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New insights on the role of sea ice in intercepting atmospheric pollutants using (129)I.

Authors
  • Gómez-Guzmán, J M
  • Cámara-Mor, P
  • Suzuki, T
  • López-Gutiérrez, J M
  • Mas, J L
  • Masqué, P
  • Moran, S B
  • Smith, J N
Type
Published Article
Journal
Marine Pollution Bulletin
Publisher
Elsevier
Publication Date
Dec 15, 2014
Volume
89
Issue
1-2
Pages
180–190
Identifiers
DOI: 10.1016/j.marpolbul.2014.10.004
PMID: 25457809
Source
Medline
Keywords
License
Unknown

Abstract

Measurements of (129)I carried out on sea ice samples collected in the central Arctic Ocean in 2007 revealed relatively high levels in the range of 100-1400×10(7) at L(-1) that are comparable to levels measured in the surface mixed layer of the ocean at the same time. The (129)I/(127)I ratio in sea ice is much greater than that in the underlying water, indicating that the (129)I inventory in sea ice cannot be supported by direct uptake from seawater or by iodine volatilization from proximal (nearby) oceanic regimes. Instead, it is proposed that most of the (129)I inventory in the sea ice is derived from direct atmospheric transport from European nuclear fuel reprocessing plants at Sellafield and Cap La Hague. This hypothesis is supported by back trajectory simulations indicating that volume elements of air originating in the Sellafield/La Hague regions would have been present at arctic sampling stations coincident with sampling collection.

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