|
KMID : 1024520120210020217
|
|
Journal of the Environmental Sciences
2012 Volume.21 No. 2 p.217 ~ p.231
|
|
|
Impact of Yellow Dust Transport from Gobi Desert on Fractional Ratio and Correlations of Temporal PM10, PM2.5, PM1 at Gangneung City in Fall
|
|
Lee Mi-Sook
Chung Jin-Do
|
|
|
Abstract
|
|
|
Hourly concentrations of PM 1 , PM 2.5 and PM 10 , were investigated at Gangneung city in the Korean east coast on 0000LST October 26~1800LST October 29, 2003. Before the intrusion of Yellow dust from Gobi Desert, PM 10 (PM 2.5 , PM 1 ) concentration was generally low, more or less than 20 (10, 5) �� g/m 3 , and higher PM concentration was found at 0900LST at the beginning time of office hour and their maximum ones at 1700LST around its ending time. As correlation coefficient of PM 10 and PM 2.5 (PM 2.5 and PM 1 , and PM 10 and PM 1 ) was very high with 0.90(0.99, 0.84), and fractional ratios of (PM 10 -PM 2.5 )/PM 2.5 ((PM 2.5 -PM 1 )/PM 1 ) were 1.37~3.39(0.23~0.54), respectively. It implied that local PM 10 concentration could be greatly affected by particulate matters of sizes larger than 2.5 �� m, and PM 2.5 concentration could be by particulate matters of sizes smaller than 2.5 �� m. During the dust intrusion, maximum concentration of PM 10 (PM 2.5 , PM 1 ) reached 154.57(93.19, 76.05) �� g/m 3 with 3.8(3.4, 14.1) times higher concentration than before the dust intrusion. As correlation coefficient of PM 10 and PM 2.5 (vice verse, PM 2.5 , PM 1 ) was almost perfect high with 0.98(1.00, 0.97) and fractional ratios of (PM 10 -PM 2.5 )/PM 2.5 ((PM 2.5 -PM 1 )/PM 1 ) were 0.48~1.25(0.16~0.37), local PM 10 concentration could be major affected by particulates smaller than both 2.5 �� m and 1 �� m (fine particulate), opposite to ones before the dust intrusion. After the ending of dust intrusion, as its coefficient of 0.23(0.81, - 0.36) was very low, except the case of PM 2.5 and PM 1 and (PM 10 -PM 2.5 )/PM 2.5 ((PM 2.5 -PM 1 )/PM 1 ) were 1.13~1.91(0.29~1.90), concentrations of coarse particulates larger than 2.5 �� m greatly contributed to PM 10 concentration, again. For a whole period, as the correlation coefficients of PM 10 , PM 2.5 , PM 1
were very high with 0.94, 1.00 and 0.92, reliable regression equations among PM concentrations were suggested.
|
|
|
KEYWORD
|
|
|
Gobi Desert, PM 10 , PM 2.5 , PM 1 , Yellow dust, Correlation coefficient, Fractional ratio, Regression equation
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|