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dc.contributor.authorHenson, Stephanie A.  Concept link
dc.contributor.authorSanders, Richard J.  Concept link
dc.contributor.authorMadsen, Esben  Concept link
dc.contributor.authorMorris, Paul J.  Concept link
dc.contributor.authorLe Moigne, Frederic A. C.  Concept link
dc.contributor.authorQuartly, Graham D.  Concept link
dc.date.accessioned2011-03-09T17:35:55Z
dc.date.available2011-08-18T08:26:22Z
dc.date.issued2011-02-18
dc.identifier.citationGeophysical Research Letters 38 (2011): L04606en_US
dc.identifier.urihttps://hdl.handle.net/1912/4386
dc.descriptionAuthor Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 38 (2011): L04606, doi:10.1029/2011GL046735.en_US
dc.description.abstractA major term in the global carbon cycle is the ocean's biological carbon pump which is dominated by sinking of small organic particles from the surface ocean to its interior. Several different approaches to estimating the magnitude of the pump have been used, yielding a large range of estimates. Here, we use an alternative methodology, a thorium isotope tracer, that provides direct estimates of particulate organic carbon export. A large database of thorium-derived export measurements was compiled and extrapolated to the global scale by correlation with satellite sea surface temperature fields. Our estimates of export efficiency are significantly lower than those derived from the f-ratio, and we estimate global integrated carbon export as ∼5 GtC yr−1, lower than most current estimates. The lack of consensus amongst different methodologies on the strength of the biological carbon pump emphasises that our knowledge of a major planetary carbon flux remains incomplete.en_US
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dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2011GL046735
dc.subjectCarbon exporten_US
dc.subjectThorium-234en_US
dc.subjectSatellite dataen_US
dc.titleA reduced estimate of the strength of the ocean's biological carbon pumpen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2011GL046735


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