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		<doi>10.1038/s41598-020-79386-9</doi>
		<issn>2045-2322</issn>
		<citationkey>GouveiaDuLoAsToAsGh:2021:PeMeEd</citationkey>
		<title>Persistent meanders and eddies lead to quasi-steady Lagrangian transport patterns in a weak western boundary current</title>
		<year>2021</year>
		<month>Dec.</month>
		<typeofwork>journal article</typeofwork>
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		<author>Gouveia, Mainara Biazati,</author>
		<author>Duran, Rodrigo,</author>
		<author>Lorenzzetti, João Antonio,</author>
		<author>Assireu, Arcilan T.,</author>
		<author>Toste, Raquel,</author>
		<author>Assad, Luiz Paulo de F.,</author>
		<author>Gherardi, Douglas Francisco Marcolino,</author>
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		<orcid>0000-0002-6785-1841</orcid>
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		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>National Energy Technology Laboratory</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade Federal de Itajubá (UNIFEI)</affiliation>
		<affiliation>Universidade Federal do Rio de Janeiro (UFRJ)</affiliation>
		<affiliation>Universidade Federal do Rio de Janeiro (UFRJ)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>mainara.gouveia@inpe.br</electronicmailaddress>
		<electronicmailaddress>r.duran@theissresearch.org</electronicmailaddress>
		<electronicmailaddress>joao.lorenzzetti@inpe.br</electronicmailaddress>
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		<electronicmailaddress>douglas.gheardi@inpe.br</electronicmailaddress>
		<journal>Scientific Reports</journal>
		<volume>11</volume>
		<number>1</number>
		<pages>e497</pages>
		<secondarymark>B2_BIODIVERSIDADE B3_ODONTOLOGIA B3_LETRAS_/_LINGUÍSTICA C_CIÊNCIAS_BIOLÓGICAS_III C_BIOTECNOLOGIA C_ASTRONOMIA_/_FÍSICA</secondarymark>
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		<abstract>The Brazil Current (BC) is a weak western boundary current fowing along the Southwestern Atlantic Ocean. It is frequently described as a fow with intense mesoscale activity and relatively low volume transport between 5.0 and 10.0 Sv. We use a 13-year eddy-resolving primitive-equation simulation to show that the presence of persistent meanders and eddies leads to characteristic quasi-steady Lagrangian transport patterns, aptly extracted through climatological Lagrangian Coherent Structures (cLCS). The cLCS position the surface expression of the BC core along the 2000-m isobath, in excellent visual agreement with high resolution satellite sea-surface temperature and the model Eulerian mean velocity. The cLCS deformation pattern also responds to zonally persistent cross-shelf SSH transition from positive (high) values near coastline to low (negative) values between 200- and 2000-m and back to positive (high) ofshore from the 2000-m isobath. Zonally-paired cyclonic and anticyclonic structures are embedded in this transition, also causing the cLCS to deform into chevrons. An efcient transport barrier is identifed close to the 200-m isobath confrmed by limited inshore movement of drogued drifters and accurately indicated by an along slope maxima of climatological strength of attraction. We also show that the persistent cyclonic and anticyclonic structures may induce localized cross-shelf transport. Regions of low climatological strength of attraction coincide with large shelves and with stagnant synthetic trajectories. We also show that cLCS accurately depict trajectories initiated at the location of Chevrons spill (November 2011) as compared to synthetic and satellite-tracked trajectories, and the outline of the oil from that accident. There is also an agreement between the large-scale oil slicks reaching the Brazilian beaches (from August 2019 to February 2020) and the strength of climatological attraction at the coast. Our work also clarifes the infuence of persistent mesoscale structures on the regional circulation. The identifcation and quantitative description of climatological Lagrangian coherent structures is expected to improve the efectiveness of future emergency response to oil spills, contingency planning, rescue operations, larval and fsh connectivity assessment, drifter launch strategies, waste pollutant and marine debris dispersion and destination.</abstract>
		<area>SRE</area>
		<language>en</language>
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