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<sup>129</sup>I in the Baltic Proper and Bothnian Sea: Application for estimation of water exchange and environmental impact

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Authors:
  • Yi, P. ;
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    Hohai University
  • Possnert, G. ;
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    Uppsala University
  • Aldahan, A. ;
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    Uppsala University
  • Hou, Xiaolin ;
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    Orcid logo0000-0002-4851-4858
    Center for Nuclear Technologies, Technical University of Denmark
  • Bryhn, A.C. ;
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    Lund University
  • He, P.
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    Uppsala University
DOI:
10.1016/j.jenvrad.2013.01.009
Abstract:
We report here new data and a mass balance model for 129I in the Baltic Proper and the Bothnian Sea covering the period from November-December 2009. The results showed that the general 129I concentrations in the Bothnian Sea were two-four folds lower than in the Baltic Proper for both surface and deep water. Water exchange between the two basins based on the 129I mass balance model suggests fluxes from the Baltic Proper to the Bothnian Sea and vice versa at 980 km3/y (600-1400 km3/y) and 1180 km3/y (780-1600 km3/y) respectively. Water retention time (residence time) in the Bothnian Sea was estimated at up to 4 years. Applying the 129I exchange model, an estimate of total phosphorus and nitrogen inflow from the Baltic Proper to the Bothnian Sea indicates values of 20 ± 7 × 103 tons/y and 300 ± 50 × 103 tons/y respectively. The values for the outflow from the Bothnian Sea to the Baltic Proper hold 12 ± 3 × 103 tons/y for total phosphorus and 283 ± 55 × 103 tons/y for total nitrogen. These data and application of 129I as a tracer of water masses provide information on small scale salinity changes which are vital for accurate understanding of the Baltic Sea ecosystems evolution through time. © 2013 Elsevier Ltd.
Type:
Journal article
Language:
English
Published in:
Journal of Environmental Radioactivity, 2013, Vol 120, p. 64-72
Keywords:
Mutagenesis; Radioactivity; Environmental impact
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2013
Scientific Level:
Scientific
ID:
239783201

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