天津不同气团来向PM<sub>2.5</sub>中组分和污染源贡献的季节变化

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Abstract

PM_2.5 samples were collected simultaneously at an inland and coastal sites during four seasons in Tianjin, China. A three-way receptor model and HYSPLIT model were utilized to investigate the sources of PM_2.5 at two sites, and qualitatively determine the major air mass origins, and then the source directional apportionment (SDA) was applied to quantify source contributions from different directions to the ambient PM_2.5. The results showed that PM_2.5 concentration from Bohai Sea direction was relatively low (97.1μg/m³), but the air masses percentage was high (23.7%). While PM_2.5 concentration from Inner Mongolia direction was high compared with the Bohai direction,but the air masses percentage was low. In coastal site, the largest contributors to PM_2.5 were crustal dust from SSW for spring (12.8%), sulfate and SOC (secondary organic carbon) from SE for summer (9.8%), coal combustion from WSW for autumn (10.3%), sulfate and SOC from WNW for winter (12.1%). For inland site, the largest contributors to PM_2.5 during four seasons were crustal dust from SSW (14.5%), sulfate+SOC from S (south direction, 13.5%), vehicle exhaust form SSW(8.9%), sulfate and SOC from WNW respectively (9.5%).

Key words： Three-way factor analysis model SDA HYSPLIT PM_2.5

Received: 21 November 2017

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	Articles by authors
	SHI Xu-rong
	WEN Jie
	TIAN Ying-ze
	SHI Guo-liang
	ZHANG Yu-fen
	FENG Yin-chang

Cite this article:

SHI Xu-rong,WEN Jie,TIAN Ying-ze等. Seasonal patterns of PM_2.5 sources and chemical composition from different air mass directions in Tianjin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(7): 2406-2414.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I7/2406

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