Effects of Meteorological Conditions on PM2.5 Concentrations in Nagasaki, Japan

International Journal of Environmental Research and Public Health

Jianhua Wang²  Susumu Ogawa¹ 

[1] Space Engineering and Planning Laboratory, Graduate school of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan; E-Mail

关键词: PM_2.5;    meteorological variables;    correlation analysis;    long-range transport;   

DOI  :  10.3390/ijerph120809089

来源: mdpi

【 摘 要 】

The fine particulate matter (PM_2.5) problem has attracted much scientific and public attention, due to its effects on visibility, human health, and global climate. There are three factors that have important effect on PM_2.5 mass concentration: domestic pollutant emission sources, external sources outside of the country, and the meteorological conditions. Nagasaki is a coastal prefecture located at the westernmost part of Japan, which is an ideal location to study pollutants from long range transport and correlation between PM_2.5 and meteorological conditions. In this paper, PM_2.5 concentration data and meteorological data were obtained during 1 January 2013~31 December 2013. The spatial distribution depicts that the western part of the study area has the most serious PM_2.5 pollution. The correlation analysis results between PM_2.5 concentration and meteorological data showed that temperature had a negative, and precipitation had a positive, correlation with PM_2.5. There was a threshold in the correlations between humidity and wind speed and PM_2.5. The correlation was positive or negative depending on the meteorological variable values, if these were lower or higher than the threshold. From the relationship with wind direction, it can be depicted that the west wind might bring the most pollutants to Nagasaki.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.