Recent Transport History of Fukushima Radioactivity in the Northeast Pacific Ocean.
Identifieur interne : 000484 ( Main/Exploration ); précédent : 000483; suivant : 000485Recent Transport History of Fukushima Radioactivity in the Northeast Pacific Ocean.
Auteurs : John N. Smith [Canada] ; Vincent Rossi [France] ; Ken O. Buesseler [États-Unis] ; Jay T. Cullen [Canada] ; Jack Cornett [Canada] ; Richard Nelson [Canada] ; Alison M. Macdonald [États-Unis] ; Marie Robert [Canada] ; Jonathan Kellogg [Canada]Source :
- Environmental science & technology [ 1520-5851 ] ; 2017.
Abstract
The large inventory of radioactivity released during the March, 2011 Fukushima Dai-ichi nuclear reactor accident in Japan spread rapidly across the North Pacific Ocean and was first observed at the westernmost station on Line P, an oceanographic sampling line extending 1500 km westward of British Columbia (BC), Canada in June 2012. Here, time series measurements of (134)Cs and (137)Cs in seawater on Line P and on the CLIVAR-P16N 152°W line reveal the recent transport history of the Fukushima radioactivity tracer plume through the northeast Pacific Ocean. During 2013 and 2014 the Fukushima plume spread onto the Canadian continental shelf and by 2015 and early 2016 it reached (137)Cs values of 6-8 Bq/m(3) in surface water along Line P. Ocean circulation model simulations that are consistent with the time series measurements of Fukushima (137)Cs indicate that the 2015-2016 results represent maximum tracer levels on Line P and that they will begin to decline in 2017-2018. The current elevated Fukushima (137)Cs levels in seawater in the eastern North Pacific are equivalent to fallout background levels of (137)Cs that prevailed during the 1970s and do not represent a radiological threat to human health or the environment.
DOI: 10.1021/acs.est.7b02712
PubMed: 28876047
Affiliations:
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Smith</name><affiliation wicri:level="1"><nlm:affiliation>Bedford Institute of Oceanography , Fisheries and Oceans Canada, Dartmouth, Nova Scotia B2Y 4A2, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Bedford Institute of Oceanography , Fisheries and Oceans Canada, Dartmouth, Nova Scotia B2Y 4A2</wicri:regionArea><wicri:noRegion>Nova Scotia B2Y 4A2</wicri:noRegion></affiliation></author><author><name sortKey="Rossi, Vincent" sort="Rossi, Vincent" uniqKey="Rossi V" first="Vincent" last="Rossi">Vincent Rossi</name><affiliation wicri:level="1"><nlm:affiliation>Mediterranean Institute of Oceanography (UM 110, UMR 7294), CNRS, Aix Marseille Université , Université Toulon, IRD, 13288 Marseille, France.</nlm:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Mediterranean Institute of Oceanography (UM 110, UMR 7294), CNRS, Aix Marseille Université , Université Toulon, IRD, 13288 Marseille</wicri:regionArea><wicri:noRegion>13288 Marseille</wicri:noRegion><placeName><settlement type="city">Marseille</settlement><region type="région" nuts="2">Provence-Alpes-Côte d'Azur</region></placeName></affiliation></author><author><name sortKey="Buesseler, Ken O" sort="Buesseler, Ken O" uniqKey="Buesseler K" first="Ken O" last="Buesseler">Ken O. 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Here, time series measurements of (134)Cs and (137)Cs in seawater on Line P and on the CLIVAR-P16N 152°W line reveal the recent transport history of the Fukushima radioactivity tracer plume through the northeast Pacific Ocean. During 2013 and 2014 the Fukushima plume spread onto the Canadian continental shelf and by 2015 and early 2016 it reached (137)Cs values of 6-8 Bq/m(3) in surface water along Line P. Ocean circulation model simulations that are consistent with the time series measurements of Fukushima (137)Cs indicate that the 2015-2016 results represent maximum tracer levels on Line P and that they will begin to decline in 2017-2018. The current elevated Fukushima (137)Cs levels in seawater in the eastern North Pacific are equivalent to fallout background levels of (137)Cs that prevailed during the 1970s and do not represent a radiological threat to human health or the environment.</div></front></TEI><affiliations><list><country><li>Canada</li><li>France</li><li>États-Unis</li></country><region><li>Provence-Alpes-Côte d'Azur</li></region><settlement><li>Marseille</li></settlement></list><tree><country name="Canada"><noRegion><name sortKey="Smith, John N" sort="Smith, John N" uniqKey="Smith J" first="John N" last="Smith">John N. Smith</name></noRegion><name sortKey="Cornett, Jack" sort="Cornett, Jack" uniqKey="Cornett J" first="Jack" last="Cornett">Jack Cornett</name><name sortKey="Cullen, Jay T" sort="Cullen, Jay T" uniqKey="Cullen J" first="Jay T" last="Cullen">Jay T. Cullen</name><name sortKey="Kellogg, Jonathan" sort="Kellogg, Jonathan" uniqKey="Kellogg J" first="Jonathan" last="Kellogg">Jonathan Kellogg</name><name sortKey="Nelson, Richard" sort="Nelson, Richard" uniqKey="Nelson R" first="Richard" last="Nelson">Richard Nelson</name><name sortKey="Robert, Marie" sort="Robert, Marie" uniqKey="Robert M" first="Marie" last="Robert">Marie Robert</name></country><country name="France"><region name="Provence-Alpes-Côte d'Azur"><name sortKey="Rossi, Vincent" sort="Rossi, Vincent" uniqKey="Rossi V" first="Vincent" last="Rossi">Vincent Rossi</name></region></country><country name="États-Unis"><noRegion><name sortKey="Buesseler, Ken O" sort="Buesseler, Ken O" uniqKey="Buesseler K" first="Ken O" last="Buesseler">Ken O. Buesseler</name></noRegion><name sortKey="Macdonald, Alison M" sort="Macdonald, Alison M" uniqKey="Macdonald A" first="Alison M" last="Macdonald">Alison M. Macdonald</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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