Sr-90, Cs-137 and Pu-239,Pu-240 concentration surface water time series in the Pacific and Indian Oceans - WOMARS results SCIE SCOPUS

Cited 81 time in WEB OF SCIENCE Cited 0 time in Scopus
Title
Sr-90, Cs-137 and Pu-239,Pu-240 concentration surface water time series in the Pacific and Indian Oceans - WOMARS results
Author(s)
Povinec, PP; Aarkrog, A; Buesseler, KO; Delfanti, R; Hirose, K; Hong, GH; Ito, T; Livingston, HD; Nies, H; Noshkin, VE; Shima, S; Togawa, O
Publication Year
2005
Abstract
Under an IAEA's Co-ordinated Research Project "Worldwide Marine Radioactivity Studies (WOMARS)" Sr-90, Cs-137 and Pu-239,Pu-240 concentration surface water time series in the Pacific and Indian Oceans have been investigated. The Pacific and Indian Oceans were divided into 17 latitudinal boxes according to ocean circulation, global fallout patterns and the location of nuclear weapons test sites. The present levels and time trends in radionuclide concentrations in surface water for each box were studied and the corresponding effective half-lives were estimated. For the year 2000, the estimated average Sr-90, Cs-137 and Pu-239,Pu-240 concentrations in surface waters of the Pacific and Indian Oceans varied from 0.1 to 1.5 mBq/ L, 0.1 to 2.8 mBq/L, and 0.1 to 5.2 mu Bq/L, respectively. The mean effective half-lives for 90Sr and Cs-137 in surface water were 12 +/- 1 years for the North, 20 +/- 1 years for the South and 21 +/- 2 years for the Equatorial Pacific. For Pu-239,Pu-240 the corresponding mean effective half-lives were 7 +/- 1 years for the North, 12 +/- 4 years for the South and 10 +/- 2 years for the Equatorial Pacific. For the Indian Ocean the mean effective half-lives of Cs-137 and Pu-239,Pu-240 were 21 +/- 2 years and 9 +/- 1 years, respectively. There is evidence that fallout removal rates before 1970 were faster than those observed during recent decades. The estimated surface water concentrations of Sr-90, Cs-137 and Pu-239,Pu-240 in latitudinal belts of the Pacific and Indian Oceans for the year 2000 may be used as the average levels so that any new contribution from nuclear facilities, nuclear weapons test sites, radioactive waste dumping sites and from possible nuclear accidents can be identified. (c) 2005 Elsevier Ltd. All rights reserved.
ISSN
0265-931X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5144
DOI
10.1016/j.jenvrad.2004.12.003
Bibliographic Citation
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, v.81, no.1, pp.63 - 87, 2005
Publisher
ELSEVIER SCI LTD
Subject
WESTERN NORTH PACIFIC; ANTHROPOGENIC RADIONUCLIDES; FALLOUT RADIONUCLIDES; SPATIAL VARIATIONS; GEOSECS STATIONS; EAST/JAPAN SEA; DISTRIBUTIONS; PLUTONIUM; SEAWATER; EXPEDITION
Keywords
radionuclides; strontium-90; caesium-137; plutonium-239,240; surface water; time series; Pacific Ocean; Indian Ocean; Southern Ocean
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse