{"id":15421,"date":"2017-06-21T20:00:10","date_gmt":"2017-06-21T18:00:10","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=15421"},"modified":"2017-06-11T09:59:25","modified_gmt":"2017-06-11T07:59:25","slug":"de-nouveaux-paysages-explores-sous-lantarctique","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/de-nouveaux-paysages-explores-sous-lantarctique\/","title":{"rendered":"De nouveaux paysages explor\u00e9s sous l&rsquo;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>Il y a des millions d&rsquo;ann\u00e9es, l&rsquo;Antarctique avait un climat tropical et \u00e9tait aussi chaud&nbsp;que&nbsp;la Californie et la&nbsp;Floride de nos jours. Aujourd&rsquo;hui, ce continent glac\u00e9&nbsp;est presque enti\u00e8rement recouvert de couches de glace \u00e9paisse, mais un environnement bien diff\u00e9rent&nbsp;a exist\u00e9.<\/p>\n<p>\u00c0 l&rsquo;aide de la technologie des radars et des satellites a\u00e9roport\u00e9s, les scientifiques ont cartographi\u00e9 une s\u00e9rie de lacs et de rivi\u00e8res qui forment une zone humide sous la glace, dont la structure influence encore le flux d&rsquo;eau de l&rsquo;Antarctique et indirectement la mont\u00e9e de la mer.<\/p>\n<p>En 2013 , des scientifiques ont perc\u00e9 la glace pour examiner les s\u00e9diments et d&rsquo;autres mat\u00e9riaux dans le lac Whillans qui ont \u00e9t\u00e9 pi\u00e9g\u00e9s sous 2 600 pieds de glace pendant des milliers d&rsquo;ann\u00e9es.<\/p>\n<p>L&rsquo;eau du lac Whillans provient principalement de la glace fondue, mais le lac poss\u00e8de \u00e9galement de l&rsquo;eau de mer provenant de s\u00e9diments marins anciens trouv\u00e9s sur le lit du lac. Le lac d&rsquo;eau douce s&rsquo;\u00e9coule p\u00e9riodiquement dans l&rsquo;oc\u00e9an, mais n&rsquo;est pas assez puissant&nbsp;pour transporter tous les s\u00e9diments.<\/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>\u00ab\u00a0Il est \u00e9tonnant de penser que nous ne savions pas que ce lac existait jusqu&rsquo;\u00e0 il y a dix ans. Il est excitant de voir un ensemble de donn\u00e9es aussi riche du lac, et ces nouvelles donn\u00e9es nous aident \u00e0 comprendre comment les lacs fonctionnent dans le cadre du syst\u00e8me de la banquise\u00a0\u00bb, a d\u00e9clar\u00e9 Helen Amanda Fricker , chercheuse dans le projet d&rsquo;exploration et la personne qui a d\u00e9couvert le Lake Whillans \u00e0 partir de donn\u00e9es satellitaires en 2007.<\/p>\n<p>Les petites poches d&rsquo;eau de mer influent sur la biog\u00e9ochimie de l&rsquo;Antarctique et la compr\u00e9hension de la dynamique du terrain sous-glaciaire&nbsp;peuvent permettre aux scientifiques de mieux pr\u00e9dire les changements \u00e0 long terme des couches de glace.<\/p>\n<p>Ces \u00e9tudes ne sont que le d\u00e9but, car il existe environ 400 lacs sous les glaciers de l&rsquo;Antarctique.<\/p>\n<p>Traduction et adaptation de <a href=\"http:\/\/www.laterredufutur.com\/accueil\/\">TDF<\/a><\/p>\n<p>source : <a href=\"http:\/\/www.theepochtimes.com\/n3\/2053437-new-landscape-explored-beneath-the-ice-of-antarctica\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.theepochtimes.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"15421\">(795)<\/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>Il y a des millions d&rsquo;ann\u00e9es, l&rsquo;Antarctique avait un climat tropical et \u00e9tait aussi chaud&nbsp;que&nbsp;la Californie et la&nbsp;Floride de nos&#8230;<\/p>\n","protected":false},"author":1,"featured_media":15422,"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":"De nouveaux paysages explor\u00e9s sous l'Antarctique @laterredufutur","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":[33,20],"tags":[1252,2438,41,6455,114,267,157,2891],"class_list":["post-15421","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archeologie","category-climat","tag-antarctique","tag-archeologie","tag-climat","tag-couches-de-glace","tag-geologie","tag-glace","tag-glaciers","tag-lacs","wpcat-33-id","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/06\/antarctique-sans-glace.jpg?fit=676%2C450&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-40J","jetpack-related-posts":[{"id":2709,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-mystere-du-lac-vostok\/","url_meta":{"origin":15421,"position":0},"title":"Le myst\u00e8re du lac Vostok","author":"Admin","date":"22 f\u00e9vrier 2005","format":false,"excerpt":"Avant la glace. Situ\u00e9 au coeur du supercontinent Gondwana, temp\u00e9r\u00e9 et humide, l'Antartique est devenu une masse distincte voici 70 millions d'ann\u00e9es. La roche m\u00e9re (bedrock) de l'antartique oriental remonte \u00e0 3 milliards d'ann\u00e9es et compte parmis les plus anciennes du globe. Form\u00e9 d'un puzzle complexe de blocs crustaux et\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\/spaw\/images\/suite41.jpg?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":15421,"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":3427,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-rivieres-relieraient-des-lacs-sous-la-glace-de-lantarctique\/","url_meta":{"origin":15421,"position":2},"title":"Des rivi\u00e8res relieraient des lacs sous la glace de l&rsquo;Antarctique","author":"Admin","date":"24 avril 2006","format":false,"excerpt":"LONDRES (Reuters) - Des rivi\u00e8res larges comme la Tamise, qui relient sans doute des lacs subglaciaires, ont \u00e9t\u00e9 d\u00e9couvertes sous la calotte du continent antarctique. Les chercheurs britanniques qui ont mis au jour le syst\u00e8me de connexions expliquant le d\u00e9placement de l'eau sur des centaines de kilom\u00e8tres estiment que leur\u2026","rel":"","context":"Dans &quot;Divers&quot;","block_context":{"text":"Divers","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/divers\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"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":15421,"position":3},"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":7791,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-palmiers-decouverts-sous-les-glaces-de-lantarctique\/","url_meta":{"origin":15421,"position":4},"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":12015,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-nouveau-lac-subglaciaire-geant-decouvert-en-antarctique\/","url_meta":{"origin":15421,"position":5},"title":"Un nouveau lac subglaciaire g\u00e9ant d\u00e9couvert en Antarctique","author":"Admin","date":"29 avril 2016","format":false,"excerpt":"Apr\u00e8s le lac Vostok, des chercheurs pourraient avoir d\u00e9couvert le second plus grand lac subglaciaire du continent blanc. Les scientifiques ont l\u2019espoir que celui-ci contienne des traces de vie pr\u00e9historique. L\u2019activit\u00e9 g\u00e9othermale en dessous du lac l\u2019aurait emp\u00each\u00e9 de geler et aurait permis qu\u2019il reste sous forme liquide. Situ\u00e9e \u00e0\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\/2016\/04\/glace-antarctique.jpg?fit=1000%2C541&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/glace-antarctique.jpg?fit=1000%2C541&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/glace-antarctique.jpg?fit=1000%2C541&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/04\/glace-antarctique.jpg?fit=1000%2C541&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15421","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=15421"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15421\/revisions"}],"predecessor-version":[{"id":15423,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15421\/revisions\/15423"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/15422"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=15421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=15421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=15421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}