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The Effects of Iron Fertilization on Carbon Sequestration in the Southern Ocean
Ken O. Buesseler,*John E. Andrews,Steven M. Pike,Matthew A. Charette
An unresolved issue in ocean and climate sciences is whetherchanges to the surface ocean input of the micronutrient ironcan alter the flux of carbon to the deep ocean. During the SouthernOcean Iron Experiment, we measured an increase in the flux ofparticulate carbon from the surface mixed layer, as well aschanges in particle cycling below the iron-fertilized patch.The flux of carbon was similar in magnitude to that of naturalblooms in the Southern Ocean and thus small relative to globalcarbon budgets and proposed geoengineering plans to sequesteratmospheric carbon dioxide in the deep sea.
Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
* To whom correspondence should be addressed. E-mail: kbuesseler{at}whoi.edu
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