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Atmosphere 2016, 7(8), 96; doi:10.3390/atmos7080096

Characteristics of Ultrafine Particles and Their Relationships with Meteorological Factors and Trace Gases in Wuhan, Central China

1
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
2
College Information Science and Engineering, Wuchang Shouyi University, Wuhan 430064, China
3
Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China
4
School of Public Health, Wuhan University, 115# Donghu Road, Wuhan 430071, China
5
School of Information Management, Central China Normal University, Wuhan 430079, China
6
Land and Resources Technical Center of Guangdong Province, Guangzhou 510075, China
*
Author to whom correspondence should be addressed.
Academic Editor: Pasquale Avino
Received: 13 June 2016 / Revised: 13 July 2016 / Accepted: 18 July 2016 / Published: 23 July 2016
(This article belongs to the Special Issue Ultrafine Particles: Determination, Behavior and Human Health Effects)
View Full-Text   |   Download PDF [4627 KB, uploaded 23 July 2016]   |  

Abstract

Ultrafine particles with a diameter below 1 μm are strongly linked to traffic and industrial emissions, causing a growing global health concern. In order to reveal the characteristics of ultrafine particles in central China, which makes up the sparse research in industrial cities of a developing country, particle number concentrations (PNC) together with meteorological parameters and concentrations of trace gases were measured over one year in Wuhan. The number concentration of ultrafine particles peaked in winter and was the lowest in summer across the entire size range monitored. Further, particles with a diameter smaller than 30 nm increased dramatically in concentration with decreasing diameter. The monthly averaged number concentrations of particles discriminated in three size ranges formed a near- inverse parabolic distribution peaking in January. This trend is supported by a negative correlation between PNC and precipitation, temperature, and mixing layer height, which emphasizes the effect of these meteorological parameters on scouring, convection, and diffusion of particles. However, since wind not only disperses particulate matter but also brings in exogenous particles, wind speed plays an equivocal role in particle number concentrations. The diurnal analysis indicates that hourly measurements of trace gases concentrations could be used as a proxy for dense industrial activities and to reveal some complex chemical reactions. The results of this study offer reasonable estimations of particle impacts and provide references for policymaking of emission control in the industrial cities of developing countries. View Full-Text
Keywords: ultrafine particles; meteorological parameters; trace gases; industrial city; central China ultrafine particles; meteorological parameters; trace gases; industrial city; central China
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Zhang, T.; Zhu, Z.; Gong, W.; Xiang, H.; Li, Y.; Cui, Z. Characteristics of Ultrafine Particles and Their Relationships with Meteorological Factors and Trace Gases in Wuhan, Central China. Atmosphere 2016, 7, 96.

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