Lagrangian perspectives on iron delivery downstream of Kerguelen
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چکیده
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منابع مشابه
A tale of three islands: Downstream natural iron fertilization in the Southern Ocean
Iron limitation of primary productivity prevails across much of the Southern Ocean but there are exceptions; in particular, the phytoplankton blooms associated with the Kerguelen Plateau, Crozet Islands, and South Georgia. These blooms occur annually, fertilized by iron and nutrient-rich shelf waters that are transported downstream from the islands. Here we use a high-resolution (1/128) ocean g...
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Iron (Fe) uptake by the microbial community and the contribution of three different size fractions was determined during spring phytoplankton blooms in the naturally Fe-fertilized area off the Kerguelen Islands (KEOPS2). Total Fe uptake in surface waters was on average 34± 6 pmolFeL d, and microplankton (> 25 μm size fraction; 40–69 %) and pico-nanoplankton (0.8–25 μm size fraction; 29–59 %) we...
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Natural iron fertilisation from Southern Ocean islands results in high primary production and phytoplankton biomass accumulations readily visible in satellite ocean colour observations. These images reveal great spatial complexity with highly varying concentrations of chlorophyll, presumably reflecting both variations in iron supply and conditions favouring phytoplankton accumulation. To examin...
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تاریخ انتشار 2015