{"id":71516,"date":"2025-10-03T12:00:00","date_gmt":"2025-10-03T12:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/senegal\/politique\/banquise-antarctique-atteint-niveau-historique-bas-4"},"modified":"2025-10-05T01:56:36","modified_gmt":"2025-10-05T01:56:36","slug":"banquise-antarctique-atteint-niveau-historique-bas-4","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4","title":{"rendered":"Banquise Antarctique Atteint Niveau Historique Bas"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Senegal. <\/strong><\/span>La banquise d\u2019hiver dans l\u2019Antarctique a atteint son troisie\u0300me plus bas niveau en pre\u0300s d\u2019un demi-sie\u0300cle d\u2019observation par satellite, ont annonce\u0301 le 30 septembre des chercheurs, soulignant l\u2019influence croissante du changement climatique sur le po\u0302le Sud.<\/p>\n<p>A chaque hiver de l\u2019he\u0301misphe\u0300re sud, l\u2019oce\u0301an autour de l\u2019Antarctique ge\u0300le sur des centaines de kilome\u0300tres au-dela\u0300 du continent, avec un pic ge\u0301ne\u0301ralement observe\u0301 en septembre ou octobre, avant le de\u0301but d\u2019un cycle de de\u0301gel. Cette anne\u0301e, la surface de glace semble avoir atteint son maximum le 17 septembre avec 17,81 millions de kilome\u0300tres carre\u0301s, selon des chiffres pre\u0301liminaires du Centre national ame\u0301ricain des donne\u0301es sur la neige et la glace de l\u2019universite\u0301 du Colorado a\u0300 Boulder.<\/p>\n<p>Le maximum de 2025 se classe donc au troisie\u0300me rang des plus bas niveaux enregistre\u0301s en 47 ans, derrie\u0300re le record de 2023 et la deuxie\u0300me place tenue par l\u2019hiver 2024. Jusqu\u2019en 2016, les mesures prises montraient \u00ab une augmentation irre\u0301gulie\u0300re mais le\u0301ge\u0300re au fil du temps \u00bb de la surface de glace de mer (ou banquise) dans l\u2019Antarctique, rele\u0300ve Ted Scambos, chercheur a\u0300 l\u2019universite\u0301 du Colorado a\u0300 Boulder. Mais, ajoute-t-il a\u0300 l\u2019AFP, \u00ab ce qui semble se produire, c\u2019est que la chaleur des oce\u0301ans se me\u0302le de\u0301sormais a\u0300 l\u2019eau la plus proche de l\u2019Antarctique \u00bb, ce qui signifie que le changement climatique a finalement rattrape\u0301 les mers gele\u0301es du continent austral.<\/p>\n<p><b>Plusieurs effets attendus<\/b><\/p>\n<p>La glace de mer n\u2019augmente pas le niveau de la mer lorsqu\u2019elle fond. Mais cette fonte a un impact sur le climat: le blanc de la glace re\u0301fle\u0301chit presque toute l\u2019e\u0301nergie solaire vers l\u2019espace, leur remplacement par une surface d\u2019eaux, plus sombre, participe au re\u0301chauffement climatique puisqu\u2019elle absorbe cette me\u0302me quantite\u0301 d\u2019e\u0301nergie sans la renvoyer.<\/p>\n<p>La banquise agit e\u0301galement comme un tampon, en empe\u0302chant la calotte glaciaire antarctique (la glace installe\u0301e sur le continent) de pe\u0301ne\u0301trer dans l\u2019oce\u0301an et d\u2019amplifier l\u2019e\u0301le\u0301vation du niveau de la mer. La fonte de la banquise pourrait aussi avoir un effet a priori paradoxal, souligne le scientifique Ted Scambos: \u00ab une augmentation des chutes de neige en Antarctique, car l\u2019air humide au-dessus de l\u2019oce\u0301an serait plus proche de la co\u0302te \u00bb de l\u2019Antarctique.<\/p>\n<p>Les donne\u0301es historiques montrent qu\u2019a\u0300 long terme, la calotte glaciaire se re\u0301tre\u0301cit inexorablement en cas de re\u0301chauffement climatique, pre\u0301cise ne\u0301anmoins Ted Scambos.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <span style=\"color: #ff6600\">Senegal<\/span>, suivez <span style=\"color: #ff6600\">Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Senegal. La banquise d\u2019hiver dans l\u2019Antarctique a atteint son troisie\u0300me plus bas niveau en pre\u0300s d\u2019un demi-sie\u0300cle d\u2019observation par satellite, ont annonce\u0301 le 30 septembre des chercheurs, soulignant l\u2019influence croissante du changement climatique sur le po\u0302le Sud. A chaque hiver de l\u2019he\u0301misphe\u0300re sud, l\u2019oce\u0301an autour de l\u2019Antarctique ge\u0300le sur des centaines de kilome\u0300tres [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":71515,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[44],"class_list":["post-71516","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-senegal-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Banquise Antarctique Atteint Niveau Historique Bas - Senegal<\/title>\n<meta name=\"description\" content=\"La banquise d\u2019hiver dans l\u2019Antarctique a atteint son troisie\u0300me plus bas niveau en pre\u0300s d\u2019un demi-sie\u0300cle d\u2019observation ...\" \/>\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.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Banquise Antarctique Atteint Niveau Historique Bas\" \/>\n<meta property=\"og:description\" content=\"La banquise d\u2019hiver dans l\u2019Antarctique a atteint son troisie\u0300me plus bas niveau en pre\u0300s d\u2019un demi-sie\u0300cle d\u2019observation ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\" \/>\n<meta property=\"og:site_name\" content=\"Senegal\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-03T12:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-05T01:56:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/10\/sm_1759656533.634848.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Banquise Antarctique Atteint Niveau Historique Bas\",\"datePublished\":\"2025-10-03T12:00:00+00:00\",\"dateModified\":\"2025-10-05T01:56:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\"},\"wordCount\":471,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/senegal\/sites\/13\/2025\/10\/sm_1759656533.634848.jpg\",\"keywords\":[\"Senegal\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\",\"url\":\"https:\/\/www.africa-press.net\/senegal\/toutes-les-actualites\/banquise-antarctique-atteint-niveau-historique-bas-4\",\"name\":\"Banquise Antarctique Atteint Niveau Historique Bas - 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