{"id":16491,"date":"2025-03-14T00:00:00","date_gmt":"2025-03-14T00:00:00","guid":{"rendered":"https:\/\/www.mercator-ocean.eu\/bulletin\/bulletin-des-glaces-de-mer-de-lantarctique-mars-2025\/"},"modified":"2025-08-07T14:19:50","modified_gmt":"2025-08-07T14:19:50","slug":"bulletin-des-glaces-de-mer-de-lantarctique-mars-2025","status":"publish","type":"bulletin","link":"https:\/\/www.mercator-ocean.eu\/fr\/bulletin\/bulletin-des-glaces-de-mer-de-lantarctique-mars-2025\/","title":{"rendered":"Bulletin sur la glace de mer de l&rsquo;Antarctique Mars 2025"},"content":{"rendered":"<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><div class=\"wp-block-columns has-text-color is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\" style=\"color:#000000\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><div class=\"wp-block-columns has-content-bg-alt-background-color has-text-color has-background is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\" style=\"color:#070707\"><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:2%\"><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:96%\"><div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"wp-block-heading has-text-align-center\">Principaux enseignements<\/h2><h6 class=\"wp-block-heading\"><strong>Antarctique<\/strong><\/h6><ul class=\"wp-block-list\"><li>L&rsquo;\u00e9tendue de la glace de mer dans l&rsquo;oc\u00e9an Austral a probablement atteint le minimum annuel&nbsp;le<sup>25<\/sup> f\u00e9vrier avec 1,87 million de<sup>km2 &#8211; <\/sup>8% de moins que la moyenne \u00e0 long terme de 1993-2010 (2,40 millions de km<sup> 2)<\/sup>&nbsp;<\/li><li>En 2025, l&rsquo;\u00e9tendue minimale annuelle de la glace de mer dans l&rsquo;Antarctique est la<sup>7e <\/sup>plus faible jamais enregistr\u00e9e, tout comme en 2024. &nbsp;<\/li><li>Le volume de glace de mer a atteint 1,03 mille&nbsp;km\u00b3, soit une perte de 56 % (1,36 mille km\u00b3) par rapport \u00e0 la moyenne \u00e0 long terme entre 1993 et 2010. Cette valeur est proche des records historiques de 2022 et 2023.&nbsp;<\/li><\/ul><div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:2%\"><\/div><\/div><\/div><\/div><div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"wp-block-heading has-text-align-center\">\u00c9tendue minimale de la glace de mer en Antarctique<\/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 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-vertically-aligned-top 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 is-resized\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/antarctic-with-seas-2.png\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/antarctic-with-seas-2-694x700.png\" alt=\"\" class=\"wp-image-37898\" style=\"width:553px;height:557px\"\/><\/a><\/figure><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG7_GLO12V4_curve_sie_sh_1993-2025_20250311-1-2.png\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG7_GLO12V4_curve_sie_sh_1993-2025_20250311-1-2-875x700.png\" alt=\"\" class=\"wp-image-37900\" style=\"width:621px;height:498px\"\/><\/a><\/figure><\/div><\/div><p><em>Figure 1. \u00c0 gauche : \u00e9tendue de la glace de mer antarctique (rouge) pour le 25 f\u00e9vrier 2025. La ligne noire repr\u00e9sente la moyenne \u00e0 long terme 1993-2010 (climatologie) pour le m\u00eame jour de l&rsquo;ann\u00e9e. A droite : L&rsquo;\u00e9tendue quotidienne de la glace de mer en Antarctique pour la p\u00e9riode 1993-2025.&nbsp;Data : Syst\u00e8mes mondiaux de pr\u00e9vision et de r\u00e9analyse \u00e0 1\/12\u00b0.<\/em>*<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><p><\/p><\/div><\/div><p class=\"has-large-font-size\">L&rsquo;\u00e9tendue de la<strong> glace de mer antarctique reste faible<\/strong>&nbsp;<\/p><p>L&rsquo;\u00e9tendue de la glace de mer antarctique a probablement atteint son minimum le 25 f\u00e9vrier 2025, avec&nbsp;1,87 million de km\u00b2. Il s&rsquo;agit de la septi\u00e8me \u00e9tendue la plus faible (\u00e0 \u00e9galit\u00e9 avec 2024) au cours des 32 derni\u00e8res ann\u00e9es, apr\u00e8s 2020, 2018, 2017, 2019, 1993 et 1997.&nbsp;2025 est la deuxi\u00e8me ann\u00e9e cons\u00e9cutive au cours de laquelle&nbsp;la glace de mer de l&rsquo;Antarctique a atteint un minimum inf\u00e9rieur \u00e0 2,0 millions de km\u00b2.&nbsp;<\/p><p>La majeure partie de la glace qui a r\u00e9sist\u00e9 \u00e0 la fonte se trouve dans la mer de Weddell. D&rsquo;autres zones \u00e9galement couvertes de glace de mer se trouvent pr\u00e8s de&nbsp;les c\u00f4tes de la mer de Bellingshausen, de la terre de Wilkes et de la terre d&rsquo;Amery, et au large des mers d&rsquo;Amundsen et de Ross (figure 1).&nbsp;Les cinq minimums \u00e9tablis depuis 2017 sont les cinq \u00e9tendues les plus faibles sur une p\u00e9riode de 32 ans d&rsquo;enregistrements satellitaires.&nbsp;<\/p><p><\/p><figure class=\"wp-block-image aligncenter size-large is-resized\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG8_GLO12V4_histo_anosie_sh_1993-2025_20250311-1.png\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG8_GLO12V4_histo_anosie_sh_1993-2025_20250311-1-875x700.png\" alt=\"\" class=\"wp-image-37915\" style=\"width:625px;height:500px\"\/><\/a><figcaption class=\"wp-element-caption\">&nbsp;<br\/><em>Figure 2. Anomalie quotidienne de l&rsquo;\u00e9tendue des glaces de la mer Antarctique entre 1993 et 2025 (en utilisant la moyenne 1993-2010). Donn\u00e9es : Syst\u00e8mes mondiaux de pr\u00e9vision et de r\u00e9analyse \u00e0 1\/12\u00b0.<\/em>*<\/figcaption><\/figure><div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"wp-block-heading has-text-align-center\">Volume de la glace de mer antarctique<\/h2><figure class=\"wp-block-image aligncenter size-large is-resized\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG9_GLO12V4_curve_siv_sh_1993-2025_20250311.png\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG9_GLO12V4_curve_siv_sh_1993-2025_20250311-1-875x700.png\" alt=\"\" class=\"wp-image-37911\" style=\"width:765px;height:612px\"\/><\/a><figcaption class=\"wp-element-caption\"><em>Figure 3. Volume quotidien de glace de mer en Antarctique pour la p\u00e9riode 1993-2025.<\/em>Donn\u00e9es<strong>:<\/strong><em>syst\u00e8mes mondiaux de pr\u00e9vision et de r\u00e9analyse \u00e0 1\/12\u00b0.<\/em><\/figcaption><\/figure><p class=\"has-large-font-size\"> Le volume de la glace de mer antarctique atteint un niveau presque record<\/p><p>Le volume de la glace de mer antarctique a atteint un niveau presque record en 2025, avec un minimum de 1,03 milliers de km\u00b3 le 5&nbsp;mars 2025.&nbsp;Ces derni\u00e8res ann\u00e9es, le volume minimum de glace de mer dans la r\u00e9gion a tendance&nbsp;\u00e0 durer jusqu&rsquo;au d\u00e9but de la saison printani\u00e8re&nbsp;de l&rsquo;h\u00e9misph\u00e8re nord en mars (saison automnale dans l&rsquo;h\u00e9misph\u00e8re sud).&nbsp;<\/p><p>La perte de 56% du volume de glace de mer cette ann\u00e9e, par rapport \u00e0 la moyenne \u00e0 long terme pour la m\u00eame date (2,39 milliers de km\u00b3) suit les traces des quatre derni\u00e8res ann\u00e9es exceptionnelles, qui ont montr\u00e9 de tr\u00e8s faibles volumes de glace de mer.La r\u00e9cente s\u00e9rie de faibles \u00e9tendue et volume de glace de mer depuis 2017 interroge sur l&rsquo;existence d&rsquo;un d\u00e9clin significatif sur cette courte p\u00e9riode de temps.&nbsp;<\/p><figure class=\"wp-block-image aligncenter size-large is-resized\"><a href=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG10_GLO12V4_histo_anosiv_sh_1993-2025_20250311.png\"><img decoding=\"async\" src=\"https:\/\/www.mercator-ocean.eu\/wp-content\/uploads\/2025\/03\/FIG10_GLO12V4_histo_anosiv_sh_1993-2025_20250311-1-875x700.png\" alt=\"\" class=\"wp-image-37913\" style=\"width:618px;height:494px\"\/><\/a><figcaption class=\"wp-element-caption\"><em><em>Figure 4.<\/em><strong><\/strong><em>Anomalie quotidienne du volume de glace de mer antarctique pour la p\u00e9riode 1993-2025 (sur la base de la climatologie 1993-2010). Syst\u00e8mes mondiaux de pr\u00e9vision et de r\u00e9analyse \u00e0 1\/12\u00b0.<\/em><strong> * <\/strong>&nbsp;<\/em><\/figcaption><\/figure><div style=\"height:59px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><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:40%\"><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:20%\"><hr class=\"wp-block-separator has-css-opacity aligncenter\"\/><\/div><div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:40%\"><\/div><\/div><div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h2 class=\"wp-block-heading has-text-align-center\"><\/h2><div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><div class=\"wp-block-columns are-vertically-aligned-center has-text-color has-background is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\" style=\"color:#2c2c2c;background-color:#f1f1f1\"><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\"><\/div><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:80%\"><div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><h6 class=\"wp-block-heading\"><strong><em>D\u00e9finitions :<\/em><\/strong><\/h6><ul class=\"wp-block-list\"><li>Concentration de glace de mer &#8211; pourcentage de la couverture de glace de mer dans la cellule de la grille de donn\u00e9es.&nbsp;<\/li><li>\u00c9tendue de glace de mer &#8211; zone couverte par une quantit\u00e9 significative de glace de mer, au moins 15 % de la concentration de glace de mer (km\u00b2).&nbsp;&nbsp;<\/li><li>Volume de glace de mer &#8211; d\u00e9riv\u00e9 de la concentration de glace de mer et de l&rsquo;\u00e9paisseur de glace de mer int\u00e9gr\u00e9 sur une zone respective (km \u00b3).&nbsp;<\/li><\/ul><h6 class=\"wp-block-heading\"><strong><em>Notes :<\/em><\/strong><\/h6><p><em>Produits et donn\u00e9es utilis\u00e9s :&nbsp;<\/em><\/p><ul class=\"wp-block-list\"><li> GLORYS12V1 r\u00e9analyse oc\u00e9anique globale \u00e0 r\u00e9solution tourbillonnaire (r\u00e9solution horizontale de 1\/12\u00b0, 50 niveaux verticaux) couvrant l&rsquo;altim\u00e9trie (\u00e0 partir de 1993). <a href=\"https:\/\/doi.org\/10.48670\/moi-00021\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.48670\/moi-00021<\/a>&nbsp;<\/li><li>Syst\u00e8me op\u00e9rationnel d&rsquo;analyse et de pr\u00e9vision oc\u00e9anique globale \u00e0 1\/12\u00b0. https:\/\/doi. <a href=\"https:\/\/doi.org\/10.48670\/moi-00016\" target=\"_blank\" rel=\"noreferrer noopener\">org\/10.48670\/moi-00016<\/a>&nbsp;&nbsp;<\/li><\/ul><h6 class=\"wp-block-heading\"><strong><em>Cr\u00e9dits :<\/em><\/strong><\/h6><p>*<em>Citation de l&rsquo;image : Union europ\u00e9enne, Copernicus Marine Service Data 2025 I \u00a9 Mercator Ocean&nbsp;<br\/>Toutes les images de cet article peuvent \u00eatre utilis\u00e9es librement et doivent \u00eatre cit\u00e9es avec les informations ci-dessus.<\/em><\/p><h6 class=\"wp-block-heading\"><strong><em>Plus d&rsquo;informations sur le sujet :&nbsp;&nbsp;<\/em><\/strong><\/h6><p><a href=\"https:\/\/www.mercator-ocean.eu\/en\/news\/sea-ice-extent-2024\/\">2023 a \u00e9t\u00e9 une ann\u00e9e inhabituelle pour l&rsquo;\u00e9tendue de la glace de mer. Que peut-on attendre des glaces de mer de l&rsquo;Arctique et de l&rsquo;Antarctique cette saison ?<\/a>&#8211;<a href=\"https:\/\/www.mercator-ocean.eu\/en\/news\/antarctic-sea-ice-minumum-september-2023\/\">Mercator<\/a><a href=\"https:\/\/www.mercator-ocean.eu\/en\/news\/sea-ice-extent-2024\/\">Ocean (mercator-ocean.eu)<\/a><\/p><p><a href=\"https:\/\/www.mercator-ocean.eu\/en\/news\/antarctic-sea-ice-minumum-september-2023\/\">La glace de mer antarctique atteint des niveaux jamais observ\u00e9s auparavant &#8211; Mercator Ocean (mercator-ocean.eu)<\/a><\/p><p><a href=\"https:\/\/www.mercator-ocean.eu\/sea-ice-bulletin\/arctic-sea-ice-bulletin-march-2024\/\" target=\"_blank\" rel=\"noreferrer noopener\">Bulletin sur la glace de mer arctique mars 2024<\/a>&nbsp;<\/p><p><a href=\"https:\/\/www.mercator-ocean.eu\/sea-ice-bulletin\/antarctic-sea-ice-bulletin-february-2024\/\">Bulletin sur la glace de mer antarctique f\u00e9vrier 2024<\/a><\/p><p><a href=\"https:\/\/marine.copernicus.eu\/ocean-climate-portal\/antarctic-sea-ice-extent\">\u00c9tendue de la glace de mer antarctique | CMEMS (copernicus.eu)<\/a><\/p><div style=\"height:15px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div><\/div><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\"><\/div><\/div><\/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\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>Principaux enseignements Antarctique \u00c9tendue minimale de la glace de mer en Antarctique Figure 1. \u00c0 gauche : \u00e9tendue de la glace de mer antarctique (rouge) pour le 25 f\u00e9vrier 2025. La ligne noire repr\u00e9sente la moyenne \u00e0 long terme 1993-2010 (climatologie) pour le m\u00eame jour de l&rsquo;ann\u00e9e. A droite : L&rsquo;\u00e9tendue quotidienne de la glace [&hellip;]<\/p>\n","protected":false},"featured_media":15537,"template":"","categories":[2471,2262],"bulletin-templates":[],"bulletins-type":[2411],"translation-status":[2454],"class_list":["post-16491","bulletin","type-bulletin","status-publish","has-post-thumbnail","hentry","category-nouvelles-de-locean","category-sea-ice-bulletin-fr","bulletins-type-glace-marine"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bulletin sur la glace de mer de l&#039;Antarctique Mars 2025 - 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\/bulletin-des-glaces-de-mer-de-lantarctique-mars-2025\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bulletin sur la glace de mer de l&#039;Antarctique Mars 2025 - Mercator Ocean International\" \/>\n<meta property=\"og:description\" content=\"Principaux enseignements Antarctique \u00c9tendue minimale de la glace de mer en Antarctique Figure 1. \u00c0 gauche : \u00e9tendue de la glace de mer antarctique (rouge) pour le 25 f\u00e9vrier 2025. 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