{"id":15323,"date":"2017-06-16T20:00:43","date_gmt":"2017-06-16T18:00:43","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil\/?p=15323"},"modified":"2017-06-04T09:23:53","modified_gmt":"2017-06-04T07:23:53","slug":"les-temperatures-etaient-plus-hautes-pendant-lholocene","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/les-temperatures-etaient-plus-hautes-pendant-lholocene\/","title":{"rendered":"Les temp\u00e9ratures \u00e9taient plus hautes pendant l\u2019Holoc\u00e8ne"},"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>La plan\u00e8te continue lentement de se r\u00e9chauffer et les scientifiques cherchent des exemples produits par le pass\u00e9 pour pr\u00e9dire les changements de climat dans le futur. Les scientifiques ont affirm\u00e9 que d\u00e8s la fin de la derni\u00e8re p\u00e9riode glaciaire (8 000 \u00e0 11 000 ans en arri\u00e8re), les temp\u00e9ratures \u00e9taient l\u00e9g\u00e8rement plus hautes qu\u2019elles ne le sont aujourd\u2019hui.<\/p>\n<p>Certes, nous faisons encore partie de l\u2019\u00e9poque g\u00e9ologique dite de l\u2019Holoc\u00e8ne qui s\u2019\u00e9tend d\u2019aujourd\u2019hui \u00e0 11 700 ans en arri\u00e8re. Mais notre \u00e9poque moderne ne repr\u00e9sente qu\u2019une tr\u00e8s petite partie de cette grande \u00e9poque g\u00e9ologique et les r\u00e9sultats suivants ne doivent pas prendre en compte la hausse des temp\u00e9ratures subie depuis un si\u00e8cle et demi.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"15324\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/les-temperatures-etaient-plus-hautes-pendant-lholocene\/holocene\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/holocene.gif?fit=491%2C237&amp;ssl=1\" data-orig-size=\"491,237\" 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=\"holocene\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/holocene.gif?fit=491%2C237&amp;ssl=1\" class=\"alignnone size-full wp-image-15324\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/holocene.gif?resize=491%2C237\" alt=\"\" width=\"491\" height=\"237\"\/><\/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>D\u00e8s les ann\u00e9es&nbsp;1980, des chercheurs d\u2019une \u00e9quipe internationale avaient analys\u00e9 des carottes de glace pr\u00e9lev\u00e9es sur&nbsp;l\u2019\u00eele d\u2019Ellesmere, au nord du Canada. Les analyses ont permis de montrer que durant l\u2019Holoc\u00e8ne, les temp\u00e9ratures \u00e9taient plus \u00e9lev\u00e9es qu\u2019aujourd\u2019hui. Les analyses ont continu\u00e9 depuis et une revue de&nbsp;<a href=\"http:\/\/www.pnas.org\/content\/early\/2017\/05\/15\/1616287114\">Proceedings of the National Academy of Sciences<\/a> a consacr\u00e9 un article sur leurs travaux afin de les exposer&nbsp;et de d\u00e9montrer en quoi ils&nbsp;pourraient aider \u00e0 mieux envisager le futur de notre plan\u00e8te \u00e0 cause du r\u00e9chauffement climatique. Leurs \u00e9tudes ont montr\u00e9 que le r\u00e9chauffement climatique agit \u00e0 diff\u00e9rentes \u00e9chelles dans diff\u00e9rents coins du globe et que les changements les plus flagrants se d\u00e9roulent en Arctique.<\/p>\n<p>Leurs analyses se sont port\u00e9es sur&nbsp;l\u2019extraction de carottes de glaces dans la calotte glaciaire d\u2019Agassiz, sur l\u2019\u00eele d\u2019Ellesmere au nord du Canada. De par leurs propri\u00e9t\u00e9s de formation de la glace, leurs compos\u00e9s et \u00e9l\u00e9ments chimiques, ces carottes de glace aident \u00e0 construire un sch\u00e9ma d\u2019\u00e9volution du climat sur un intervalle de temps. Les carottes de glace ont \u00e9t\u00e9 extraites \u00e0 un kilom\u00e8tre&nbsp;de profondeur, ce qui permet aux chercheurs de faire des analyses plus distantes dans le temps.<\/p>\n<p>extrait et source&nbsp;<a href=\"http:\/\/sciencepost.fr\/2017\/05\/carotte-de-glace-montre-temperatures-etaient-plus-hautes-pendant-lholocene\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/sciencepost.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"15323\">(1574)<\/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>La plan\u00e8te continue lentement de se r\u00e9chauffer et les scientifiques cherchent des exemples produits par le pass\u00e9 pour pr\u00e9dire les&#8230;<\/p>\n","protected":false},"author":1,"featured_media":15325,"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":"Les #temp\u00e9ratures \u00e9taient plus hautes pendant l\u2019#Holoc\u00e8ne @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":[31],"tags":[3536,1802,2068,4074,169],"class_list":["post-15323","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","tag-aujourdhui","tag-epoque","tag-graphique","tag-holocene","tag-rechauffement-climatique","wpcat-31-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/05\/holocene.jpg?fit=308%2C164&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-3Z9","jetpack-related-posts":[{"id":5748,"url":"https:\/\/www.laterredufutur.com\/accueil\/bienvenue-dans-lanthropocene-un-nouveau-monde-geologique\/","url_meta":{"origin":15323,"position":0},"title":"Bienvenue dans l&rsquo;Anthropoc\u00e8ne, un nouveau monde g\u00e9ologique","author":"Admin","date":"28 mars 2011","format":false,"excerpt":"Les cons\u00e9quences des activit\u00e9s humaines sur la plan\u00e8te sont telles que des scientifiques ont jug\u00e9 bon de changer d'\u00e9poque g\u00e9ologique et de proclamer la fin d'un monde... Si la g\u00e9ologie s\u2019int\u00e9resse aux transformations actuelles et pass\u00e9es subies par la Terre, la stratigraphie d\u00e9termine quant \u00e0 elle les \u00e2ges g\u00e9ologiques de\u2026","rel":"","context":"Dans &quot;Monde Futur&quot;","block_context":{"text":"Monde Futur","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/monde-futur\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/Anthropocene.gif?fit=350%2C475&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":27613,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-immense-dome-de-glace-au-groenland-a-disparu-il-y-a-7-000-ans-fondant-a-des-temperatures-vers-lesquelles-nous-nous-dirigeons-aujourdhui\/","url_meta":{"origin":15323,"position":1},"title":"Un immense d\u00f4me de glace au Groenland a disparu il y a 7 000 ans, fondant \u00e0 des temp\u00e9ratures vers lesquelles nous nous dirigeons aujourd&rsquo;hui","author":"Admin","date":"8 janvier 2026","format":false,"excerpt":"Des scientifiques ont for\u00e9 jusqu'au fond du Prudhoe Dome, un d\u00f4me situ\u00e9 au Groenland et profond de 487 m\u00e8tres, et ont d\u00e9couvert qu'il avait disparu au d\u00e9but de l'Holoc\u00e8ne, lorsque les temp\u00e9ratures \u00e9taient proches de celles que nous pr\u00e9voyons d'atteindre d'ici la fin du si\u00e8cle. Une partie de la calotte\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\/2019\/01\/fonte-groenlandaise.jpg?fit=819%2C613&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/fonte-groenlandaise.jpg?fit=819%2C613&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/fonte-groenlandaise.jpg?fit=819%2C613&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/01\/fonte-groenlandaise.jpg?fit=819%2C613&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":24471,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-12-000-dernieres-annees-revelent-une-histoire-climatique-plus-complexe-quon-ne-le-pensait-jusqua-present\/","url_meta":{"origin":15323,"position":2},"title":"Les 12 000 derni\u00e8res ann\u00e9es r\u00e9v\u00e8lent une histoire climatique plus complexe qu&rsquo;on ne le pensait jusqu&rsquo;\u00e0 pr\u00e9sent","author":"Admin","date":"6 octobre 2022","format":false,"excerpt":"Une \u00e9quipe internationale de chercheurs d'Allemagne, du Royaume-Uni, de Suisse, du Canada et de France r\u00e9v\u00e8le la complexit\u00e9 de l'\u00e9volution des temp\u00e9ratures au cours des 12 000 derni\u00e8res ann\u00e9es. Dans cette nouvelle \u00e9tude, les scientifiques ont utilis\u00e9 la plus grande base de donn\u00e9es disponible sur les reconstructions de temp\u00e9ratures pass\u00e9es,\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\/2022\/10\/homme-age-de-pierre.jpg?fit=1000%2C625&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/10\/homme-age-de-pierre.jpg?fit=1000%2C625&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/10\/homme-age-de-pierre.jpg?fit=1000%2C625&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/10\/homme-age-de-pierre.jpg?fit=1000%2C625&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":21823,"url":"https:\/\/www.laterredufutur.com\/accueil\/nouvel-indice-qui-expliquerait-les-glaciations-depuis-2-6-millions-dannees\/","url_meta":{"origin":15323,"position":3},"title":"Nouvel indice qui expliquerait les glaciations depuis 2.6 millions d&rsquo;ann\u00e9es","author":"Admin","date":"15 janvier 2021","format":false,"excerpt":"La Terre est marqu\u00e9e par des cycles de glaciation. Chaque \u00e8re glaciaire \u00e9tant suivie d'une p\u00e9riode interglaciaire. Depuis quelque 2,6 millions d'ann\u00e9es, la Terre conna\u00eet des cycles de glaciation. Elle alterne entre des chutes drastiques de temp\u00e9rature, o\u00f9 une grande partie des continents s'englacent, et r\u00e9chauffement. Sans que les scientifiques\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\/2020\/02\/antarctique.jpg?fit=1024%2C768&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/02\/antarctique.jpg?fit=1024%2C768&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/02\/antarctique.jpg?fit=1024%2C768&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/02\/antarctique.jpg?fit=1024%2C768&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":5709,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-rechauffements-climatiques-du-passe\/","url_meta":{"origin":15323,"position":4},"title":"Les r\u00e9chauffements climatiques du pass\u00e9","author":"Admin","date":"23 f\u00e9vrier 2011","format":false,"excerpt":"Il y a des p\u00e9riodes de l\u2019histoire de la Terre avec une temp\u00e9rature plus chaude que l\u2019actuelle. Sans remonter \u00e0 des millions d\u2019ann\u00e9es, on peut citer les trois p\u00e9riodes \u00ab interglaciaires \u00bb qui ont pr\u00e9c\u00e9d\u00e9 la n\u00f4tre (dans les derniers 400 000 ans). La temp\u00e9rature \u00e9tait de plus de 2\u00b0C\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\/04\/rechauffement-du-passe.jpg?fit=435%2C290&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":13161,"url":"https:\/\/www.laterredufutur.com\/accueil\/lhomme-a-t-il-forge-lanthropocene-nouvelle-epoque-geologique-sur-la-terre\/","url_meta":{"origin":15323,"position":5},"title":"L&rsquo;Homme a-t-il forg\u00e9 l&rsquo;Anthropoc\u00e8ne, nouvelle \u00e9poque g\u00e9ologique sur la Terre?","author":"Admin","date":"5 septembre 2016","format":false,"excerpt":"La multiplication des cons\u00e9quences de notre action sur la plan\u00e8te, vu par des marqueurs g\u00e9ologiques, motive les scientifiques \u00e0 faire \u00e9voluer l'\u00e9chelle des temps g\u00e9ologiques connue. \"Le signal est tr\u00e8s clair et certains des changements sont effectivement irr\u00e9versibles.\" Le g\u00e9ologue Jan Zalasiewicz coordonne un groupe de 35 scientifiques qui a\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/08\/anthropocene.jpg?fit=1200%2C675&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/08\/anthropocene.jpg?fit=1200%2C675&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/08\/anthropocene.jpg?fit=1200%2C675&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/08\/anthropocene.jpg?fit=1200%2C675&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/08\/anthropocene.jpg?fit=1200%2C675&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15323","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=15323"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15323\/revisions"}],"predecessor-version":[{"id":15326,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/15323\/revisions\/15326"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/15325"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=15323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=15323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=15323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}