{"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\/fi\/envisat_guides_polar_explorers_to_safety\/","title":{"rendered":"Envisat johdattaa napaseikkailijat turvaan"},"content":{"rendered":"<div class=\"lede\">\n<p>1. maaliskuuta 2007 Alain Hubert ja Dixie Dansercoer l\u00e4htiv\u00e4t merkitt\u00e4v\u00e4lle retkelle, jonka tavoitteena oli k\u00e4vell\u00e4 Siperiasta Gr\u00f6nlantiin. Kolme kuukautta my\u00f6hemmin, monien vaarojen ja l\u00e4helt\u00e4 piti -tilanteiden j\u00e4lkeen, heid\u00e4n 2 000 kilometrin vaelluksensa j\u00e4isen er\u00e4maan halki on l\u00e4hestym\u00e4ss\u00e4 loppuaan, kiitos Envisatin, ESA:n kiertoradalla olevan silm\u00e4n.<\/p>\n<\/div>\n<p>Aluksi kaikki sujui hyvin, huolimatta \u00e4\u00e4rimm\u00e4isen ankarista, vaarallisista ja fyysisesti raskaista olosuhteista. Sitten merij\u00e4\u00e4 alkoi yll\u00e4tt\u00e4en murtua, kun kaksi belgialaista tutkimusmatkailijaa l\u00e4hestyi Gr\u00f6nlannin rannikkoa. Kaksikolla ei ollut muuta vaihtoehtoa kuin yritt\u00e4\u00e4 l\u00f6yt\u00e4\u00e4 reitti avomeren laajoista alueista.<\/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>Merij\u00e4\u00e4 Naresin salmessa Gr\u00f6nlannin ja Kanadan v\u00e4lill\u00e4<\/figcaption><\/figure>\n<p>Onneksi he pystyiv\u00e4t luottamaan Envisat-satelliitin kahden laitteen tukeen \u2013 s\u00e4\u00e4olosuhteista riippumattomaan tutka-anturiin ja optiseen MERIS-laitteeseen. Tutkiessaan huolellisesti satelliittikuvia muuttuvista j\u00e4\u00e4olosuhteista Leif Toudal Pedersen (Tanskan kansallinen avaruuskeskus) pystyi auttamaan tutkimusmatkailijoita v\u00e4ltt\u00e4m\u00e4\u00e4n nopeasti hajoavan j\u00e4\u00e4peitteen.<\/p>\n<p>Retkikunta on nyt vakaalla j\u00e4\u00e4ll\u00e4. Matkaa on j\u00e4ljell\u00e4 alle 50 km, ja edess\u00e4 avautuu selke\u00e4 n\u00e4kym\u00e4 Gr\u00f6nlantiin. Rohkeiden tutkimusmatkailijoiden odotetaan saavuttavan t\u00e4ll\u00e4 viikolla pitk\u00e4n vaelluksensa p\u00e4\u00e4tepisteen, joka ulottuu koko arktisen altaan yli.<\/p>\n<p>Heid\u00e4n uuvuttava matkansa j\u00e4\u00e4peitteisen J\u00e4\u00e4meren poikki, joka tunnetaan nimell\u00e4 Arctic Arc Expedition, on yksi monista kansainv\u00e4lisen polaarikuvuoden aikana toteutettavista tieteellisist\u00e4 hankkeista. Kaksi kokenutta naparetkeilij\u00e4\u00e4 oli erityisen kiinnostunut ker\u00e4\u00e4m\u00e4\u00e4n lumen syvyytt\u00e4 koskevia tietoja. N\u00e4it\u00e4 tietoja k\u00e4ytet\u00e4\u00e4n ESA:n CryoSat-2-lennon valmisteluun, jonka on m\u00e4\u00e4r\u00e4 l\u00e4hte\u00e4 kiertoradalle vuonna 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\/fi\/wp-json\/wp\/v2\/posts\/995","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=995"}],"version-history":[{"count":5,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/995\/revisions"}],"predecessor-version":[{"id":4786,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/995\/revisions\/4786"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=995"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=995"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=995"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=995"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=995"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=995"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=995"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=995"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=995"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=995"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}