{"id":16472,"date":"2025-01-25T00:00:00","date_gmt":"2025-01-25T00:00:00","guid":{"rendered":"https:\/\/www.mercator-ocean.eu\/bulletin\/previsions-de-canicule-marine-1er-fevrier\/"},"modified":"2025-05-26T12:44:16","modified_gmt":"2025-05-26T12:44:16","slug":"previsions-de-canicule-marine-1er-fevrier","status":"publish","type":"bulletin","link":"https:\/\/www.mercator-ocean.eu\/fr\/bulletin\/previsions-de-canicule-marine-1er-fevrier\/","title":{"rendered":"Pr\u00e9visions de canicule marine &#8211; 1er f\u00e9vrier"},"content":{"rendered":"<p class=\"has-text-align-center\" style=\"font-size:15px\">Le bulletin sur les vagues de chaleur marine fournit des pr\u00e9visions et des analyses sur les vagues de chaleur marine dans le monde entier et tout au long de l&rsquo;ann\u00e9e. Les donn\u00e9es utilis\u00e9es comprennent des observations (cartes satellitaires de la temp\u00e9rature de surface de la mer) et des analyses de mod\u00e8les num\u00e9riques (assimilant les observations satellitaires et in situ) afin de d\u00e9river des pr\u00e9visions de canicule marine pour une p\u00e9riode de 10 jours. <a href=\"#_ftn1\"><\/a> <strong>Les pr\u00e9visions de cette semaine ont \u00e9t\u00e9 \u00e9tablies \u00e0 partir du site&nbsp;<strong>\u00e0 titre de comparaison<\/strong>&nbsp;la situation de la canicule marine du 21\/01\/2025.<\/strong><\/p><div style=\"height:46px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"has-text-align-center wp-block-heading\"><strong> Pr\u00e9visions pour le 1er f\u00e9vrier <\/strong><\/h2><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/categ_global_GLO12V4_SST_0m_FCST_2025-02-01-1024x561.jpg\" alt=\"\" class=\"wp-image-37402\"\/><figcaption><em><em>Cat\u00e9gories de vagues de chaleur marine pour le 1er f\u00e9vrier 2025 (oc\u00e9an mondial). GLO12. Source : Mercator Ocean International&nbsp;&nbsp;<\/em><\/em><\/figcaption><\/figure><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/State-diff_global_GLO12V4_SST_0m_FCST_2025-02-01-1024x555.jpg\" alt=\"\" class=\"wp-image-37404\"\/><figcaption><em>Diff\u00e9rences de cat\u00e9gories et d&rsquo;\u00e9tendue g\u00e9ographique pour le 1er f\u00e9vrier 2025 (oc\u00e9an mondial). GLO12. Source : Mercator Ocean International&nbsp;<\/em><\/figcaption><\/figure><p><\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><p class=\"has-large-font-size\"><strong>Oc\u00e9an Indien<\/strong><\/p><p class=\"has-medium-font-size\"><strong><\/strong> <strong><strong><strong><\/strong><\/strong> <\/strong>La vague de chaleur marine situ\u00e9e \u00e0 l&rsquo;est de Madagascar <strong>diminue en \u00e9tendue et en intensit\u00e9<\/strong>, avec des cat\u00e9gories mod\u00e9r\u00e9es et moins de cat\u00e9gories fortes. Une vague de chaleur marine de <strong>forte cat\u00e9gorie se d\u00e9veloppe \u00e0 l&rsquo;ouest de la c\u00f4te autralienne.&nbsp;<\/strong><\/p><p class=\"has-large-font-size\"><strong>Pacifique tropical<\/strong> <strong>Tropical<\/strong><\/p><p class=\"has-medium-font-size\"><strong><\/strong> Les vagues de chaleur marine entre 0\u00b0 et 30\u00b0N, ainsi que celles autour de la Papouasie-Nouvelle-Guin\u00e9e, diminuent en superficie et en intensit\u00e9, avec un passage de la cat\u00e9gorie \u00ab\u00a0forte\u00a0\u00bb \u00e0 la cat\u00e9gorie \u00ab\u00a0mod\u00e9r\u00e9e\u00a0\u00bb.&nbsp;<\/p><p class=\"has-large-font-size\"><strong>Oc\u00e9an Pacifique Sud<\/strong><\/p><p class=\"has-medium-font-size\"><strong><strong><\/strong> <\/strong>Au large de la Nouvelle-Z\u00e9lande \u00e0 150\u00b0W, la vague de chaleur marine <strong>gagne en intensit\u00e9, passant des cat\u00e9gories mod\u00e9r\u00e9e \u00e0 forte pr\u00e9dominante, ainsi que localement s\u00e9v\u00e8re \u00e0 extr\u00eame. <\/strong>La vague de chaleur marine au large des c\u00f4tes chiliennes<strong> augmente en taille et en intensit\u00e9<\/strong>. La plus grande partie se trouve dans les cat\u00e9gories <strong>forte \u00e0 s\u00e9v\u00e8re <\/strong>, avec une grande zone dans la cat\u00e9gorie <strong>extr\u00eame <\/strong>.<\/p><h3 class=\"has-text-align-center wp-block-heading\">Zone europ\u00e9enne<\/h3><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/categ_europe_GLO12V4_SST_0m_FCST_2025-02-01-982x700.jpg\" alt=\"\" class=\"wp-image-37406\"\/><figcaption><em><em>Cat\u00e9gories de vagues de chaleur marine pour le 1er f\u00e9vrier 2025 (Europe). GLO12. Source : Mercator Ocean International&nbsp;&nbsp;<\/em><\/em><\/figcaption><\/figure><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/State-diff_europe_GLO12V4_SST_0m_FCST_2025-02-01-994x700.jpg\" alt=\"\" class=\"wp-image-37408\"\/><figcaption><em>Diff\u00e9rences de cat\u00e9gories et d&rsquo;\u00e9tendue g\u00e9ographique pour le 1er f\u00e9vrier 2025 (Europe). GLO12. Source : Mercator Ocean International<\/em>&nbsp;<\/figcaption><\/figure><\/div><\/div><p class=\"has-large-font-size\"><strong>Mer M\u00e9diterran\u00e9e<\/strong><\/p><p class=\"has-medium-font-size\"><strong><\/strong> La vague de chaleur marine <strong>s&rsquo;intensifie<\/strong> sur l&rsquo;est du bassin, avec une plus grande surface de cat\u00e9gorie<strong> forte et s\u00e9v\u00e8re<\/strong>.<\/p><p class=\"has-large-font-size\"><strong>Oc\u00e9an Atlantique Nord<\/strong><\/p><p class=\"has-medium-font-size\"><strong><\/strong> L&rsquo;intensit\u00e9 de la vague de chaleur marine du centre du bassin aux \u00eeles britanniques <strong>diminuera, avec moins de surface occup\u00e9e par les fortes cat\u00e9gories.&nbsp;<\/strong><\/p><div style=\"height:69px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"has-text-align-center wp-block-heading\"><strong> Anomalies de temp\u00e9rature hebdomadaires <\/strong><\/h2><h2 class=\"has-text-align-center wp-block-heading\"><strong>26\/01 &#8211; 01\/02\/2025<\/strong><\/h2><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/Anom_global_GLO12V4_SST_0m_FCST_2025-02-01-1024x637.jpg\" alt=\"\" class=\"wp-image-37410\"\/><figcaption><em><em>Carte des anomalies de temp\u00e9rature de surface de l&rsquo;eau pour la semaine du 26 janvier au 1er f\u00e9vrier 2025. Oc\u00e9an mondial. GLO12. Source : Mercator Ocean International<\/em><\/em><\/figcaption><\/figure><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\"><figure class=\"alignright size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/01\/Anom_europe_GLO12V4_SST_0m_FCST_2025-02-01-864x700.jpg\" alt=\"\" class=\"wp-image-37412\"\/><figcaption><em>Carte des anomalies de temp\u00e9rature de surface de l&rsquo;eau pour la semaine <em><em><em><em><em><em>26 janvier au 1er f\u00e9vrier,<\/em><\/em><\/em><\/em><\/em><\/em>. Zone europ\u00e9enne. GLO12. Source : Mercator Ocean International<\/em><\/figcaption><\/figure><\/div><p><\/p><\/div><\/div><h6 class=\"has-text-align-center wp-block-heading\"><strong>Anomalies de la temp\u00e9rature moyenne de surface de la mer dans chaque r\u00e9gion oc\u00e9anique mondiale pour la semaine du 26 janvier au 1er f\u00e9vrier,<\/strong> <strong>2025.<\/strong><\/h6><p><\/p><\/div><\/div><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Mer M\u00e9diterran\u00e9e <\/strong><\/td><td>0.5\u00b0C \u00e0 2,5\u00b0C<\/td><\/tr><tr><td><strong>Oc\u00e9an Atlantique Nord<\/strong><\/td><td>-3\u00b0C \u00e0 3\u00b0C<\/td><\/tr><tr><td><strong>Oc\u00e9an Pacifique Sud<\/strong><\/td><td>-2\u00b0C \u00e0 3\u00b0C<\/td><\/tr><tr><td><strong>Oc\u00e9an Pacifique tropical<\/strong><\/td><td>-3\u00b0C \u00e0 2,5\u00b0C<\/td><\/tr><tr><td><strong><strong>Oc\u00e9an Indien<\/strong><\/strong><\/td><td>-3\u00b0C \u00e0 3\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure><p><em><em>Acc\u00e9dez au bulletin physique mondial quotidien pour une pr\u00e9vision \u00e0 9 jours&nbsp;<a href=\"https:\/\/bulletin.mercator-ocean.fr\/fr\/PSY4#3\/75.50\/-50.98\" target=\"_blank\" rel=\"noreferrer noopener\">ici.<\/a><\/em><\/em><\/p><hr class=\"wp-block-separator\"\/><h4 class=\"has-content-secondary-color has-text-color has-medium-font-size wp-block-heading\"> <strong>SONDAGE <\/strong><\/h4><p><span class=\"has-inline-color has-content-heading-color\">Aidez-nous \u00e0 am\u00e9liorer notre contenu ! R\u00e9pondez \u00e0 une enqu\u00eate rapide sur ce bulletin<\/span><span class=\"has-inline-color has-content-primary-color\"> <a href=\"https:\/\/marinecopernicus.typeform.com\/to\/lfTFFCm1\">ici.<\/a><\/span><\/p><hr class=\"wp-block-separator\"\/><h2 class=\"wp-block-heading\" id=\"block-2a23389f-fddf-42cf-8784-1f8a43aaf3c8\">Qu&rsquo;est-ce qu&rsquo;une vague de chaleur marine ?<\/h2><p id=\"block-ddae0c8b-525b-4689-8efd-dddb6877b349\">Les vagues de chaleur marine sont des hausses extr\u00eames de la temp\u00e9rature des oc\u00e9ans pendant une p\u00e9riode prolong\u00e9e. Ils peuvent se produire \u00e0 diff\u00e9rents endroits de l&rsquo;oc\u00e9an, et leur ampleur et leur fr\u00e9quence ont augment\u00e9 au cours des deux derni\u00e8res d\u00e9cennies, avec des effets n\u00e9fastes sur les \u00e9cosyst\u00e8mes et les activit\u00e9s humaines. Selon le dernier rapport publi\u00e9 par le Groupe d&rsquo;experts intergouvernemental sur l&rsquo;\u00e9volution du climat (GIEC AR6 SYR), on estime avec un degr\u00e9 de confiance \u00e9lev\u00e9 qu&rsquo;\u00e0 court terme, avec un r\u00e9chauffement climatique de 1,5 \u00b0C, la fr\u00e9quence croissante des vagues de chaleur marine augmentera les risques de perte de biodiversit\u00e9 dans les oc\u00e9ans, notamment en raison d&rsquo;\u00e9v\u00e9nements de mortalit\u00e9 massive<a href=\"https:\/\/www.mercator-ocean.eu\/en\/mhw-bulletin\/mercator-ocean-marine-heatwaves-bulletin-march-5-2024\/#_ftn1\"><\/a><\/p><p><\/p><h2 class=\"wp-block-heading\" id=\"block-c22bd406-e3b5-4452-884d-525ed594bae7\">Comment les vagues de chaleur marine sont-elles calcul\u00e9es ?&nbsp;<\/h2><p id=\"block-efbd167f-06e4-46ce-9ea0-d54080cf1d16\">Une vague de chaleur marine est un \u00e9pisode au cours duquel la temp\u00e9rature de l&rsquo;oc\u00e9an est anormalement \u00e9lev\u00e9e pendant au moins 5 jours cons\u00e9cutifs.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2024\/09\/MHW_def_sketch-1024x667.png\" alt=\"\" class=\"wp-image-35691\"\/><\/figure><\/div><p class=\"has-text-align-center\"><em>Adapt\u00e9 de Hobday et al. (2018)<\/em><\/p><p>Pour tout endroit de l&rsquo;oc\u00e9an, les temp\u00e9ratures normales sont d\u00e9finies pour chaque jour de l&rsquo;ann\u00e9e en utilisant une p\u00e9riode climatologique (ici 1993-2016). Une vague de chaleur est identifi\u00e9e lorsque la temp\u00e9rature journali\u00e8re mesur\u00e9e se situe dans les 10 % sup\u00e9rieurs des valeurs les plus \u00e9lev\u00e9es enregistr\u00e9es pour ce jour &nbsp;(c&rsquo;est-\u00e0-dire au-dessus du 90e percentile, voir diagramme), et que cette condition persiste pendant au moins cinq jours cons\u00e9cutifs.<\/p><p>L&rsquo;intensit\u00e9 de la vague de chaleur un jour donn\u00e9 est mesur\u00e9e par le nombre de degr\u00e9s au-dessus de la moyenne climatologique (repr\u00e9sent\u00e9e par la ligne noire en gras) indiqu\u00e9e par la fl\u00e8che bleue. Nous pouvons soit calculer l&rsquo;intensit\u00e9 cumul\u00e9e sur l&rsquo;ensemble de la vague de chaleur, soit enregistrer l&rsquo;intensit\u00e9 maximale.<\/p><p>Les vagues de chaleur sont class\u00e9es en fonction de leur intensit\u00e9. Pour ce faire, l&rsquo;intensit\u00e9 est compar\u00e9e \u00e0 la diff\u00e9rence entre la valeur climatologique et la valeur du 90e percentile. Une intensit\u00e9 de mhw comprise entre 1 et 2 fois cette diff\u00e9rence correspond \u00e0 une vague de chaleur de cat\u00e9gorie mod\u00e9r\u00e9e ; entre 2 et 3 fois, \u00e0 une cat\u00e9gorie forte ; entre 3 et 4 fois, \u00e0 une cat\u00e9gorie s\u00e9v\u00e8re ; et une diff\u00e9rence sup\u00e9rieure \u00e0 4 fois correspond \u00e0 une cat\u00e9gorie extr\u00eame.<\/p><hr class=\"wp-block-separator\" id=\"block-6cf1a994-3c04-41cc-bca0-fbf348f09c50\"\/><p id=\"block-f5b3d391-412e-479e-8bec-a9024489bafe\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-admin\/post.php?lang=fr&amp;action=edit&amp;post_type=post&amp;post=29627#_ftnref1\"><\/a>&nbsp;Analyse des ensembles de donn\u00e9es : SST OSTIA (Copernicus Marine Service), OISST (NOAA), GLO12 (Copernicus Marine Service \/ Mercator Ocean International), PSY4 (Copernicus Marine Service \/ Mercator Ocean International), et pr\u00e9visions GLO12 et PSY4.<\/p><p id=\"block-9c218699-1c48-43b6-acbe-be198a86ad95\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-admin\/post.php?post=29627&amp;action=edit#_ftnref1\"><\/a>&nbsp;IPCC AR6 SYR chapitre 4.3 https:\/\/www.ipcc.ch\/report\/ar6\/syr\/downloads\/report\/IPCC_AR6_SYR_LongerReport.pdf<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Le bulletin sur les vagues de chaleur marine fournit des pr\u00e9visions et des analyses sur les vagues de chaleur marine dans le monde entier et tout au long de l&rsquo;ann\u00e9e. Les donn\u00e9es utilis\u00e9es comprennent des observations (cartes satellitaires de la temp\u00e9rature de surface de la mer) et des analyses de mod\u00e8les num\u00e9riques (assimilant les observations [&hellip;]<\/p>\n","protected":false},"featured_media":0,"template":"","categories":[427],"bulletin-templates":[],"bulletins-type":[2409],"translation-status":[2454],"class_list":["post-16472","bulletin","type-bulletin","status-publish","hentry","category-non-classifiee-fr","bulletins-type-vague-de-chaleur-marines"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pr\u00e9visions de canicule marine - 1er f\u00e9vrier - 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\/bulletin\/previsions-de-canicule-marine-1er-fevrier\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pr\u00e9visions de canicule marine - 1er f\u00e9vrier - Mercator Ocean International\" \/>\n<meta property=\"og:description\" content=\"Le bulletin sur les vagues de chaleur marine fournit des pr\u00e9visions et des analyses sur les vagues de chaleur marine dans le monde entier et tout au long de l&rsquo;ann\u00e9e. 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