TY - JOUR
T1 - Seasonal variation in atmospheric aerosols concentration covering Northern Kyushu, Japan and Seoul, Korea
AU - Wakamatsu, Shinji
AU - Utsunomiya, Akira
AU - Han, Jin Suk
AU - Mori, Atsuko
AU - Uno, Itsushi
AU - Uehara, Kiyoshi
N1 - Funding Information:
Acknowledgements-This work was partially supported by Japan International Cooperation Agency (JICA). The authors acknowledge Mr T. Yamashita and Mr Y. Ueno of Nagasaki prefecture and the team members of Nagasaki and Fukuoka prefecture for the assistance in sampling and analysis.
PY - 1996/7
Y1 - 1996/7
N2 - Atmospheric aerosols were collected from October 1990 to February 1992 in northern Kyushu (Tsushima and Ogori), Japan and Seoul, Korea, simultaneously using identical sampling system and chemical analysis methods. Observed data were analyzed with meteorological data to clarify the seasonal variations in aerosol concentration and composition. Dominant ion components of aerosol were SO42- in anion and NH4+ in cation. The concentrations of ion components were higher in winter than those in summer. Equivalent concentration ratio of particulate nitrate and sulfate (NO3-/SO42-) showed high value in Ogori having a peak in winter season. Equivalent concentration ratio of Ca2+ and sulfate (Ca2+/SO42-) is highest in Seoul and shows no seasonal variation. On the contrary, Tsushima and Ogori showed low value in summer season. In summer, this area is affected by the atmospheric high-pressure system which developed at the southern Kyushu sea area and southerly monsoon wind predominate. As the result of this, supply of Ca2+ from soil should be diminished in summer. Equivalent concentration ratio of particulate Cl- and Na+ (Cl-/Na+) in August was half compared with the ratio observed in February. Episode analysis of June 1991 and February 1992 indicated the transportation of pollutants from the outside of Japan. Air masses from the Chinese continent have been concluded to bring the greatest amount of anthropogenic pollutants to Korea and Japan.
AB - Atmospheric aerosols were collected from October 1990 to February 1992 in northern Kyushu (Tsushima and Ogori), Japan and Seoul, Korea, simultaneously using identical sampling system and chemical analysis methods. Observed data were analyzed with meteorological data to clarify the seasonal variations in aerosol concentration and composition. Dominant ion components of aerosol were SO42- in anion and NH4+ in cation. The concentrations of ion components were higher in winter than those in summer. Equivalent concentration ratio of particulate nitrate and sulfate (NO3-/SO42-) showed high value in Ogori having a peak in winter season. Equivalent concentration ratio of Ca2+ and sulfate (Ca2+/SO42-) is highest in Seoul and shows no seasonal variation. On the contrary, Tsushima and Ogori showed low value in summer season. In summer, this area is affected by the atmospheric high-pressure system which developed at the southern Kyushu sea area and southerly monsoon wind predominate. As the result of this, supply of Ca2+ from soil should be diminished in summer. Equivalent concentration ratio of particulate Cl- and Na+ (Cl-/Na+) in August was half compared with the ratio observed in February. Episode analysis of June 1991 and February 1992 indicated the transportation of pollutants from the outside of Japan. Air masses from the Chinese continent have been concluded to bring the greatest amount of anthropogenic pollutants to Korea and Japan.
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U2 - 10.1016/1352-2310(95)00421-1
DO - 10.1016/1352-2310(95)00421-1
M3 - Article
AN - SCOPUS:0030453112
SN - 1352-2310
VL - 30
SP - 2343
EP - 2354
JO - Atmospheric Environment
JF - Atmospheric Environment
IS - 13
ER -