{"id":23179,"date":"2026-01-20T13:23:50","date_gmt":"2026-01-20T13:23:50","guid":{"rendered":"https:\/\/www.mercator-ocean.eu\/?post_type=press-release&#038;p=23179"},"modified":"2026-01-21T09:55:51","modified_gmt":"2026-01-21T09:55:51","slug":"2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993","status":"publish","type":"press-release","link":"https:\/\/www.mercator-ocean.eu\/fr\/press-release\/2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993\/","title":{"rendered":"Malgr\u00e9 le d\u00e9but de La Ni\u00f1a, 2025 figure parmi les trois ann\u00e9es les plus chaudes pour l\u2019oc\u00e9an depuis 1993"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"23179\" class=\"elementor elementor-23179 elementor-23088\" data-elementor-post-type=\"press-release\">\n\t\t\t\t<div class=\"elementor-element elementor-element-57f3a16 e-flex e-con-boxed e-con e-parent\" data-id=\"57f3a16\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0f0e5d2 elementor-widget elementor-widget-text-editor\" data-id=\"0f0e5d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><span data-contrast=\"none\">Toulouse, France, 21 janvier 2026 <\/span><\/b><b><span data-contrast=\"none\">\u2013\u00a0Malgr\u00e9 l\u2019amorce\u00a0d&rsquo;une phase\u00a0La\u00a0Ni\u00f1a,\u00a0g\u00e9n\u00e9ralement\u00a0associ\u00e9e \u00e0\u00a0un effet\u00a0de refroidissement\u00a0\u00e0 l\u2019\u00e9chelle mondiale,\u00a0l\u2019ann\u00e9e\u00a02025\u00a0figure parmi les trois ann\u00e9es les plus chaudes jamais\u00a0observ\u00e9es pour\u00a0l&rsquo;\u00a0oc\u00e9an\u00a0global, selon\u00a0les analyses de\u00a0Mercator\u00a0Ocean\u00a0International.\u00a0<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-contrast=\"none\">Dans le prolongement\u00a0des r\u00e9centes conclusions sur le climat\u00a0confirmant que 2025\u00a0compte\u00a0parmi les ann\u00e9es les plus chaudes jamais enregistr\u00e9es\u00a0\u00e0 l\u2019\u00e9chelle plan\u00e9taire, Mercator\u00a0Ocean\u00a0International, l&rsquo;entit\u00e9 charg\u00e9e de l\u2019exploitation du\u00a0service\u00a0Copernicus\u00a0Marine de l&rsquo;UE,\u00a0met en \u00e9vidence le maintien de temp\u00e9ratures oc\u00e9aniques\u00a0exceptionnellement\u00a0\u00e9lev\u00e9es\u00a0tout au long de l&rsquo;ann\u00e9e.\u00a02025\u00a0s\u2019impose\u00a0ainsi\u00a0comme\u00a0l&rsquo;ann\u00e9e la plus chaude jamais observ\u00e9e\u00a0pour l\u2019oc\u00e9an\u00a0dans des conditions\u00a0actuelles\u00a0de\u00a0La\u00a0Ni\u00f1a\u00a0depuis le d\u00e9but des\u00a0observations\u00a0en 1993.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-contrast=\"none\">Ces r\u00e9sultats\u00a0s\u2019appuient\u00a0sur les syst\u00e8mes op\u00e9rationnels de\u00a0pr\u00e9vision\u00a0oc\u00e9anique de Mercator\u00a0Ocean, qui fournissent des analyses d\u00e9taill\u00e9es\u00a0sur\u00a0l&rsquo;\u00e9tat de\u00a0l\u2019oc\u00e9an\u00a0\u00e0 l&rsquo;\u00e9chelle mondiale.\u00a0<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">R\u00e9capitulatif des\u00a0chiffres cl\u00e9s pour 2025<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">Temp\u00e9rature de surface de l\u2019oc\u00e9an global (SST) : 20,80 \u00b1 0,12\u202f\u00b0C<\/span><\/b><span data-contrast=\"auto\">, 2025, 3\u1d49\u00a0ann\u00e9e la plus chaude depuis le d\u00e9but des relev\u00e9s.\u00a081 % de l\u2019oc\u00e9an au-dessus de la moyenne des temp\u00e9ratures.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">La\u00a0Ni\u00f1a<\/span><\/b><span data-contrast=\"auto\">\u00a0: 2025 est\u00a0l\u2019ann\u00e9e\u00a0La\u00a0Ni\u00f1a\u00a0la plus chaude jamais enregistr\u00e9e.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"3\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">Atlantique Nord : SST moyenne 22,42 \u00b1 0,18\u202f\u00b0C<\/span><\/b><span data-contrast=\"auto\">;\u00a02025, 6\u1d49\u00a0ann\u00e9e la plus chaude sur 33 ans ; 69 % du bassin dans les 10 ann\u00e9es les plus chaudes.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"4\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">M\u00e9diterran\u00e9e : SST moyenne 21,21 \u00b1 0,07\u202f\u00b0C<\/span><\/b><span data-contrast=\"auto\">;\u00a02025, 2\u1d49\u00a0ann\u00e9e la plus chaude ; 98 % du bassin au-dessus de la moyenne, dont 25 % au moins 1\u00b0C au-dessus.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"5\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">Canicules marines : 89 % de l\u2019oc\u00e9an mondial affect\u00e9<\/span><\/b><span data-contrast=\"auto\">\u00a0; 97 % de l\u2019Atlantique Nord et 99,6 % de la M\u00e9diterran\u00e9e. Juin 2025 en M\u00e9diterran\u00e9e : 64 % du bassin simultan\u00e9ment impact\u00e9, un record pour un mois de juin.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"21\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"6\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">Glace de mer<\/span><\/b><span data-contrast=\"auto\">\u00a0: l\u2019\u00e9tendue de la glace de mer est rest\u00e9e inf\u00e9rieure \u00e0 la moyenne de long terme dans l\u2019Arctique et l\u2019Antarctique ; un minimum record a \u00e9t\u00e9 atteint en Arctique en d\u00e9cembre, tandis que la banquise antarctique hivernale figure parmi les plus faibles jamais observ\u00e9es.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f4df83c e-flex e-con-boxed e-con e-parent\" data-id=\"f4df83c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7330f1a elementor-widget elementor-widget-image\" data-id=\"7330f1a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--1024x1024.png\" class=\"attachment-large size-large wp-image-23129\" alt=\"\" srcset=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--1024x1024.png 1024w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--300x300.png 300w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--150x150.png 150w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--768x768.png 768w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--1536x1536.png 1536w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Daily-SST-global-ocean-1991-2025--2048x2048.png 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8c1dd65 e-flex e-con-boxed e-con e-parent\" data-id=\"8c1dd65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-572f9d0 elementor-widget elementor-widget-text-editor\" data-id=\"572f9d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><span class=\"TextRun SCXW53903068 BCX8\" lang=\"FR-FR\" xml:lang=\"FR-FR\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW53903068 BCX8\">Temp\u00e9ratures quotidiennes moyennes \u00e0 la surface de la mer pour l&rsquo;ensemble des oc\u00e9ans (entre 60\u00b0S et 60\u00b0N) entre 1991 et 2025. Donn\u00e9es : Initiative sur le changement climatique de l&rsquo;ESA\/GLO12.<\/span><span class=\"NormalTextRun SCXW53903068 BCX8\">\u00a0Cr\u00e9dit :\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW53903068 BCX8\">Copernicus<\/span><span class=\"NormalTextRun SCXW53903068 BCX8\">\u00a0Marine Service\/Mercator Oc\u00e9an International.<\/span><\/span><span class=\"EOP SCXW53903068 BCX8\" data-ccp-props=\"{}\">\u00a0<\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-92a370c e-flex e-con-boxed e-con e-parent\" data-id=\"92a370c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cf344df elementor-widget elementor-widget-text-editor\" data-id=\"cf344df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><span data-contrast=\"none\">La chaleur contenue dans les oc\u00e9ans atteint un nouveau record<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">\u00ab\u00a0<\/span><i><span data-contrast=\"auto\">En 2025, la chaleur contenue dans l\u2019oc\u00e9an a atteint son niveau le plus \u00e9lev\u00e9 jamais enregistr\u00e9, confirmant l\u2019accumulation continue de chaleur li\u00e9e au r\u00e9chauffement climatique<\/span><\/i><span data-contrast=\"auto\">\u00a0\u00bb,,\u00a0a d\u00e9clar\u00e9\u00a0<\/span><b><span data-contrast=\"auto\">Karina Von\u00a0Schuckmann, conseill\u00e8re principale chez Mercator\u00a0Ocean\u00a0et co-auteure d&rsquo;une nouvelle \u00e9tude internationale sur\u00a0<\/span><\/b><span data-contrast=\"auto\">le contenu thermique de l\u2019oc\u00e9an\u00a0[<\/span><i><span data-contrast=\"auto\">Ocean\u00a0Heat Content Sets\u00a0Another\u00a0Record in 2025<\/span><\/i><span data-contrast=\"auto\">,<\/span><i><span data-contrast=\"auto\">\u00a0publi\u00e9e le 9 janvier 2026<\/span><\/i><span data-contrast=\"auto\">].<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">\u00ab\u00a0<\/span><i><span data-contrast=\"auto\">M\u00eame si les temp\u00e9ratures de surface ont l\u00e9g\u00e8rement baiss\u00e9 par rapport \u00e0 2023 et 2024, la chaleur stock\u00e9e dans les 2\u202f000 premiers m\u00e8tres de l\u2019oc\u00e9an a atteint un nouveau record. Le contenu thermique de l\u2019oc\u00e9an constitue un indicateur fiable du changement climatique, en capturant la chaleur accumul\u00e9e \u00e0 la surface comme en profondeur<\/span><\/i><span data-contrast=\"auto\">. \u00bb<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"none\">Les temp\u00e9ratures\u00a0de surface\u00a0restent parmi les plus \u00e9lev\u00e9es jamais enregistr\u00e9es<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">En 2025, la temp\u00e9rature moyenne mondiale \u00e0 la surface de la mer (entre 60\u00b0S et 60\u00b0N) a atteint 20,80 \u00b1 0,12 \u00b0C,\u00a0<\/span><b><span data-contrast=\"auto\">se classant au troisi\u00e8me rang des ann\u00e9es les plus chaudes\u00a0depuis le d\u00e9but des relev\u00e9s,\u00a0apr\u00e8s 2023<\/span><\/b><span data-contrast=\"auto\">\u00a0(deuxi\u00e8me ann\u00e9e la plus chaude) et 2024 (ann\u00e9e la plus chaude).<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Dans l&rsquo;ensemble, 81% de\u00a0l\u2019oc\u00e9an\u00a0a\u00a0connu des temp\u00e9ratures de surface sup\u00e9rieures \u00e0 la moyenne.\u00a0Certaines\u00a0r\u00e9gions\u00a0ont \u00e9t\u00e9 particuli\u00e8rement touch\u00e9es, notamment l&rsquo;est de l&rsquo;Atlantique Nord,\u00a0certaines parties de l&rsquo;oc\u00e9an Austral (entre l&rsquo;Afrique du Sud et l&rsquo;Australie) et l&rsquo;ouest du Pacifique.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">Faits marquants par r\u00e9gion\u00a0\u2013\u00a0Europe<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">Atlantique Nord\u00a0(<\/span><\/b><b><span data-contrast=\"none\">entre\u00a00\u00b0N and 60\u00b0N)<\/span><\/b><span data-ccp-props=\"{&quot;335559739&quot;:0}\">\u00a0<\/span><\/p><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"17\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Temp\u00e9rature moyenne de la surface de la mer : 22,42 \u00b1 0,18 \u00b0C,\u00a0<\/span><b><span data-contrast=\"auto\">sixi\u00e8me ann\u00e9e la plus chaude des 33 derni\u00e8res ann\u00e9es.<\/span><\/b><span data-contrast=\"auto\">\u00a0<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"17\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><span data-contrast=\"auto\">2025 a \u00e9t\u00e9 l&rsquo;une des trois ann\u00e9es les plus chaudes pour pr\u00e8s d&rsquo;un quart du bassin (23 %).<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"17\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"3\" data-aria-level=\"1\"><span data-contrast=\"auto\">Des temp\u00e9ratures moyennes annuelles record ont \u00e9t\u00e9 observ\u00e9es dans le golfe du Mexique, ainsi que dans la partie orientale du golfe de Gascogne et autour des \u00eeles Britanniques.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li><\/ul><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"17\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"4\" data-aria-level=\"1\"><span data-contrast=\"auto\">Ces r\u00e9gions ont \u00e9galement enregistr\u00e9 de multiples records mensuels tout au long de l&rsquo;ann\u00e9e (jusqu&rsquo;\u00e0 6 \u00e0 8 records mensuels pour une grande partie du golfe de Gascogne)<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li><\/ul><p><b><span data-contrast=\"auto\">Mer M\u00e9diterran\u00e9e\u00a0<\/span><\/b><span data-ccp-props=\"{&quot;335559739&quot;:0}\">\u00a0<\/span><\/p><ul><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"1\" data-aria-level=\"1\"><span data-contrast=\"auto\">Temp\u00e9rature moyenne de la surface de la mer : 21,21 \u00b1 0,07 \u00b0C, ce qui fait de\u00a0<\/span><b><span data-contrast=\"auto\">2025 la deuxi\u00e8me ann\u00e9e la plus chaude<\/span><\/b><span data-contrast=\"auto\">\u00a0apr\u00e8s 2024 (21,32 \u00b1 0,14 \u00b0C).<\/span><span data-ccp-props=\"{&quot;335559739&quot;:0}\">\u00a0<\/span><\/li><li aria-setsize=\"-1\" data-leveltext=\"\uf0b7\" data-font=\"Symbol\" data-listid=\"8\" data-list-defn-props=\"{&quot;335552541&quot;:1,&quot;335559685&quot;:720,&quot;335559991&quot;:360,&quot;469769226&quot;:&quot;Symbol&quot;,&quot;469769242&quot;:[8226],&quot;469777803&quot;:&quot;left&quot;,&quot;469777804&quot;:&quot;\uf0b7&quot;,&quot;469777815&quot;:&quot;hybridMultilevel&quot;}\" data-aria-posinset=\"2\" data-aria-level=\"1\"><b><span data-contrast=\"auto\">98 % du bassin\u00a0<\/span><\/b><span data-contrast=\"auto\">a enregistr\u00e9 des temp\u00e9ratures\u00a0<\/span><b><span data-contrast=\"auto\">sup\u00e9rieures \u00e0 la moyenne<\/span><\/b><span data-contrast=\"auto\">, 25 % du bassin atteignant au moins 1 \u00b0C au-dessus de la moyenne.<\/span><span data-ccp-props=\"{&quot;335559739&quot;:0}\">\u00a0<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-789bf25 e-flex e-con-boxed e-con e-parent\" data-id=\"789bf25\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18c4bde elementor-widget elementor-widget-image\" data-id=\"18c4bde\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1396\" height=\"595\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/1993-2025-Med-Sea-SST-anomaly-stripes.jpg\" class=\"attachment-full size-full wp-image-23131\" alt=\"\" srcset=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/1993-2025-Med-Sea-SST-anomaly-stripes.jpg 1396w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/1993-2025-Med-Sea-SST-anomaly-stripes-300x128.jpg 300w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/1993-2025-Med-Sea-SST-anomaly-stripes-1024x436.jpg 1024w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/1993-2025-Med-Sea-SST-anomaly-stripes-768x327.jpg 768w\" sizes=\"(max-width: 1396px) 100vw, 1396px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d28e8b1 e-flex e-con-boxed e-con e-parent\" data-id=\"d28e8b1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-071e387 elementor-widget elementor-widget-text-editor\" data-id=\"071e387\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><span class=\"TextRun SCXW240614999 BCX8\" lang=\"FR-FR\" xml:lang=\"FR-FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW240614999 BCX8\">Anomalies annuelles de la temp\u00e9rature de surface de la mer par rapport \u00e0 la moyenne \u00e0 long terme (1993-2022) en mer M\u00e9diterran\u00e9e. Donn\u00e9es : GLO12, GLORYS12. Cr\u00e9dit : <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW240614999 BCX8\">Copernicus<\/span><span class=\"NormalTextRun SCXW240614999 BCX8\">\u00a0Marine Service\/Mercator\u00a0<\/span><span class=\"NormalTextRun SCXW240614999 BCX8\">Oc\u00e9an<\/span><span class=\"NormalTextRun SCXW240614999 BCX8\">\u00a0International.<\/span><\/span><span class=\"EOP SCXW240614999 BCX8\" data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559685&quot;:720,&quot;335559740&quot;:276}\">\u00a0<\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8a4f928 e-flex e-con-boxed e-con e-parent\" data-id=\"8a4f928\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79b1db8 elementor-widget elementor-widget-text-editor\" data-id=\"79b1db8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><span data-contrast=\"none\">L&rsquo;ann\u00e9e La\u00a0Ni\u00f1a\u00a0la plus chaude jamais enregistr\u00e9e<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Les temp\u00e9ratures de surface de la mer dans le centre de l&rsquo;oc\u00e9an Pacifique \u00e9quatorial\u00a0ont \u00e9t\u00e9 inf\u00e9rieures \u00e0 la moyenne de plus de 0,5\u202f\u00b0C\u00a0entre ao\u00fbt et d\u00e9cembre 2025,\u00a0signalant\u00a0le\u00a0<\/span><b><span data-contrast=\"auto\">d\u00e9but d&rsquo;un \u00e9pisode La\u00a0Ni\u00f1a, la phase froide du ph\u00e9nom\u00e8ne El Ni\u00f1o-Oscillation australe (ENSO).<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Malgr\u00e9 cet effet naturel de refroidissement,\u00a0<\/span><b><span data-contrast=\"auto\">l\u2019ann\u00e9e\u00a02025 a \u00e9t\u00e9 en moyenne plus chaude que les ann\u00e9es 2015 et 2016, marqu\u00e9es par un El Ni\u00f1o particuli\u00e8rement intense<\/span><\/b><span data-contrast=\"auto\">. Ce paradoxe apparent s&rsquo;explique\u00a0principalement\u00a0par\u00a0la hausse\u00a0\u00e0 long terme des temp\u00e9ratures\u00a0de\u00a0surface de\u00a0l\u2019oc\u00e9an\u00a0li\u00e9e\u00a0au changement climatique induit par l&rsquo;activit\u00e9 humaine (OMM ; GIEC AR6).<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><i><span data-contrast=\"auto\">\u00ab Bien qu&rsquo;il s&rsquo;agisse d&rsquo;une ann\u00e9e La\u00a0Ni\u00f1a, 2025\u00a0figure\u00a0parmi les trois ann\u00e9es les plus chaudes jamais enregistr\u00e9es.\u00a0Ce qui \u00e9tait consid\u00e9r\u00e9 comme \u00ab chaud \u00bb il y a dix ans\u00a0correspond aujourd\u2019hui \u00e0 la\u00a0nouvelle norme climatique,\u00a0illustrant encore\u00a0l&rsquo;augmentation\u00a0durable\u00a0des temp\u00e9ratures\u00a0de\u00a0surface de la\u00a0mer,\u00a0\u00bb<\/span><\/i><span data-contrast=\"auto\">, a d\u00e9clar\u00e9\u00a0<\/span><b><span data-contrast=\"auto\">Romain\u00a0Bourdalle-Badie, oc\u00e9anographe chez Mercator\u00a0Ocean<\/span><\/b><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-03cd942 e-flex e-con-boxed e-con e-parent\" data-id=\"03cd942\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-90e8e55 elementor-widget elementor-widget-image\" data-id=\"90e8e55\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-1024x1024.png\" class=\"attachment-large size-large wp-image-23133\" alt=\"\" srcset=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-1024x1024.png 1024w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-300x300.png 300w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-150x150.png 150w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-768x768.png 768w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-1536x1536.png 1536w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/Global-ocean-SST-vs-El-Nino-Southern-Oscillation-since-1993-2048x2048.png 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-75d80bb e-flex e-con-boxed e-con e-parent\" data-id=\"75d80bb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b8000bc elementor-widget elementor-widget-text-editor\" data-id=\"b8000bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><span class=\"TextRun SCXW170875109 BCX8\" lang=\"FR-FR\" xml:lang=\"FR-FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW170875109 BCX8\">Temp\u00e9rature moyenne de\u00a0<\/span><span class=\"NormalTextRun SCXW170875109 BCX8\">surface de la mer par an depuis 1993 (ligne noire) et dur\u00e9e des ph\u00e9nom\u00e8nes El Ni\u00f1o et La\u00a0<\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW170875109 BCX8\">Ni\u00f1a<\/span><span class=\"NormalTextRun SCXW170875109 BCX8\">\u00a0(barres rouges et bleues respectivement). Les valeurs annuelles de la temp\u00e9rature de la surface de la mer sont repr\u00e9sent\u00e9es au milieu de l&rsquo;ann\u00e9e (juin) afin d&rsquo;\u00eatre align\u00e9es visuellement avec l&rsquo;indice ENSO mensuel. Donn\u00e9es : GLO12\/ OSTIA\/ODYSSEEA\/ OISST\/ Nino 3.4 S\u00e9rie chronologique de la temp\u00e9rature de la surface de la mer. Source :<\/span><\/span><span class=\"TextRun SCXW170875109 BCX8\" lang=\"FR-FR\" xml:lang=\"FR-FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW170875109 BCX8\">\u00a0<\/span><\/span><span class=\"TextRun SCXW170875109 BCX8\" lang=\"FR-FR\" xml:lang=\"FR-FR\" data-contrast=\"auto\"><span class=\"NormalTextRun SpellingErrorV2Themed SCXW170875109 BCX8\">Copernicus<\/span><span class=\"NormalTextRun SCXW170875109 BCX8\">\u00a0Marine Service\/Mercator Oc\u00e9an International<\/span><\/span><span class=\"EOP SCXW170875109 BCX8\" data-ccp-props=\"{}\">\u00a0<\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1112146 e-flex e-con-boxed e-con e-parent\" data-id=\"1112146\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9e7bdb9 elementor-widget elementor-widget-text-editor\" data-id=\"9e7bdb9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><span data-contrast=\"none\">Les vagues de chaleur marines ont touch\u00e9 la majeure partie de l&rsquo;oc\u00e9an<\/span><\/b><span data-ccp-props=\"{}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">En 2025,\u00a0<\/span><b><span data-contrast=\"auto\">89 % de l&rsquo;oc\u00e9an mondial<\/span><\/b><span data-contrast=\"auto\">\u00a0(entre 60\u00b0S et 60\u00b0N) a \u00e9t\u00e9\u00a0affect\u00e9\u00a0par au moins\u00a0une<\/span><b><span data-contrast=\"auto\">\u00a0vague de chaleur marine<\/span><\/b><span data-contrast=\"auto\">, ce qui en fait la sixi\u00e8me plus grande \u00e9tendue\u00a0jamais enregistr\u00e9e\u00a0depuis 1993. Plus\u00a0<\/span><b><span data-contrast=\"auto\">de la moiti\u00e9 de l&rsquo;oc\u00e9an mondial (55 %)<\/span><\/b><span data-contrast=\"auto\">\u00a0a connu des\u00a0<\/span><b><span data-contrast=\"auto\">vagues de chaleur marines intenses<\/span><\/b><span data-contrast=\"auto\">, class\u00e9es comme fortes, s\u00e9v\u00e8res ou extr\u00eames.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">Faits marquants par r\u00e9gion &#8211; Europe<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">Atlantique Nord<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><ul><li><b><span data-contrast=\"auto\"> 97 % du bassin<\/span><\/b><span data-contrast=\"auto\">a \u00e9t\u00e9 touch\u00e9 par des vagues de chaleur marines, soit la\u00a0<\/span><b><span data-contrast=\"auto\">troisi\u00e8me plus grande \u00e9tendue jamais enregistr\u00e9e<\/span><\/b><span data-contrast=\"auto\">.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li><li><span data-contrast=\"auto\"> Des \u00e9v\u00e9nements intenses ont couvert 63 % de la r\u00e9gion.<\/span><\/li><\/ul><p><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">Mer M\u00e9diterran\u00e9e<\/span><\/b><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><ul><li><span data-contrast=\"auto\"> L&rsquo;ensemble de la mer M\u00e9diterran\u00e9e a \u00e9t\u00e9 touch\u00e9 par une vague de chaleur marine en 2025 (99,6 %).<\/span><\/li><li><b><span data-contrast=\"auto\">93 % du bassin<\/span><\/b><span data-contrast=\"auto\">\u00a0a \u00e9t\u00e9 touch\u00e9 par des vagues de chaleur marines intenses, se classant au troisi\u00e8me rang apr\u00e8s 2023 et 2024.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li><li><b><span data-contrast=\"auto\">Juin 2025<\/span><\/b><span data-contrast=\"auto\">\u00a0: 64 % de la M\u00e9diterran\u00e9e a \u00e9t\u00e9 touch\u00e9e simultan\u00e9ment\u00a0\u2013\u00a0un record pour le mois de juin dans le bassin.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li><\/ul><p><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:0,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p><p><i><span data-contrast=\"auto\">\u00ab\u00a0En 2025, les c\u00f4tes europ\u00e9ennes ont \u00e9t\u00e9 confront\u00e9es \u00e0 des temp\u00e9ratures extr\u00eames \u00e0 la surface de la mer, avec des vagues de chaleur marines intenses touchant la quasi-totalit\u00e9 de la mer M\u00e9diterran\u00e9e et des \u00e9v\u00e9nements de longue dur\u00e9e le long de la c\u00f4te atlantique. Au cours des trois derni\u00e8res ann\u00e9es, ces \u00e9v\u00e9nements prolong\u00e9s et exceptionnellement chauds ont atteint des niveaux sans pr\u00e9c\u00e9dent, augmentant le risque pour les \u00e9cosyst\u00e8mes marins.\u00a0\u00bb, a d\u00e9clar\u00e9\u00a0<\/span><\/i><b><i><span data-contrast=\"auto\">Simon van\u00a0Gennip, oc\u00e9anographe\u00a0\u00e0\u00a0Mercator\u00a0Oc\u00e9an\u00a0International.\u00a0<\/span><\/i><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0}\">\u00a0<\/span><\/p><p><i><span data-contrast=\"auto\">\u00a0<\/span><\/i><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559739&quot;:0}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"none\">La\u00a0glace de mer\u00a0reste inf\u00e9rieure \u00e0 la moyenne dans les deux h\u00e9misph\u00e8res<\/span><\/b><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">En 2025,\u00a0<\/span><b><span data-contrast=\"auto\">l&rsquo;\u00e9tendue de la\u00a0glace de\u00a0mer,\u00a0tant\u00a0dans\u00a0l&rsquo;Arctique\u00a0que dans\u00a0l&rsquo;Antarctique,\u00a0est rest\u00e9e nettement inf\u00e9rieure \u00e0 la moyenne \u00e0 long terme (1993-2010)<\/span><\/b><span data-contrast=\"auto\">.\u00a0Sur 12 mois, 11 ont enregistr\u00e9 l\u2019une des cinq \u00e9tendues les plus faibles jamais observ\u00e9es \u00e0 l\u2019\u00e9chelle mondiale.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">Dans l&rsquo;Arctique, la\u00a0formation de la\u00a0glace de mer\u00a0a \u00e9t\u00e9\u00a0retard\u00e9e.\u00a0En\u00a0novembre, les temp\u00e9ratures de surface de la mer ont d\u00e9pass\u00e9 de plus de 2\u202f\u00b0C la moyenne dans des r\u00e9gions comme la mer de Barents et la mer de Kara, entra\u00eenant en d\u00e9cembre un record de faible \u00e9tendue de glace. Ces relev\u00e9s confirment le r\u00e9chauffement rapide en cours dans la r\u00e9gion.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;201341983&quot;:0,&quot;335551550&quot;:6,&quot;335551620&quot;:6,&quot;335559685&quot;:0,&quot;335559737&quot;:0,&quot;335559738&quot;:240,&quot;335559739&quot;:240,&quot;335559740&quot;:259}\">\u00a0<\/span><\/p><p><span data-contrast=\"auto\">En Antarctique, la formation de glace de mer a\u00a0\u00e9galement\u00a0\u00e9t\u00e9 retard\u00e9e sur de\u00a0vastes\u00a0zones\u00a0,\u00a0en particulier dans le secteur de l&rsquo;oc\u00e9an Indien.\u00a0Des\u00a0pertes\u00a0significatives\u00a0de glace de mer\u00a0ont \u00e9t\u00e9 observ\u00e9es\u00a0m\u00eame pendant la p\u00e9riode d&rsquo;extension maximale.\u00a0L&rsquo;\u00e9tendue de la glace de mer est\u00a0ainsi\u00a0rest\u00e9e\u00a0largement inf\u00e9rieure\u00a0\u00e0\u00a0la moyenne pendant la majeure partie de l&rsquo;hiver, de juin \u00e0 octobre,\u00a0suivant de\u00a0pr\u00e8s les tendances observ\u00e9es en 2023 et 2024.\u00ab\u00a0Le r\u00e9chauffement continu de la plan\u00e8te et des oc\u00e9ans a un impact direct sur la banquise polaire. En 2025, presque toute l\u2019ann\u00e9e a \u00e9t\u00e9 parmi les plus faibles jamais enregistr\u00e9es, avec un record en Arctique pour le mois de d\u00e9cembre et l\u2019une des valeurs hivernales les plus basses en Antarctique. Les r\u00e9gions polaires restent des indicateurs majeurs de changements profonds et durables\u00a0\u00bb<\/span><b><span data-contrast=\"auto\">Gilles Garric, oc\u00e9anographe polaire chez Mercator Ocean.<\/span><\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6983bfa e-flex e-con-boxed e-con e-parent\" data-id=\"6983bfa\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0ea2988 elementor-widget elementor-widget-image\" data-id=\"0ea2988\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-1024x1024.png\" class=\"attachment-large size-large wp-image-23167\" alt=\"\" srcset=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-1024x1024.png 1024w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-300x300.png 300w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-150x150.png 150w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-768x768.png 768w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-1536x1536.png 1536w, https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-2048x2048.png 2048w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-28fed4c e-flex e-con-boxed e-con e-parent\" data-id=\"28fed4c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-51abbf1 elementor-widget elementor-widget-text-editor\" data-id=\"51abbf1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em><span class=\"TextRun SCXW95377898 BCX8\" lang=\"FR-BE\" xml:lang=\"FR-BE\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW95377898 BCX8\">Anomalies moyennes de la temp\u00e9rature de surface de la mer dans la r\u00e9gion arctique pour novembre 2025 et \u00e9tendue de la glace de mer (en blanc) pour novembre 2025. La climatologie pour novembre (1993-2010) est repr\u00e9sent\u00e9e par la ligne noire. Donn\u00e9es : GLO12\/GLORYS12. Cr\u00e9dit : <\/span><span class=\"NormalTextRun SpellingErrorV2Themed SCXW95377898 BCX8\">Copernicus<\/span><span class=\"NormalTextRun SCXW95377898 BCX8\">\u00a0Marine Service \/ Mercator Oc\u00e9an International\u00a0<\/span><\/span><span class=\"EOP SCXW95377898 BCX8\" data-ccp-props=\"{&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-96250c4 e-flex e-con-boxed e-con e-parent\" data-id=\"96250c4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9a33aa4 elementor-widget elementor-widget-spacer\" data-id=\"9a33aa4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1af3e62 e-flex e-con-boxed e-con e-parent\" data-id=\"1af3e62\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8693060 elementor-widget elementor-widget-text-editor\" data-id=\"8693060\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><span data-contrast=\"none\">A propos de Mercator Oc\u00e9an International &#8211; <\/span><\/b><span data-contrast=\"auto\">Mercator Oc\u00e9an International est l&rsquo;un des principaux centres mondiaux de pr\u00e9vision oc\u00e9anique et un pilier essentiel de l&rsquo;infrastructure oc\u00e9anique num\u00e9rique europ\u00e9enne. Entit\u00e9 mandat\u00e9e par la Commission europ\u00e9enne pour le\u00a0<\/span><b><span data-contrast=\"auto\">Service\u00a0Copernicus\u00a0Marine<\/span><\/b><span data-contrast=\"auto\">, elle fournit gratuitement et en libre acc\u00e8s des donn\u00e9es et des pr\u00e9visions oc\u00e9aniques \u00e0 titre de service public aux gouvernements, autorit\u00e9s, scientifiques et utilisateurs strat\u00e9giques du monde entier. Mercator\u00a0Oc\u00e9an\u00a0dirige \u00e9galement le d\u00e9veloppement du\u00a0<\/span><b><span data-contrast=\"auto\">Jumeau Num\u00e9rique europ\u00e9en de l\u2019oc\u00e9an<\/span><\/b><span data-contrast=\"auto\">, une initiative europ\u00e9enne phare d\u00e9velopp\u00e9e avec des partenaires sous la direction de la Commission europ\u00e9enne afin de soutenir la prise de d\u00e9cision oc\u00e9anographique bas\u00e9e sur des sc\u00e9narios. En 2025, Mercator\u00a0Oc\u00e9an\u00a0a franchi une \u00e9tape importante vers son statut d&rsquo;<\/span><b><span data-contrast=\"auto\">organisation internationale<\/span><\/b><span data-contrast=\"auto\">, avec l&rsquo;adh\u00e9sion de douze pays europ\u00e9ens \u00e0 la convention internationale \u00e9tablissant le\u00a0<\/span><b><span data-contrast=\"auto\">Mercator International Centre for the Ocean<\/span><\/b><span data-contrast=\"auto\">. <\/span><a href=\"http:\/\/www.mercator-ocean.fr\/\"><b><span data-contrast=\"none\">www.mercator-ocean.fr<\/span><\/b><\/a><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><span data-ccp-props=\"{&quot;335551550&quot;:6,&quot;335551620&quot;:6}\">\u00a0<\/span><\/p><p><b><span data-contrast=\"auto\">A propos du Copernicus Marine Service &#8211; <\/span><\/b><span data-contrast=\"none\">Le\u202f<\/span><a href=\"https:\/\/marine.copernicus.eu\/\"><span data-contrast=\"none\">Service Copernicus\u00a0Marine<\/span><\/a><span data-contrast=\"none\">\u202fest l&rsquo;un des six services de\u00a0Copernicus, le programme d&rsquo;observation de la Terre de l&rsquo;Union europ\u00e9enne. Ce service, qui assure l&rsquo;analyse et la pr\u00e9vision oc\u00e9aniques, est financ\u00e9 par l&rsquo;Union europ\u00e9enne. Le Service\u00a0Copernicus\u00a0Marine fournit des informations de r\u00e9f\u00e9rence r\u00e9guli\u00e8res et syst\u00e9matiques sur l&rsquo;oc\u00e9an bleu (physique), blanc (glace de mer) et vert (biog\u00e9ochimique et biologique) \u00e0 l&rsquo;\u00e9chelle mondiale et europ\u00e9enne. Ses donn\u00e9es et ses produits soutiennent les politiques cl\u00e9s de l&rsquo;UE et internationales, contribuant ainsi aux efforts en mati\u00e8re de r\u00e9duction de la pollution, de protection marine, de s\u00e9curit\u00e9 et de routage maritimes, de gestion durable des ressources, d&rsquo;\u00e9nergie marine renouvelable, de croissance bleue, de surveillance du climat et de pr\u00e9visions m\u00e9t\u00e9orologiques. Le service vise \u00e9galement \u00e0 sensibiliser le public en fournissant aux citoyens europ\u00e9ens et du monde entier des informations accessibles sur les questions oc\u00e9aniques.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"featured_media":23167,"template":"","translation-status":[],"class_list":["post-23179","press-release","type-press-release","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Malgr\u00e9 le d\u00e9but de La Ni\u00f1a, 2025 figure parmi les trois ann\u00e9es les plus chaudes pour l\u2019oc\u00e9an depuis 1993 - Mercator Ocean International<\/title>\n<meta name=\"description\" content=\"Malgr\u00e9 l\u2019amorce d&#039;une phase La Ni\u00f1a, g\u00e9n\u00e9ralement associ\u00e9e \u00e0 un effet de refroidissement \u00e0 l\u2019\u00e9chelle mondiale, l\u2019ann\u00e9e 2025 figure parmi les trois ann\u00e9es les plus chaudes jamais observ\u00e9es pour l&#039; oc\u00e9an global, selon les analyses de Mercator Ocean International.\" \/>\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\/press-release\/2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Malgr\u00e9 le d\u00e9but de La Ni\u00f1a, 2025 figure parmi les trois ann\u00e9es les plus chaudes pour l\u2019oc\u00e9an depuis 1993\" \/>\n<meta property=\"og:description\" content=\"Malgr\u00e9 l\u2019amorce d&#039;une phase La Ni\u00f1a, g\u00e9n\u00e9ralement associ\u00e9e \u00e0 un effet de refroidissement \u00e0 l\u2019\u00e9chelle mondiale, l\u2019ann\u00e9e 2025 figure parmi les trois ann\u00e9es les plus chaudes jamais observ\u00e9es pour l&#039; oc\u00e9an global, selon les analyses de Mercator Ocean International.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mercator-ocean.eu\/fr\/press-release\/2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993\/\" \/>\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:modified_time\" content=\"2026-01-21T09:55:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2026\/01\/2025-November-SST-in-the-Arctic-1024x1024.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@MercatorOcean\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"11 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/press-release\\\/2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993\\\/\",\"url\":\"https:\\\/\\\/www.mercator-ocean.eu\\\/fr\\\/press-release\\\/2025-figure-parmi-les-trois-annees-les-plus-chaudes-pour-locean-depuis-1993\\\/\",\"name\":\"Malgr\u00e9 le d\u00e9but de La Ni\u00f1a, 2025 figure parmi les trois ann\u00e9es les plus chaudes pour l\u2019oc\u00e9an depuis 1993 - 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