{"id":606,"date":"2015-04-15T22:30:05","date_gmt":"2015-04-15T20:30:05","guid":{"rendered":"http:\/\/www.dubochet.ch\/jacques\/?p=606"},"modified":"2015-09-17T21:55:12","modified_gmt":"2015-09-17T19:55:12","slug":"velage-2","status":"publish","type":"post","link":"https:\/\/www.dubochet.ch\/jacques\/?p=606","title":{"rendered":"V\u00ealage (ou: quand l&rsquo;\u00e9chauffement climatique fait son cin\u00e9ma)"},"content":{"rendered":"<p>Commen\u00e7ez par regarder cet extrait du film \u00ab\u00a0<a href=\"http:\/\/www.chasingice.com\/\">Chasing Ice<\/a>,\u00a0\u00bb de Adam LeWinter et Jeff Orlowski montrant le plus grand \u00e9v\u00e8nement de rupture de langue glaciaire report\u00e9 jusqu&rsquo;ici. Il a eu lieu le 28 mai 2008 \u00e0 l&#8217;embouchure du glacier Ilulissat, sur la c\u00f4te ouest du Groenland. En 75 minutes, le glacier d&rsquo;environ 1000 m d&rsquo;\u00e9paisseur a recul\u00e9 de 1,5 km sur un front de 5 km.<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"Zw4XKh20NB\"><p><a href=\"https:\/\/earthsky.org\/earth\/video-largest-glacier-calving-ever-caught-on-film\/\">Video: Largest glacier calving ever caught on film<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;Video: Largest glacier calving ever caught on film&#8221; &#8212; EarthSky\" src=\"https:\/\/earthsky.org\/earth\/video-largest-glacier-calving-ever-caught-on-film\/embed\/#?secret=3SjsMyKTXE#?secret=Zw4XKh20NB\" data-secret=\"Zw4XKh20NB\" width=\"500\" height=\"282\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<p>Le Lieu:<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-glacier-au-Groenland.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-610\" src=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-glacier-au-Groenland.png?resize=497%2C183&#038;ssl=1\" alt=\"Le glacier au Groenland\" width=\"497\" height=\"183\" srcset=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-glacier-au-Groenland.png?w=497&amp;ssl=1 497w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-glacier-au-Groenland.png?resize=300%2C110&amp;ssl=1 300w\" sizes=\"auto, (max-width: 497px) 100vw, 497px\" \/><\/a><\/p>\n<p>Le retrait:<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-retrait-du-glacier.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-609\" src=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-retrait-du-glacier.png?resize=502%2C285&#038;ssl=1\" alt=\"Le retrait du glacier\" width=\"502\" height=\"285\" srcset=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-retrait-du-glacier.png?w=658&amp;ssl=1 658w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Le-retrait-du-glacier.png?resize=300%2C171&amp;ssl=1 300w\" sizes=\"auto, (max-width: 502px) 100vw, 502px\" \/><\/a><\/p>\n<p><!--more-->Ceci vu, mettons en contexte.<\/p>\n<p>Nous le savons bien, nos glaciers fichent le camp. Ces deux photos, au fond du val d&rsquo;H\u00e9rens, sont espac\u00e9es de 6 ann\u00e9es (ao\u00fbt 2005-ao\u00fbt 2011). La 3e est de cette ann\u00e9e, lors de la grande canicule.<\/p>\n<p>ao\u00fbt 2005 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0ao\u00fbt 2011<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Capture-d%E2%80%99%C3%A9cran-2015-04-15-%C3%A0-22.29.30.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-613\" src=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Capture-d%E2%80%99%C3%A9cran-2015-04-15-%C3%A0-22.29.30.png?resize=587%2C184&#038;ssl=1\" alt=\"Capture d\u2019\u00e9cran 2015-04-15 \u00e0 22.29.30\" width=\"587\" height=\"184\" srcset=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Capture-d%E2%80%99%C3%A9cran-2015-04-15-%C3%A0-22.29.30.png?w=587&amp;ssl=1 587w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Capture-d%E2%80%99%C3%A9cran-2015-04-15-%C3%A0-22.29.30.png?resize=300%2C94&amp;ssl=1 300w\" sizes=\"auto, (max-width: 587px) 100vw, 587px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>8 ao\u00fbt 2015\u00a0<img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-680\" src=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/08\/IMG_2233-Version-2.jpg?resize=259%2C197&#038;ssl=1\" alt=\"IMG_2233 - Version 2\" width=\"259\" height=\"197\" srcset=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/08\/IMG_2233-Version-2.jpg?resize=1024%2C781&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/08\/IMG_2233-Version-2.jpg?resize=300%2C229&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/08\/IMG_2233-Version-2.jpg?w=1144&amp;ssl=1 1144w\" sizes=\"auto, (max-width: 259px) 100vw, 259px\" \/><\/p>\n<p>En 1980 le glacier du Mont Min\u00e9 et celui\u00a0de Ferp\u00e8cle \u00e9taient encore fusionn\u00e9s. \u00a0La photo\u00a0d&rsquo;ao\u00fbt 1985, montre le glacier de Ferp\u00e8cle (\u00e0 g.)\u00a0qui a commenc\u00e9 \u00e0 se retirer dans son vallon. Le glacier du Mt.Min\u00e9 (\u00e0 dr.) barre encore presque la vall\u00e9e.<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Num%C3%A9riser-1.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-618\" src=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Num%C3%A9riser-1.jpg?resize=604%2C356&#038;ssl=1\" alt=\"Num\u00e9riser-1\" width=\"604\" height=\"356\" srcset=\"https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Num%C3%A9riser-1.jpg?resize=1024%2C604&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Num%C3%A9riser-1.jpg?resize=300%2C177&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.dubochet.ch\/jacques\/wp-content\/uploads\/2015\/04\/Num%C3%A9riser-1.jpg?w=2000&amp;ssl=1 2000w\" sizes=\"auto, (max-width: 604px) 100vw, 604px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>Au Groenland, les glaciers sont plus grands et leur recul a des effets plus spectaculaires. Le d\u00e9versement de leur glace dans l&rsquo;oc\u00e9an produit les icebergs. En anglais, on parle de calving, v\u00ealage. Le spectacle est impressionnant et des voyagistes savent en profiter en y promenant des touristes.<\/p>\n<p>voir par exemple: http:\/\/www.mostwatchedtoday.com\/tag\/glacier-calving\/<\/p>\n<p>Quelquefois, certains glaciers semblent se mettre en crise et coulent beaucoup plus vite que de coutume. Comment, pourquoi? Le ph\u00e9nom\u00e8ne n&rsquo;est pas pleinement compris, mais la question prend toute son acuit\u00e9 avec l&rsquo;\u00e9chauffement climatique. Il arrive alors que le v\u00ealage prenne la\u00a0forme d&rsquo;une catastrophe, comme l&rsquo;illustre le film pr\u00e9sent\u00e9 ci-dessus. En voici un autre exemple, pas mal non plus.<\/p>\n<p>Helheim Glacier sur la c\u00f4te est du Groenland<\/p>\n<p>http:\/\/www.livescience.com\/31989-major-glacier-calving-captured-in-time-lapse-video-video.html<\/p>\n<p>Cette ann\u00e9e encore, 49 s\u00e9nateurs US (sur 100) ont affirm\u00e9 leur conviction que l&rsquo;\u00e9chauffement climatique est une plaisanterie (et 51 on affirm\u00e9 que si \u00e9chauffement climatique il y a, ce n&rsquo;est en tous cas pas notre faute). Ici, nous ne sommes pas si b\u00eates.<\/p>\n<p>Mais que fait-on?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Commen\u00e7ez par regarder cet extrait du film \u00ab\u00a0Chasing Ice,\u00a0\u00bb de Adam LeWinter et Jeff Orlowski montrant le plus grand \u00e9v\u00e8nement de rupture de langue glaciaire report\u00e9 jusqu&rsquo;ici. Il a eu lieu le 28 mai 2008 \u00e0 l&#8217;embouchure du glacier Ilulissat, sur la c\u00f4te ouest du Groenland. En 75 minutes, le glacier d&rsquo;environ 1000 m d&rsquo;\u00e9paisseur [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":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":[89],"tags":[110,54,53,185],"class_list":["post-606","post","type-post","status-publish","format-standard","hentry","category-science-actualite","tag-climat","tag-echauffement-climatique","tag-environnement","tag-glacier"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=\/wp\/v2\/posts\/606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=606"}],"version-history":[{"count":0,"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=\/wp\/v2\/posts\/606\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dubochet.ch\/jacques\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}