HR: 1340h
AN: A53C-1370    [Abstracts]
TI: Air mass back trajectory analysis for air quality in Anmyeon Island, Korea
AU: Kim, Y
EM: sulla@kma.go.kr
AF: KMA/KGAWC, 1764-6, Seungeon-ri Anmyeon-eup,Taean-gun, Chungcheongnam-do, 357- 961, Korea, Republic of
AU: Kim, S
EM: sbkim1971@kma.go.kr
AF: KMA/KGAWC, 1764-6, Seungeon-ri Anmyeon-eup,Taean-gun, Chungcheongnam-do, 357- 961, Korea, Republic of
AU: Kim, J
EM: kimjs@kma.go.kr
AF: KMA/KGAWC, 1764-6, Seungeon-ri Anmyeon-eup,Taean-gun, Chungcheongnam-do, 357- 961, Korea, Republic of
AU: * Cho, C
EM: choch@kma.go.kr
AF: KMA/KGAWC, 1764-6, Seungeon-ri Anmyeon-eup,Taean-gun, Chungcheongnam-do, 357- 961, Korea, Republic of
AU: Kim, M
EM: kimms@kma.go.kr
AF: KMA/KGAWC, 1764-6, Seungeon-ri Anmyeon-eup,Taean-gun, Chungcheongnam-do, 357- 961, Korea, Republic of
AU: Lee, M
EM: meehye@korea.ac.kr
AB: Air mass back trajectory analysis was assimilated with data of greenhouse gases (CO₂, CH₄, CFCs), reactive gases(O₃, CO, NO_X and SO₂) and PM₁₀. The data continuously measured in real time at KGAWC from Jan 2006 to Jul 2007. KGAWC (Korea Global Atmosphere Watch Center) is one of regional stations of WMO/GAW and located in Anmyeon Island, the western coast of Korea peninsula (32° 32'N, 126°19'E). Usually we can see the backward trajectory to know how to inflow from the source of atmospheric gases. In our study, we categorized inflow direction focused on Anmyeon Island. New attempt was made to continuous tracking air mass with measurement time series. Data of back trajectories was achieved from HYSPLIT web site. The directions of trajectories were separated to five areas centered at the station; North China including Mongol, South China, North Korea around Sea of Okhotsk, South Korea and the Pacific, northern east sector include Seoul metropolitan in domestic (local area). The trajectories were presented in five different colors by the areas with 120 hours backward in Y-axis and 3-hour interval time series in X-axis. With the trajectories, the measurements results could classify to Asian dust, long-range transported air pollution and clean air cases. The peaks of PM₁₀, CO, SO₂ were related to the cold front from China. Other peaks were due to inflow from the Metropolitan and industrial area in Korea. Because the life time of NO_X is short compared with other gases, NO_X is not affected from China. However, high concentration of NO_X was shown with inflow from the Metropolitan and industrial area in Korea. Surface O₃ was simultaneously decreased to the increase of NO_X concentration by the reaction NO + O₃->NO₂ + O₂. The peaks of CO₂, CH₄, CFC-11 were observed with NO_X peak. Low peaks of SO₂ from the Metropolitan inflow are due to the Regulation of air pollution in Korea.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting