{"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\/sv\/space_radar_reveals_antarctic_rivers\/","title":{"rendered":"Rymdradar avsl\u00f6jar floder i Antarktis"},"content":{"rendered":"<div class=\"lede\">\n<p>Forskare har i \u00e5rtionden k\u00e4nt till att det finns m\u00e5nga enorma sj\u00f6ar g\u00f6mda under Antarktis frusna \u00f6demarker. Man har dock vanligtvis antagit att sj\u00f6arna var isolerade. Nu har en europeisk radarsatellit, kallad ERS-2, visat att floder under isen kan transportera enorma m\u00e4ngder \u00f6versv\u00e4mningsvatten fr\u00e5n en sj\u00f6 till en annan.<\/p>\n<\/div>\n<p>Uppt\u00e4ckten gjordes av brittiska forskare som analyserade f\u00f6r\u00e4ndringar i isskalans yth\u00f6jd. Mycket exakta radarm\u00e4tningar av yth\u00f6jden visade att isen ovanf\u00f6r en sj\u00f6 hade sjunkit med cirka tre meter. Tv\u00e5hundranittio kilometer d\u00e4rifr\u00e5n, ovanf\u00f6r tv\u00e5 olika subglaciala sj\u00f6ar, hade isen buktat upp\u00e5t.<\/p>\n<p>Dessa f\u00f6r\u00e4ndringar i isens h\u00f6jd kan f\u00f6rklaras om en flod lika stor som Themsen i London fl\u00f6t under den 4 km tjocka ist\u00e4cken. Under en period p\u00e5 16 m\u00e5nader str\u00f6mmade cirka 1,8 kubikkilometer vatten genom en tunnel som huggits ut i den fasta isen<\/p>\n<p>\u201cDe h\u00e4r nya uppgifterna visar att sj\u00f6arna under isen d\u00e5 och d\u00e5 spricker som champagnekorkar och sl\u00e4pper ut flodv\u00e5gor som f\u00e4rdas mycket l\u00e5nga str\u00e4ckor\u201d, sade professor Duncan Wingham (University College, London).<\/p>\n<p>\u201cEn stor oro har varit att nya mikrober skulle inf\u00f6ras genom borrning ner till sj\u00f6arna\u201d, sade professor Wingham. \u201cV\u00e5ra data visar att en eventuell f\u00f6rorening inte kommer att begr\u00e4nsas till en enda sj\u00f6, utan med tiden kommer att sprida sig l\u00e4ngs hela flodn\u00e4tverket.\u201d.<\/p>\n<p>\u201cVi hade betraktat dessa sj\u00f6ar som isolerade biologiska laboratorier. Nu m\u00e5ste vi t\u00e4nka 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\/sv\/wp-json\/wp\/v2\/posts\/1024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=1024"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1024\/revisions"}],"predecessor-version":[{"id":2167,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/1024\/revisions\/2167"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=1024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=1024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=1024"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=1024"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=1024"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=1024"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=1024"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=1024"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=1024"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=1024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}