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Title:

Characteristic of Fine Particulate Matter in Numbers at Urban Traffic Intersection in Hong Kong

Accession Number:

01551639

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Fine particulate matter at urban intersection is originated from a variety of sources and influenced by plenty of meteorological conditions. The various behavior of it is dependent on many factors. The goal of this study was to identify the originality and influencing factors on fine particulate matter at urban traffic intersection. The experiment was carried out in various seasons in Hong Kong and the number concentrations of fine particles larger than 0.3µm were collected. Based on the measurements database, correlations between the number concentration of particles in different sizes, traffic volume and meteorological conditions such as temperature, humidity and wind speed were analyzed using the principal component analysis (PCA) method. The results indicate that the number concentration of particles in the range of 0.5-4.99µm has a strong positive relation with traffic volume, especially diesel vehicles, implying that particles within this range are mainly emitted by diesel vehicles. PCA analyses also reveal that the number concentration of particles above 5µm negatively relate to wind speed, which agrees with results of cross-correlation analysis and the corresponding scatter plots. It can be inferred that particles in this size range are predominantly influenced by the wind factor. These findings are useful and significant for decision-making for reducing PM2.5 in meso-to mega-cities

Supplemental Notes:

This paper was sponsored by TRB committee ADC20 Transportation and Air Quality. Alternate title: Characteristics of Fine Particulate Matter in Number Concentrations at Urban Traffic Intersection in Hong Kong

Monograph Accession #:

01550057

Report/Paper Numbers:

15-1752

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Hong-di, He
Wei-zhen, Lu
Li-yun, Dong

Pagination:

14p

Publication Date:

2015

Conference:

Transportation Research Board 94th Annual Meeting

Location: Washington DC, United States
Date: 2015-1-11 to 2015-1-15
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References; Tables

Uncontrolled Terms:

Principal component analysis

Geographic Terms:

Hong Kong (China)

Subject Areas:

Environment; Highways; I15: Environment

Source Data:

Transportation Research Board Annual Meeting 2015 Paper #15-1752

Files:

TRIS, TRB, ATRI

Created Date:

Dec 30 2014 12:38PM