{"id":1024,"date":"2006-05-02T08:28:00","date_gmt":"2006-05-02T06:28:00","guid":{"rendered":"https:\/\/kids.esa.int\/space_radar_reveals_antarctic_rivers\/"},"modified":"2026-10-08T00:35:00","modified_gmt":"2026-10-07T22:35:00","slug":"space_radar_reveals_antarctic_rivers","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/space_radar_reveals_antarctic_rivers\/","title":{"rendered":"Rumradar afsl\u00f8rer floder i Antarktis"},"content":{"rendered":"<div class=\"lede\">\n<p>Forskere har i \u00e5rtier vidst, at der gemmer sig mange enorme s\u00f8er under Antarktis\u2019 frosne \u00f8demarker. Man har dog normalt antaget, at s\u00f8erne var isolerede. Nu har en europ\u00e6isk radarsatellit ved navn ERS-2 vist, at floder under isen muligvis transporterer enorme m\u00e6ngder oversv\u00f8mmelsesvand fra den ene s\u00f8 til den anden.<\/p>\n<\/div>\n<p>Opdagelsen blev gjort af britiske forskere, der analyserede \u00e6ndringer i iskappeens overfladeh\u00f8jde. Ultrapr\u00e6cise radarm\u00e5linger af overfladeh\u00f8jden afsl\u00f8rede, at isen over en s\u00f8 var sunket med omkring tre meter. 290 kilometer derfra, over to forskellige subglaciale s\u00f8er, havde isen buet opad.<\/p>\n<p>Disse \u00e6ndringer i isens h\u00f8jde kan forklares, hvis en flod s\u00e5 stor som Themsen i London l\u00f8b under den 4 km tykke iskappe. Over en periode p\u00e5 16 m\u00e5neder str\u00f8mmede omkring 1,8 kubikkilometer vand gennem en tunnel, der var udhugget i den faste is<\/p>\n<p>\u201cDisse nye data viser, at s\u00f8erne under isen fra tid til anden springer op som champagnepropper og udl\u00f8ser oversv\u00f8mmelser, der breder sig over meget lange afstande,\u201d sagde professor Duncan Wingham (University College, London).<\/p>\n<p>\u201cEn af de st\u00f8rste bekymringer har v\u00e6ret, at der ved at bore ned til s\u00f8erne ville blive indf\u00f8rt nye mikrober,\u201d sagde professor Wingham. \u201cVores data viser, at en eventuel forurening ikke vil v\u00e6re begr\u00e6nset til \u00e9n s\u00f8, men med tiden vil brede sig ned ad hele flodnettet.\u00ab.<\/p>\n<p>\u201cVi havde betragtet disse s\u00f8er som isolerede biologiske laboratorier. Nu bliver vi n\u00f8dt til at t\u00e6nke om.\u201d<\/p>","protected":false},"excerpt":{"rendered":"<p>Scientists have known for decades about many huge lakes that hide beneath the frozen wastes of Antarctica. However, it has usually been assumed that the lakes were isolated. Now a [&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\/2006\/04\/the_dry_valleys_in_coastal_east_antarctica2\/17910935-2-eng-GB\/The_Dry_Valleys_in_coastal_East_Antarctica.jpg","esa_banner_description":"The Dry Valleys in coastal East Antarctica","esa_banner_credit":"David Sugden, Edinburgh University","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/04\/The_Dry_Valleys_in_coastal_East_Antarctica2","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-1024","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\/da\/wp-json\/wp\/v2\/posts\/1024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=1024"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1024\/revisions"}],"predecessor-version":[{"id":2167,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/1024\/revisions\/2167"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=1024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=1024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=1024"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=1024"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=1024"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=1024"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=1024"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=1024"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=1024"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=1024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}