{"id":20417,"date":"2020-02-09T17:00:17","date_gmt":"2020-02-09T16:00:17","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=20417"},"modified":"2020-01-23T15:55:38","modified_gmt":"2020-01-23T14:55:38","slug":"forages-en-antarctique-il-y-a-eu-des-changements-dramatiques-entre-les-periodes-chaudes-et-les-periodes-froides","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/forages-en-antarctique-il-y-a-eu-des-changements-dramatiques-entre-les-periodes-chaudes-et-les-periodes-froides\/","title":{"rendered":"Forages en Antarctique : Il y a eu des changements dramatiques entre les p\u00e9riodes chaudes et les p\u00e9riodes froides"},"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>L&rsquo;Antarctic Drilling Project (l&rsquo;ANDRILL) est un projet de forage scientifique dans l&rsquo;Antarctique qui a pour but de recueillir des informations sur les p\u00e9riodes chaudes et froides de la terre. Le projet n&rsquo;utilise pas le carottage classique de la glace (de mer), mais fore directement dans la couverture de glace. Une technique de forage sp\u00e9ciale a \u00e9t\u00e9 d\u00e9velopp\u00e9e \u00e0 cet effet :<\/p>\n<p>Pour relever ce d\u00e9fi unique, l&rsquo;\u00e9quipe de l&rsquo;ANDRILL a invent\u00e9 un nouvel outil, une perceuse \u00e0 eau chaude. Cette merveille de la technologie est un anneau thermique mobile qui \u00e9met des jets d&rsquo;eau fumants pour faire fondre un large trou afin que la foreuse puisse travailler librement \u00e0 travers 122 m\u00e8tres de glace en mouvement.<\/p>\n<p><iframe src=\"\/\/players.brightcove.net\/2540076170001\/B1Hli6KCG_default\/index.html?videoId=6120644737001\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>L&rsquo;Antarctique est le continent le plus au sud de la plan\u00e8te o\u00f9 se trouve le p\u00f4le Sud g\u00e9ographique et abrite quelque 1 000 scientifiques qui tentent de mieux comprendre l&rsquo;histoire de la Terre et les effets du changement climatique. Cependant, un programme, connu sous le nom de projet de forage en Antarctique (ANDRILL), est all\u00e9 plus loin en forant plus de 400 pieds dans la calotte glaciaire, r\u00e9v\u00e9lant un pass\u00e9 inattendu. Leur exp\u00e9rience a \u00e9t\u00e9 montr\u00e9e lors du documentaire \u00abLes secrets de l&rsquo;Antarctique\u00bb de NOVA, dans lequel ils esp\u00e9raient en savoir plus sur les p\u00e9riodes pass\u00e9es de r\u00e9chauffement et de refroidissement mondiaux.<\/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>Un trou de forage d&rsquo;environ 24 m\u00e8tres nous m\u00e8ne \u00e0 environ 3 millions d&rsquo;ann\u00e9es dans le pass\u00e9. Les donn\u00e9es ainsi recueillies sont ensuite examin\u00e9es avec soin.<\/p>\n<figure id=\"attachment_20418\" aria-describedby=\"caption-attachment-20418\" style=\"width: 590px\" class=\"wp-caption alignnone\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"20418\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/forages-en-antarctique-il-y-a-eu-des-changements-dramatiques-entre-les-periodes-chaudes-et-les-periodes-froides\/forages-antarctique\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?fit=590%2C350&amp;ssl=1\" data-orig-size=\"590,350\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"forages-antarctique\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Des scientifiques de l&amp;rsquo;Antarctique ont fait une d\u00e9couverte \u00e9tonnante (Image: GETTY \/ NOVA)&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?fit=300%2C178&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?fit=590%2C350&amp;ssl=1\" class=\"size-full wp-image-20418\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?resize=590%2C350&#038;ssl=1\" alt=\"\" width=\"590\" height=\"350\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?w=590&amp;ssl=1 590w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/forages-antarctique.jpg?resize=300%2C178&amp;ssl=1 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><figcaption id=\"caption-attachment-20418\" class=\"wp-caption-text\">Des scientifiques de l&rsquo;Antarctique ont fait une d\u00e9couverte \u00e9tonnante (Image: GETTY \/ NOVA)<\/figcaption><\/figure>\n<p>Un des r\u00e9sultats les plus importants de ces forages est que la terre subit des changements constants entre les p\u00e9riodes chaudes et froides. Dans certains cas, les variations ont \u00e9t\u00e9 spectaculaires et il y a eu des changements soudains entre les deux extr\u00eames. Un autre r\u00e9sultat est que dans certains cas, les temp\u00e9ratures \u00e9taient de quatre \u00e0 cinq degr\u00e9s plus \u00e9lev\u00e9es qu&rsquo;aujourd&rsquo;hui &#8211; sans qu&rsquo;aucun \u00eatre humain n&rsquo;en soit responsable.<\/p>\n<p>Les donn\u00e9es des forages confirment une fois de plus que le climat n&rsquo;est pas toujours influenc\u00e9 par l&rsquo;homme.<\/p>\n<p>sources : <a href=\"https:\/\/fr.sott.net\/article\/34757-Les-forages-en-Antarctique-le-confirment-Il-y-a-eu-des-changements-dramatiques-entre-les-periodes-chaudes-et-les-periodes-froides\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/fr.sott.net\/<\/a> \/ <a href=\"https:\/\/www.express.co.uk\/news\/science\/1225592\/antarctica-scientists-discovery-below-ice-andrill-south-pole-climate-change-drill-spt\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.express.co.uk\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"20417\">(1584)<\/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>L&rsquo;Antarctic Drilling Project (l&rsquo;ANDRILL) est un projet de forage scientifique dans l&rsquo;Antarctique qui a pour but de recueillir des informations&#8230;<\/p>\n","protected":false},"author":1,"featured_media":20419,"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":"#Forages en #Antarctique : Il y a eu des changements dramatiques entre les #p\u00e9riodes chaudes et les p\u00e9riodes froides @laterrdufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[20],"tags":[1252,154,41,881,153,710],"class_list":["post-20417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climat","tag-antarctique","tag-chaud","tag-climat","tag-cycles","tag-froid","tag-periodes","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/01\/antarctique.jpg?fit=1024%2C415&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-5jj","jetpack-related-posts":[{"id":7791,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-palmiers-decouverts-sous-les-glaces-de-lantarctique\/","url_meta":{"origin":20417,"position":0},"title":"Des palmiers d\u00e9couverts sous les glaces de l&rsquo;Antarctique !","author":"Admin","date":"30 ao\u00fbt 2015","format":false,"excerpt":"La th\u00e9orie de la d\u00e9rive des plaques tectoniques encore remise en question... la th\u00e9orie de l'hydroplaque renforc\u00e9e... Les forages scientifiques dans l'\u00e9paisse glace de Wilkes Land, en Antarctique de l' Est (la partie faisant face \u00e0 l'Australie) ont fourni les preuves de \" la croissance de for\u00eats tropicales caract\u00e9ris\u00e9es 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\/2015\/07\/palmier-sous-la-neige.gif?fit=499%2C314&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":4253,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-lac-vostok-a-4-000-metres-sous-les-glaces-bientot-atteint-par-les-russes\/","url_meta":{"origin":20417,"position":1},"title":"Le Lac Vostok \u00e0 4.000 m\u00e8tres sous les glaces bient\u00f4t atteint par les Russes","author":"Admin","date":"9 janvier 2008","format":false,"excerpt":"Le lac sous glaciaire de Vostok, localis\u00e9 sous la station russe qui lui a donn\u00e9 son nom, est grand comme la Corse et profond de plus de 1200 m. Sans doute existait-il d\u00e9j\u00e0 dans le rift profond (plus de 1000 m au-dessous du niveau de la mer) avant son confinement\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\/spaw\/images\/LakeVostok.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":27717,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-forage-record-sous-la-glace-de-lantarctique-a-revele-une-grande-surprise\/","url_meta":{"origin":20417,"position":2},"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":17208,"url":"https:\/\/www.laterredufutur.com\/accueil\/il-y-a-quelque-chose-de-chaud-cache-sous-lantarctique-oriental\/","url_meta":{"origin":20417,"position":3},"title":"Il y a quelque chose de chaud cach\u00e9 sous l&rsquo;Antarctique oriental","author":"Admin","date":"1 d\u00e9cembre 2018","format":false,"excerpt":"Il y a quelque chose de chaud cach\u00e9 sous l'Antarctique oriental et les scientifiques ne savent pas exactement de quoi il s'agit - bien qu'ils aient une certaine id\u00e9e. L'Antarctique de l'Est est un craton (du grec kratos - force) est une partie ancienne et stable de la lithosph\u00e8re continentale\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\/12\/antarctica-ice-sheet-1.jpg?fit=700%2C393&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/antarctica-ice-sheet-1.jpg?fit=700%2C393&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/antarctica-ice-sheet-1.jpg?fit=700%2C393&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/antarctica-ice-sheet-1.jpg?fit=700%2C393&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":15421,"url":"https:\/\/www.laterredufutur.com\/accueil\/de-nouveaux-paysages-explores-sous-lantarctique\/","url_meta":{"origin":20417,"position":4},"title":"De nouveaux paysages explor\u00e9s sous l&rsquo;Antarctique","author":"Admin","date":"21 juin 2017","format":false,"excerpt":"Il y a des millions d'ann\u00e9es, l'Antarctique avait un climat tropical et \u00e9tait aussi chaud\u00a0que\u00a0la Californie et la\u00a0Floride de nos jours. Aujourd'hui, ce continent glac\u00e9\u00a0est presque enti\u00e8rement recouvert de couches de glace \u00e9paisse, mais un environnement bien diff\u00e9rent\u00a0a exist\u00e9. \u00c0 l'aide de la technologie des radars et des satellites a\u00e9roport\u00e9s,\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\/2017\/06\/antarctique-sans-glace.jpg?fit=676%2C450&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/antarctique-sans-glace.jpg?fit=676%2C450&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/antarctique-sans-glace.jpg?fit=676%2C450&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3710,"url":"https:\/\/www.laterredufutur.com\/accueil\/lantarctique-se-refroidit-act-ii\/","url_meta":{"origin":20417,"position":5},"title":"L&rsquo;Antarctique se refroidit Act II","author":"Admin","date":"26 octobre 2006","format":false,"excerpt":"Voici donc de nouvelles mesures de la NOAA qui d\u00e9montrent que la masse la plus importante de l'Antarctique s'est bien refroidie entre 1982 \u00e0 2004... Cette image montre les tendances\u00a0des temperatures de surface\u00a0au\u00a0millim\u00e8tre sup\u00e9rieur des\u00a0temp\u00e9ratures de l'air. Les donn\u00e9es ont \u00e9t\u00e9 rassembl\u00e9es par des Sondes avanc\u00e9es de\u00a0tr\u00e8s haute r\u00e9solution du\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\/2015\/04\/Antarctica.jpeg?fit=540%2C450&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/Antarctica.jpeg?fit=540%2C450&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/Antarctica.jpeg?fit=540%2C450&ssl=1&resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/20417","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=20417"}],"version-history":[{"count":3,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/20417\/revisions"}],"predecessor-version":[{"id":20512,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/20417\/revisions\/20512"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/20419"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=20417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=20417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=20417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}