{"id":435,"date":"2017-07-17T10:04:00","date_gmt":"2017-07-17T08:04:00","guid":{"rendered":"https:\/\/kids.esa.int\/gigantic_iceberg_now_floating_free\/"},"modified":"2026-10-08T00:28:10","modified_gmt":"2026-10-07T22:28:10","slug":"gigantic_iceberg_now_floating_free","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/cs\/gigantic_iceberg_now_floating_free\/","title":{"rendered":"Obrovsk\u00fd ledovec se nyn\u00ed voln\u011b vzn\u00e1\u0161\u00ed"},"content":{"rendered":"<div class=\"lede\">\n<p>V posledn\u00edch n\u011bkolika m\u011bs\u00edc\u00edch se p\u0159es obrovsk\u00fd kus ledu v Antarktid\u011b t\u00e1hla velk\u00e1 trhlina. Satelity Sentinel-1 agentury ESA nyn\u00ed zaznamenaly, \u017ee se led zcela odlomil a vytvo\u0159il tak jeden z nejv\u011bt\u0161\u00edch ledovc\u016f, jak\u00e9 kdy byly zaznamen\u00e1ny.<\/p>\n<\/div>\n<figure class=\"wp-block-image size-large\" data-width=\"849\" data-credit=\"contains modified Copernicus Sentinel data (2017), processed by ESA, CC BY-SA 3.0 IGO\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/07\/Ice_crack_seen_by_Sentinel-2A\" data-licence=\"CC BY-SA 3.0 IGO or 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\/2017\/07\/ice_crack_seen_by_sentinel-2a\/17906200-2-eng-GB\/Ice_crack_seen_by_Sentinel-2A.jpg\" alt=\"Ice crack seen by Sentinel-2A\"><figcaption>Ledov\u00e1 trhlina zachycen\u00e1 satelitem Sentinel-2A<\/figcaption><\/figure>\n<p>Trhlina se ve skute\u010dnosti objevila ji\u017e p\u0159ed n\u011bkolika lety, ale zpo\u010d\u00e1tku se p\u0159\u00edli\u0161 neroz\u0161i\u0159ovala. Situace se zm\u011bnila na za\u010d\u00e1tku roku 2016, kdy se za\u010dala prodlu\u017eovat. Jen v lednu 2017 se prodlou\u017eila o 20 km a dos\u00e1hla celkov\u00e9 d\u00e9lky 175 km. Na za\u010d\u00e1tku \u010dervence 2017 zb\u00fdvalo mezi koncem trhliny a oce\u00e1nem u\u017e jen n\u011bkolik kilometr\u016f. Od t\u00e9 doby v\u011bdci \u010dekaj\u00ed, a\u017e se trhlina dostane k oce\u00e1nu a odd\u011bl\u00ed tak od Antarktidy obrovsk\u00fd ledovec.<\/p>\n<p>Antarktida bohu\u017eel sm\u011b\u0159uje do temn\u00fdch zimn\u00edch m\u011bs\u00edc\u016f, kdy je slune\u010dn\u00edho sv\u011btla m\u00e1lo a \u010dasto panuje \u0161patn\u00e9 po\u010das\u00ed, co\u017e zt\u011b\u017euje pozorov\u00e1n\u00ed i pomoc\u00ed satelit\u016f. Aby tento probl\u00e9m p\u0159ekonali, vyu\u017eili v\u011bdci z projektu MIDAS \u2013 antarktick\u00e9 v\u00fdzkumn\u00e9 skupiny veden\u00e9 Swansea University ve Velk\u00e9 Brit\u00e1nii \u2013 radarov\u00e9 sn\u00edmkovac\u00ed za\u0159\u00edzen\u00ed satelit\u016f Sentinel, aby pronikli temnotou a mraky.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1500\" data-credit=\"P. Nyquist\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/07\/Trekking_out_for_CryoSat\" 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\/2017\/07\/trekking_out_for_cryosat\/17900569-2-eng-GB\/Trekking_out_for_CryoSat.jpg\" alt=\"Trekking out for CryoSat\"><figcaption>V\u00fdprava za CryoSat<\/figcaption><\/figure>\n<p>V\u011bdci nav\u00edc k sledov\u00e1n\u00ed v\u00fdvoje situace vyu\u017eili dal\u0161\u00ed satelit ESA s n\u00e1zvem CryoSat. CryoSat je vybaven za\u0159\u00edzen\u00edm zvan\u00fdm radarov\u00fd v\u00fd\u0161kom\u011br, kter\u00e9 dok\u00e1\u017ee m\u011b\u0159it v\u00fd\u0161ku a tlou\u0161\u0165ku ledu. D\u00edky tomu jsme zjistili, \u017ee trhlina byla hlubok\u00e1 des\u00edtky metr\u016f a nejednalo se pouze o m\u011blkou trhlinu na povrchu.<\/p>\n<p>Tento nov\u00fd obrovsk\u00fd ledovec m\u00e1 rozlohu p\u0159ibli\u017en\u011b 6 000 km\u00b2 a v\u00e1\u017e\u00ed v\u00edce ne\u017e milion milion\u016f tun! Je t\u011b\u017ek\u00e9 p\u0159edpov\u011bd\u011bt, co se s n\u00edm stane d\u00e1l. M\u016f\u017ee v t\u00e9to oblasti plout je\u0161t\u011b mnoho let. Nebo se m\u016f\u017ee rozpadnout na men\u0161\u00ed ledovce, kter\u00e9 by mohly un\u00e1\u0161et proudem na sever do teplej\u0161\u00edch vod, kde by led rozt\u00e1l.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1500\" data-credit=\"ESA\u2013Pierre\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/07\/Artist_s_impression_of_Sentinel-1B\" 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\/2017\/07\/artist_s_impression_of_sentinel-1b\/17899311-2-eng-GB\/Artist_s_impression_of_Sentinel-1B.jpg\" alt=\"Artist\u2019s impression of Sentinel-1B\"><figcaption>Um\u011bleck\u00e1 vizualizace sondy Sentinel-1B<\/figcaption><\/figure>\n<p>Ztr\u00e1ta tak velk\u00e9ho kusu ledu v Antarktid\u011b by mohla zp\u016fsobit probl\u00e9my. Kdy\u017e k podobn\u00fdm ud\u00e1lostem do\u0161lo v minulosti, urychlilo to tok ledovc\u016f do oce\u00e1n\u016f, co\u017e p\u0159isp\u011blo ke zv\u00fd\u0161en\u00ed hladiny mo\u0159\u00ed na Zemi.<\/p>\n<p>Dobrou zpr\u00e1vou je, \u017ee d\u00edky satelit\u016fm ESA m\u016f\u017eeme pr\u016fb\u011b\u017en\u011b sledovat, jak se na\u0161e planeta m\u011bn\u00ed, zejm\u00e9na na m\u00edstech, kam se dostaneme jen velmi obt\u00ed\u017en\u011b, jako je Antarktida. \u010c\u00edm v\u00edce informac\u00ed m\u00e1me, t\u00edm l\u00e9pe m\u016f\u017eeme chr\u00e1nit na\u0161i planetu a \u017eivot na n\u00ed!<\/p>\n<p><b>Zaj\u00edmavost:<\/b> Ledovec obsahuje p\u0159ibli\u017en\u011b stejn\u00e9 mno\u017estv\u00ed vody jako jezero Ontario v Severn\u00ed Americe!<\/p>","protected":false},"excerpt":{"rendered":"<p>For the last few months a large crack has been cutting across a vast chunk of ice in Antarctica. ESA\u2019s Sentinel-1 satellites have now seen the ice completely break away, [&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\/2017\/07\/larsen_c_breaks2\/17881808-2-eng-GB\/Larsen_C_breaks.jpg","esa_banner_description":"Larsen C breaks","esa_banner_credit":"contains modified Copernicus Sentinel data (2017), processed by ESA, CC BY-SA 3.0 IGO","esa_banner_licence":"CC BY-SA 3.0 IGO or ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2017\/07\/Larsen_C_breaks2","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":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-435","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/435","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=435"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/435\/revisions"}],"predecessor-version":[{"id":4471,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/posts\/435\/revisions\/4471"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/media?parent=435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/categories?post=435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/tags?post=435"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/panel?post=435"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/language?post=435"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/age?post=435"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/duration?post=435"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/resource_type?post=435"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/audience?post=435"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/cs\/wp-json\/wp\/v2\/wf_post_folders?post=435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}