{"id":10408,"date":"2022-02-24T00:00:00","date_gmt":"2022-02-24T00:00:00","guid":{"rendered":"https:\/\/www.mercator-ocean.eu\/mercator-ocean-arcan36_sargassesmte\/"},"modified":"2022-02-24T00:00:00","modified_gmt":"2022-02-24T00:00:00","slug":"mercator-ocean-arcan36_sargassesmte","status":"publish","type":"post","link":"https:\/\/www.mercator-ocean.eu\/fr\/actualites\/mercator-ocean-arcan36_sargassesmte\/","title":{"rendered":"Echouage de Sargasses dans les Cara\u00efbes: Des donn\u00e9es oc\u00e9anique au secours de l&rsquo;environnement"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div><p style=\"text-align: left;\"><span data-contrast=\"none\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/sargasses.jpg\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignleft wp-image-25320 size-medium\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/sargasses-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" \/><\/a><\/span><\/p>\n<p>Mercator Oc\u00e9an International (MOi) dispose d&rsquo;une offre d&rsquo;expertise et de service de pointe pour l&rsquo;analyse et la pr\u00e9vision des oc\u00e9ans. R\u00e9cemment, il a d\u00e9velopp\u00e9 un syst\u00e8me r\u00e9gional haute r\u00e9solution couvrant les Cara\u00efbes, destin\u00e9 \u00e0 am\u00e9liorer la pr\u00e9vision des \u00e9chouages d&rsquo;algues sargasses pour le gouvernement fran\u00e7ais.<\/p>\n<p><span data-contrast=\"none\">La s<span style=\"color: #666666;\">ur<\/span><\/span><span style=\"color: #666666;\">abondanc<\/span><span data-contrast=\"none\"><span style=\"color: #666666;\">e<\/span>\u00a0\u00a0et l\u2019<span style=\"color: #666666;\">\u00e9chouage\u00a0de ces algues<\/span>\u00a0en particulier\u00a0cette derni\u00e8re d\u00e9cennie\u00a0sur les c\u00f4tes antillaises, d\u2019Am\u00e9rique centrale et du\u00a0Br\u00e9sil est un <span style=\"color: #666666;\">v\u00e9ritable fl\u00e9au<\/span>\u00a0engendrant\u00a0d\u2019importants probl\u00e8mes socio-\u00e9conomiques<\/span><span data-contrast=\"none\">, \u00e9cologique et sanitaire\u202f:\u00a0<\/span><span data-contrast=\"none\">les algues envahissent les plages les plus populaires, les ports et les baies, elles emp\u00eachent la navigation et la p\u00eache locale, et une fois \u00e9chou\u00e9es, elles d\u00e9gagent un gaz naus\u00e9abond toxique (\u00e0 base de sulfure d\u2019hydrog\u00e8ne et d\u2019amoniaque).<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><strong>Le gouvernement fran\u00e7ais a demand\u00e9 de l&rsquo;aide pour suivre et pr\u00e9voir la prolif\u00e9ration des sargasses.<\/strong><\/p>\n<p><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/Image1.png\"><img decoding=\"async\" class=\"alignleft wp-image-25307\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/Image1.png\" alt=\"\" width=\"453\" height=\"544\" \/><\/a><\/p>\n<p>En effet, <span data-contrast=\"none\">la France est impact\u00e9e en Martinique et en Guadeloupe et <\/span>M\u00e9t\u00e9o France a le mandat de surveiller la d\u00e9rive de la pollution dans ces zones. MOi soutient M\u00e9t\u00e9o France et fournit un mod\u00e8le de pr\u00e9vision global et un nouveau mod\u00e8le r\u00e9gional haute r\u00e9solution pour alimenter le mod\u00e8le de pollution de M\u00e9t\u00e9o France appel\u00e9 MOTHY (le m\u00eame protocole est appliqu\u00e9 ici que lorsque nous avons une pollution p\u00e9troli\u00e8re) <span data-contrast=\"none\">Dans le cadre d\u2019une convention de 18 mois sign\u00e9e le 23 Novembre 2020 avec le <span style=\"color: #666666;\">Minist\u00e8re de la Transition Ecologique<\/span> (<span style=\"color: #666666;\">MTE)<\/span>, MOi s\u2019engage \u00e0 fournir<\/span><span data-contrast=\"none\"> \u00e0 <span style=\"color: #666666;\">M\u00e9t\u00e9o France<\/span> des\u00a0<\/span><span data-contrast=\"none\">donn\u00e9es de courants de subsurface fiables et plus pr\u00e9cises sur la r\u00e9gion de l\u2019Arc Antillais, afin d\u2019am\u00e9liorer les pr\u00e9visions de d\u00e9rive des Sargasses et en particulier mieux anticiper les \u00e9pisodes d<\/span><span data-contrast=\"none\">\u2019\u00e9chouage<\/span><span data-contrast=\"none\">\u00a0massif\u00a0de ces algues\u00a0sur les c\u00f4tes de la Guadeloupe et de la Martinique.\u00a0<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">A partir de ces mod\u00e8les et diverses informations, M\u00e9t\u00e9o France d\u00e9livre un <a href=\"http:\/\/www.guadeloupe.developpement-durable.gouv.fr\/IMG\/pdf\/bulletin_sargasses_20210902_guadeloupe.pdf\"><span style=\"color: #0000ff;\"><strong>bulletin de pr\u00e9vision<\/strong><\/span><\/a> aux autorit\u00e9s locales de Guadeloupe et Martinique. Il permet de les alerter afin d\u2019anticiper les\u00a0risques\u00a0associ\u00e9s \u00e0 l\u2019arriv\u00e9e massive des algues.<\/span> La configuration r\u00e9gionale <span data-contrast=\"auto\"><span style=\"color: #0000ff;\"><span style=\"color: #666666;\">ARCAN36, r\u00e9cemment d\u00e9velopp\u00e9 par MOi,<\/span> <span style=\"color: #000000;\">permettra une<\/span> <span style=\"color: #666666;\">am\u00e9lioration des pr\u00e9visions de d\u00e9rives des radeaux de Sargasses, fournies au travers de ce bulletin<\/span><\/span><span style=\"color: #666666;\">.<\/span> <\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559685&quot;:720,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><strong>Qu&rsquo;est-ce que les sargasses ?<\/strong><\/p>\n<p><span data-contrast=\"none\">Le d\u00e9veloppement et la d\u00e9rive des <span style=\"color: #666666;\">algues Sargasses<\/span>\u00a0sont\u00a0au d\u00e9part\u00a0des\u00a0ph\u00e9nom\u00e8nes\u00a0naturels.\u00a0D\u00e9couvertes\u00a0par les grands\u00a0navigateurs\u00a0explorateurs\u00a0du XV\u00e8me si\u00e8cle, ces algues se concentraient\u00a0principalement\u00a0dans la mer dite des Sargasses se situant au\u00a0nord-ouest de l\u2019Atlantique\u00a0tropical et au nord des Antilles. Mais depuis\u00a02010, de grandes quantit\u00e9s de Sargasses\u00a0sont observ\u00e9es\u00a0des c<\/span><span data-contrast=\"none\">\u00f4<\/span><span data-contrast=\"none\">tes\u00a0ouest-africaines\u00a0jusqu\u2019au\u00a0Golfe du Mexique\u202f: on parle alors\u00a0de la\u00a0\u00ab<span style=\"color: #666666;\">Grande Ceinture des Sargasses\u202f<\/span>\u00bb (\u00ab\u202fThe Great Atlantic Sargassum Belt\u202f\u00bb,\u00a0<\/span><i><span data-contrast=\"none\">Wang et al., 2019<\/span><\/i><span data-contrast=\"none\">).<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p style=\"text-align: left;\"><strong>Pourquoi de grandes quantit\u00e9s de sargasses ont-elles \u00e9t\u00e9 rejet\u00e9es sur le rivage depuis 2010 ?<\/strong><\/p>\n<p style=\"text-align: left;\"><span data-contrast=\"none\">Plusieurs hypoth\u00e8ses sont possibles\u202f:<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\"><span style=\"color: #666666;\">L\u2019apport des nutriments<\/span> par l\u2019Amazone d\u00fb \u00e0 la d\u00e9forestation et \u00e0 l\u2019intensification de l\u2019agriculture en Amazonie, mais cette piste ne semble pas \u00e9vidente (<\/span><i><span data-contrast=\"auto\">Jouanno et al., 2021<\/span><\/i><span data-contrast=\"auto\">).<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" aria-setsize=\"-1\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">Le <span style=\"color: #666666;\">r\u00e9chauffement<\/span> de l\u2019Atlantique tropical.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" aria-setsize=\"-1\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\">Des changements de <span style=\"color: #666666;\">conditions hydrodynamiques<\/span>.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">Aucune de ces hypoth\u00e8ses n\u2019ont totalement \u00e9t\u00e9 explor\u00e9es pour le moment. C\u2019est probablement parce que la prolif\u00e9ration des Sargasses, leur formation et leur transport vers les Cara\u00efbes r\u00e9sultent de <span style=\"color: #666666;\">processus biologiques et hydrodynamiques toujours m\u00e9connus\u202f:<\/span><\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559685&quot;:720,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" aria-setsize=\"-1\" data-aria-posinset=\"4\" data-aria-level=\"1\"><span data-contrast=\"auto\">Peu d\u2019\u00e9tudes ont \u00e9t\u00e9 r\u00e9alis\u00e9es sur la physiologie des ces esp\u00e8ces et leur\u00a0r\u00e9ponse \u00e0 l\u2019environnement.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<ul>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" aria-setsize=\"-1\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Les vagues, le vent\u00a0et les courants affectent directement la d\u00e9rive des radeaux de Sargasses. L\u2019\u00a0\u00e9tendue\u00a0des radeaux, leur forme et leur \u00e9paisseur (pouvant atteindre les 10m)\u00a0jouent aussi un r\u00f4le dans leur d\u00e9rive.\u00a0Les mod\u00e8les de d\u00e9rive\u00a0devront\u00a0prendre en comptes au mieux ces diff\u00e9rents aspects.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"3\" aria-setsize=\"-1\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">Les Sargasses ont tendance\u00a0\u00e0 s\u2019aligner avec le vent sur des lignes de 10 \u00e0 100km de long et de 1 \u00e0 2 km de large. L\u2019am\u00e9lioration de nos connaissance\u00a0sur ces processus d\u2019agr\u00e9gation,\u00a0et leur prise en compte dans les mod\u00e8les num\u00e9riques\u00a0permettront\u00a0d\u2019obtenir\u00a0de meilleures pr\u00e9visions de d\u00e9rive\u00a0des algues.<\/span><span data-ccp-props=\"{&quot;134233279&quot;:true,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<p>Les autorit\u00e9s locales et nationales ont de plus en plus besoin de pr\u00e9voir les \u00e9chouages de sargasses afin de pouvoir r\u00e9agir aux cons\u00e9quences. Compte tenu de l&rsquo;\u00e9volution des conditions mondiales, des \u00ab\u00a0sc\u00e9narios hypoth\u00e9tiques\u00a0\u00bb sur les algues sargasses pourraient \u00eatre test\u00e9s dans un environnement num\u00e9rique. Par exemple, Mercator Oc\u00e9an pourrait ex\u00e9cuter \u00e0 la demande du gouvernement fran\u00e7ais de tels sc\u00e9narios dans un <a href=\"https:\/\/digitaltwinocean.mercator-ocean.eu\/\">jumeau num\u00e9rique de l&rsquo;oc\u00e9an (DTO)<\/a>. Cette duplication num\u00e9rique de l&rsquo;oc\u00e9an est un terrain d&rsquo;essai pr\u00e9cieux o\u00f9 les mod\u00e8les de sargasses pourraient \u00eatre int\u00e9gr\u00e9s, permettant aux autorit\u00e9s fran\u00e7aises, par exemple, de planifier \u00e0 l&rsquo;avance et de concevoir des strat\u00e9gies de lutte fond\u00e9es sur les donn\u00e9es.<\/p>\n<p><strong><span style=\"color: #666666;\">\u00c0 l&rsquo;ordre du jour des organismes internationaux et nationaux.\u00a0\u00a0<\/span><\/strong><\/p>\n<p><span data-contrast=\"none\">La Commission Oc\u00e9anique Inter-gouvernementale de l\u2019UNESCO (<a href=\"https:\/\/ioc.unesco.org\/\"><span style=\"color: #0000ff;\">IOC-UNESCO<\/span><\/a>) pour les Cara\u00efbes et les r\u00e9gions environnantes (IOCARIBE), son alliance r\u00e9gionale avec GOOS (<span style=\"color: #666666;\">IOCARIBE-GOOS<\/span>), et <a href=\"https:\/\/geoblueplanet.org\/\"><span style=\"color: #0000ff;\">GEO Blue Planet<\/span><\/a> travaillent avec des organisations partenaires et des parties prenantes pour d\u00e9velopper un syst\u00e8me d\u2019information et d\u2019alerte multirisque se focalisant d\u2019abord sur la d\u00e9rive de nappes de p\u00e9trole et la d\u00e9rive des Sargasses. MOi h\u00e9berge le secr\u00e9tariat europ\u00e9en de GEO Blue Planet, et dirige le<span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u00a0groupe de travail sur les sargasses. Voir<\/span> <\/span><a href=\"https:\/\/geoblueplanet.org\/blue-planet-activities\/sargassum-information-hub\/\">GEO Sargassum Hub<\/a>\u00a0\u00a0<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p><b>Comment fonctionne le mod\u00e8le?<\/b><\/p>\n<p><span data-contrast=\"none\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/nesting_sargasses.png\"><img decoding=\"async\" class=\"alignleft wp-image-25300 \" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2021\/11\/nesting_sargasses-259x300.png\" alt=\"\" width=\"382\" height=\"441\" \/><\/a><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span data-contrast=\"none\">Un moyen d\u2019atteindre de meilleurs scores de pr\u00e9vision de d\u00e9rive des radeaux de Sargasses\u00a0<\/span><span data-contrast=\"none\">est d\u2019am\u00e9liorer les mod\u00e8les de d\u00e9rive en prenant en compte certaines caract\u00e9ristiques hydrodynamiques.<\/span><\/p>\n<p><span data-contrast=\"none\">MOi livre jusqu\u2019\u00e0 pr\u00e9sent \u00e0 M\u00e9t\u00e9o-France\u00a0<\/span><span data-contrast=\"none\">les courants de subsurface (moyenn\u00e9s sur les 100 1ers m\u00e8tres et aussi sous la couche d\u2019Eckman) issus du mod\u00e8le global au 1\/12\u00b0 (GLO12), pour forcer le mod\u00e8le de d\u00e9rive MOTHY configur\u00e9 ici pour le suivi des Sargasses et permettant d\u2019obtenir des pr\u00e9visions \u00e0 court terme (typiquement 10j) de d\u00e9rive des algues sur les Antilles et la Guyane. Le for\u00e7age de MOTHY par des courants de subsurface de plus haute r\u00e9solution permettraient d\u2019am\u00e9liorer ces pr\u00e9visions. <\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p style=\"text-align: left;\"><span data-contrast=\"none\">Dans le cadre de la convention avec le MTE, MOi d\u00e9veloppe un mod\u00e8le r\u00e9gional au 1\/36\u00b0 de l&rsquo;Arc Carib\u00e9en, ARCAN36. Ce syst\u00e8me est forc\u00e9 par la mar\u00e9e. Les ph\u00e9nom\u00e8nes de basse fr\u00e9quence et de grande \u00e9chelle sont r\u00e9solus par GLO12 aux fronti\u00e8res. GLO12 assimile les observations satellitaires et in situ. ( il s&rsquo;agit d&rsquo;une m\u00e9thode dite de Spectral Nudging) <\/span><\/p>\n<p style=\"text-align: left;\"><span data-contrast=\"none\"><span style=\"color: #0000ff;\"><span style=\"color: #666666;\">Sylvain CAILLEAU, Oc\u00e9anographe \u00e0 MOi, et d\u00e9veloppeur de ce mod\u00e8le<\/span><\/span>, nous explique \u00ab\u00a0La configuration r\u00e9gionale appel\u00e9e <span style=\"color: #666666;\">ARC<\/span><\/span><span data-contrast=\"none\"><span style=\"color: #666666;\">AN36<\/span>, d\u2019abord d\u00e9velopp\u00e9e, test\u00e9e et valid\u00e9es en mode R&amp;D, est ensuite int\u00e9gr\u00e9e dans la chaine op\u00e9rationnelle afin de produire au final des pr\u00e9visions de courant \u00e0 10j pour M\u00e9t\u00e9o France. Avant la mise en production op\u00e9rationnelle, \u00e0 partir d\u2019une simulation de r\u00e9f\u00e9rence sur l\u2019ann\u00e9e 2019, MOi s\u2019est efforc\u00e9<\/span><span data-contrast=\"none\"> de montrer l\u2019apport de la haute r\u00e9solution en comparant les r\u00e9sultats obtenus par ARCAN36 et GLO12 sur les caract\u00e9ristiques hydrodynamiques de la r\u00e9gion de l\u2019Arc Antillais et par comparaison aux donn\u00e9es observ\u00e9es, issues principalement du Copernicus Marine Service.\u00a0\u00bb L&rsquo;\u00e9quipe MOi travaillant sur le mod\u00e8le ARCAN36 est compos\u00e9e de Sylvain Cailleau, Laurent Bessieres, Guillaume Reffray et Jean-Michel Lellouche.\u00a0<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\n<p>A MOi, ce travail permet de tester et d&rsquo;am\u00e9liorer la capacit\u00e9 interne \u00e0 mettre en place rapidement et efficacement un syst\u00e8me op\u00e9rationnel r\u00e9gional \u00e0 haute r\u00e9solution pour une r\u00e9gion donn\u00e9e et pour une application et un besoin particuliers.\u202fCe chantier permet de d\u00e9velopper des outils de diagnostic, de r\u00e9cup\u00e9rer et d&rsquo;adapter des outils existants, le tout int\u00e9gr\u00e9 dans une bo\u00eete \u00e0 outils de validation r\u00e9gionale document\u00e9e, h\u00e9berg\u00e9e dans gitlab, et accessible \u00e0 tous \u00e0 MOi.<\/p>\n<p><span style=\"color: #666666;\">Gr\u00e2ce \u00e0 ce projet, l&rsquo;objectif de MOi est de pouvoir d\u00e9ployer et valider facilement ce type de syst\u00e8me partout dans l&rsquo;oc\u00e9an mondial et pour de nombreuses autres applications.\u202f\u00a0<\/span><\/p>\n<p><span style=\"color: #666666;\"><strong>R\u00e9f\u00e9rences<\/strong><\/span><\/p>\n<p><span data-contrast=\"none\">Partenariat MOi avec l\u2019\u00e9quipe PREVIMAR de M\u00e9t\u00e9o-France<\/span><span data-contrast=\"none\">\u00a0(<\/span><span data-contrast=\"none\">interactions avec\u00a0Pierre Daniel\u00a0et\u00a0Denis Paradis).<\/span><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Partenariat de\u00a0MOi\u00a0dans le projet FORESEA<\/span><span data-contrast=\"none\">\u00a0(<\/span><span data-contrast=\"none\">interaction avec Julien\u00a0Jouanno\u00a0et L\u00e9o Berline)<\/span><span data-contrast=\"none\">.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Jouanno, J.,\u00a0Moquet, J. S., Berline, L.,\u00a0Radenac, M. H., Santini, W., Changeux, T., Thibaut, T.,\u00a0Podlejski, W., Menard, F., Mart\u00ednez, J.M., Aumont, O., Sheinbaum, J.,\u00a0Filizola, N., and\u00a0N&rsquo;Kaya, G. D. M.: Evolution of the riverine nutrient export to the Tropical Atlantic over the last 15 years: is there a link with Sargassum\u00a0proliferation?,<\/span><span data-contrast=\"none\">\u00a0<\/span><i><span data-contrast=\"none\">Environ.\u00a0Res. Lett., 16, 034042, https:\/\/doi.org\/10.1088\/1748-9326\/abe11a, 2021.<\/span><\/i><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Wang, M., Hu, C., Barnes, B. B., Mitchum, G., Lapointe, B., and Montoya, J. P.: The great Atlantic Sargassum belt,\u00a0<\/span><i><span data-contrast=\"none\">Science, 365, 83\u201387, 2019<\/span><\/i><span data-contrast=\"none\">.<\/span><span data-contrast=\"none\">\u2002<\/span><span data-ccp-props=\"{&quot;469777462&quot;:,&quot;469777927&quot;:,&quot;469777928&quot;:}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Mercator Oc\u00e9an International (MOi) dispose d&rsquo;une offre d&rsquo;expertise et de service de pointe pour l&rsquo;analyse et la pr\u00e9vision des oc\u00e9ans. R\u00e9cemment, il a d\u00e9velopp\u00e9 un syst\u00e8me r\u00e9gional haute r\u00e9solution couvrant les Cara\u00efbes, destin\u00e9 \u00e0 am\u00e9liorer la pr\u00e9vision des \u00e9chouages d&rsquo;algues sargasses pour le gouvernement fran\u00e7ais. La surabondance\u00a0\u00a0et l\u2019\u00e9chouage\u00a0de ces algues\u00a0en particulier\u00a0cette derni\u00e8re d\u00e9cennie\u00a0sur les c\u00f4tes [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":7071,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"translation-status":[],"class_list":["post-10408","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Echouage de Sargasses dans les Cara\u00efbes: Des donn\u00e9es oc\u00e9anique au secours de l&#039;environnement - Mercator Ocean International<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mercator-ocean.eu\/fr\/actualites\/mercator-ocean-arcan36_sargassesmte\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Echouage de Sargasses dans les Cara\u00efbes: Des donn\u00e9es oc\u00e9anique au secours de l&#039;environnement - Mercator Ocean International\" \/>\n<meta property=\"og:description\" content=\"Mercator Oc\u00e9an International (MOi) dispose d&rsquo;une offre d&rsquo;expertise et de service de pointe pour l&rsquo;analyse et la pr\u00e9vision des oc\u00e9ans. R\u00e9cemment, il a d\u00e9velopp\u00e9 un syst\u00e8me r\u00e9gional haute r\u00e9solution couvrant les Cara\u00efbes, destin\u00e9 \u00e0 am\u00e9liorer la pr\u00e9vision des \u00e9chouages d&rsquo;algues sargasses pour le gouvernement fran\u00e7ais. La surabondance\u00a0\u00a0et l\u2019\u00e9chouage\u00a0de ces algues\u00a0en particulier\u00a0cette derni\u00e8re d\u00e9cennie\u00a0sur les c\u00f4tes [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mercator-ocean.eu\/fr\/actualites\/mercator-ocean-arcan36_sargassesmte\/\" \/>\n<meta property=\"og:site_name\" content=\"Mercator Ocean International\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/MercatorOcean\" \/>\n<meta property=\"article:published_time\" content=\"2022-02-24T00:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2024\/03\/FORSEA.png\" \/>\n\t<meta property=\"og:image:width\" content=\"355\" \/>\n\t<meta property=\"og:image:height\" content=\"438\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Damien Goubeau\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@MercatorOcean\" \/>\n<meta name=\"twitter:site\" content=\"@MercatorOcean\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Damien Goubeau\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/\"},\"author\":{\"name\":\"Damien Goubeau\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/#\\\/schema\\\/person\\\/8707759d6e2641e91ea76ae3fc537134\"},\"headline\":\"Echouage de Sargasses dans les Cara\u00efbes: Des donn\u00e9es oc\u00e9anique au secours de l&rsquo;environnement\",\"datePublished\":\"2022-02-24T00:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/\"},\"wordCount\":1621,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/wp-content\\\/uploads\\\/2024\\\/03\\\/FORSEA.png\",\"articleSection\":[\"Actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/\",\"url\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/actualites\\\/mercator-ocean-arcan36_sargassesmte\\\/\",\"name\":\"Echouage de Sargasses dans les Cara\u00efbes: Des donn\u00e9es oc\u00e9anique au secours de l'environnement - 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