{"id":1024,"date":"2006-05-02T08:28:00","date_gmt":"2006-05-02T06:28:00","guid":{"rendered":"https:\/\/kids.esa.int\/space_radar_reveals_antarctic_rivers\/"},"modified":"2026-10-08T00:35:00","modified_gmt":"2026-10-07T22:35:00","slug":"space_radar_reveals_antarctic_rivers","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/ro\/space_radar_reveals_antarctic_rivers\/","title":{"rendered":"Un radar spa\u021bial dezv\u0103luie existen\u021ba r\u00e2urilor din Antarctica"},"content":{"rendered":"
\n

Oamenii de \u0219tiin\u021b\u0103 \u0219tiu de zeci de ani c\u0103 sub \u00eentinderile \u00eenghe\u021bate ale Antarcticii se ascund numeroase lacuri uria\u0219e. Cu toate acestea, s-a presupus de obicei c\u0103 aceste lacuri erau izolate. Acum, un satelit radar european cunoscut sub numele de ERS-2 a demonstrat c\u0103 r\u00e2urile de sub ghea\u021b\u0103 pot transporta volume uria\u0219e de ap\u0103 de inunda\u021bie de la un lac la altul.<\/p>\n<\/div>\n

Descoperirea a fost f\u0103cut\u0103 de oameni de \u0219tiin\u021b\u0103 britanici, care analizau schimb\u0103rile \u00een altitudinea suprafe\u021bei calotei glaciare. M\u0103sur\u0103torile ultraprecise efectuate cu ajutorul radarului asupra altitudinii suprafe\u021bei au ar\u0103tat c\u0103 ghea\u021ba de deasupra unui lac se scufundase cu aproximativ trei metri. La o distan\u021b\u0103 de dou\u0103 sute nou\u0103zeci de kilometri, deasupra a dou\u0103 lacuri subglaciare diferite, ghea\u021ba se umflase \u00een sus.<\/p>\n

Aceste varia\u021bii ale nivelului ghe\u021bii pot fi explicate dac\u0103 un r\u00e2u de dimensiunile Tamisei din Londra ar curge sub calota de ghea\u021b\u0103 cu o grosime de 4 km. Pe parcursul a 16 luni, aproximativ 1,8 kilometri cubi de ap\u0103 s-au scurs cu vitez\u0103 printr-un tunel s\u0103pat \u00een ghea\u021ba solid\u0103<\/p>\n

\u201cAceste noi date arat\u0103 c\u0103, din c\u00e2nd \u00een c\u00e2nd, lacurile de sub ghea\u021b\u0103 \u201dsar\u201d ca dopurile de \u0219ampanie, eliber\u00e2nd inunda\u021bii care se propag\u0103 pe distan\u021be foarte mari\u201d, a declarat prof. Duncan Wingham (University College, Londra).<\/p>\n

\u201cUna dintre principalele \u00eengrijor\u0103ri a fost aceea c\u0103, prin forarea p\u00e2n\u0103 la lacuri, s-ar introduce noi microorganisme\u201d, a declarat prof. Wingham. \u201cDatele noastre arat\u0103 c\u0103 orice contaminare nu se va limita la un singur lac, ci se va extinde, \u00een timp, de-a lungul \u00eentregii re\u021bele de r\u00e2uri.\u201d.<\/p>\n

\u201cNe-am imaginat aceste lacuri ca fiind laboratoare biologice izolate. Acum va trebui s\u0103 ne reconsider\u0103m p\u0103rerea.\u201d<\/p>","protected":false},"excerpt":{"rendered":"

Scientists have known for decades about many huge lakes that hide beneath the frozen wastes of Antarctica. However, it has usually been assumed that the lakes were isolated. Now a […]<\/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\/2006\/04\/the_dry_valleys_in_coastal_east_antarctica2\/17910935-2-eng-GB\/The_Dry_Valleys_in_coastal_East_Antarctica.jpg","esa_banner_description":"The Dry Valleys in coastal East Antarctica","esa_banner_credit":"David Sugden, Edinburgh University","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2006\/04\/The_Dry_Valleys_in_coastal_East_Antarctica2","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":[42,10,66],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-1024","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-water-world"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/1024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/comments?post=1024"}],"version-history":[{"count":1,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/1024\/revisions"}],"predecessor-version":[{"id":2167,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/posts\/1024\/revisions\/2167"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/media?parent=1024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/categories?post=1024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/tags?post=1024"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/panel?post=1024"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/language?post=1024"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/age?post=1024"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/duration?post=1024"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/resource_type?post=1024"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/audience?post=1024"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/ro\/wp-json\/wp\/v2\/wf_post_folders?post=1024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}