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245 00 |a Deep carbon export from a Southern Ocean iron-fertilized diatom bloom |h [electronic resource] |y English.
260        |a [S.l.] : |b Macmillan Publishers Limited, |c 2012-07-19.
490        |a Nature Volume 487.
506        |a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights.
520 3    |a 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 Circumpolar Current, during which we tracked sinking particles from the surface to the deep-sea floor. A large diatom bloom peaked in the fourth week after fertilization. This was followed by mass mortality of several diatom species that formed rapidly sinking, mucilaginous aggregates of entangled cells and chains. Taken together, multiple lines of evidence—although each with important uncertainties—lead us to conclude that at least half the bloom biomass sank far below a depth of 1,000 metres and that a substantial portion is likely to have reached the sea floor. Thus, iron-fertilized diatom blooms may sequester carbon for timescales of centuries in ocean bottom water and for longer in the sediments.
533        |a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software.
650        |a climate change.
650        |a fertilization.
650        |a iron compounds.
651        |a Southern Ocean.
700        |a Victor Smetacek.
700        |a Christine Klaas.
700        |a Volker H. Strass.
700        |a Philipp Assmy.
700        |a Marina Montresor.
700        |a Boris Cisewski.
700        |a Nicolas Savoye.
700        |a Adrian Webb.
700        |a Francesco d'Ovidio.
700        |a Jesus M. Arrieta.
700        |a Ulrich Bathmann.
700        |a Richard Bellerby.
700        |a Gry Mine Berg.
700        |a Peter Croot.
700        |a Santiago Gonzalez.
700        |a Joachim Henjes.
700        |a Gerhard J. Herndl.
700        |a Linn J. Hoffmann.
700        |a Harry Leach.
700        |a Martin Losch.
700        |a Matthew M. Mills.
700        |a Craig Neill.
700        |a Ilka Peeken.
700        |a Rudiger Rottgers.
700        |a Oliver Sachs.
700        |a Eberhard Sauter.
700        |a Maike M. Schmidt.
700        |a Jill Schwarz.
700        |a Anja Terbruggen.
700        |a Dieter Wolf-Gladrow.
830    0 |a dpSobek.
830    0 |a Sea Level Rise.
852        |a dpSobek |c Sea Level Rise
856 40 |u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15042598/00001 |y Click here for full text
992 04 |a http://dpanther.fiu.edu/sobek/content/FI/15/04/25/98/00001/FI15042598_thm.jpg
997        |a Sea Level Rise


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