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| Titel |
Iodine isotopes species in surface water along the eastern North Atlantic |
| VerfasserIn |
Peng He, Ala Aldahan, Göran Possnert, Xiaolin Hou |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250072440
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| Zusammenfassung |
| Concentrations and species of iodine isotopes (127I and 129I) provide vital information about
iodine geochemistry and water circulation patterns in oceans. Extensive investigations of
anthropogeic 129I have been focused on the Arctic Ocean and the Nordic Seas as they
represent natural pathways of water masses that return to the North Atlantic. Levels of
anthropogenic 129I in the Atlantic Ocean are, however, still unknown. We here present first
data on 127I and 129I as well as their species (iodide and iodate) in a surface water
transect, collected in November 2010, along the eastern North Atlantic between
30-50Ë N. The results show average 129I concentration of 0.69Ã108 atoms/L with
occurrence of peaks (reaching up to 12.67Ã108 atoms/L). The sources of the peaks
are attributed to 129I transport from the English Channel and Irish Sea, as well as
to Mediterranean outflows that run down in the Gulf of Cadiz. Species analysis
reveals that iodate is predominant in the analyzed waters for both 127I and 129I.
Despite that the Iodide/iodate of 127I shows rather constant values, the species ratio
for 129I seems to vary in response to source and residence time in the water body. |
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