{"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\/nb\/space_radar_reveals_antarctic_rivers\/","title":{"rendered":"Romradar avsl\u00f8rer elver i Antarktis"},"content":{"rendered":"<div class=\"lede\">\n<p>Forskere har i flere ti\u00e5r visst om de mange enorme innsj\u00f8ene som ligger skjult under Antarktis\u2019 frosne \u00f8demarker. Man har imidlertid vanligvis antatt at innsj\u00f8ene var isolerte. N\u00e5 har en europeisk radarsatellitt kalt ERS-2 vist at elver under isen kan f\u00f8re enorme mengder flomvann fra \u00e9n innsj\u00f8 til en annen.<\/p>\n<\/div>\n<p>Oppdagelsen ble gjort av britiske forskere som analyserte endringer i isdekketets overflateh\u00f8yde. Sv\u00e6rt n\u00f8yaktige radarm\u00e5linger av overflateh\u00f8yden viste at isen over en innsj\u00f8 hadde sunket med omtrent tre meter. To hundre og nitti kilometer unna, over to forskjellige subglaciale innsj\u00f8er, hadde isen buet seg oppover.<\/p>\n<p>Disse endringene i isens h\u00f8yde kan forklares dersom en elv s\u00e5 stor som Themsen i London str\u00f8mmet under det 4 km tykke isdekket. Over en periode p\u00e5 16 m\u00e5neder str\u00f8mmet rundt 1,8 kubikkilometer vann gjennom en tunnel som var sk\u00e5ret ut i fast is<\/p>\n<p>\u201cDisse nye dataene viser at innsj\u00f8ene under isen av og til spretter opp som champagnekorker og utl\u00f8ser flom som sprer seg over sv\u00e6rt lange avstander,\u201d sa professor Duncan Wingham (University College, London).<\/p>\n<p>\u201cEn stor bekymring har v\u00e6rt at man ved \u00e5 bore ned til innsj\u00f8ene ville f\u00f8re inn nye mikrober,\u201d sa professor Wingham. \u201cV\u00e5re data viser at en eventuell forurensning ikke vil v\u00e6re begrenset til \u00e9n innsj\u00f8, men over tid vil spre seg langs hele elvenettverket.\u00bb.<\/p>\n<p>\u201cVi hadde sett p\u00e5 disse innsj\u00f8ene som isolerte biologiske laboratorier. N\u00e5 m\u00e5 vi tenke 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\/nb\/wp-json\/wp\/v2\/posts\/1024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/comments?post=1024"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1024\/revisions"}],"predecessor-version":[{"id":2167,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/posts\/1024\/revisions\/2167"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/media?parent=1024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/categories?post=1024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/tags?post=1024"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/panel?post=1024"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/language?post=1024"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/age?post=1024"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/duration?post=1024"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/resource_type?post=1024"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/audience?post=1024"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/nb\/wp-json\/wp\/v2\/wf_post_folders?post=1024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}