{"id":459,"date":"2016-08-01T11:19:00","date_gmt":"2016-08-01T09:19:00","guid":{"rendered":"https:\/\/kids.esa.int\/greenland_s_melting_ice_revealed_by_esa_satellite\/"},"modified":"2026-10-08T00:28:27","modified_gmt":"2026-10-07T22:28:27","slug":"greenland_s_melting_ice_revealed_by_esa_satellite","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/greenland_s_melting_ice_revealed_by_esa_satellite\/","title":{"rendered":"ESA:n satelliitti paljasti Gr\u00f6nlannin sulavan j\u00e4\u00e4n"},"content":{"rendered":"<div class=\"lede\">\n<p>ESA:n CryoSat-niminen satelliitti on mitannut Gr\u00f6nlannin j\u00e4\u00e4m\u00e4\u00e4r\u00e4\u00e4. Se on havainnut, ett\u00e4 suuri m\u00e4\u00e4r\u00e4 j\u00e4\u00e4t\u00e4 on sulanut. Kiinte\u00e4 j\u00e4\u00e4 muuttuu nestem\u00e4iseksi vedeksi ja virtaa sitten maapallon meriin, mik\u00e4 nostaa merenpintaa. T\u00e4m\u00e4 huolestuttaa monia ihmisi\u00e4, sill\u00e4 merenpinnan nousu aiheuttaa lukuisia ongelmia, kuten rannikkokaupunkien tulvia ymp\u00e4ri maailmaa.<\/p>\n<\/div>\n<p>Tutkijat uskovat, ett\u00e4 Gr\u00f6nlannin j\u00e4\u00e4 sulaa maailmanlaajuisen ilmastonmuutoksen vuoksi. Maapallo l\u00e4mpenee, ja l\u00e4mp\u00f6 sulattaa j\u00e4\u00e4n. Maailmanlaajuisen ilmastonmuutoksen syyt ovat monimutkaisia, mutta sen uskotaan johtuvan osittain autojen ja tehtaiden p\u00e4\u00e4st\u00f6ist\u00e4.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"Planetary Visions\/CPOM\/UCL\/ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2016\/07\/CryoSat_has_been_measuring_the_thickness_of_ice\" 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\/2016\/07\/cryosat_has_been_measuring_the_thickness_of_ice\/17888542-2-eng-GB\/CryoSat_has_been_measuring_the_thickness_of_ice.jpg\" alt=\"CryoSat has been measuring the thickness of ice\"><\/figure>\n<p>CryoSat mittaa Gr\u00f6nlannin valtavien j\u00e4\u00e4tik\u00f6iden korkeutta eritt\u00e4in tarkasti. Se tekee t\u00e4m\u00e4n k\u00e4ytt\u00e4m\u00e4ll\u00e4 huipputeknologista laitetta, jota kutsutaan tutka-korkeusmittariksi. Kun CryoSat on Gr\u00f6nlannin yl\u00e4puolella, tutka-korkeusmittari l\u00e4hett\u00e4\u00e4 energiapulsseja suoraan alapuolella olevaan j\u00e4\u00e4h\u00e4n. T\u00e4m\u00e4 energia heijastuu j\u00e4\u00e4st\u00e4 ja matkustaa sitten takaisin tutka-korkeusmittariin. Mittaamalla, kuinka kauan energian paluu kest\u00e4\u00e4, voidaan laskea j\u00e4\u00e4n korkeus. CryoSat-satelliitti pystyy mittaamaan j\u00e4\u00e4peitteiden reunoja, joissa suurin osa muutoksista todellisuudessa tapahtuu!<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1920\" data-credit=\"Library image\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2016\/07\/Ice_is_important_for_life_on_Earth_and_maintaining_a_healthy_climate\" 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\/2016\/07\/ice_is_important_for_life_on_earth_and_maintaining_a_healthy_climate\/17885693-2-eng-GB\/Ice_is_important_for_life_on_Earth_and_maintaining_a_healthy_climate.jpg\" alt=\"Ice is important for life on Earth and maintaining a healthy climate\"><\/figure>\n<p>CryoSat on hyv\u00e4 esimerkki siit\u00e4, miten maata kiert\u00e4v\u00e4t satelliitit auttavat planeettamme seurannassa. Jos emme tied\u00e4, ett\u00e4 ongelma on olemassa, emme voi tehd\u00e4 mit\u00e4\u00e4n sen ratkaisemiseksi! CryoSatin ansiosta ymm\u00e4rr\u00e4mme nyt hyvin, miten Gr\u00f6nlannin sulava j\u00e4\u00e4 nostaa merenpintaa, joten voimme varautua paremmin ongelman ratkaisemiseen.<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> CryoSat kiert\u00e4\u00e4 maapallon ymp\u00e4ri noin 717 km:n korkeudella \u2013 l\u00e4hes kaksi kertaa niin korkealla kuin kansainv\u00e4linen avaruusasema!<\/p>","protected":false},"excerpt":{"rendered":"<p>An ESA satellite called CryoSat has been measuring the amount of ice in Greenland. It has discovered that a lot of ice has been melting. The solid ice is turning [&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\/2016\/07\/cryosat_is_in_orbit_around_earth\/17911898-2-eng-GB\/CryoSat_is_in_orbit_around_Earth.jpg","esa_banner_description":"CryoSat is in orbit around Earth","esa_banner_credit":"ESA\/AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2016\/07\/CryoSat_is_in_orbit_around_Earth","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-459","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\/fi\/wp-json\/wp\/v2\/posts\/459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=459"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/459\/revisions"}],"predecessor-version":[{"id":4493,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/459\/revisions\/4493"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=459"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=459"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=459"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=459"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=459"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=459"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=459"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}