Variation of the activity concentrations and fluxes of natural (

C. Gascó, M.P. Antón, R. Delfanti, A.M. González, J. Meral, C. Papucci

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Abstract

The activity concentrations and fluxes of natural (210Pb,210Po) and anthropogenic (239,240Pu,137Cs) radionuclides have been determined in the different water masses crossing the Strait of Gibraltar. New data have been gathered during four multidisciplinary and multinational sampling campaigns, performed between 1997 and 1999 within the framework of the CANIGO-FLUGIST Project. Mean activity concentrations of210Po (1.53±0.34 Bq m-3, n=30) and210Pb (1.16±0.50 Bq m-3, n=31) in the Atlantic water entering the Mediterranean basin are about double those measured in the Mediterranean outflow, namely 0.84±0.34 Bq m-3(n=22) for210Po and 0.66±0.34 Bq m-3(n=22) for210Pb. The opposite trend is observed for239,240Pu, with average concentrations of 9.9±3.0 mBq m-3(n=29) in the incoming Atlantic flow and 22.0±3.0 mBq m-3(n=22) in the outpouring Mediterranean water. In the case of137Cs, the same concentrations were quantified in the waters moving inwards (2.52±0.28 Bq m-3, n=27) and outwards (2.14±0.52 Bq m-3, n=21) from the Mediterranean Sea. On this basis, the Mediterranean basin experiences a net annual input flux of 14 TBq of210Pb and 19 TBq of210Po, and a net annual loss of 0.34 TBq of239,240Pu, while - at present -137Cs input and output fluxes appear to be balanced. © 2002 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)241 - 262
Number of pages22
JournalJournal of Environmental Radioactivity
Volume62
Issue number3
DOIs
Publication statusPublished - 2002
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Gascó, C., Antón, M. P., Delfanti, R., González, A. M., Meral, J., & Papucci, C. (2002). Variation of the activity concentrations and fluxes of natural (. Journal of Environmental Radioactivity, 62(3), 241 - 262. https://doi.org/10.1016/S0265-931X(01)00167-9