shi-hua

Cite this article:

ZHENG Shu-rui,KONG Shao-fei,YAN Qin等. Number concentration of submicron particles during winter at a suburban site of the south edge of North China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4511-4520.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4511

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