SS4.06 Speciation, Bioavailability, and Impacts of Atmospheric Trace Metals in Aquatic Systems
Date: Wednesday, June 12, 2002
Location: Poster Session - VCC
 
LeeCB, Seoul National University, Seoul, Republic Of Korea, cblee@plaza.snu.ac.kr
Choi, M, S, Korea Basic Science Institute, Taejeon, Republic Of Korea, rewchun@comp.kbsi.re.kr
Lee, D, S, Yonsei University, Seoul, Republic Of Korea, dslee@alchemy.yonsei.ac.kr
 
SIGNIFICANCE OF THE ATMOSPHERIC FLUX IN THE TRACE METAL BUDGET OF THE YELLOW SEA
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Atmospheric particles, sampled from the western coast of Korea from 1988 to 1993, were analyzed for 12 metals. Their chemical composition and temporal variation were characterized and the significance in the trace metal budget of the Yellow Sea evaluated. The metals showed different characteristics in seasonal variation and particle-size association according to their sources. Al, Fe, Ca, Co, Mn and Mg, stemming mostly from mineral dust, showed particularly high concentrations during spring yellow-sand storms, and were associated with coarse particles. Cu, Zn, Cd, originating mainly from anthropogenic activities, however, were associated mostly with fine particles and generally showed a summer-low, winter-high concentration pattern. Taking these seasonal variations into consideration, the atmospheric flux of these metals in the Yellow Sea is smaller compared to the results of previous studies by a factor of up to five. The atmospheric contribution of dissolved metals, calculated using the solubility of atmospheric metals in rainwater, proved more significant than fluvial inputs, far exceeding the fluvial inputs for Cd and Pb, but being somewhat similar for Cu in the magnitude of the two input pathways.