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dc.contributor.authorMaiti, Kanchan  Concept link
dc.contributor.authorCharette, Matthew A.  Concept link
dc.contributor.authorBuesseler, Ken O.  Concept link
dc.contributor.authorKahru, Mati  Concept link
dc.date.accessioned2013-07-02T15:43:19Z
dc.date.available2014-10-22T08:57:22Z
dc.date.issued2013-04-23
dc.identifier.citationGeophysical Research Letters 40 (2013): 1557–1561en_US
dc.identifier.urihttps://hdl.handle.net/1912/6033
dc.descriptionAuthor Posting. © American Geophysical Union, 2013. 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 40 (2013): 1557–1561, doi:10.1002/grl.50219.en_US
dc.description.abstractIn the past two decades, a number of studies have been carried out in the Southern Ocean to look at export production using drifting sediment traps and thorium-234 based measurements, which allows us to reexamine the validity of using the existing relationships between production, export efficiency, and temperature to derive satellite-based carbon export estimates in this region. Comparisons of in situ export rates with modeled rates indicate a two to fourfold overestimation of export production by existing models. Comprehensive analysis of in situ data indicates two major reasons for this difference: (i) in situ data indicate a trend of decreasing export efficiency with increasing production which is contrary to existing export models and (ii) the export efficiencies appear to be less sensitive to temperature in this region compared to the global estimates used in the existing models. The most important implication of these observations is that the simplest models of export, which predict increase in carbon flux with increasing surface productivity, may require additional parameters, different weighing of existing parameters, or separate algorithms for different oceanic regimes.en_US
dc.description.sponsorshipThis work was supported by NASA award number NNX08AB48G.en_US
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/msword
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/grl.50219
dc.subjectBiological pumpen_US
dc.subjectSouthern Oceanen_US
dc.subjectCarbon exporten_US
dc.titleAn inverse relationship between production and export efficiency in the Southern Oceanen_US
dc.typeArticleen_US
dc.description.embargo2013-10-23en_US
dc.identifier.doi10.1002/grl.50219


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