{"id":10260,"date":"2018-08-23T00:00:00","date_gmt":"2018-08-23T00:00:00","guid":{"rendered":"https:\/\/www.mercator-ocean.eu\/eau-de-mer-en-bretagne\/"},"modified":"2018-08-23T00:00:00","modified_gmt":"2018-08-23T00:00:00","slug":"eau-de-mer-en-bretagne","status":"publish","type":"post","link":"https:\/\/www.mercator-ocean.eu\/fr\/eau-de-mer-en-bretagne\/","title":{"rendered":"L\u2019eau de mer est tr\u00e8s chaude en Bretagne cet \u00e9t\u00e9\u2026 et sur votre plage\u2009?"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div><section class=\"chapo\">\n<figure id=\"attachment_16305\" aria-describedby=\"caption-attachment-16305\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-16305\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2018\/08\/c70720db332a12380ece8f043c0fd464-carte-l-eau-de-mer-etait-tres-chaude-en-bretagne-cet-ete-et-sur-votre-plage-300x170.jpg\" alt=\"\" width=\"500\" height=\"283\" \/><figcaption id=\"caption-attachment-16305\" class=\"wp-caption-text\">La mer a \u00e9t\u00e9 particuli\u00e8rement chaude dans le Morbihan, comme ici \u00e0 Larmor-Plage. (ILLUSTRATION) | THIERRY CREUX \/ OUEST FRANCE<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<\/section>\n<p>Vous l\u2019aviez peut-\u00eatre remarqu\u00e9 mais c\u2019est d\u00e9sormais prouv\u00e9\u2009: l\u2019eau de mer \u00e9tait plus chaude cette ann\u00e9e en Bretagne. Jusqu\u2019\u00e0 3,5\u2009\u00b0C en plus durant le mois de juillet dans le golfe du Morbihan par exemple. Comment explique-t-on de telles diff\u00e9rences par rapport aux moyennes habituelles\u2009?<\/p>\n<section class=\"contenu-article clearfix\">M\u00eame si le\u00a0mauvais temps est de retour\u00a0ces derniers jours, l\u2019\u00e9t\u00e9 2018 a \u00e9t\u00e9 beau en Bretagne. Un ensoleillement qui a visiblement eu un impact sur la chaleur de la mer. En Bretagne, notamment en juillet, des relev\u00e9s exceptionnels ont \u00e9t\u00e9 enregistr\u00e9s comme l\u2019illustre notre carte ci-dessous.<\/section>\n<p>&nbsp;<\/p>\n<section class=\"contenu-article clearfix\"><a href=\"https:\/\/www.ouest-france.fr\/economie\/tourisme\/carte-l-eau-de-mer-etait-tres-chaude-en-bretagne-cet-ete-et-sur-votre-plage-5918003\"><img decoding=\"async\" class=\"alignleft wp-image-16309\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2018\/08\/carte-mer-bretagne-juin-juillet-aout-2018.png\" alt=\"\" width=\"500\" height=\"387\" \/><\/a><\/section>\n<p><a href=\"https:\/\/www.ouest-france.fr\/economie\/tourisme\/carte-l-eau-de-mer-etait-tres-chaude-en-bretagne-cet-ete-et-sur-votre-plage-5918003\" target=\"_blank\" rel=\"noopener noreferrer\">S\u00e9lectionnez le mois que vous souhaitez analyser<\/a> &#8211; juin, juillet ou ao\u00fbt &#8211; et regardez o\u00f9 se situent les plages bretonnes les plus chaudes \u00e0 cette p\u00e9riode. Plus le cercle est large et rouge, plus l\u2019\u00e9cart de temp\u00e9rature entre 2018 et la moyenne saisonni\u00e8re est large. Cliquez sur le cercle de votre plage pour comparer les chiffres de cet \u00e9t\u00e9 \u00e0 la moyenne saisonni\u00e8re.<\/p>\n<section class=\"contenu-article clearfix\">Les experts du\u00a0<a href=\"https:\/\/www.mercator-ocean.eu\/en\/news\/2018-summer-sea-surface-temperatures-western-europe\/\">Mercator Oc\u00e9an<\/a>\u00a0&#8211; une soci\u00e9t\u00e9 sp\u00e9cialis\u00e9e dans l\u2019analyse des oc\u00e9ans associ\u00e9e \u00e0 M\u00e9t\u00e9o France\u2009\u2013\u2009voient deux raisons principales au r\u00e9chauffement des eaux en juillet\u2009:\u00a0<strong>\u00ab\u2009Un ensoleillement plus fort qu\u2019\u00e0 l\u2019accoutum\u00e9e sur une majeure partie des c\u00f4tes fran\u00e7aises\u2009\u00bb et\u00a0<\/strong><strong>\u00ab\u2009des vents plus faibles donc  moins de m\u00e9langes avec les eaux plus profondes et plus froides\u2009\u00bb.<\/strong><\/p>\n<h2><\/h2>\n<\/section>\n<h2><\/h2>\n<p>&nbsp;<\/p>\n<section class=\"contenu-article clearfix\">\n<h2>Le golfe du Morbihan en \u00e9bullition\u2009: pourquoi\u2009?<\/h2>\n<p>Sur notre carte, on s\u2019aper\u00e7oit que l\u2019eau a \u00e9t\u00e9 particuli\u00e8rement chaude sur la c\u00f4te sud de la Bretagne, notamment dans le golfe du Morbihan. \u00c0 Belle-\u00cele-en-Mer, on a fr\u00f4l\u00e9 les 21\u2009\u00b0C de moyenne sur le mois de juillet. D\u2019habitude, la moyenne saisonni\u00e8re ne d\u00e9passe pas les 17,5\u2009\u00b0C\u2009! M\u00eame constat \u00e0 Vannes o\u00f9 d\u00e8s le mois de juin, on enregistrait 2\u2009\u00b0C de plus que la moyenne habituelle. Le mois suivant, c\u2019\u00e9tait trois degr\u00e9s d\u2019\u00e9cart\u2009!<\/p>\n<div class=\"tag-html\"><\/div>\n<p>Des chiffres qui n\u2019\u00e9tonnent pas Philippe Bleuse, directeur de la pr\u00e9vision \u00e0 M\u00e9t\u00e9o France Ouest.\u00a0<strong>\u00ab\u2009Dans le golfe du Morbihan, l\u2019eau est moins profonde que dans le reste de la r\u00e9gion. C\u2019est ce qui explique que ce soit l\u00e0 qu\u2019on y trouve les temp\u00e9ratures les plus \u00e9lev\u00e9es\u2009\u00bb<\/strong>.<\/p>\n<h2><\/h2>\n<h2>La Manche et le golfe de Gascogne \u00e9galement touch\u00e9s<\/h2>\n<p>De mani\u00e8re g\u00e9n\u00e9rale, les eaux bretonnes ont \u00e9t\u00e9 plus chaudes que d\u2019ordinaire,\u00a0<strong>\u00ab\u2009entre 1 et 2\u2009\u00b0C suppl\u00e9mentaires\u2009\u00bb<\/strong>\u00a0d\u2019apr\u00e8s le sp\u00e9cialiste de M\u00e9t\u00e9o France. Mercator Oc\u00e9an \u00e9tend m\u00eame le ph\u00e9nom\u00e8ne au\u00a0<strong>\u00ab\u2009golfe de Gascogne et \u00e0 la Manche. Cela n\u2019est par contre pas le cas sur les c\u00f4tes m\u00e9diterran\u00e9ennes o\u00f9 juillet 2015 et\u00a02016 ont \u00e9t\u00e9, en moyenne, plus chauds.\u2009\u00bb<\/strong><\/p>\n<figure id=\"attachment_16306\" aria-describedby=\"caption-attachment-16306\" style=\"width: 700px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.mercator-ocean.eu\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" class=\"wp-image-16306\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2018\/08\/2242a18a1ee5bbdaab90357a697783a5-carte-la-mer-ete-plus-chaude-en-bretagne-cet-ete-decouvrez-les-temperatures-de-votre-plage.jpg\" alt=\"\" width=\"700\" height=\"587\" \/><\/a><figcaption id=\"caption-attachment-16306\" class=\"wp-caption-text\">Les diff\u00e9rences des maximums de temp\u00e9rature de surface de la mer du mois de juillet 2018 par rapport \u00e0 la p\u00e9riode 2007\/2017. | Mercator Ocean<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<h2>Un impact sur la faune et la flore\u2009?<\/h2>\n<div id=\"divVideoStepAdTop\" class=\"divVideoStep rs_skip\">\n<div id=\"divMosaic+4jq1o0ki\" class=\"ivbsGeneral\">\n<div id=\"divVideoFormatEmbedCodeContainerVS+0+4jq1o0ki\" data-integralas-id-87996b4b-4606-5017-255d-44531ac34af9=\"\">\n<div class=\"ivbsDescription\">\n<p>Choisissez parmi nos meilleurs produits, toujours \u00e0 petit prix.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>M\u00eame si ce n\u2019est pas son domaine d\u2019expertise, Philippe Bleuse de M\u00e9t\u00e9o France pense que la hausse des temp\u00e9ratures de l\u2019eau n\u2019a pas eu d\u2019effet sur la faune et la flore locale.\u00a0<strong>\u00ab\u2009A priori, un \u00e9pisode de chaleur d\u2019aussi court terme n\u2019a pas d\u2019impact n\u00e9gatif en Bretagne. En revanche,\u00a0<a href=\"https:\/\/www.ouest-france.fr\/environnement\/30-des-coraux-de-la-grande-barriere-australienne-sont-morts-5707512\">dans certains massifs coralliens<\/a>\u00a0tropicaux, une hausse de la temp\u00e9rature de quelques degr\u00e9s peut avoir d\u2019\u00e9normes cons\u00e9quences\u2009\u00bb<\/strong>.<\/p>\n<p>Sur notre carte, on note que le d\u00e9but du mois d\u2019ao\u00fbt est beaucoup moins spectaculaire que juillet ou juin. Parce qu\u2019il fait moins chaud\u2009?\u00a0<strong>\u00ab\u2009Non, il ne faut pas confondre la temp\u00e9rature de l\u2019air et l\u2019ensoleillement\u2009\u00bb<\/strong>\u00a0rappelle le directeur pr\u00e9vision de M\u00e9t\u00e9o France Ouest. Le vent, de retour notamment sur la c\u00f4te nord, est davantage responsable.<\/p>\n<h2>Diff\u00e9rentes mani\u00e8res de relever la temp\u00e9rature de l\u2019eau<\/h2>\n<p>Les donn\u00e9es de notre carte proviennent de\u00a0<a href=\"https:\/\/developer.worldweatheronline.com\/\">WorldWeatherOnline<\/a>. Elles sont arr\u00eat\u00e9es au\u00a010\u00a0ao\u00fbt.\u00a0Attention\u2009: certains points de la carte peuvent correspondre \u00e0 des communes non situ\u00e9es sur le littoral. C\u2019est parce qu\u2019ils indiquent le nom de la station de WorldWeatherOnline, parfois \u00e9loign\u00e9e de la mer.<\/p>\n<p>Les moyennes se basent sur les relev\u00e9s des 10 derni\u00e8res ann\u00e9es.\u00a0<strong>\u00ab\u2009\u00c0 noter qu\u2019il s\u2019agit de la mesure de la temp\u00e9rature de surface de l\u2019eau, par satellite, et non de relev\u00e9s effectu\u00e9s localement\u2009\u00bb<\/strong>\u00a0indique Tony Samson, qui travaille pour\u00a0<a href=\"https:\/\/www.cabaigne.net\/\">cabaigne.net<\/a>, un site qui exploite ces donn\u00e9es m\u00e9t\u00e9orologiques.<\/p>\n<p>Il existe\u00a0<a href=\"https:\/\/actu.fr\/bretagne\/saint-cast-le-guildo_22282\/temperature-leau-pourquoi-t-15-c-difference-entre-plages-saint-cast-plevenon_11603586.html\">diff\u00e9rentes fa\u00e7ons de relever la temp\u00e9rature<\/a>. Au large et en profondeur, comme peuvent le faire les bou\u00e9es instrument\u00e9es de M\u00e9t\u00e9o France. Ou encore en s\u2019immergeant jusqu\u2019\u00e0 la taille, comme peut le faire le personnel de la SNSM. Probl\u00e8me avec cette technique\u2009: la temp\u00e9rature varie tr\u00e8s vite, \u00e0 cause du vent, de la mar\u00e9e\u2026 Et le r\u00e9sultat final n\u2019est donc pas toujours fiable.<\/p>\n<p>Article d&rsquo;origine :\u00a0<a href=\"https:\/\/www.ouest-france.fr\/economie\/tourisme\/carte-l-eau-de-mer-etait-tres-chaude-en-bretagne-cet-ete-et-sur-votre-plage-5918003\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.ouest-france.fr\/economie\/tourisme\/carte-l-eau-de-mer-etait-tres-chaude-en-bretagne-cet-ete-et-sur-votre-plage-5918003<\/a><\/p>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; Vous l\u2019aviez peut-\u00eatre remarqu\u00e9 mais c\u2019est d\u00e9sormais prouv\u00e9\u2009: l\u2019eau de mer \u00e9tait plus chaude cette ann\u00e9e en Bretagne. Jusqu\u2019\u00e0 3,5\u2009\u00b0C en plus durant le mois de juillet dans le golfe du Morbihan par exemple. Comment explique-t-on de telles diff\u00e9rences par rapport aux moyennes habituelles\u2009? M\u00eame si le\u00a0mauvais temps est de retour\u00a0ces derniers jours, l\u2019\u00e9t\u00e9 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6781,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[38],"tags":[],"translation-status":[],"class_list":["post-10260","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-on-parle-de-nous"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>L\u2019eau de mer est tr\u00e8s chaude en Bretagne cet \u00e9t\u00e9\u2026 et sur votre plage\u2009? - 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\/eau-de-mer-en-bretagne\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019eau de mer est tr\u00e8s chaude en Bretagne cet \u00e9t\u00e9\u2026 et sur votre plage\u2009? - Mercator Ocean International\" \/>\n<meta property=\"og:description\" content=\"&nbsp; Vous l\u2019aviez peut-\u00eatre remarqu\u00e9 mais c\u2019est d\u00e9sormais prouv\u00e9\u2009: l\u2019eau de mer \u00e9tait plus chaude cette ann\u00e9e en Bretagne. Jusqu\u2019\u00e0 3,5\u2009\u00b0C en plus durant le mois de juillet dans le golfe du Morbihan par exemple. Comment explique-t-on de telles diff\u00e9rences par rapport aux moyennes habituelles\u2009? M\u00eame si le\u00a0mauvais temps est de retour\u00a0ces derniers jours, l\u2019\u00e9t\u00e9 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mercator-ocean.eu\/fr\/eau-de-mer-en-bretagne\/\" \/>\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=\"2018-08-23T00:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2024\/03\/image-ouest-france.png\" \/>\n\t<meta property=\"og:image:width\" content=\"728\" \/>\n\t<meta property=\"og:image:height\" content=\"338\" \/>\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=\"5 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\\\/eau-de-mer-en-bretagne\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/\"},\"author\":{\"name\":\"Damien Goubeau\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/#\\\/schema\\\/person\\\/8707759d6e2641e91ea76ae3fc537134\"},\"headline\":\"L\u2019eau de mer est tr\u00e8s chaude en Bretagne cet \u00e9t\u00e9\u2026 et sur votre plage\u2009?\",\"datePublished\":\"2018-08-23T00:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/\"},\"wordCount\":925,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/wp-content\\\/uploads\\\/2024\\\/03\\\/image-ouest-france.png\",\"articleSection\":[\"On parle de nous\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/\",\"url\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/eau-de-mer-en-bretagne\\\/\",\"name\":\"L\u2019eau de mer est tr\u00e8s chaude en Bretagne cet \u00e9t\u00e9\u2026 et sur votre plage\u2009? 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