Accumulation of anthropogenic and natural radionuclides in bottom sediments of the Northwest Pacific Ocean SCIE SCOPUS

Cited 35 time in WEB OF SCIENCE Cited 0 time in Scopus
Title
Accumulation of anthropogenic and natural radionuclides in bottom sediments of the Northwest Pacific Ocean
Author(s)
Moon, DS; Hong, GH; Kim, YI; Baskaran, M; Chung, CS; Kim, SH; Lee, HJ; Lee, SH; Povinec, PP
KIOST Author(s)
KIM, YOUNG-IL(김영일)Chung, Chang Soo(정창수)Kim, Suk Hyun(김석현)Lee, Hee Jun(이희준)
Publication Year
2003
Abstract
Activities of anthropogenic radionuclides in bottom sediments of the Northwest-Central and West Caroline basins of the Northwest Pacific Ocean are reported. Down-core distributions of natural radionuclides were also investigated in order to elucidate the sedimentation processes of anthropogenic radionuclides in the seafloor. In the Northwest-Central Basin, the inventories of Pu239 + 240 and Am-241 decrease from south to north while the opposite trend is observed for Cs-137 and Sr-90. This latitudinal gradient in the inventories of artificial radionuclides reflects higher fluxes of Pu239 + 240 and Am-241 near the weapons test sites and transport of Cs-137 and Sr-90 over longer distances, as well as the regional differences in sediment-mixing and accumulation rates. In the West Caroline Basin, relatively low inventories of Pu239 + 240 and Am-241 were observed due to the topographic isolation of deep water. Sediment-mixing rates were calculated using down-core distributions of Pu239+240, Am-241, Cs-137 and Sr-90 based on two distinct models (continuous and constant) of tracer input and with a third model with pulsed input during the peak fallout period. The continuous input model yielded mixing coefficients comparable to those derived from excess Pb-210 profiles within an order of magnitude. (C) 2003 Elsevier Ltd. All rights reserved.
ISSN
0967-0645
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5601
DOI
10.1016/S0967-0645(03)00140-1
Bibliographic Citation
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, v.50, no.17-21, pp.2649 - 2673, 2003
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Subject
WEST CAROLINE BASIN; MID-ATLANTIC BIGHT; DEEP-SEA SEDIMENTS; EQUATORIAL PACIFIC; CONTINENTAL-SLOPE; FALLOUT RADIONUCLIDES; MIXING RATES; PLUTONIUM; PB-210; THORIUM
Type
Article
Language
English
Document Type
Article
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

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

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