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Distribution of dissolved iron in Antarctic sea ice: Spatial, seasonal, and inter-annual variability
journal contribution
posted on 2023-05-17, 04:54 authored by Delphine LannuzelDelphine Lannuzel, Schoemann, V, de Jong, J, Benedicte PasquerBenedicte Pasquer, Pier van der MerwePier van der Merwe, Masson, F, Tison, JL, Andrew BowieAndrew Bowie[1] 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.
History
Publication title
Journal of Geophysical ResearchVolume
115Pagination
EJISSN
0148-0227Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright © 2010 American Geophysical Union.Repository Status
- Restricted