HR: 0800h
AN: A51C-0794    [Abstracts]
TI: Atmospheric Deposition of Nitrogen and Sulfur to Lake Paldang in Korea
AU: * Ghim, Y
EM: ysghim@kist.re.kr
AF: Korea Institute of Science and Technology (KIST), 39-1, Hawolgok-dong, Seongbuk-gu, Seoul, 136-791 Korea, Republic of
AU: Kim, J
EM: jykim@kist.re.kr
AF: Korea Institute of Science and Technology (KIST), 39-1, Hawolgok-dong, Seongbuk-gu, Seoul, 136-791 Korea, Republic of
AU: Jin, H
EM: hcjin@kist.re.kr
AF: Korea Institute of Science and Technology (KIST), 39-1, Hawolgok-dong, Seongbuk-gu, Seoul, 136-791 Korea, Republic of
AB: Lake Paldang, formed by a dam located on the Han River, is a main resource of drinking water for 20 million people in the greater Seoul area. The lake is surrounded by forests and farmland, but on the downwind side of prevailing westerlies from Seoul. It is suspected that the lake would have been affected by various pollutants from Seoul. In the present work, atmospheric deposition of nitrogen and sulfur was estimated by both measurement on the spot of Lake Paldang and prediction over the watershed. Wet and dry depositions were separately measured with wet-only and dry-only samplers, respectively since May 2002. The dry deposition sampler was composed of three pans filled with pure water. An average of concentration increase during the sampling period was considered as the input by deposition. Dry deposition was measured both routinely and intensively along with atmospheric concentrations. Wet deposition was measured either daily or event basis when precipitation occurred. Only dry deposition was predicted by season over the watershed of Lake Paldang with grid spacing of 12 km x 12 km. Models-3/Community Multiscale Air Quality with a updated aerosol module was used for air quality modeling. By assuming the same amount of wet deposition measured at Lake Paldang over the watershed, the contribution of atmospheric nitrogen to the total nitrogen load to Lake Paldang was estimated.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0322 Constituent sources and sinks
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting