{"id":290421,"date":"2023-07-20T12:52:54","date_gmt":"2023-07-20T11:52:54","guid":{"rendered":"https:\/\/realites.com.tn\/fr\/?p=290421"},"modified":"2023-07-20T12:53:05","modified_gmt":"2023-07-20T11:53:05","slug":"canicule-la-mediterranee-a-4c-au-dessus-des-normales","status":"publish","type":"post","link":"https:\/\/realites.com.tn\/fr\/canicule-la-mediterranee-a-4c-au-dessus-des-normales\/","title":{"rendered":"Canicule\u00a0: La M\u00e9diterran\u00e9e \u00e0 4\u00b0C au-dessus des normales"},"content":{"rendered":"<p>La M\u00e9diterran\u00e9e, berceau de civilisations mill\u00e9naires, fait face \u00e0 une menace grandissante : les canicules marines. Les \u00e9pisodes de chaleur intense, touchant certaines zones du bassin m\u00e9diterran\u00e9en, font grimper les temp\u00e9ratures locales jusqu&rsquo;\u00e0 atteindre les 30\u00b0C, soit 4\u00b0C au-dessus des normales. \u00a0Rapport\u00e9e par Thibault Guinaldo, chercheur en oc\u00e9anographie spatiale au Centre d\u2019\u00e9tudes en m\u00e9t\u00e9orologie satellitaire de Lannion, en France, la hausse alarmante met en p\u00e9ril l&rsquo;\u00e9quilibre fragile des \u00e9cosyst\u00e8mes marins qui \u00e9voluent dans ses eaux cristallines. Mais au-del\u00e0 de la M\u00e9diterran\u00e9e, les oc\u00e9ans du monde tout entier sont \u00e9galement touch\u00e9s, avec des cons\u00e9quences d\u00e9sastreuses pour la biodiversit\u00e9 marine.<br \/>\n<span style=\"font-family: Raleway, sans-serif;font-weight: bold;letter-spacing: 0px\">Des \u00e9cosyst\u00e8mes marins sous pression<br \/>\n<\/span>Par ailleurs, le climatologue Roland S\u00e9f\u00e9rian, du Centre national de recherches m\u00e9t\u00e9orologiques \u00e0 Toulouse, avertit que cela peut entra\u00eener des effondrements de population ou des d\u00e9placements d&rsquo;esp\u00e8ces vers des eaux plus froides. Les canicules marines survenues entre 2015 et 2019 en M\u00e9diterran\u00e9e ont d\u00e9j\u00e0 affect\u00e9 une cinquantaine d&rsquo;esp\u00e8ces, comme les coraux, les gorgones, les oursins, les mollusques, les bivalves et les posidonies, provoquant des mortalit\u00e9s massives jusqu&rsquo;\u00e0 45 m\u00e8tres de profondeur. Une situation dramatique qui soul\u00e8ve de nombreuses interrogations sur l&rsquo;avenir des \u00e9cosyst\u00e8mes marins.<br \/>\n<span style=\"font-family: Raleway, sans-serif;font-weight: bold;letter-spacing: 0px\">Une tendance alarmante \u00e0 l&rsquo;\u00e9chelle mondiale<br \/>\n<\/span>Il sied de souligner que les donn\u00e9es les plus r\u00e9centes r\u00e9v\u00e8lent que, en juillet, 44% des oc\u00e9ans sont touch\u00e9s par ces vagues de chaleur, ce qui constitue un record depuis 1991. Selon les pr\u00e9visions de l\u2019Administration oc\u00e9anographique am\u00e9ricaine, cette proportion pourrait m\u00eame atteindre 50% d&rsquo;ici \u00e0 septembre-octobre. Une alarmante tendance qui appelle \u00e0 une r\u00e9flexion urgente sur les cons\u00e9quences de ces canicules marines.<br \/>\n<span style=\"font-family: Raleway, sans-serif;font-weight: bold;letter-spacing: 0px\">L&rsquo;augmentation des temp\u00e9ratures oc\u00e9aniques<br \/>\n<\/span>L&rsquo;augmentation des temp\u00e9ratures dans les oc\u00e9ans est ind\u00e9niable : la temp\u00e9rature globale des eaux atteint actuellement environ 21\u00b0C, se rapprochant ainsi du record absolu de 21,1\u00b0C. L&rsquo;Atlantique Nord est particuli\u00e8rement touch\u00e9, avec des temp\u00e9ratures de 24,5\u00b0C, et ces canicules persistent depuis fin mai, notamment dans le golfe de Gascogne et au large du Portugal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La M\u00e9diterran\u00e9e, berceau de civilisations mill\u00e9naires, fait face \u00e0 une menace grandissante : les canicules marines. Les \u00e9pisodes de chaleur intense, touchant certaines zones du bassin m\u00e9diterran\u00e9en, font grimper les&hellip;<\/p>\n","protected":false},"author":81,"featured_media":290433,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4,2508],"tags":[],"class_list":["post-290421","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-environnement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Canicule\u00a0: La M\u00e9diterran\u00e9e \u00e0 4\u00b0C au-dessus des normales - R\u00e9alit\u00e9s Magazine<\/title>\n<meta name=\"description\" content=\"La M\u00e9diterran\u00e9e, berceau de civilisations mill\u00e9naires, fait face \u00e0 une menace grandissante : les canicules marines. 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