{"id":1017,"date":"2010-02-18T14:27:00","date_gmt":"2010-02-18T13:27:00","guid":{"rendered":"https:\/\/kids.esa.int\/cryosat_esa_s_eye_on_earth_s_ice\/"},"modified":"2026-10-08T00:34:55","modified_gmt":"2026-10-07T22:34:55","slug":"cryosat_esa_s_eye_on_earth_s_ice","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/da\/cryosat_esa_s_eye_on_earth_s_ice\/","title":{"rendered":"CryoSat \u2013 ESA\u2019s \u00f8je p\u00e5 Jordens is"},"content":{"rendered":"<div class=\"lede\">\n<p>ESA er ved at opsende den mest avancerede satellit nogensinde til m\u00e5ling af Jordens isd\u00e6kke. CryoSat-missionen er genopst\u00e5et fra de d\u00f8de, efter at den f\u00f8rste satellit gik tabt som f\u00f8lge af en fejl i l\u00f8fteraketten i oktober 2005. Nu er den nye, forbedrede CryoSat-2 klar til opsendelse den 8. april. Den vil blive bragt i en pol\u00e6r bane, 700 km over Jorden, af en russisk Dnepr-raket, der skal opsendes fra Baikonur-kosmodromen i Kasakhstan.<\/p>\n<\/div>\n<p>Isd\u00e6kket er i mange \u00e5r blevet kortlagt fra rummet ved hj\u00e6lp af satellitter som Envisat. De seneste rekordlave tal for det areal, der er d\u00e6kket af arktisk havis om sommeren, tyder p\u00e5, at der sker betydelige forandringer p\u00e5 toppen af verden. Men dette giver ikke det fulde billede af, hvordan klimaforandringerne kan p\u00e5virke polaromr\u00e5derne. Forskerne er ogs\u00e5 meget interesserede i at finde ud af, hvordan isens tykkelse \u00e6ndrer sig. Iskapperne p\u00e5 land er mange kilometer tykke. Hvis de begynder at forsvinde, kan det medf\u00f8re store stigninger i havniveauet med oversv\u00f8mmelser af kystomr\u00e5der, herunder store byer.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"4647\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2010\/01\/Canadian_Arctic_and_Greenland_as_seen_by_Envisat2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2010\/01\/canadian_arctic_and_greenland_as_seen_by_envisat2\/17912740-2-eng-GB\/Canadian_Arctic_and_Greenland_as_seen_by_Envisat.jpg\" alt=\"Canadian Arctic and Greenland as seen by Envisat\"><\/figure>\n<p>CryoSat er den ideelle isobservat\u00f8r. Den er udstyret med et mikrob\u00f8lgeradarinstrument, der fungerer under alle vejrforhold og opfanger ekkoerne fra korte radarimpulser, der reflekteres fra isoverfladen. Instrumentet kan med stor n\u00f8jagtighed m\u00e5le eventuelle variationer i tykkelsen af isen, der flyder p\u00e5 polarhavene. Det vil ogs\u00e5 holde n\u00f8je \u00f8je med de enorme iskapper, der d\u00e6kker Gr\u00f8nland og Antarktis. I l\u00f8bet af de n\u00e6ste tre til fem \u00e5r vil satellitten registrere \u00e6ndringer p\u00e5 ned til \u00e9n centimeter om \u00e5ret.<\/p>","protected":false},"excerpt":{"rendered":"<p>ESA is about to launch the most advanced satellite ever to measure Earth\u2019s ice cover. The CryoSat mission has come back from the dead after the first satellite was lost [&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\/2009\/09\/cryosat2\/17868562-2-eng-GB\/CryoSat.jpg","esa_banner_description":"CryoSat","esa_banner_credit":"ESA\/P. 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