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dc.contributor.authorTagliabue, A
dc.contributor.authorHawco, NJ
dc.contributor.authorBundy, RM
dc.contributor.authorLanding, WM
dc.contributor.authorMilne, Angela
dc.contributor.authorMorton, PL
dc.contributor.authorSaito, MA
dc.date.accessioned2018-04-25T14:34:29Z
dc.date.issued2018-03-25
dc.identifier.issn0886-6236
dc.identifier.issn1944-9224
dc.identifier.urihttp://hdl.handle.net/10026.1/11349
dc.description.abstract

©2018. The Authors. Cobalt is an important micronutrient for ocean microbes as it is present in vitamin B 12 and is a co-factor in various metalloenzymes that catalyze cellular processes. Moreover, when seawater availability of cobalt is compared to biological demands, cobalt emerges as being depleted in seawater, pointing to a potentially important limiting role. To properly account for the potential biological role for cobalt, there is therefore a need to understand the processes driving the biogeochemical cycling of cobalt and, in particular, the balance between external inputs and internal cycling. To do so, we developed the first cobalt model within a state-of-the-art three-dimensional global ocean biogeochemical model. Overall, our model does a good job in reproducing measurements with a correlation coefficient of > 0.7 in the surface and > 0.5 at depth. We find that continental margins are the dominant source of cobalt, with a crucial role played by supply under low bottom-water oxygen conditions. The basin-scale distribution of cobalt supplied from margins is facilitated by the activity of manganese-oxidizing bacteria being suppressed under low oxygen and low temperatures, which extends the residence time of cobalt. Overall, we find a residence time of 7 and 250 years in the upper 250 m and global ocean, respectively. Importantly, we find that the dominant internal resupply process switches from regeneration and recycling of particulate cobalt to dissolution of scavenged cobalt between the upper ocean and the ocean interior. Our model highlights key regions of the ocean where biological activity may be most sensitive to cobalt availability.

dc.format.extent594-616
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoen
dc.publisherAmerican Geophysical Union (AGU)
dc.subjectbiogeochemistry
dc.subjecttrace elements
dc.subjectmodeling
dc.titleThe Role of External Inputs and Internal Cycling in Shaping the Global Ocean Cobalt Distribution: Insights From the First Cobalt Biogeochemical Model
dc.typejournal-article
dc.typeJournal Article
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000431991800005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.issue4
plymouth.volume32
plymouth.publication-statusPublished
plymouth.journalGlobal Biogeochemical Cycles
dc.identifier.doi10.1002/2017GB005830
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/BEACh
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeUnited States
dcterms.dateAccepted2018-03-12
dc.identifier.eissn1944-9224
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1002/2017GB005830
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-03-25
rioxxterms.typeJournal Article/Review


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