{"id":26537,"date":"2025-01-14T12:00:22","date_gmt":"2025-01-14T11:00:22","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=26537"},"modified":"2025-01-13T13:01:39","modified_gmt":"2025-01-13T12:01:39","slug":"de-la-glace-vieille-de-plus-dun-million-dannees-extraite-en-antarctique","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/de-la-glace-vieille-de-plus-dun-million-dannees-extraite-en-antarctique\/","title":{"rendered":"De la glace vieille de plus d&rsquo;un million d&rsquo;ann\u00e9es extraite en Antarctique"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Des scientifiques, parmi lesquels des Fran\u00e7ais, ont for\u00e9 dans les profondeurs de la calotte glaciaire pour retrouver cette glace contenant des informations cruciales pour conna\u00eetre l&rsquo;histoire climatique de notre plan\u00e8te. Ils ont ainsi repouss\u00e9 le pr\u00e9c\u00e9dent record de 400 000 ans.<\/p>\n<p>Plus on fore profond, plus on remonte dans le temps, raconte l&rsquo;un des scientifiques de l\u2019\u00e9quipe de recherche europ\u00e9enne qui a particip\u00e9 \u00e0 un record : l\u2019extraction de glace vieille d\u20191,2 million d\u2019ann\u00e9es. \u00ab\u00a0Avec un carottier, on vient forer la glace en partant de la surface et en descendant de plus en plus profond jusqu\u2019\u00e0 atteindr le socle rocheux sous-glaciaire qui se trouve \u00e0 l\u2019endroit qu\u2019on a choisi, \u00e0, \u00e0 peu pr\u00e8s, 2 800 m\u00e8tres de profondeur\u00a0\u00bb, d\u00e9taille le glaciologue Fr\u00e9d\u00e9ric Parrenin.<\/p>\n<p>Pour atteindre de telles profondeurs il a fallu plus de 200 jours d&rsquo;op\u00e9rations de forages. \u00ab\u00a0Cette carotte est ensuite remont\u00e9e en surface, poursuit Fr\u00e9d\u00e9ric Parrenin, et ensuite d\u00e9coup\u00e9e et analys\u00e9e\u00a0\u00bb. Les scientifiques sont rest\u00e9s mobilis\u00e9s pendant quatre \u00e9t\u00e9s pr\u00e8s de la base de recherche Concordia. \u00ab\u00a0C\u2019est un contexte quand m\u00eame un petit peu extr\u00eame au niveau des conditions puisqu\u2019on se trouve quasiment au sommet de la calotte antarctique, raconte le scientifique. Cocordia se trouve \u00e0 plus de 3 200 m\u00e8tres d\u2019altitude\u00a0\u00bb.<\/p>\n<p>\u00ab\u00a0On y va pendant la saison estivale parce que les temp\u00e9ratures sont un petit peu plus cl\u00e9mentes mais elles d\u00e9passent rarement les -30 degr\u00e9s.\u00a0\u00bb<\/p>\n<p>Des efforts qui ont pay\u00e9 puisque la glace qu&rsquo;ils ont pu extraire est vieille d&rsquo;au moins 1,2 million d\u2019ann\u00e9es. Le pr\u00e9c\u00e9dent record remontait \u00e0 \u00ab\u00a0seulement\u00a0\u00bb 800 000 ans.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>https:\/\/twitter.com\/OldestIce\/status\/1877301942415659015?ref_src=twsrc%5Etfw%7Ctwcamp%5Etweetembed%7Ctwterm%5E1877301942415659015%7Ctwgr%5E38a2014f0327b2b813e0acc6d92f7e534fb46803%7Ctwcon%5Es1_&#038;ref_url=https%3A%2F%2Fwww.francetvinfo.fr%2Fsciences%2Frecord-battu-en-antarctique-des-chercheurs-europeens-ont-extrait-de-la-glace-vieille-de-plus-d-un-million-d-annees_7007822.html<\/p>\n<p>Pour le pal\u00e9oclimatologue de l&rsquo;institut des g\u00e9osciences de Grenoble, ces \u00e9chantillons sont comme un thermom\u00e8tre de cette p\u00e9riode au climat agit\u00e9. \u00ab\u00a0Il y a d\u2019autres archives pal\u00e9oclimatiques, notamment les s\u00e9diments marins mais ce que les carottes de glace apportent en plus, c\u2019est qu\u2019elles ont emprisonn\u00e9 des petites bulles d\u2019air qui sont des \u00e9chantillons de l\u2019atmosph\u00e8re pass\u00e9e. Il suffit d\u2019analyser ces bulles d\u2019air pour reconstruire la composition de l\u2019atmosph\u00e8re pass\u00e9e, par exemple les teneurs en CO2. Une des hypoth\u00e8ses c\u2019est que le CO2 d\u00e9j\u00e0 \u00e0 l\u2019\u00e9poque jouait un r\u00f4le sur le climat\u00a0\u00bb, explique Fr\u00e9d\u00e9ric Parrenin.<\/p>\n<p>Ces carottes de glace mill\u00e9naires vont maintenant quitter l&rsquo;Antarctique, direction les laboratoires europ\u00e9ens. Elles pourront ainsi nous en apprendre davantage sur le climat d&rsquo;aujourd&rsquo;hui.<\/p>\n<p>Source : <a href=\"https:\/\/www.francetvinfo.fr\/sciences\/record-battu-en-antarctique-des-chercheurs-europeens-ont-extrait-de-la-glace-vieille-de-plus-d-un-million-d-annees_7007822.html\" target=\"_blank\">https:\/\/www.francetvinfo.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"26537\">(125)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Des scientifiques, parmi lesquels des Fran\u00e7ais, ont for\u00e9 dans les profondeurs de la calotte glaciaire pour retrouver cette glace contenant&#8230;<\/p>\n","protected":false},"author":1,"featured_media":20564,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[20],"tags":[1252,6642,938,233,2563],"class_list":["post-26537","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climat","tag-antarctique","tag-carotte","tag-climatique","tag-histoire","tag-profondeur","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/02\/antarctic.png?fit=551%2C553&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-6U1","jetpack-related-posts":[{"id":27717,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-forage-record-sous-la-glace-de-lantarctique-a-revele-une-grande-surprise\/","url_meta":{"origin":26537,"position":0},"title":"Un forage record sous la glace de l&rsquo;Antarctique a r\u00e9v\u00e9l\u00e9 une grande surprise","author":"Admin","date":"19 f\u00e9vrier 2026","format":false,"excerpt":"Des scientifiques affirment avoir for\u00e9 plus profond\u00e9ment que jamais sous la calotte glaciaire de l'Antarctique occidental, remontant jusqu'\u00e0 des millions d'ann\u00e9es en arri\u00e8re pour r\u00e9v\u00e9ler des signes indiquant qu'elle \u00e9tait autrefois, au moins en partie, un oc\u00e9an ouvert. Cette vaste \u00e9tendue contiendrait suffisamment de glace pour faire monter le niveau\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/02\/ocean-antarctique.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/02\/ocean-antarctique.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/02\/ocean-antarctique.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/02\/ocean-antarctique.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/02\/ocean-antarctique.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":24355,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-carotte-de-glace-capsule-temporelle-de-5-millions-dannees-extraite-en-antarctique\/","url_meta":{"origin":26537,"position":1},"title":"Une carotte de glace capsule temporelle de 5 millions d&rsquo;ann\u00e9es extraite en Antarctique","author":"Admin","date":"3 septembre 2022","format":false,"excerpt":"Une \u00e9quipe de scientifiques am\u00e9ricains a r\u00e9cemment dat\u00e9 ce qui pourrait \u00eatre la plus ancienne carotte de glace au monde, offrant un aper\u00e7u pr\u00e9cieux du climat terrestre il y a plusieurs millions d\u2019ann\u00e9es. UNE CAROTTE DE GLACE RECORD La capacit\u00e9 de conservation naturelle exceptionnelle de la glace dans des endroits\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/carotte-glace-antarctique.jpg?fit=1024%2C682&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/carotte-glace-antarctique.jpg?fit=1024%2C682&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/carotte-glace-antarctique.jpg?fit=1024%2C682&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/09\/carotte-glace-antarctique.jpg?fit=1024%2C682&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":27065,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-scientifiques-decouvrent-des-rivieres-geantes-disparues-depuis-longtemps-a-travers-lantarctique-il-y-a-80-millions-dannees\/","url_meta":{"origin":26537,"position":2},"title":"Des scientifiques d\u00e9couvrent des rivi\u00e8res g\u00e9antes disparues depuis longtemps \u00e0 travers l&rsquo;Antarctique il y a 80 millions d&rsquo;ann\u00e9es","author":"Admin","date":"2 ao\u00fbt 2025","format":false,"excerpt":"Selon une nouvelle \u00e9tude, de grandes surfaces planes sculpt\u00e9es par d'anciennes rivi\u00e8res profond\u00e9ment sous l'Antarctique oriental influencent la fa\u00e7on dont la glace s'\u00e9coule aujourd'hui sur le continent. Des scientifiques ont d\u00e9couvert un paysage perdu depuis longtemps, pr\u00e9serv\u00e9 sous la calotte glaciaire de l'Antarctique depuis 30 millions d'ann\u00e9es. L'\u00e9rosion caus\u00e9e par\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":16382,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-thermometre-a-remonter-le-temps-pour-les-oceans\/","url_meta":{"origin":26537,"position":3},"title":"Un thermom\u00e8tre \u00e0 remonter le temps pour les oc\u00e9ans","author":"Admin","date":"17 mars 2018","format":false,"excerpt":"Reconstituer la temp\u00e9rature globale des oc\u00e9ans dans le pass\u00e9, un d\u00e9fi impossible? Des scientifiques suisses y sont parvenus en \u00e9tudiant les bulles d\u2019air contenues dans les glaces \u00e9ternelles de l\u2019Antarctique. Les oc\u00e9ans sont des acteurs incontournables du climat mondial. Leur capacit\u00e9 \u00e0 stocker la chaleur, en particulier, est bien plus\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/03\/carotte-glaciaire.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/03\/carotte-glaciaire.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/03\/carotte-glaciaire.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/03\/carotte-glaciaire.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/03\/carotte-glaciaire.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":26552,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-deformations-geantes-de-lere-glaciaire-decouvertes-dans-les-profondeurs-de-la-mer-du-nord-sont-revelees-avec-des-details-etonnants\/","url_meta":{"origin":26537,"position":4},"title":"Les d\u00e9formations g\u00e9antes de l&rsquo;\u00e8re glaciaire d\u00e9couvertes dans les profondeurs de la mer du Nord sont r\u00e9v\u00e9l\u00e9es avec des d\u00e9tails \u00e9tonnants","author":"Admin","date":"24 janvier 2025","format":false,"excerpt":"De nouvelles images de la mer du Nord montrent des reliefs jamais vus qui ont \u00e9t\u00e9 sculpt\u00e9s par une calotte glaciaire unique et colossale il y a un million d'ann\u00e9es et qui ont ensuite \u00e9t\u00e9 ensevelis sous une \u00e9paisse couche de boue. Des chercheurs ont d\u00e9couvert d'immenses reliefs dans les\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/05\/20000ans-age-de-glace.jpg?fit=1000%2C678&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/05\/20000ans-age-de-glace.jpg?fit=1000%2C678&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/05\/20000ans-age-de-glace.jpg?fit=1000%2C678&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/05\/20000ans-age-de-glace.jpg?fit=1000%2C678&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":25322,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-paysage-fige-dans-le-temps-decouvert-sous-la-glace-de-lantarctique\/","url_meta":{"origin":26537,"position":5},"title":"Un paysage \u00ab fig\u00e9 dans le temps \u00bb d\u00e9couvert sous la glace de l&rsquo;Antarctique","author":"Admin","date":"31 octobre 2023","format":false,"excerpt":"Un ancien r\u00e9seau fluvial qui n'avait pas vu la lumi\u00e8re du jour depuis au moins 14 millions d'ann\u00e9es a \u00e9t\u00e9 d\u00e9couvert sous l'inlandsis de l'Antarctique de l'Est, selon de nouvelles recherches. \u00c0 l'aide d'un radar \u00e0 p\u00e9n\u00e9tration de glace et de donn\u00e9es satellitaires, Stewart Jamieson, glaciologue \u00e0 l'universit\u00e9 de Durham,\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/10\/relief-de-l-antarctique.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/26537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=26537"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/26537\/revisions"}],"predecessor-version":[{"id":26538,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/26537\/revisions\/26538"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/20564"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=26537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=26537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=26537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}