{"id":7106,"date":"2026-02-28T17:05:19","date_gmt":"2026-02-28T17:05:19","guid":{"rendered":"https:\/\/www.europesays.com\/sk\/7106\/"},"modified":"2026-02-28T17:05:19","modified_gmt":"2026-02-28T17:05:19","slug":"na-antarktide-mame-gravitacnu-dieru-hovoria-vedci-konecne-vedia-ako-mohla-tato-anomalia-vzniknut-vosveteit-sk","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/sk\/7106\/","title":{"rendered":"Na Antarkt\u00edde m\u00e1me gravita\u010dn\u00fa dieru, hovoria vedci: Kone\u010dne vedia, ako mohla t\u00e1to anom\u00e1lia vznikn\u00fa\u0165 | Vosveteit.sk"},"content":{"rendered":"

Antarkt\u00edda ukr\u00fdva pod \u013eadom jednu z najv\u00e4\u010d\u0161\u00edch gravita\u010dn\u00fdch anom\u00e1li\u00ed na plan\u00e9te. V oblasti Rossovho mora tu hladina oce\u00e1nu klesla pribli\u017ene o 130 metrov pod glob\u00e1lny priemer. Nejde o dieru v klasickom zmysle, ale o miesto, kde gravit\u00e1cia p\u00f4sob\u00ed slab\u0161ie ne\u017e inde.<\/p>\n

Mo\u017eno m\u00e1\u0161 pocit, \u017ee \u201ehladina mora\u201c tvor\u00ed jednu rovinu okolo celej Zeme. Realita vyzer\u00e1 inak. Odborne sa tento skuto\u010dn\u00fd tvar naz\u00fdva geoid. Ide o teoretick\u00fd povrch, ktor\u00fd by vytvoril svetov\u00fd oce\u00e1n, ak by na\u0148 p\u00f4sobila iba gravit\u00e1cia a rot\u00e1cia plan\u00e9ty, bez vetra, pr\u00fadov \u010di pr\u00edlivu. Tento geoid pripom\u00edna zvlnen\u00fa krajinu s kopcami a dolinami, p\u00ed\u0161e Daily Mail.<\/a>\u00a0Antarktick\u00e1 prelia\u010dina patr\u00ed medzi jeho najextr\u00e9mnej\u0161ie body.<\/p>\n

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Odoberaj Vosveteit.sk cez Telegram a prihl\u00e1s sa k odberu spr\u00e1v
\n <\/a><\/p>\n

Vedci t\u00fato oblas\u0165 ozna\u010dili ako Antarctic Geoid Low (AGL). O jej existencii vedeli u\u017e desa\u0165ro\u010dia, no teraz pon\u00fakli detailnej\u0161\u00ed model jej vzniku. Pod\u013ea v\u00fdpo\u010dtov sa proces za\u010dal pribli\u017ene pred 70 mili\u00f3nmi rokov. Pod zamrznut\u00fdm kontinentom sa nahromadili menej hust\u00e9 horniny z pl\u00e1\u0161\u0165a. Ke\u010f\u017ee hustota materi\u00e1lu priamo ovplyv\u0148uje silu gravita\u010dn\u00e9ho \u0165ahu, t\u00e1to zmena postupne oslabila miestne gravita\u010dn\u00e9 pole.<\/p>\n

\"\u013dadovce\"\"\u013dadovce\"Zdroj: Pixabay (lavivm)<\/a>
\nDramatick\u00e9 zosilnenie pri\u0161lo v hlbokej minulosti<\/p>\n

Najv\u00fdraznej\u0161ie zosilnenie anom\u00e1lie nastalo medzi 50 a 30 mili\u00f3nmi rokov dozadu, po\u010das eoc\u00e9nu. V tom istom obdob\u00ed sa za\u010dali dramatick\u00e9 klimatick\u00e9 zmeny a antarktick\u00e9 \u013eadov\u00e9 \u0161t\u00edty sa roz\u0161\u00edrili. Tu sa otv\u00e1ra fascinuj\u00faca ot\u00e1zka, \u010di s\u00favis\u00ed vn\u00fatorn\u00e1 dynamika plan\u00e9ty s v\u00fdvojom kl\u00edmy na povrchu.<\/p>\n

\u201ePredstavi\u0165 si n\u00e1\u0161 proces m\u00f4\u017eeme ako CT vy\u0161etrenie celej Zeme, ale namiesto r\u00f6ntgenu sme pou\u017eili zemetrasenia,\u201c vysvetlil geofyzik Alessandro Forte z Floridskej univerzity.<\/p>\n

Seizmick\u00e9 vlny<\/a> sa \u0161\u00edria rozdielnou r\u00fdchlos\u0165ou pod\u013ea hustoty horn\u00edn. Anal\u00fdza tis\u00edcok otrasov umo\u017enila vedcom vytvori\u0165 trojrozmern\u00fa mapu vn\u00fatorn\u00fdch vrstiev plan\u00e9ty. N\u00e1sledne prepo\u010d\u00edtali, kde gravit\u00e1cia zoslabla a kde zosilnela, a model porovnali so satelitn\u00fdmi meraniami.<\/p>\n

Neprehliadni
\n <\/p>\n

\"Tvoje\"Tvoje <\/p>\n

\n\t\t\t\t\tPopul\u00e1rna spravodajsk\u00e1 aplik\u00e1cia pre iOS a Android dostala ve\u013ek\u00fa aktualiz\u00e1ciu. Pribudlo mno\u017estvo nov\u00fdch funkci\u00ed, ktor\u00e9 mus\u00ed\u0161 vysk\u00fa\u0161a\u0165 <\/p>\n

<\/a><\/p>\n

A pr\u00e1ve satelity dnes funguj\u00fa ako \u201evesm\u00edrne v\u00e1hy\u201c. Dvojica dru\u017e\u00edc NASA v misii GRACE-FO let\u00ed za sebou v presne stanovenej vzdialenosti. Ke\u010f prv\u00fd satelit prelet\u00ed nad oblas\u0165ou so silnej\u0161ou gravit\u00e1ciou, mierne zr\u00fdchli. Vzdialenos\u0165 medzi dvojicou sa zmen\u00ed o mikr\u00f3ny, menej ne\u017e je hr\u00fabka \u013eudsk\u00e9ho vlasu. Tieto miniat\u00farne zmeny vedci zaznamenaj\u00fa a prepo\u010d\u00edtaj\u00fa na mapu gravita\u010dn\u00fdch rozdielov. V\u010faka tomu \u201eodv\u00e1\u017eia\u201c Antarkt\u00eddu bez toho, aby sa dotkli jej povrchu.<\/p>\n

AGL m\u00e1 aj praktick\u00fd v\u00fdznam pre bud\u00facnos\u0165. Oblas\u0165 Rossovho mora sused\u00ed s kritickou \u010das\u0165ou z\u00e1padnej Antarkt\u00eddy, kde le\u017e\u00ed aj zn\u00e1my \u013eadovec Thwaites<\/a>, \u010dasto prez\u00fdvan\u00fd \u201e\u013eadovec s\u00fadneho d\u0148a\u201c. Ak sa tento mas\u00edvny \u013eadovec zr\u00fati do mora, hladina oce\u00e1nov vzrastie o desiatky centimetrov.<\/p>\n

Slab\u0161ia gravit\u00e1cia v regi\u00f3ne m\u00f4\u017ee p\u00f4sobi\u0165 ako jemn\u00e1 \u201egravita\u010dn\u00e1 brzda\u201c. Oce\u00e1nska voda je tu menej pri\u0165ahovan\u00e1 k povrchu, \u010do m\u00f4\u017ee ovplyvni\u0165, ako hlboko sa tepl\u00e1 voda<\/a> dostane pod \u013eadov\u00e9 \u0161elfy a ako r\u00fdchlo ich za\u010dne rozt\u00e1pa\u0165 zospodu.<\/p>\n

\u201eAk lep\u0161ie pochop\u00edme, ako vn\u00fatro Zeme formuje gravit\u00e1ciu a hladiny oce\u00e1nov, z\u00edskame vh\u013ead do faktorov, ktor\u00e9 m\u00f4\u017eu ovplyvni\u0165 rast a stabilitu ve\u013ek\u00fdch \u013eadov\u00fdch \u0161t\u00edtov,\u201c dod\u00e1va Forte.<\/p>\n

\"\u013dadovec,\"\u013dadovec,Zdroj: Wikimedia (Uwe Kils \u2013 CC BY-SA 3.0), Uwe Kils (iceberg) a User: Wiska Bodo (sky).<\/a>
\nPr\u00ednos aj pre monitorovanie kl\u00edmy a \u013eadovcov<\/p>\n

To znamen\u00e1, \u017ee v\u00fdskum gravita\u010dnej diery nesl\u00fa\u017ei len na uspokojenie vedeckej zvedavosti. Presnej\u0161ie modely geoidu umo\u017enia lep\u0161ie odhadn\u00fa\u0165 tempo topenia \u013eadovcov a bud\u00face zmeny hladiny mor\u00ed. Ka\u017ed\u00fd meter rozdielu v projekci\u00e1ch toti\u017e znamen\u00e1 z\u00e1sadn\u00fd rozdiel pre pobre\u017en\u00e9 mest\u00e1 po celom svete.<\/p>\n

Antarktick\u00e1 anom\u00e1lia pritom nie je jedin\u00e1. V Indickom oce\u00e1ne sa nach\u00e1dza podobn\u00e1 gravita\u010dn\u00e1 dolina, ktor\u00fa vedci sp\u00e1jaj\u00fa s v\u00fdstupom menej hust\u00e9ho magmatick\u00e9ho materi\u00e1lu z pl\u00e1\u0161\u0165a. Aj tam sa hladina oce\u00e1nu prepadla o viac ne\u017e sto metrov oproti okoliu.<\/p>\n

\u0160t\u00fadia demon\u0161truje, \u017ee hladina oce\u00e1nu nie je rovn\u00e1 \u010diara a gravit\u00e1cia nie je v\u0161ade rovnak\u00e1. Zem reaguje na pohyby hlboko pod povrchom, ktor\u00e9 sa za\u010dali mili\u00f3ny rokov dozadu. Antarktick\u00e1 \u201egravita\u010dn\u00e1 diera\u201c tak nepredstavuje exotick\u00fa kuriozitu, ale okno do mechanizmov, ktor\u00e9 formuj\u00fa plan\u00e9tu aj jej bud\u00facnos\u0165.<\/p>\n


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<\/p>\n","protected":false},"excerpt":{"rendered":"Antarkt\u00edda ukr\u00fdva pod \u013eadom jednu z najv\u00e4\u010d\u0161\u00edch gravita\u010dn\u00fdch anom\u00e1li\u00ed na plan\u00e9te. V oblasti Rossovho mora tu hladina oce\u00e1nu…\n","protected":false},"author":2,"featured_media":7107,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[4127,225,4128,4129,4130,4131,33,43,4132,40,42,36,50,4133,49,48,4134,3258],"class_list":{"0":"post-7106","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-svet","8":"tag-anomalia","9":"tag-buducnost","10":"tag-geoid","11":"tag-gravitacna-diera","12":"tag-hladina-mora","13":"tag-ladovce","14":"tag-news","15":"tag-sk","16":"tag-slabsia-gravitacia","17":"tag-slovak","18":"tag-slovencina","19":"tag-spravy","20":"tag-svet","21":"tag-tvar-mori","22":"tag-world","23":"tag-world-news","24":"tag-zem","25":"tag-zmeny"},"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts\/7106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/comments?post=7106"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/posts\/7106\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/media\/7107"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/media?parent=7106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/categories?post=7106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/sk\/wp-json\/wp\/v2\/tags?post=7106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}