{"id":995,"date":"2007-06-13T09:10:00","date_gmt":"2007-06-13T07:10:00","guid":{"rendered":"https:\/\/kids.esa.int\/envisat_guides_polar_explorers_to_safety\/"},"modified":"2026-10-08T00:34:39","modified_gmt":"2026-10-07T22:34:39","slug":"envisat_guides_polar_explorers_to_safety","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fr\/envisat_guides_polar_explorers_to_safety\/","title":{"rendered":"Envisat guide les explorateurs polaires dans leur p\u00e9riple"},"content":{"rendered":"<div class=\"lede\">\n<p>Le 1er mars 2007, Alain Hubert et Dixie Dansercoer sont partis pour une travers\u00e9e de l'Arctique, depuis la Sib\u00e9rie jusqu'au Groenland. Trois mois plus tard, apr\u00e8s avoir affront\u00e9 de nombreux dangers et fr\u00f4l\u00e9 des catastrophes, leur marche de 2000 km sur la glace se termine gr\u00e2ce \u00e0 Envisat, l'oeil de l'ESA en orbite dans le ciel.<\/p>\n<\/div>\n<p>Au d\u00e9but, tout s'est bien pass\u00e9, malgr\u00e9 les conditions extr\u00eamement rudes, dangereuses et ext\u00e9nuantes. Puis, les glaces ont commenc\u00e9 \u00e0 se fracturer alors que les deux explorateurs s'approchaient de la c\u00f4te groenlandaise. Ils n'avaient pas le choix. Ils leur fallait se frayer un passage entre les chenaux des zones d'eaux libres.<\/p>\n<figure class=\"wp-block-image size-natural\" data-width=\"400\" data-credit=\"Leif Toudal Pedersen, Danish National Space Centre, Danish Technical University\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/06\/Sea_ice_in_Nares_Strait_between_Greenland_and_Canada2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2007\/06\/sea_ice_in_nares_strait_between_greenland_and_canada2\/17868931-2-eng-GB\/Sea_ice_in_Nares_Strait_between_Greenland_and_Canada.jpg\" alt=\"Sea ice in Nares Strait between Greenland and Canada\"><figcaption>La banquise dans le d\u00e9troit de Nares, entre le Groenland et le Canada<\/figcaption><\/figure>\n<p>Heureusement, ils ont pu compter sur l'aide de deux instruments embarqu\u00e9s \u00e0 bord d'Envisat : le radar tout temps et l'instrument optique MERIS. En analysant minutieusement les images satellites montrant l'\u00e9volution de l'\u00e9tat de la glace, Leif Toudal Pedersen (Centre spatial national danois) a pu aider les explorateurs \u00e0 \u00e9viter la banquise qui se d\u00e9sagr\u00e9geait rapidement.<\/p>\n<p>Alain Hubert et Dixie Dansercoer sont maintenant sur de la glace stable. Il leur reste moins de 50 km \u00e0 parcourir et la c\u00f4te groenlandaise est bien en vue \u00e0 l'horizon. Les deux voyageurs audacieux devraient arriver \u00e0 la fin de leur p\u00e9riple \u00e0 travers tout le bassin arctique \u00e0 la fin de cette semaine.<\/p>\n<p>Leur difficile exp\u00e9dition sur les glaces de l'oc\u00e9an arctique, connue sous le nom de\" The Arctic Arc \", est l'une des nombreuses activit\u00e9s scientifiques organis\u00e9es dans le cadre de l'ann\u00e9e polaire internationale. Les deux explorateurs, qui n'en sont pas \u00e0 leur premi\u00e8re exp\u00e9rience polaire, \u00e9taient particuli\u00e8rement int\u00e9ress\u00e9s par la collecte de donn\u00e9es sur l'\u00e9paisseur du manteau neigeux. Ces informations seront utilis\u00e9es pour pr\u00e9parer la mission CryoSat-2 de l'ESA, dont le lancement est pr\u00e9vu en 2009.<\/p>","protected":false},"excerpt":{"rendered":"<p>On 1 March 2007, Alain Hubert and Dixie Dansercoer set off on a remarkable expedition to walk from Siberia to Greenland. Three months later, after many dangers and near-disasters, their [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"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,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2007\/06\/struggling_over_rough_sea-ice_during_the_arctic_arc_expedition2\/17906237-2-eng-GB\/Struggling_over_rough_sea-ice_during_the_Arctic_Arc_expedition.jpg","esa_banner_description":"Struggling over rough sea-ice during the Arctic Arc expedition","esa_banner_credit":"Arctic Arc 2007 - International Polar Foundation","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2007\/06\/Struggling_over_rough_sea-ice_during_the_Arctic_Arc_expedition2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[42,10,66],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-995","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-water-world"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/comments?post=995"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/995\/revisions"}],"predecessor-version":[{"id":4786,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/posts\/995\/revisions\/4786"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/media?parent=995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/categories?post=995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/tags?post=995"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/panel?post=995"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/language?post=995"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/age?post=995"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/duration?post=995"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/resource_type?post=995"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/audience?post=995"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fr\/wp-json\/wp\/v2\/wf_post_folders?post=995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}