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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 Research

Volume

115

Pagination

EJ

ISSN

0148-0227

Department/School

Institute for Marine and Antarctic Studies

Publisher

Amer Geophysical Union

Place of publication

2000 Florida Ave Nw, Washington, USA, Dc, 20009

Rights statement

Copyright © 2010 American Geophysical Union.

Repository Status

  • Restricted

Socio-economic Objectives

Measurement and assessment of marine water quality and condition

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