{"id":1857,"date":"2014-06-04T17:26:29","date_gmt":"2014-06-04T22:26:29","guid":{"rendered":"http:\/\/sciencemediacentre.ca\/site\/?p=1857"},"modified":"2014-06-04T17:26:29","modified_gmt":"2014-06-04T22:26:29","slug":"du-nouveau-pergelisol-se-forme-en-arctique-mais-il-fondra-dici-70-ans","status":"publish","type":"post","link":"http:\/\/sciencemediacentre.ca\/site\/du-nouveau-pergelisol-se-forme-en-arctique-mais-il-fondra-dici-70-ans\/","title":{"rendered":"Du nouveau perg\u00e9lisol se forme en Arctique&#8230; mais il fondra d\u2019ici 70 ans<img src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/01\/canada_flag_icon_small.gif\">"},"content":{"rendered":"<div id=\"attachment_1855\" style=\"width: 410px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/06\/Overhead-View1.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1855\" class=\"size-full wp-image-1855\" src=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/06\/Overhead-View1.jpg\" alt=\"Alors que lac Twelvemile en Alaska (ci-dessus) continue de r\u00e9tr\u00e9cir, du nouveau perg\u00e9lisol se forme sous les berges, notamment o\u00f9 des saules changent la composition du sol en eau. Des simulations informatiques pr\u00e9disent toutefois que ce nouveau perg\u00e9lisol fondra d\u2019ici la fin du si\u00e8cle. (Cr\u00e9dit: Martin Briggs)\" width=\"400\" height=\"300\" srcset=\"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/06\/Overhead-View1.jpg 400w, http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/06\/Overhead-View1-300x225.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><p id=\"caption-attachment-1855\" class=\"wp-caption-text\">Alors que lac Twelvemile en Alaska (ci-dessus) continue de r\u00e9tr\u00e9cir, du nouveau perg\u00e9lisol se forme sous les berges, notamment o\u00f9 des saules changent la composition du sol en eau. Des simulations informatiques pr\u00e9disent toutefois que ce nouveau perg\u00e9lisol fondra d\u2019ici la fin du si\u00e8cle. (Cr\u00e9dit: Martin Briggs)<\/p><\/div>\n<p><span style=\"color: #000000;\">Alors que les lacs arctiques r\u00e9duisent comme peau de chagrin, du nouveau perg\u00e9lisol se forme autour de ceux-ci. Une nouvelle \u00e9tude montre toutefois que ce perg\u00e9lisol fondra d\u2019ici la fin du si\u00e8cle. <\/span><\/p>\n<p><span style=\"color: #000000;\">Des chercheurs de l\u2019Universit\u00e9 McGill ont suivi la r\u00e9duction d\u2019un lac en Alaska et ont observ\u00e9 que du nouveau perg\u00e9lisol se forme autour de l\u2019ancien lit du lac, notamment pr\u00e8s des saules qui modifient la teneur en eau du sol. Le nouveau perg\u00e9lisol emp\u00eache l\u2019eau de s\u2019\u00e9chapper du lac et pr\u00e9vient donc son r\u00e9tr\u00e9cissement, mais ce perg\u00e9lisol n\u2019est pas aussi \u00e9pais que l\u2019ancien perg\u00e9lisol qui se trouve plus loin des lacs. <\/span><\/p>\n<p><span style=\"color: #000000;\">\u00c0 l\u2019aide de simulations informatiques, les auteurs de l\u2019\u00e9tude pr\u00e9disent que si la temp\u00e9rature de l\u2019air continue \u00e0 augmenter le nouveau perg\u00e9lisol aura<\/span>compl\u00e8tement fondu d\u2019ici 70 ans.<\/p>\n<p>Pour lire l\u2019article original publi\u00e9 dans\u00a0<em>Geophysical Research Letters\u00a0<\/em>le\u00a0<strong>7 mars\u00a0<\/strong><strong>2014<\/strong>,\u00a0<span style=\"text-decoration: underline;\"><span><a href=\"http:\/\/media.wiley.com\/PressRelease\/110915\/GRL_Permafrost_IR.pdf\" target=\"_blank\">cliquez\u00a0ici<\/a><\/span><\/span>.<\/p>\n<p><span style=\"text-decoration: underline;\"><span><em><strong>Auteur \u00e0 contacter pour plus d\u2019informations<\/strong><\/em><\/span><\/span><\/p>\n<p dir=\"ltr\" style=\"color: #222222;\"><span style=\"color: #000000;\">Jeff McKenzie, Universit\u00e9 McGill,\u00a0Quebec<\/span><\/p>\n<p dir=\"ltr\" style=\"color: #222222;\"><span style=\"color: #000000;\">Martin Briggs, Commission g\u00e9ologique am\u00e9ricaine (U.S. Geological Survey)<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Alors que les lacs arctiques r\u00e9duisent comme peau de chagrin, du nouveau perg\u00e9lisol se forme autour de ceux-ci. Une nouvelle \u00e9tude montre toutefois que ce perg\u00e9lisol fondra d\u2019ici la fin du si\u00e8cle. Des chercheurs de l\u2019Universit\u00e9 McGill ont suivi la r\u00e9duction d\u2019un lac en Alaska et ont observ\u00e9 que du nouveau perg\u00e9lisol se forme autour [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1855,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_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":""},"categories":[531],"tags":[388,683,842],"class_list":["post-1857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paper-of-interest-fr","tag-changements-climatiques","tag-environnement","tag-quebec"],"jetpack_featured_media_url":"http:\/\/sciencemediacentre.ca\/site\/wp-content\/uploads\/2014\/06\/Overhead-View1.jpg","jetpack_shortlink":"https:\/\/wp.me\/p4DqbN-tX","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/comments?post=1857"}],"version-history":[{"count":1,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1857\/revisions"}],"predecessor-version":[{"id":1858,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/posts\/1857\/revisions\/1858"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media\/1855"}],"wp:attachment":[{"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/media?parent=1857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/categories?post=1857"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/sciencemediacentre.ca\/site\/wp-json\/wp\/v2\/tags?post=1857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}