Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension

<!doctype html> <html class="no-js" lang="en"> <head> <title>Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension - NASA/ADS</title> <link rel="apple-touch-icon" sizes="180x180" href="//styles/favicon/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="//styles/favicon/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="//styles/favicon/favicon-16x16.png"> <link rel="manifest" href="//styles/favicon/site.webmanifest"> <link rel="mask-icon" href="//styles/favicon/safari-pinned-tab.svg" color="#5bbad5"> <meta name="apple-mobile-web-app-title" content="NASA ADS"> <meta name="application-name" content="NASA ADS"> <meta name="msapplication-TileColor" content="#ffc40d"> <meta name="theme-color" content="#ffffff"> <link rel="stylesheet" href="/styles/css/styles.css"> <meta name="robots" content="noarchive"> <link rel="canonical" href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://ui.adsabs.harvard.edu/abs/2022JGRC..12718781Q/abstract"> <meta name="description" content="Vertical motions induced by mesoscale eddies in the upper ocean play a vital role in the heat transport over the global ocean. However, the spatial structure of vertical eddy velocity and associated heat flux remains unclear. This study addresses this issue in the Kuroshio-Oyashio Extension based on an eddy-rich Community Earth System Model simulation. Adopting a mesoscale eddy composite analysis, we show that the vertical eddy velocity is enhanced at edges of mesoscale eddies with a maximum magnitude of 0.8 m day<SUP>-1</SUP> in the upper ocean for anticyclonic eddies (AEs) and 0.5 m day<SUP>-1</SUP> for cyclonic eddies (CEs). The associated vertical heat flux is upward, reaching 52 and 32 W m<SUP>-2</SUP> along AEs' and CEs' periphery, respectively. Diagnostic analysis suggests that the enhanced vertical eddy motions at eddy edges are primarily attributed to the ageostrophic secondary circulation (ASC) under the turbulent thermal wind balance that accounts for more than 70% of the vertical eddy velocity and 80% of vertical eddy heat flux in the upper ocean. This ASC is stronger in winter than summer due to the intense turbulent mixing induced by strong surface cooling and wind stirring in winter. Accordingly, the vertical eddy velocity and associated heat flux exhibit a distinct seasonal cycle."> <meta property="og:type" content="article"> <meta property="og:title" content="Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension"> <meta property="og:site_name" content="NASA/ADS"> <meta property="og:description" content="Vertical motions induced by mesoscale eddies in the upper ocean play a vital role in the heat transport over the global ocean. However, the spatial structure of vertical eddy velocity and associated heat flux remains unclear. This study addresses this issue in the Kuroshio-Oyashio Extension based on an eddy-rich Community Earth System Model simulation. Adopting a mesoscale eddy composite analysis, we show that the vertical eddy velocity is enhanced at edges of mesoscale eddies with a maximum magnitude of 0.8 m day<SUP>-1</SUP> in the upper ocean for anticyclonic eddies (AEs) and 0.5 m day<SUP>-1</SUP> for cyclonic eddies (CEs). The associated vertical heat flux is upward, reaching 52 and 32 W m<SUP>-2</SUP> along AEs' and CEs' periphery, respectively. Diagnostic analysis suggests that the enhanced vertical eddy motions at eddy edges are primarily attributed to the ageostrophic secondary circulation (ASC) under the turbulent thermal wind balance that accounts for more than 70% of the vertical eddy velocity and 80% of vertical eddy heat flux in the upper ocean. This ASC is stronger in winter than summer due to the intense turbulent mixing induced by strong surface cooling and wind stirring in winter. Accordingly, the vertical eddy velocity and associated heat flux exhibit a distinct seasonal cycle."> <meta property="og:url" content="https://ui.adsabs.harvard.edu/abs/2022JGRC..12718781Q/abstract"> <meta property="og:image" content="https://ui.adsabs.harvard.edu/styles/img/transparent_logo.svg"> <meta property="article:published_time" content="10/2022"> <meta property="article:author" content="Qu, Yushan"> <meta property="article:author" content="Wang, Shengpeng"> <meta property="article:author" content="Jing, Zhao"> <meta property="article:author" content="Wang, Hong"> <meta property="article:author" content="Wu, Lixin"> <meta name="citation_journal_title" content="Journal of Geophysical Research (Oceans)"> <meta name="citation_authors" content="Qu, Yushan;Wang, Shengpeng;Jing, Zhao;Wang, Hong;Wu, Lixin"> <meta name="citation_title" content="Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension"> <meta name="citation_date" content="10/2022"> <meta name="citation_volume" content="127"> <meta name="citation_issue" content="10"> <meta name="citation_firstpage" content="e2022JC018781"> <meta name="citation_doi" content="10.1029/2022JC018781"> <meta name="citation_language" content="en"> <meta name="citation_abstract_html_url" content="https://ui.adsabs.harvard.edu/abs/2022JGRC..12718781Q/abstract"> <meta name="citation_publication_date" content="10/2022"> <link title="schema(PRISM)" rel="schema.prism" href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://prismstandard.org/namespaces/1.2/basic/"> <meta name="prism.publicationDate" content="10/2022"> <meta name="prism.publicationName" content="JGRC"> <meta name="prism.volume" content="127"> <meta name="prism.startingPage" content="e2022JC018781"> <link title="schema(DC)" rel="schema.dc" href="https://translate.google.com/website?sl=auto&tl=en&hl=en-GB&u=http://purl.org/dc/elements/1.1/"> <meta name="dc.identifier" content="doi:10.1029/2022JC018781"> <meta name="dc.date" content="10/2022"> <meta name="dc.source" content="JGRC"> <meta name="dc.title" content="Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension"> <meta name="dc.creator" content="Qu, Yushan"> <meta name="dc.creator" content="Wang, Shengpeng"> <meta name="dc.creator" content="Jing, Zhao"> <meta name="dc.creator" content="Wang, Hong"> <meta name="dc.creator" content="Wu, Lixin"> <meta name="twitter:card" content="summary_large_image"> <meta name="twitter:description" content="Vertical motions induced by mesoscale eddies in the upper ocean play a vital role in the heat transport over the global ocean. However, the spatial structure of vertical eddy velocity and associated heat flux remains unclear. This study addresses this issue in the Kuroshio-Oyashio Extension based on an eddy-rich Community Earth System Model simulation. Adopting a mesoscale eddy composite analysis, we show that the vertical eddy velocity is enhanced at edges of mesoscale eddies with a maximum magnitude of 0.8 m day<SUP>-1</SUP> in the upper ocean for anticyclonic eddies (AEs) and 0.5 m day<SUP>-1</SUP> for cyclonic eddies (CEs). The associated vertical heat flux is upward, reaching 52 and 32 W m<SUP>-2</SUP> along AEs' and CEs' periphery, respectively. Diagnostic analysis suggests that the enhanced vertical eddy motions at eddy edges are primarily attributed to the ageostrophic secondary circulation (ASC) under the turbulent thermal wind balance that accounts for more than 70% of the vertical eddy velocity and 80% of vertical eddy heat flux in the upper ocean. This ASC is stronger in winter than summer due to the intense turbulent mixing induced by strong surface cooling and wind stirring in winter. 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<li class="author"><a href="https://ui-adsabs-harvard-edu.translate.goog/search/?q=author:%22Wang,+Shengpeng%22&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Wang, Shengpeng</a></li>; <li class="author"><a href="https://ui-adsabs-harvard-edu.translate.goog/search/?q=author:%22Jing,+Zhao%22&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Jing, Zhao</a></li>; <li class="author"><a href="https://ui-adsabs-harvard-edu.translate.goog/search/?q=author:%22Wang,+Hong%22&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Wang, Hong</a></li>; <li class="author"><a href="https://ui-adsabs-harvard-edu.translate.goog/search/?q=author:%22Wu,+Lixin%22&_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB">Wu, Lixin</a></li> </ul> </div> <div class="s-abstract-text"> <h4 class="sr-only">Abstract</h4> <p>Vertical motions induced by mesoscale eddies in the upper ocean play a vital role in the heat transport over the global ocean. However, the spatial structure of vertical eddy velocity and associated heat flux remains unclear. This study addresses this issue in the Kuroshio-Oyashio Extension based on an eddy-rich Community Earth System Model simulation. Adopting a mesoscale eddy composite analysis, we show that the vertical eddy velocity is enhanced at edges of mesoscale eddies with a maximum magnitude of 0.8 m day<sup>-1</sup> in the upper ocean for anticyclonic eddies (AEs) and 0.5 m day<sup>-1</sup> for cyclonic eddies (CEs). The associated vertical heat flux is upward, reaching 52 and 32 W m<sup>-2</sup> along AEs' and CEs' periphery, respectively. Diagnostic analysis suggests that the enhanced vertical eddy motions at eddy edges are primarily attributed to the ageostrophic secondary circulation (ASC) under the turbulent thermal wind balance that accounts for more than 70% of the vertical eddy velocity and 80% of vertical eddy heat flux in the upper ocean. This ASC is stronger in winter than summer due to the intense turbulent mixing induced by strong surface cooling and wind stirring in winter. Accordingly, the vertical eddy velocity and associated heat flux exhibit a distinct seasonal cycle.</p> </div><br> <dl class="s-abstract-dl-horizontal"> <dt> Publication: </dt> <dd> <div id="article-publication"> Journal of Geophysical Research (Oceans) </div> </dd> <dt> Pub Date: </dt> <dd> October 2022 </dd> <dt> DOI: </dt> <dd><span> <a href="https://ui-adsabs-harvard-edu.translate.goog/link_gateway/2022JGRC..12718781Q/doi:10.1029/2022JC018781?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB" target="_blank" rel="noopener">10.1029/2022JC018781</a> <i class="fa fa-external-link"></i> </span> </dd> <dt> Bibcode: </dt> <dd><a href="https://ui-adsabs-harvard-edu.translate.goog/abs/2022JGRC..12718781Q/abstract?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-GB"> 2022JGRC..12718781Q </a> <i class="icon-help" title="The bibcode is assigned by the ADS as a unique identifier for the paper."></i> </dd> </dl> </article> </div> <div data-widget="ShowCitations"></div> <div data-widget="ShowReferences"></div> <div 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Spatial Structure of Vertical Motions and Associated Heat Flux Induced by Mesoscale Eddies in the Upper Kuroshio-Oyashio Extension - NASA/ADS