{"id":470752,"date":"2025-10-17T20:12:15","date_gmt":"2025-10-17T20:12:15","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/470752\/"},"modified":"2025-10-17T20:12:15","modified_gmt":"2025-10-17T20:12:15","slug":"la-terre-sest-recouverte-de-calottes-polaires-geantes-bien-plus-tot-quon-ne-limaginait","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/470752\/","title":{"rendered":"La Terre s\u2019est recouverte de calottes polaires g\u00e9antes bien plus t\u00f4t qu\u2019on ne l\u2019imaginait"},"content":{"rendered":"<p>\n    <strong>D\u00c9CRYPTAGE &#8211; <\/strong>Une \u00e9tude publi\u00e9e dans Science remet en question les connaissances sur les cycles glaciaires qu\u2019a connus la plan\u00e8te ces quatre derniers millions d\u2019ann\u00e9es.<\/p>\n<p class=\"fig-paragraph\">Depuis environ trois millions d\u2019ann\u00e9es, le climat est marqu\u00e9 par l\u2019alternance de p\u00e9riodes glaciaires et interglaciaires, qui entra\u00eenent des fluctuations spectaculaires du niveau mondial des oc\u00e9ans. La derni\u00e8re p\u00e9riode glaciaire s\u2019est achev\u00e9e il y a environ 11700 ans et nous sommes aujourd\u2019hui dans une p\u00e9riode interglaciaire, o\u00f9 seules deux calottes majeures,<a href=\"http:\/\/www.lefigaro.fr\/sciences\/presque-irreversible-la-preoccupante-et-trop-rapide-fonte-des-glaces-de-l-antarctique-20250820\" target=\"_blank\" data-fig-type=\"Article\" rel=\"noopener nofollow\" data-gtm-custom-categorie=\"navigation\" data-gtm-custom-action=\"crossclick\" data-gtm-custom-label=\"Contextuel\" data-gtm-event=\"customEventSPE\" data-fig-domain=\"LEFIGARO\">\u00a0l\u2019Antarctique<\/a>\u00a0et le\u00a0<a href=\"http:\/\/www.lefigaro.fr\/sciences\/degel-du-permafrost-fonte-de-la-banquise-a-quoi-ressemblera-le-grand-nord-a-la-fin-du-xxie-siecle-20250209\" target=\"_blank\" data-fig-type=\"Article\" rel=\"noopener nofollow\" data-gtm-custom-categorie=\"navigation\" data-gtm-custom-action=\"crossclick\" data-gtm-custom-label=\"Contextuel\" data-gtm-event=\"customEventSPE\" data-fig-domain=\"LEFIGARO\">Groenland subsistent en effet.\u00a0<\/a>Dans une\u00a0<a href=\"https:\/\/www.science.org\/doi\/10.1126\/science.adv8389#:~:text=1C)%20shows%20that%20GMSL%20was,ice%20sheets%20cannot%20be%20excluded.\" target=\"_blank\" rel=\"sponsored noopener nofollow\" data-gtm-custom-categorie=\"navigation\" data-gtm-custom-action=\"crossclick\" data-gtm-custom-label=\"Contextuel\" data-gtm-event=\"customEventSPE\">\u00e9tude publi\u00e9e dans la revue Science<\/a> , une \u00e9quipe internationale de chercheurs remonte le temps pour reconstituer ce que furent l\u2019\u00e9tendue des glaces et les changements de niveau des oc\u00e9ans associ\u00e9s sur les quatre derniers millions d\u2019ann\u00e9es.<\/p>\n<p class=\"fig-paragraph\">Les scientifiques se sont appuy\u00e9s sur l\u2019analyse des foraminif\u00e8res, des micro-organismes tr\u00e8s simples dot\u00e9s d\u2019une coquille et pr\u00e9sents dans presque tous les habitats marins, que l\u2019on collecte gr\u00e2ce \u00e0 des forages s\u00e9dimentaires dans les oc\u00e9ans. Ces minuscules coquillages sont autant de t\u00e9moins des climats pass\u00e9s. Lorsque leur coquille se forme\u2026<\/p>\n<p class=\"fig-premium-paywall__infos\">\n        Cet article est r\u00e9serv\u00e9 aux abonn\u00e9s.        Il vous reste 85% \u00e0 d\u00e9couvrir.\n    <\/p>\n<p>                <img  data- alt=\"Le Figaro\" class=\"fig-img--complete fig-img\"\/><\/p>\n<p class=\"fig-premium-paywall__title\">Vous avez envie de lire la suite ?<\/p>\n<p class=\"fig-premium-paywall__subtitle\">D\u00e9bloquez tous les articles imm\u00e9diatement.<\/p>\n<p class=\"fig-premium-paywall__connect\">\n                D\u00e9j\u00e0 abonn\u00e9\u00a0?                <a class=\"fig-premium-paywall__connect-link\" href=\"https:\/\/connect.lefigaro.fr\/login?client=horizon_web&amp;type=main&amp;redirect_uri=https%3A%2F%2Fwww.lefigaro.fr%2Fsciences%2Fla-terre-s-est-recouverte-de-calottes-polaires-geantes-bien-plus-tot-qu-on-ne-l-imaginait-20251017\" data-js-gtm=\"{&quot;customCategorie&quot;: &quot;conversion&quot;, &quot;customAction&quot;: &quot;before_Landing_Connexion_paywall_auto&quot;, &quot;customLabel&quot;: &quot;bGVmaWdhcm8uZnJfXzFmMGE5YzEzLWE1MGYtNjcyMC1iYzBlLTY1YzMwMzQ2NjdhZl9fQXJ0aWNsZQ==_La Terre s\u2019est recouverte de calottes polaires g\u00e9antes bien plus t\u00f4t qu\u2019on ne l\u2019imaginait_340&quot;, &quot;customIDSPE&quot;: &quot;bGVmaWdhcm8uZnJfXzFmMGE5YzEzLWE1MGYtNjcyMC1iYzBlLTY1YzMwMzQ2NjdhZl9fQXJ0aWNsZQ==&quot;, &quot;event&quot;: &quot;customEventSPE&quot;}\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n                    Connectez-vous<br \/>\n                <\/a>\n            <\/p>\n","protected":false},"excerpt":{"rendered":"D\u00c9CRYPTAGE &#8211; Une \u00e9tude publi\u00e9e dans Science remet en question les connaissances sur les cycles glaciaires qu\u2019a connus&hellip;\n","protected":false},"author":2,"featured_media":470753,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[5764,1129,1011,27,12687,52,43,40,41,39,42,44],"class_list":{"0":"post-470752","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-sciences-et-technologies","8":"tag-antarctique","9":"tag-climat","10":"tag-fr","11":"tag-france","12":"tag-oceans","13":"tag-planete","14":"tag-science","15":"tag-science-and-technology","16":"tag-sciences","17":"tag-sciences-et-technologies","18":"tag-technologies","19":"tag-technology"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fr\/115391335323295989","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/470752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/comments?post=470752"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/470752\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media\/470753"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media?parent=470752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/categories?post=470752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/tags?post=470752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}