{"id":555,"date":"2013-12-13T08:49:00","date_gmt":"2013-12-13T07:49:00","guid":{"rendered":"https:\/\/kids.esa.int\/thinning_ice_and_rising_sea_levels\/"},"modified":"2026-10-08T00:29:35","modified_gmt":"2026-10-07T22:29:35","slug":"thinning_ice_and_rising_sea_levels","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/thinning_ice_and_rising_sea_levels\/","title":{"rendered":"Tunnare is och stigande havsniv\u00e5er"},"content":{"rendered":"
\n

Sedan uppskjutningen i april 2010 har ESA:s rymdfarkost CryoSat kretsat \u00f6ver v\u00e5r planets nord- och sydpoler. Dess uppdrag \u00e4r att observera f\u00f6r\u00e4ndringar i tjockleken p\u00e5 isen som t\u00e4cker dessa omr\u00e5den.<\/p>\n

Efter tre \u00e5rs observationer har CryoSat bekr\u00e4ftat att isvolymen i Arktis (Nordpolen) minskar. CryoSat har ocks\u00e5 visat att den v\u00e4stantarktiska ist\u00e4cken (Sydpolen) f\u00f6rlorar mer \u00e4n 150 kubikkilometer is varje \u00e5r. Det motsvarar en isplatta som \u00e4r 1 km bred, 1 km djup och 150 km l\u00e5ng!<\/p>\n<\/div>\n

De enorma ist\u00e4cken som t\u00e4cker jordens polaromr\u00e5den \u00e4r inte best\u00e4ndiga. De v\u00e4xer under kallare perioder, s\u00e5 kallade istider, och krymper n\u00e4r temperaturen stiger eller de lokala f\u00f6rh\u00e5llandena f\u00f6r\u00e4ndras. Till och med den antarktiska ist\u00e4cken, som \u00e4r n\u00e4stan 3 km tjock, kan p\u00e5verkas.<\/p>\n

\"Change
F\u00f6r\u00e4ndring av ist\u00e4ckets tjocklek per \u00e5r<\/figcaption><\/figure>\n

V\u00e4stantarktis upplever f\u00f6r n\u00e4rvarande en snabb isf\u00f6rlust. CryoSat har visat att det mesta av denna f\u00f6rlust sker i de glaci\u00e4rer som rinner ut i Amundsenhavet. Isens uttunning \u00f6kar kraftigt till 4\u20138 meter per \u00e5r d\u00e4r Pine Island-, Thwaites- och Smith-glaci\u00e4rerna l\u00e4mnar land och b\u00f6rjar flyta ut \u00f6ver havet.<\/p>\n

Man trodde tidigare att sm\u00e4ltningen i V\u00e4stantarktis hade orsakat en global havsniv\u00e5h\u00f6jning p\u00e5 0,28 mm per \u00e5r mellan 2005 och 2010. Nya resultat fr\u00e5n CryoSat tyder dock p\u00e5 att regionens bidrag till havsniv\u00e5h\u00f6jningen \u00e4r \u00e4nnu st\u00f6rre! Detta kan antingen bero p\u00e5 att isen blir tunnare snabbare \u00e4n vad forskarna tidigare trodde, eller p\u00e5 att CryoSat ger en mer exakt bild \u00e4n andra satelliter!<\/p>","protected":false},"excerpt":{"rendered":"

Since its launch in April 2010, ESA\u2019s CryoSat spacecraft has been flying over the North and South Poles of our planet. Its mission is to observe changes in the thickness […]<\/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\/2010\/01\/esa_s_ice_mission2\/17894573-2-eng-GB\/ESA_s_ice_mission.jpg","esa_banner_description":"ESA's ice mission","esa_banner_credit":"ESA\/AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/01\/ESA_s_ice_mission2","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":[64,42,10],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-555","post","type-post","status-publish","format-standard","hentry","category-climate-change","category-earth","category-learn"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/555","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=555"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/555\/revisions"}],"predecessor-version":[{"id":4547,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/555\/revisions\/4547"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=555"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=555"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=555"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=555"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=555"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=555"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=555"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}