Accumulation of anthropogenic and natural radionuclides in bottom sediments of the Northwest Pacific Ocean
SCIE
SCOPUS
Cited 40 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)
-
Alternative Author(s)
- 홍기훈; 김영일; 정창수; 김석현; 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
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.