{"id":1000,"date":"2010-02-18T14:04:00","date_gmt":"2010-02-18T13:04:00","guid":{"rendered":"https:\/\/kids.esa.int\/the_threat_of_melting_ice\/"},"modified":"2026-10-08T00:34:42","modified_gmt":"2026-10-07T22:34:42","slug":"the_threat_of_melting_ice","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/the_threat_of_melting_ice\/","title":{"rendered":"Hrozba t\u00e1n\u00ed ledu"},"content":{"rendered":"
\n

P\u0159ibli\u017en\u011b p\u0159ed 20 000 lety byla velk\u00e1 \u010d\u00e1st Evropy, Asie, Severn\u00ed a Ji\u017en\u00ed Ameriky pokryta obrovsk\u00fdmi ledov\u00fdmi \u0161t\u00edty, z nich\u017e ka\u017ed\u00fd m\u011bl tlou\u0161\u0165ku mnoho kilometr\u016f. Od t\u00e9 doby se led postupn\u011b rozt\u00e1val a ledov\u00e9 \u0161t\u00edty ustupovaly. Dnes se jedin\u00e9 ledov\u00e9 p\u0159\u00edkrovy na pevninsk\u00fdch mas\u00e1ch Zem\u011b nach\u00e1zej\u00ed v Antarktid\u011b a Gr\u00f3nsku. \u010c\u00e1st ledu se vyskytuje tak\u00e9 ve form\u011b ledovc\u016f v horsk\u00fdch oblastech a jako plovouc\u00ed ledov\u00e9 kry v Severn\u00edm ledov\u00e9m oce\u00e1nu a kolem Antarktidy.<\/p>\n<\/div>\n

Na prvn\u00ed pohled se tyto vzd\u00e1len\u00e9 poz\u016fstatky posledn\u00ed doby ledov\u00e9 zdaj\u00ed pro v\u011bt\u0161inu z n\u00e1s dnes m\u00e1lo v\u00fdznamn\u00e9. Nic v\u0161ak nem\u016f\u017ee b\u00fdt d\u00e1le od pravdy. Mnoho v\u011bdc\u016f se domn\u00edv\u00e1, \u017ee se na\u0161e planeta otepluje v d\u016fsledku sklen\u00edkov\u00fdch plyn\u016f, kter\u00e9 vypou\u0161t\u00edme do atmosf\u00e9ry. Pokud se planeta otepl\u00ed, ledov\u00e9 \u0161t\u00edty za\u010dnou t\u00e1t, co\u017e zp\u016fsob\u00ed zv\u00fd\u0161en\u00ed hladiny mo\u0159e mo\u017en\u00e1 a\u017e o n\u011bkolik metr\u016f do konce tohoto stolet\u00ed. Takov\u00fd n\u00e1r\u016fst by zp\u016fsobil rozs\u00e1hl\u00e9 z\u00e1plavy v n\u00edzko polo\u017een\u00fdch pob\u0159e\u017en\u00edch oblastech a ohrozil by mnoho velk\u00fdch m\u011bst.<\/p>\n

Pozorov\u00e1n\u00ed z vesm\u00edru nazna\u010duj\u00ed, \u017ee n\u011bkter\u00e9 \u010d\u00e1sti velk\u00fdch ledov\u00fdch \u0161t\u00edt\u016f za\u010d\u00ednaj\u00ed t\u00e1t rychleji. Ned\u00e1vn\u00e9 satelitn\u00ed sn\u00edmky z\u00e1rove\u0148 uk\u00e1zaly, \u017ee b\u011bhem arktick\u00e9ho l\u00e9ta taj\u00ed neobvykle rozs\u00e1hl\u00e9 plochy mo\u0159sk\u00e9ho ledu. A\u010dkoli t\u00e1n\u00ed plovouc\u00edho ledu nebude m\u00edt vliv na hladinu mo\u0159e, dojde k dal\u0161\u00edm v\u00fdznamn\u00fdm zm\u011bn\u00e1m \u017eivotn\u00edho prost\u0159ed\u00ed. Ledov\u00e9 \u0161t\u00edty nap\u0159\u00edklad funguj\u00ed jako zrcadlo, odr\u00e1\u017eej\u00ed slune\u010dn\u00ed z\u00e1\u0159en\u00ed a ochlazuj\u00ed Zemi. Pokud led zmiz\u00ed, Zem\u011b se pravd\u011bpodobn\u011b otepl\u00ed a mohlo by doj\u00edt k v\u00fdznamn\u00fdm klimatick\u00fdm zm\u011bn\u00e1m. Zni\u010den\u00e1 by mohla b\u00fdt tak\u00e9 divok\u00e1 zv\u011b\u0159 \u017eij\u00edc\u00ed v pol\u00e1rn\u00edch oblastech.<\/p>","protected":false},"excerpt":{"rendered":"

About 20,000 years ago, much of Europe, Asia, North and South America was covered by huge sheets of ice, each many kilometres thick. Since then, the ice has gradually melted […]<\/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\/10\/iceberg2\/17899718-2-eng-GB\/Iceberg.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2009\/10\/Iceberg2","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":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1000","post","type-post","status-publish","format-standard","hentry","category-climate-change","category-earth","category-learn","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1000","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/comments?post=1000"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1000\/revisions"}],"predecessor-version":[{"id":2143,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/1000\/revisions\/2143"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=1000"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=1000"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=1000"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=1000"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=1000"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=1000"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=1000"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=1000"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=1000"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=1000"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}