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dc.contributor.authorRandelhoff, Achim
dc.contributor.authorFer, Ilker
dc.contributor.authorSundfjord, Arild
dc.contributor.authorTremblay, Jean-Éric
dc.contributor.authorReigstad, Marit
dc.date.accessioned2017-09-20T07:45:49Z
dc.date.available2017-09-20T07:45:49Z
dc.date.issued2016-07-31
dc.description.abstract<p>This study compiles colocated oceanic observations of high-resolution vertical profiles of nitrate concentration and turbulent microstructure around the Svalbard shelf slope, covering both the permanently ice-free Fram Strait and the pack ice north of Svalbard. The authors present an overview over the seasonal evolution of the distribution of nitrate and its relation to upper ocean stratification. The average upward turbulent diffusive nitrate flux across the seasonal nitracline during the Arctic summer season is derived, with average values of 0.3 and 0.7 mmol m<sup>−2</sup> d<sup>−1</sup> for stations with and without ice cover, respectively. The increase under ice-free conditions is attributed to different patterns of stratification under sea ice versus open water. The nitrate flux obtained from microstructure measurements lacked a seasonal signal. However, bottle incubations indicate that August nitrate uptake was reduced by more than an order of magnitude relative to the May values. It remains inconclusive whether the new production was limited by an unidentified factor other than <span class="math-equation-construct" data-equation-construct="true"><span class="math-equation-image" data-equation-image="true"><img class="inlineGraphic" alt="math formula" src="http://onlinelibrary.wiley.com/store/10.1002/2016JC011779/asset/equation/jgrc21822-math-0001.png?v=1&amp;s=d749b04249d7a3dc2c2db3828257f219288ac9ae"></span><span class="math-equation-mathml" style="display: none;" data-equation-mathml="true"><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mrow xmlns="http://www.w3.org/1998/Math/MathML" xmlns:cr="urn://wiley-online-library/content/render" xmlns:wiley="http://www.wiley.com/namespaces/wiley/wiley" xmlns:w="http://www.wiley.com/namespaces/wiley"><mi>N</mi><mrow><msubsup><mi>O</mi><mn>3</mn><mo>−</mo></msubsup></mrow></mrow></mml:math></span></span> supply in late summer, or the uptake was underestimated by the incubation method.</p>en_US
dc.descriptionSource at <a href=http://dx.doi.org/10.1002/2016JC011779> http://dx.doi.org/10.1002/2016JC011779 </a>en_US
dc.identifier.citationRandelhoff A, Fer I, Sundfjord A, Tremblay J, Reigstad M. Vertical fluxes of nitrate in the seasonal nitracline of the Atlantic sector of the Arctic Ocean. Journal of Geophysical Research - Oceans. 2016;121(7):5282-5285en_US
dc.identifier.cristinIDFRIDAID 1380742
dc.identifier.doi10.1002/2016JC011779
dc.identifier.issn2169-9275
dc.identifier.issn2169-9291
dc.identifier.urihttps://hdl.handle.net/10037/11489
dc.language.isoengen_US
dc.publisherAGU Publicationsen_US
dc.relation.journalJournal of Geophysical Research - Oceans
dc.relation.projectIDNorges forskningsråd: 229786en_US
dc.relation.projectIDNorges forskningsråd: 226415en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/229786/Norway/OnThinIce//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/226415/Norway/BridgingMarineProductivityRegimes//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.titleVertical fluxes of nitrate in the seasonal nitracline of the Atlantic sector of the Arctic Oceanen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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