{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361137044290308608.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/1999jc900051"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F1999JC900051"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/1999JC900051"}}],"dc:title":[{"@value":"Mesoscale eddies, satellite altimetry, and new production in the Sargasso Sea"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Satellite altimetry and hydrographic observations are used to characterize the mesoscale eddy field in the Sargasso Sea near Bermuda and to address the role of physical processes on the supply of new nutrients to the euphotic zone. The observed sea level anomaly (SLA) field is dominated by the occurrence of westward propagating features with SLA signatures as large as 25 cm, Eulerian temporal scales of roughly a month, lifetimes of several months, spatial scales of ∼200 km, and a propagation of ∼5 cm s<jats:sup>−1</jats:sup>. Hydrographic estimates of dynamic height anomaly (referenced to 4000 dbar) are well correlated with satellite SLA (<jats:italic>r</jats:italic><jats:sup>2</jats:sup> = 0.65), and at least 85% of the observed dynamic height variability is associated with the first baroclinic mode of motion. This allows us to apply the satellite observations to remotely estimate isopycnal displacements and the flux of nutrients into the euphotic zone due to eddy pumping. Eddy pumping is the process by which mesoscale eddies induce isopycnal displacements that lift nutrient‐replete waters into the euphotic zone, driving new primary production. A kinematic approach to the estimation of the eddy pumping results in a flux of 0.24 ± 0.1 mol N m<jats:sup>−2</jats:sup> yr<jats:sup>−1</jats:sup> (including a scale estimate for the small contribution due to 18° water eddies). This flux is more than an order of magnitude larger than the diapycnal diffusive flux as well as scale estimates for the vertical transport due to isopycnal mixing along sloping isopycnal surfaces. Eddy pumping and wintertime convection are the two dominant mechanisms transporting new nutrients into the euphotic zone, and the sum of all physical new nutrient supply fluxes effectively balances previous geochemical estimates of annual new production for this site. However, if biological transports (e.g., nitrogen fixation, etc.) are significant, the new nitrogen supply budget will be in excess of geochemical new production estimates. This suggests that the various physical and biological transport fluxes, as well as geochemical inferences of new production, still need to be reconciled and many outstanding questions remain.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381137044290308609","@type":"Researcher","foaf:name":[{"@value":"David A. Siegel"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044290308608","@type":"Researcher","foaf:name":[{"@value":"Dennis J. McGillicuddy"}]},{"@id":"https://cir.nii.ac.jp/crid/1381137044290308736","@type":"Researcher","foaf:name":[{"@value":"Erik A. Fields"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Oceans"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"1999-06-15","prism:volume":"104","prism:number":"C6","prism:startingPage":"13359","prism:endingPage":"13379"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F1999JC900051"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/1999JC900051"}],"createdAt":"2002-09-17","modifiedAt":"2023-09-23","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050001338209104384","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Impact of cyclonic eddies and typhoons on biogeochemistry in the oligotrophic ocean based on biogeochemical/physical/meteorological time-series at station KEO"}]},{"@id":"https://cir.nii.ac.jp/crid/1360005514422010880","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Impact of Ocean Physics on Marine Ecosystems in the Kuroshio and Kuroshio Extension Regions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360285708461991680","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Physical and biological roles of mesoscale eddies in Japanese eel larvae dispersal in the western North Pacific Ocean"}]},{"@id":"https://cir.nii.ac.jp/crid/1360567179762132864","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"The formation processes of phytoplankton growth and decline in mesoscale eddies in the western <scp>N</scp>orth <scp>P</scp>acific <scp>O</scp>cean"}]},{"@id":"https://cir.nii.ac.jp/crid/1390010292814511360","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Seasonal flux changes of radiolarians at Station K2 in the Western Subarctic Gyre"},{"@language":"ja","@value":"北西太平洋西部亜寒帯循環内Station K2におけるレディオラリア (放散虫類)・フラックスの季節変動"},{"@language":"ja-Kana","@value":"ホクセイ タイヘイヨウ セイブ アカンタイ ジュンカン ナイ Station K2 ニ オケル レディオラリア ホウサンチュウルイ フラックス ノ キセツ ヘンドウ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390858518831357952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Evaluation of new production in the tropical and subtropical oligotrophic ocean"},{"@language":"ja","@value":"熱帯・亜熱帯貧栄養海域における新生産の評価"},{"@language":"ja-Kana","@value":"ネッタイ アネッタイヒンエイヨウ カイイキ ニ オケル シン セイサン ノ ヒョウカ"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/1999jc900051"},{"@type":"CROSSREF","@value":"10.1002/9781119428428.ch11_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"},{"@type":"CROSSREF","@value":"10.5928/kaiyou.18.3_213_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"},{"@type":"CROSSREF","@value":"10.1038/s41598-018-23392-5_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"},{"@type":"CROSSREF","@value":"10.1002/2017jc012722_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"},{"@type":"CROSSREF","@value":"10.5928/kaiyou.19.4_165_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"},{"@type":"CROSSREF","@value":"10.1186/s40645-018-0196-3_references_DOI_HOSUowb9tDvok1nPDUEnVaw7zM3"}]}