{"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\/da\/thinning_ice_and_rising_sea_levels\/","title":{"rendered":"Tyndere is og stigende havniveauer"},"content":{"rendered":"
\n

Siden opsendelsen i april 2010 har ESA\u2019s CryoSat-rumfart\u00f8j fl\u00f8jet over vores planets nord- og sydpol. Dets mission er at observere \u00e6ndringer i tykkelsen af den is, der d\u00e6kker disse omr\u00e5der.<\/p>\n

Efter tre \u00e5rs observationer har CryoSat bekr\u00e6ftet, at ism\u00e6ngden i Arktis (Nordpolen) er faldende. CryoSat har ogs\u00e5 vist, at den vestantarktiske iskappe (Sydpolen) mister mere end 150 kubikkilometer is hvert \u00e5r. Det svarer til en isblok, der er 1 km bred, 1 km dyb og 150 km lang!<\/p>\n<\/div>\n

De enorme isd\u00e6kker, der d\u00e6kker Jordens polaromr\u00e5der, er ikke permanente. De vokser i koldere perioder, ogs\u00e5 kaldet istider, og de krymper, n\u00e5r temperaturerne stiger, eller de lokale forhold \u00e6ndrer sig. Selv den antarktiske iskappe, der er n\u00e6sten 3 km tyk, kan blive p\u00e5virket.<\/p>\n

\"Change
\u00c6ndring i iskappe-tykkelsen pr. \u00e5r<\/figcaption><\/figure>\n

Vestanantarktis oplever i \u00f8jeblikket et hurtigt istab. CryoSat har vist, at det meste af dette sker i de gletsjere, der l\u00f8ber ud i Amundsenhavet. Isen bliver op til 4\u20138 m tyndere om \u00e5ret d\u00e9r, hvor Pine Island-, Thwaites- og Smith-gletsjerne forlader fastlandet og begynder at flyde ud over havet.<\/p>\n

Man mente tidligere, at smeltningen i Vestantarktis havde for\u00e5rsaget en global stigning i havniveauet p\u00e5 0,28 mm om \u00e5ret mellem 2005 og 2010. Nye resultater fra CryoSat tyder imidlertid p\u00e5, at regionens bidrag til havniveauets stigning er endnu st\u00f8rre! Dette kan enten skyldes, at isen bliver tyndere hurtigere, end forskerne tidligere havde antaget, eller at CryoSat giver et mere pr\u00e6cist billede end andre satellitter!<\/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\/da\/wp-json\/wp\/v2\/posts\/555","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=555"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/555\/revisions"}],"predecessor-version":[{"id":4547,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/555\/revisions\/4547"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=555"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=555"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=555"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=555"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=555"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=555"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=555"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=555"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=555"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}