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Showing 1–4 of 4 results
Advanced filters: Author: Géraldine Sarthou Clear advanced filters

  • Mineral dust and marine sediment resuspension are generally considered the primary sources of the nutrient iron to the oceans. Numerical model results suggest that iron released by hydrothermal activity is also an important source of dissolved iron, particularly in the Southern Ocean.

    • Alessandro Tagliabue
    • Laurent Bopp
    • Catherine Jeandel
    Research
    Nature Geoscience
    Volume: 3, P: 252-256

  • The geographical distribution and controlling factors of marine N2 fixation are understudied. Here the authors find increasing rates of N2 fixation from the Sargasso Sea to the coastal waters of North America, driven primarily by cyanobacterial diazotrophs and best correlated with phosphorus availability and chlorophyll-a concentrations.

    • Weiyi Tang
    • Seaver Wang
    • Nicolas Cassar
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-10

  • A study of a phytoplankton bloom in the Southern Ocean induced by the supply of iron from deep waters below finds that the efficiency of fertilization (the ratio of carbon exported to the ocean interior to the amount of iron supplied) is at least ten times higher than estimates from short-term experiments. This suggests that changes in the supply of iron from deep water to the surface ocean may have a greater effect on atmospheric carbon dioxide concentrations than previously thought.

    • Stéphane Blain
    • Bernard Quéguiner
    • Thibaut Wagener
    Research
    Nature
    Volume: 446, P: 1070-1074