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Characteristics of PM1.0, PM2.5, and PM10, and Their Relation to Black Carbon in Wuhan, Central China

by Wei Gong 1,2,3,†, Tianhao Zhang 1,*,†, Zhongmin Zhu 1,4, Yingying Ma 1, Xin Ma 1 and Wei Wang 1
1
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
2
Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China
3
Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy, Wuhan 430079, China
4
Huazhong University of Science and Technology Wuchang Branch, Wuhan 430064, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Robert W. Talbot
Atmosphere 2015, 6(9), 1377-1387; https://doi.org/10.3390/atmos6091377
Received: 12 August 2015 / Revised: 14 September 2015 / Accepted: 16 September 2015 / Published: 22 September 2015
Hourly average monitoring data for mass concentrations of PM1, PM2.5, PM10, and black carbon (BC) were measured in Wuhan from December 2013 to December 2014, which has a flourishing steel industry, to analyze the characteristics of PM and their relation to BC, using statistical methods. The results indicate that variations in the monthly average mass concentrations of PM have similar concave parabolic shapes, with the highest values occurring in January and the lowest values appearing in August or September. The correlation coefficient of the linear regression model between PM1 and PM2.5 is quite high, reaching 0.99. Furthermore, the proportion of PM1 contained within PM2.5 is roughly 90%, directly proving that ultrafine particles whose diameter less than 1 μm may be a primary component of PM2.5 in Wuhan. Additionally, better seasonal correlation between PM and BC occurs only in summer and autumn, due to multiple factors such as topography, temperature, and the atmosphere in winter and spring. Finally, analysis of the diurnal variation of PM and BC demonstrates that the traffic emissions during rush hour, exogenous pollutants, and the shallow PBLH with stagnant atmosphere, all contribute to the severe pollution of Wuhan in winter. View Full-Text
Keywords: PM1; PM2.5; PM10; black carbon; Wuhan PM1; PM2.5; PM10; black carbon; Wuhan
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Gong, W.; Zhang, T.; Zhu, Z.; Ma, Y.; Ma, X.; Wang, W. Characteristics of PM1.0, PM2.5, and PM10, and Their Relation to Black Carbon in Wuhan, Central China. Atmosphere 2015, 6, 1377-1387.

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