황해 방사성 핵종: 입력과 재분포 OTHER

Title
황해 방사성 핵종: 입력과 재분포
Alternative Title
Artificial radionuclides in the Yellow Sea
Author(s)
홍기훈; 정창수; 이상한; 김석현; 마크 바스카란; 이현미; 김영일; 양동범; 김찬규
KIOST Author(s)
Chung, Chang Soo(정창수)Kim, Suk Hyun(김석현)KIM, YOUNG IL(김영일)
Publication Year
2006
Abstract
The Yellow Sea is one of the marginal seas of the Northwest Pacific recieving large amounts of material from the continent via rivers and atmosphere. In order to understand the sources and present levels of key artificial radionuclides (90Sr, 137C and 239+240Pu) in the Yellow Sea, the processes affecting their distribution in the water column and their burial in the sea floor, concentrations of these radionculdies were determined in seawater and bottom sediment samples collected from the Yellow Sea during 1994 to 2000, and from the East China Sea and the tropical Northwest Pacific during 1993 and 1994. The atmospheric and riverine inputs of these readionuclides were also assessed at the mid-eastern coast of the Yellow Sea. The atmospheric deposition of these radionuclides appears to be dominated by the long–range tranport from the arid regions of the Asian continent with the highest values during the spring Asian dust storms and lowest in the summer wet monsoon period. The dry atmospheric deposition flux appeared to be particularly important for 239+240Pu. Riverine fluxes of these radionuclides dominated the total input due to the shear size of the riverine water and sediment fluxes into the sea. The river input was seeen in their distribution in the surface of the sea, particularly for 90Sr in winter. In summer, the water column stratification segregates these radionuclides vertically, so they are depleted in the surface layer and enriched in the bottom layer. The half-removal rate for 90Sr and 137Cs was estimated to be 7 years. The levels of radionculides in the Yellow Sea were higer than in the adjacent seas, and significant amounts of them have been exported from the Yellow Sea to the adjacent seas.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4988
Bibliographic Citation
Radioactivity in the environmenet, v.8, no.0, pp.96 - 133, 2006
Type
Article
Language
English
Related Researcher
Research Interests

marine pollution management,marine biogeochemistry,marine environmental radioactivity,해양오염관리,해양물질순환,해양환경방사능

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