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

Wang J, Ogawa S - Int J Environ Res Public Health (2015)

Bottom Line: The fine particulate matter (PM2.5) problem has attracted much scientific and public attention, due to its effects on visibility, human health, and global climate.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.

View Article: PubMed Central - PubMed

Affiliation: Space Engineering and Planning Laboratory, Graduate school of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan. jianhuagirl@gmail.com.

ABSTRACT
The fine particulate matter (PM2.5) 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 PM2.5 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 PM2.5 and meteorological conditions. In this paper, PM2.5 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 PM2.5 pollution. The correlation analysis results between PM2.5 concentration and meteorological data showed that temperature had a negative, and precipitation had a positive, correlation with PM2.5. There was a threshold in the correlations between humidity and wind speed and PM2.5. 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.

No MeSH data available.


Related in: MedlinePlus

The relationship between PM2.5 and wind direction in a year.
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ijerph-12-09089-f008: The relationship between PM2.5 and wind direction in a year.

Mentions: The wind direction is an important parameter affecting PM2.5 [21]. The wind from different directions transported different amount of pollutants. Figure 8 shows the AWP (Average Weighted PM2.5 by wind speed) for different wind directions for the four seasons. In spring, the west wind transported the most pollutants. In summer, the NNW wind, NW wind, SE wind, and W wind transported more pollutants than wind in other directions. In autumn, the ESE wind, SE wind, and W wind transported more pollutants than wind in any other directions. In winter, the ESE wind, N wind, SE wind, SSE wind, SW wind, and W wind transported more pollutants than wind in other directions. In every season, the west wind always transported more pollutants than wind in other directions. It can be concluded that the pollutants in Nagasaki are mainly from East Asia.


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

Wang J, Ogawa S - Int J Environ Res Public Health (2015)

The relationship between PM2.5 and wind direction in a year.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4555266&req=5

ijerph-12-09089-f008: The relationship between PM2.5 and wind direction in a year.
Mentions: The wind direction is an important parameter affecting PM2.5 [21]. The wind from different directions transported different amount of pollutants. Figure 8 shows the AWP (Average Weighted PM2.5 by wind speed) for different wind directions for the four seasons. In spring, the west wind transported the most pollutants. In summer, the NNW wind, NW wind, SE wind, and W wind transported more pollutants than wind in other directions. In autumn, the ESE wind, SE wind, and W wind transported more pollutants than wind in any other directions. In winter, the ESE wind, N wind, SE wind, SSE wind, SW wind, and W wind transported more pollutants than wind in other directions. In every season, the west wind always transported more pollutants than wind in other directions. It can be concluded that the pollutants in Nagasaki are mainly from East Asia.

Bottom Line: The fine particulate matter (PM2.5) problem has attracted much scientific and public attention, due to its effects on visibility, human health, and global climate.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.

View Article: PubMed Central - PubMed

Affiliation: Space Engineering and Planning Laboratory, Graduate school of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan. jianhuagirl@gmail.com.

ABSTRACT
The fine particulate matter (PM2.5) 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 PM2.5 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 PM2.5 and meteorological conditions. In this paper, PM2.5 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 PM2.5 pollution. The correlation analysis results between PM2.5 concentration and meteorological data showed that temperature had a negative, and precipitation had a positive, correlation with PM2.5. There was a threshold in the correlations between humidity and wind speed and PM2.5. 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.

No MeSH data available.


Related in: MedlinePlus