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dc.contributor.authorMüller, Juliane
dc.contributor.authorRomero, Oscar
dc.contributor.authorCowan, Ellen A.
dc.contributor.authorMcClymont, Erin L.
dc.contributor.authorForwick, Matthias
dc.contributor.authorAsahi, Hirofumi
dc.contributor.authorMärz, Christian
dc.contributor.authorMoy, Christopher M.
dc.contributor.authorSuto, Itsuki
dc.contributor.authorMix, Alan
dc.contributor.authorStoner, Joseph
dc.date.accessioned2019-01-16T08:52:31Z
dc.date.available2019-01-16T08:52:31Z
dc.date.issued2018-02-15
dc.description.abstractFertilization of the ocean by eolian dust and icebergs is an effective mechanism to enhance primary productivity. In particular, high-nutrient, low-chlorophyll (HNLC) areas where phytoplankton growth is critically iron-limited, such as the subarctic Pacific Ocean and the Southern Ocean, are proposed to respond to increases in bioavailable Fe supply with enhanced phytoplankton productivity and carbon export to the seafloor. While Fe-fertilization from dust is widely acknowledged to explain a higher export production during glacial periods in the Southern Ocean, paleoceanographic records supporting links between productivity and eolian dust and/or icebergs in the North Pacific are scarce. By combining independent proxies indicative of ice-sheet dynamics and ocean productivity from a single marine sedimentary record (Integrated Ocean Drilling Program [IODP] Site U1417), we present a comprehensive data set of phytoplankton response to different fertilization mechanisms in the subarctic northeast Pacific between 1.5 and 0.5 Ma, including the Mid Pleistocene Transition. Importantly, the timing of the fertilization events is more strongly controlled by local ice-sheet extent than by glacial-interglacial climate variability. Our findings indicate that fertilization by glacigenic debris results in productivity events in HNLC areas adjacent to ice sheets, and that this mechanism may represent an important, yet rarely considered, driver of phytoplankton growth.en_US
dc.description.sponsorshipGerman Research Foundation European Consortium Helmholtz Association The Natural Environment Research Council Philip Leverhulme Prize U.S. National Science Foundation The U.S. Science Support Program of the IODP Korea Polar Research Institute The Korean Government The Japan Agency for Marine-Earth Science and Technology Japan Society for the Promotion of Scienceen_US
dc.descriptionAccepted manuscript version. Published version available at <a href=https://doi.org/10.1130/G39904.1> https://doi.org/10.1130/G39904.1</a>.en_US
dc.identifier.citationMüller, J., Romero, O., Cowan, E.A., McClymont, E.L., Forwick, M., Asahi, H., ... Stoner, J. (2018). Cordilleran ice-sheet growth fueled primary productivity in the Gulf of Alaska, northeast Pacific Ocean. <i>Geology</i>, 46(4), 307-310. https://doi.org/10.1130/G39904.1en_US
dc.identifier.cristinIDFRIDAID 1624850
dc.identifier.doi10.1130/G39904.1
dc.identifier.issn0091-7613
dc.identifier.issn1943-2682
dc.identifier.urihttps://hdl.handle.net/10037/14455
dc.language.isoengen_US
dc.publisherGeological Society of Americaen_US
dc.relation.journalGeology
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology, glaciology: 465en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi, glasiologi: 465en_US
dc.titleCordilleran ice-sheet growth fueled primary productivity in the Gulf of Alaska, northeast Pacific Oceanen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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