Distribution and inventory of129I in the central Arctic Ocean

Nadia Buraglio, Ala A. Aldahan, Göran Possnert

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31 Citations (Scopus)


The concentration of 129I was measured in water samples from three depth profiles collected in the central Arctic Ocean during 1996. The results indicate >7×108 atoms/liter in the cold, low salinity, 100-m-deep surface layer, and 0.06×108 atoms/liter at a depth below 3 km. The total inventory of 129I in the region is estimated at about 2.7×1027 atoms, representing 34% of the total discharge from Sellafield and La Hague until 1996. Marine input accounts for a major part (>90% ) of the 129I inventory in the central Arctic Ocean while input from fresh water (ice melting and rivers), bomb tests and nuclear dumping contribute by about 3%. The inventory suggests a maximum marine transport time of 11 years for 129I from La Hague-Sellafield to the central Arctic. The 129I concentration at a depth below 3 km is about one order of magnitude higher than the estimated pre-anthropogenic global marine value, reflecting contribution from anthropogenic sources.

Original languageEnglish
Pages (from-to)1011-1014
Number of pages4
JournalGeophysical Research Letters
Issue number8
Publication statusPublished - Apr 15 1999
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • General Earth and Planetary Sciences


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