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Ocean islands fuel productivity and carbon sequestration through natural iron fertilization
Date:1/30/2009

t 3,000 meters and in the sediment was two to three times higher beneath the natural fertilized region than for the nearby iron-poor region. In addition, the sediment record shows that this has been so throughout the Holocene (about 10,000 years ago until present).

In recent years, schemes to fight global warming have included sequestering carbon in the deep ocean by fertilizing the ocean with iron to artificially induce plankton blooms. As public interest in these ideas has increased, the authors point out that the amount of carbon sequestered in the deep ocean for a given input of iron falls far short of previous geoengineering estimates, "with significant implications for proposals to mitigate the effects of climate change through purposeful addition of iron to the ocean," wrote lead author Pollard.


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Contact: Stephanie Murphy
media@whoi.edu
508-289-2271
Woods Hole Oceanographic Institution
Source:Eurekalert

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