{"id":373,"date":"2018-08-13T11:39:00","date_gmt":"2018-08-13T09:39:00","guid":{"rendered":"https:\/\/kids.esa.int\/earth_is_surprisingly_squishy\/"},"modified":"2026-10-08T00:27:25","modified_gmt":"2026-10-07T22:27:25","slug":"earth_is_surprisingly_squishy","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/hu\/earth_is_surprisingly_squishy\/","title":{"rendered":"A F\u00f6ld meglep\u0151en puha!"},"content":{"rendered":"
\n

20 000 \u00e9vvel ezel\u0151tt a F\u00f6ld j\u00e9gkorszakban volt! Bolyg\u00f3nk nagy r\u00e9sz\u00e9t j\u00e9g bor\u00edtotta, sok helyen 3 km vastags\u00e1gban, ak\u00e1rcsak manaps\u00e1g az Antarktisz \u00e9s Gr\u00f6nland egyes r\u00e9szein. A tud\u00f3sok azt vizsg\u00e1lt\u00e1k, hogyan v\u00e1ltozik a F\u00f6ld felsz\u00edne, amikor vastag j\u00e9g bor\u00edtja, \u00e9s mi t\u00f6rt\u00e9nik, amikor az a j\u00e9g elolvad. V\u00e1rakoz\u00e1son fel\u00fcli felfedez\u00e9st tettek!<\/p>\n<\/div>\n

A F\u00f6ld kem\u00e9ny, szikl\u00e1s k\u00e9reg \u2013 amely mag\u00e1ban foglalja azt a talajt is, amelyen j\u00e1runk \u2013 egy 2900 km vastag, k\u00f6penynek nevezett r\u00e9teg tetej\u00e9n helyezkedik el. Ez a r\u00e9teg meglehet\u0151sen puha, \u00e9s \u00fagy viselkedik, mint egy s\u0171r\u0171 folyad\u00e9k. Amikor a f\u00f6l\u00f6tte l\u00e9v\u0151 k\u00e9reg nehezebb, mint p\u00e9ld\u00e1ul a m\u00faltban, amikor j\u00e9g bor\u00edtotta, a k\u00f6peny \u00f6sszenyom\u00f3dik. Az utols\u00f3 j\u00e9gkorszak sor\u00e1n a legvastagabb j\u00e9gr\u00e9teg alatt fekv\u0151 sz\u00e1razf\u00f6ld ak\u00e1r 500 m\u00e9terrel is s\u00fcllyedt!<\/p>\n

V\u00e9g\u00fcl a j\u00e9g nagy r\u00e9sze elolvadt, \u00e9s mivel m\u00e1r nem nehezedett r\u00e1 az a hatalmas s\u00faly, a k\u00f6peny ism\u00e9t felemelkedett. Ma is folyamatosan emelkedik, b\u00e1r lassabb \u00fctemben. A F\u00f6ld teh\u00e1t kicsit olyan, mint az \u00e1gyad matracja \u2013 amikor r\u00e1fekszel, a matrac \u00f6sszenyom\u00f3dik. De amikor leugrasz r\u00f3la, lassan visszany\u00falik a hely\u00e9re!<\/p>\n

Nyugat-Antarktisz szintje emelkedik. Szerz\u0151i jog: Planetary Visions (forr\u00e1s: ESA\/Planetary Visions)<\/i>.<\/p>\n

Egy tud\u00f3scsoport GPS-adatokat (Global Positioning Satellite) haszn\u00e1lt az Antarktisz magass\u00e1g\u00e1nak m\u00e9r\u00e9s\u00e9re. Mivel a kontinens m\u00e9g mindig vastag j\u00e9gtakar\u00f3val bor\u00edtott \u2013 b\u00e1r nem annyira, mint a j\u00e9gkorszak idej\u00e9n \u2013, azt v\u00e1rn\u00e1nk, hogy a sz\u00e1razf\u00f6ld csak lassan emelkedik. Meglepet\u00e9s\u00fckre azonban kider\u00fclt, hogy egy r\u00e9sze val\u00f3j\u00e1ban gyorsabban emelkedik, mint a F\u00f6ld szinte b\u00e1rmely m\u00e1s pontja! Ez az\u00e9rt \u00e9rdekes, mert \u00faj betekint\u00e9st ny\u00fajt abba, hogy milyen lehet az alatta l\u00e9v\u0151 k\u00f6peny.<\/p>\n

\"GOCE
A GOCE p\u00e1ly\u00e1n<\/figcaption><\/figure>\n

A tanulm\u00e1ny elk\u00e9sz\u00edt\u00e9s\u00e9hez a tud\u00f3sok az ESA \u201eGravity field and steady-state Ocean Circulation Explorer\u201d (r\u00f6viden GOCE) nev\u0171 \u0171rkutat\u00e1si misszi\u00f3j\u00e1b\u00f3l sz\u00e1rmaz\u00f3 adatokat haszn\u00e1lt\u00e1k fel. A GOCE felt\u00e9rk\u00e9pezte a F\u00f6ld k\u00f6r\u00fcli gravit\u00e1ci\u00f3s mez\u0151t, ami egy okos m\u00f3dszer arra, hogy kider\u00edts\u00fck, mi zajlik a felsz\u00edn alatt. Ha a f\u00f6ld alatt sok s\u0171r\u0171 anyag tal\u00e1lhat\u00f3, akkor a gravit\u00e1ci\u00f3s mez\u0151 kiss\u00e9 er\u0151sebb. \u00cdgy a GOCE adatai alapj\u00e1n meg tudjuk \u00e1llap\u00edtani, milyen szil\u00e1rd a k\u00f6peny.<\/p>\n

A GOCE-misszi\u00f3 2013-ban \u00e9rt v\u00e9get, de az adatok nyilv\u00e1nval\u00f3an m\u00e9g mindig rendk\u00edv\u00fcl \u00e9rt\u00e9kesek! Kider\u00fclt bel\u0151l\u00fck, hogy a k\u00f6peny val\u00f3j\u00e1ban l\u00e1gyabb, mint gondoltuk, nagyon foly\u00e9kony, \u00e9s gyorsan mozog \u2013 ami megmagyar\u00e1zza, mi\u00e9rt figyeltek meg ilyen gyors emelked\u00e9seket az Antarktiszon.<\/p>\n

Ez a kutat\u00e1s remek m\u00f3dja annak, hogy megismerj\u00fck bolyg\u00f3nk, a F\u00f6ld belsej\u00e9t!<\/p>\n

\u00c9rdekes t\u00e9ny:<\/b> A GOCE-t \u00fagy tervezt\u00e9k, hogy ne tartalmazzon olyan mozg\u00f3 alkatr\u00e9szeket, amelyek m\u00e1s \u0171reszk\u00f6z\u00f6kben megtal\u00e1lhat\u00f3k, mivel a mozg\u00e1s zavarhatn\u00e1 a gravit\u00e1ci\u00f3s m\u00e9r\u00e9seit!<\/p>","protected":false},"excerpt":{"rendered":"

20,000 years ago, Earth was in an Ice Age! Most of our planet was covered in ice, in many places 3km thick, like parts of Antarctica and Greenland today. Scientists […]<\/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\/2018\/08\/antarctica_in_3d\/17869709-2-eng-GB\/Antarctica_in_3D.jpg","esa_banner_description":"Antarctica in 3D","esa_banner_credit":"CPOM","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2018\/08\/Antarctica_in_3D","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":[42,10,43],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-373","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-protecting-earth"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/comments?post=373"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/373\/revisions"}],"predecessor-version":[{"id":4421,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/posts\/373\/revisions\/4421"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/media?parent=373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/categories?post=373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/tags?post=373"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/panel?post=373"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/language?post=373"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/age?post=373"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/duration?post=373"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/resource_type?post=373"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/audience?post=373"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/hu\/wp-json\/wp\/v2\/wf_post_folders?post=373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}