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Small-scale open ocean currents have large effects on wind wave heights

Abstract : Tidal currents and large-scale oceanic currents are known to modify ocean wave properties, causing extreme sea states that are a hazard to navigation. Recent advances in the understanding and modeling capability of open ocean currents have revealed the ubiquitous presence of eddies, fronts, and filaments at scales 10-100 km. Based on realistic numerical models, we show that these structures can be the main source of variability in significant wave heights at scales less than 200 km, including important variations down to 10 km. Model results are consistent with wave height variations along satellite altimeter tracks, resolved at scales larger than 50 km. The spectrum of significant wave heights is found to be of the order of 70>>2/>(g2>>2>) times the current spectrum, where >> is the spatially averaged significant wave height, >> is the energy-averaged period, and g is the gravity acceleration. This variability induced by currents has been largely overlooked in spite of its relevance for extreme wave heights and remote sensing.Plain Language SummaryWe show that the variations in currents at scales 10 to 100 km are the main source of variations in wave heights at the same scales. Our work uses a combination of realistic numerical models for currents and waves and data from the Jason-3 and SARAL/AltiKa satellites. This finding will be of interest for the investigation of extreme wave heights, remote sensing, and air-sea interactions. As an immediate application, the present results will help constrain the error budget of the up-coming satellite missions, in particular the Surface Water and Ocean Topography (SWOT) mission, and decide how the data will have to be processed to arrive at accurate sea level and wave measurements. It will also help in the analysis of wave measurements by the CFOSAT satellite. </div> </div> <div class="keywords"> <div class="keyword-content"> <strong>Keywords</strong> : <a rel="nofollow" href="/search/index/q/*/keyword_t/waves/" target="_blank" class="btn btn-default btn-xs">waves</a> <a rel="nofollow" href="/search/index/q/*/keyword_t/currents/" target="_blank" class="btn btn-default btn-xs">currents</a> <a rel="nofollow" href="/search/index/q/*/keyword_t/SWOT/" target="_blank" class="btn btn-default btn-xs">SWOT</a> </div> </div> <div class="metadatas"> <div><strong>Document type</strong> : <div class="label label-ART label-danger"> Journal articles </div> </div> <div><strong>Domain</strong> : <blockquote style="margin-left:65px;margin-top:-15px;"> <div> <div> <strong> <a rel="nofollow" href="/search/index/q/*/level0_domain_s/sdu" target="_blank">Sciences of the Universe [physics]</a> </strong> </div> <div> <a rel="nofollow" href="/search/index/q/*/level0_domain_s/sdu" target="_blank">Sciences of the Universe [physics]</a> / <a rel="nofollow" href="/search/index/q/*/level1_domain_s/sdu.stu" target="_blank">Earth Sciences</a> / <a rel="nofollow" href="/search/index/q/*/level2_domain_s/sdu.stu.oc" target="_blank">Oceanography</a> </div> </div> </blockquote> </div> </div> <div class="metadatas-complete"> <span class="metadatas-complete-title"> Complete list of metadata </span> <span class="btn-view text-center"> <button type="button" class="btn btn-default btn-sm" aria-expanded="false" onclick="viewDocMetadatas(3689184)"> <span class="glyphicon glyphicon-th-list" aria-hidden="true" ></span>  Display </button> </span> <div class="content"></div> </div> <!-- Relationships --> <!-- Cited References --> <!-- Gallery --> <hr/> <div> <small><br/>Contributor : <a rel="nofollow" href="/search/index/q/*/contributorId_i/106505" target="_blank">Nathalie POTHIER</a> <a href='javascript:void(0);' onclick="$('#form-login').submit();">Connect in order to contact the contributor</a> <br/>Submitted on : Tuesday, June 7, 2022 - 8:54:03 AM<br/>Last modification on : Wednesday, June 8, 2022 - 3:10:24 AM <br/><br/> </small> </div> </div> <div class="col-md-4"> <!-- Fichiers --> <div class="widget widget-files"> <h3 class="widget-header"> File </h3> <div class="widget-content"> <div class="row"> <div class="col-md-4 text-center"> <a href="" target="_blank"> <img src="//" style="border: 0" class="img-thumbnail" alt="Vignette du document"/> </a> </div> <div class="col-md-8"> <a href="" target="_blank" data-toggle="tooltip" title="JGR Oceans - 2017 - Ardhuin - Small%u2010scale open ocean currents have large effects on wind wave heights.pdf - 3.59 Mo">JGR Oceans - 2017 - Ardhuin - ...</a> <div>Publisher files allowed on an open archive </div> </div> </div> </div> </div> <!-- Licence --> <div class="widget widget-licence"> <h3 class="widget-header">Licence</h3> <div class="widget-content"> <div class="text-center">Copyright</div> </div> </div> <!-- Open Access --> <!-- Publisher Link --> <!-- Identifiants --> <div class="widget widget-identifiants"> <h3 class="widget-header">Identifiers</h3> <div class="widget-content"> <ul> <li>HAL Id : <strong>insu-03682747, version 1</strong></li> <li>BIBCODE : <strong><a href="" target="_blank" referrerpolicy="strict-origin-when-cross-origin">2017JGRC..122.4500A</a></strong></li><li>DOI : <strong><a href="" target="_blank" referrerpolicy="strict-origin-when-cross-origin">10.1002/2016JC012413</a></strong></li> </ul> </div> </div> <!-- Collections --> <div class="widget widget-collection"> <h3 class="widget-header">Collections</h3> <div class="widget-content"> <p><a href="/INSU" target="_blank" data-toggle="tooltip" title="INSU - Institut National des Sciences de l'Univers">INSU</a> | <a href="/UNIV-BREST" target="_blank" data-toggle="tooltip" title="Université de Bretagne occidentale - Brest (UBO)">UNIV-BREST</a> | <a href="/CNRS" target="_blank" data-toggle="tooltip" title="CNRS - Centre national de la recherche scientifique">CNRS</a> | <a href="/GEO-OCEAN" target="_blank" data-toggle="tooltip" title="GEO-OCEAN">GEO-OCEAN</a></p> </div> </div> <!-- Relations --> <!-- Citation --> <div class="widget widget-citation"> <h3 class="widget-header">Citation</h3> <div class="widget-content ref-biblio">Fabrice Ardhuin, Sarah T. Gille, Dimitris Menemenlis, Cesar B. Rocha, Nicolas Rascle, et al.. Small-scale open ocean currents have large effects on wind wave heights. <i>Journal of Geophysical Research: Oceans</i>, 2017, 122, pp.4500-4517. <a target="_blank" href="">⟨10.1002/2016JC012413⟩</a>. <a target="_blank" href="">⟨insu-03682747⟩</a></div> </div> <!-- Export --> <div class="widget widget-export"> <h3 class="widget-header">Export</h3> <div class="widget-content" style="text-align:center"> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/bibtex" role="button" target="_blank">BibTeX</a> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/tei" role="button" target="_blank">TEI</a> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/dc" role="button" target="_blank">DC</a> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/dcterms" role="button" target="_blank">DCterms</a> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/endnote" role="button">EndNote</a> <a class="widget-export-btn btn btn-default btn-sm" href="/insu-03682747v1/datacite" role="button">Datacite</a> </div> </div> <!-- Partager --> <div class="widget widget-share"> <h3 class="widget-header">Share</h3> <div class="widget-content" > <!-- AddToAny BEGIN --> <div class="a2a_kit a2a_kit_size_32 a2a_default_style"> <a class="a2a_button_facebook"></a> <a class="a2a_button_twitter"></a> <a class="a2a_button_email"></a> <a class="a2a_dd" href=""></a> </div> <script async src=""></script> <!-- AddToAny END --> </div> </div> <!-- Altmetrics --> <div class="widget widget-metrics"> <h3 class="widget-header">Metrics</h3> <div class="widget-content" style="text-align: center"> <div class="row"> <div class="col-md-6"> <div style="height:3em"><strong>Record views</strong></div> <h2 style="margin-top:10px;"><span class="label label-primary">0</span></h2> </div> <div class="col-md-6"> <div style="height:3em"><strong>Files downloads</strong></div> <h2 style="margin-top:10px;"><span class="label label-primary">0</span></h2> </div> </div> <hr style="margin-top:20px;margin-bottom:20px;"/> <div data-badge-details="right" data-badge-type="donut" data-hide-no-mentions="false" class="altmetric-embed" data-doi='10.1002/2016JC012413' ></div> </div> </div> </div> </div> </div> </div> </div> </div> <!-- **************************** Footer ****************************** --> <footer role="contentinfo" class="footer footer-default"> <div class="row" style="margin:0"> <div class="col-sm-4 col-md-2"> <h5>Contact</h5> <ul> <li> <a href="//" target="_blank" rel="noopener">Support</a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <h5>Resources</h5> <ul> <li> <a href="//" target="_blank" >Documentation</a> </li> <li> <a href="//" target="_blank" > FAQ </a> </li> <li> <a href="" target="_blank" > API </a> </li> <li> <a href="" target="_blank" > OAI-PMH </a> </li> <li> <a href="" target="_blank" > AuréHAL </a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <h5> Information</h5> <ul> <li> <a href="">Personal data and privacy </a> </li> <li> <a href="">Legal notice </a> </li> <li> <a href="">Accessibility</a> </li> <li> <a href="" >RGAA</a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <h5> Legal issues</h5> <ul> <li> <a href="" target="_blank" >I publish, what are my rights?</a> </li> <li> <a href="" target="_blank" > Sherpa Romeo </a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <h5> Portails </h5> <ul> <li><a href="" >Portals list</a></li> <li><a href="//" target="_blank" >HAL SHS</a></li> <li><a href="//" target="_blank" >HAL Thèses</a></li> <li><a href="//" target="_blank" >mediHAL</a></li> </ul> </div> <div class="col-sm-4 col-md-2"> <h5> CCSD </h5> <ul> <li> <a href="//" target="_blank" > CCSD </a> </li> <li> <a href="//" target="_blank" > </a> </li> <li> <a href="//" target="_blank" > </a> </li> </ul> </div> </div> </footer> <script type="text/javascript"> window.addEventListener("DOMContentLoaded", () => { $(document.body).tooltip({ selector: '[data-toggle="tooltip"]' , html: true, container: 'body'}); // Retrieve all buttons, convert it to an Array. 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