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Distribution of dissolved iron in Antarctic sea ice: spatial, seasonal, and inter-annual variability
Lannuzel, D.; Schoemann, V.; de Jong, J.; Pasquer, B.; van der Merwe, P.; Masson, F.; Tison, J.-L.; Bowie, A. (2010). Distribution of dissolved iron in Antarctic sea ice: spatial, seasonal, and inter-annual variability. J. Geophys. Res. 115(G3): 1-13. https://dx.doi.org/10.1029/2009JG001031
In: Journal of Geophysical Research. American Geophysical Union: Richmond. ISSN 0148-0227; e-ISSN 2156-2202
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal
Author keywords
    dissolved iron; total organic carbon; sea ice; seasonal and inter-annual variability; spatial distributions

Authors  Top 
  • Lannuzel, D.
  • Schoemann, V.
  • de Jong, J.
  • Pasquer, B.
  • van der Merwe, P.
  • Masson, F.
  • Tison, J.-L.
  • Bowie, A.

Abstract
    Results from recent field studies in Antarctic sea ice show no clear differences in dissolved iron (dFe) concentrations between pack ice sampled in East Antarctica (2.6–20.5 nmol/L), in the Weddell Sea (0.7–36.8 nmol/L), and in the Bellingshausen Sea (1.1–30.2 nmol/L). Dissolved Fe concentrations were also similar in land-fast ice collected in East Antarctica (0.7–4.3 nmol/L) and in the Ross Sea (1.1–6.0 nmol/L). In contrast, we observed a remarkable seasonal drawdown of dFe in sea ice for all reported studies. Furthermore, large inter-annual variations in depth-averaged dFe and organic matter concentrations were observed in sea ice collected in the East Antarctic sector between expeditions in late austral winter-spring of 2003 and 2007. Variability in the water column productivity and in the magnitude of the “new” Fe supply (e.g., upwelling, resuspended shelf sediments) at the time of sea ice formation could explain such differences.

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