Deep carbon export from a Southern Ocean iron-fertilized diatom bloom

@article{Smetcek2012DeepCE,
  title={Deep carbon export from a Southern Ocean iron-fertilized diatom bloom},
  author={V. Smet{\'a}cek and Christine Klaas and Volker H. Strass and Philipp Assmy and Marina Montresor and Boris Cisewski and Nicolas Savoye and Adrian Webb and F. d’Ovidio and Jes{\'u}s Maria Arrieta and Ulrich V. Bathmann and Richard G. J. Bellerby and Gry Mine Berg and Peter L. Croot and Santiago Gonzalez and Joachim Henjes and Gerhard J. Herndl and Linn J Hoffmann and Harry Leach and Martin Losch and Matthew M. Mills and Craig Neill and Ilka Peeken and R{\"u}diger R{\"o}ttgers and Oliver Sachs and Eberhard J. Sauter and Maike M. Schmidt and Jill Nicola Schwarz and Anja Terbr{\"u}ggen and Dieter A. Wolf-Gladrow},
  journal={Nature},
  year={2012},
  volume={487},
  pages={313-319}
}
Fertilization of the ocean by adding iron compounds has induced diatom-dominated phytoplankton blooms accompanied by considerable carbon dioxide drawdown in the ocean surface layer. However, because the fate of bloom biomass could not be adequately resolved in these experiments, the timescales of carbon sequestration from the atmosphere are uncertain. Here we report the results of a five-week experiment carried out in the closed core of a vertically coherent, mesoscale eddy of the Antarctic… Expand
Biogeochemistry: The great iron dump
TLDR
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Thick-shelled, grazer-protected diatoms decouple ocean carbon and silicon cycles in the iron-limited Antarctic Circumpolar Current
TLDR
It is suggested that large-scale iron fertilization of the silicate-rich Southern Ocean will not change silicon sequestration but will add carbon to the sinking silica flux, implying that thick-shelled, hence grazer-protected, diatom species evolved in response to heavy copepod grazing pressure in the presence of an abundant silicate supply. Expand
Iron fertilization enhanced net community production but not downward particle flux during the Southern Ocean iron fertilization experiment LOHAFEX
TLDR
The data are consistent with the view that nitrate-rich but silicate-deficient waters are not poised for enhanced particle export upon iron addition, and attribute the lack of fertilization-induced export to silicon limitation of diatoms and reprocessing of sinking particles by detritus feeders. Expand
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The production of organic carbon in the ocean’s surface and its subsequent downward export transfers carbon dioxide to the deep ocean. This CO2 drawdown is countered by the biological precipitationExpand
ON THE SUB-SEASONAL PROCESSES CONTROLLING THE NATURAL PHYTOPLANKTON ABUNDANCE AND BIOLOGICAL PUMP IN THE DRAKE PASSAGE
The biological pump is an important aspect of the global carbon cycle. Phytoplankton blooms in the surface ocean draw down atmospheric carbon dioxide and package it as organic particulates that sinkExpand
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