[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.212sqn.cz\/geomagneticke-poly\/#Article","mainEntityOfPage":"https:\/\/www.212sqn.cz\/geomagneticke-poly\/","headline":"Geomagnetick\u00e9 p\u00f3ly","name":"Geomagnetick\u00e9 p\u00f3ly","description":"Zem\u011b se skl\u00e1d\u00e1 z n\u011bkolika sf\u00e9r, jimi\u017e jsou zemsk\u00e1 k\u016fra (SiAl) –  je tvo\u0159ena p\u0159ev\u00e1\u017en\u011b hlin\u00edkov\u00fdmi k\u0159emi\u010ditany, je tuh\u00e1, ale tenk\u00e1; zemskou k\u016fru rozli\u0161ujeme na kontinent\u00e1ln\u00ed o tlou\u0161\u0165ce 35 – 40 km a na oce\u00e1nskou, kter\u00e1 m\u00e1 tlou\u0161\u0165ku 8 – 10 … ","datePublished":"2020-01-14","dateModified":"2023-05-05","author":{"@type":"Person","@id":"https:\/\/www.212sqn.cz\/author\/#Person","name":"","url":"https:\/\/www.212sqn.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/ee69a086fc043006d66000ff5e288b6b088fc8fa323128f3849437410a854832?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ee69a086fc043006d66000ff5e288b6b088fc8fa323128f3849437410a854832?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"212sqn.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.212sqn.cz\/wp-content\/uploads\/img_a367911_w4406_t1580317594.jpg","url":"https:\/\/www.212sqn.cz\/wp-content\/uploads\/img_a367911_w4406_t1580317594.jpg","height":0,"width":0},"url":"https:\/\/www.212sqn.cz\/geomagneticke-poly\/","about":["V\u011bda"],"wordCount":415,"articleBody":"Zem\u011b se skl\u00e1d\u00e1 z n\u011bkolika sf\u00e9r, jimi\u017e jsou\t\tzemsk\u00e1 k\u016fra (SiAl) –  je tvo\u0159ena p\u0159ev\u00e1\u017en\u011b hlin\u00edkov\u00fdmi k\u0159emi\u010ditany, je tuh\u00e1, ale tenk\u00e1; zemskou k\u016fru rozli\u0161ujeme na kontinent\u00e1ln\u00ed o tlou\u0161\u0165ce 35 – 40 km a na oce\u00e1nskou, kter\u00e1 m\u00e1 tlou\u0161\u0165ku 8 – 10 km\t\tpl\u00e1\u0161\u0165 (SiMa) –  tato st\u0159edn\u00ed vrstva je bohat\u00e1 na ho\u0159\u010d\u00edk a k\u0159emi\u010ditany\t\tzemsk\u00e9 j\u00e1dro (Nife) – shluky hlavn\u011b niklu a \u017eeleza; j\u00e1dro m\u00e1 dv\u011b vrstvy, a to vn\u011bj\u0161\u00ed, kter\u00e1 je kapaln\u00e1 a vnit\u0159n\u00ed vrstva je pevn\u00e1V\u0161echny vrstvy jsou tedy odli\u0161n\u00e9, a to hlavn\u011b hustotou, tlou\u0161\u0165kou a slo\u017een\u00edm.D\u00edky j\u00e1dru –  jeho slo\u017een\u00ed a zm\u011bn\u00e1m, kter\u00e9 v n\u011bm prob\u00edhaj\u00ed, existuje geomagnetick\u00e9 pole Zem\u011b. Vznik\u00e1 tak, \u017ee elektricky vodiv\u00e1 hmota v zemsk\u00e9m j\u00e1dru rotuje jinou rychlost\u00ed, ne\u017e ostatn\u00ed zemsk\u00e9 sf\u00e9ry. Neple\u0165me si geomagnetick\u00fd p\u00f3l (osa magnetick\u00e9ho pole prot\u00edn\u00e1 zemsk\u00fd povrch) s geografick\u00fdm p\u00f3lem Zem\u011b (osa zemsk\u00e9 rotace prot\u00edn\u00e1 povrch. Oba druhy p\u00f3l\u016f jsou severn\u00ed i ji\u017en\u00ed a v\u0161eobecn\u011b se v\u00ed, \u017ee se geomagnetick\u00e9 zemsk\u00e9 p\u00f3ly pohybuj\u00ed. Je to zp\u016fsobeno roztaven\u00fdm \u017eelezem (teplota asi tak 4 – 5 tis\u00edc stup\u0148\u016f Celsia) v j\u00e1dru planety. Pohyby p\u00f3l\u016f mohou b\u00fdt tak velik\u00e9, \u017ee mohou zp\u016fsobit i zm\u011bnu sv\u00e9 polarity. Tento jev, kdy se jih nach\u00e1zel na severu a obr\u00e1cen\u011b, nastal naposledy asi p\u0159ed 770 tis\u00edci lety.V posledn\u00edch deseti letech v\u011bdci zjistili, \u017ee se severn\u00ed geomagnetick\u00fd p\u00f3l chov\u00e1 dost podivn\u011b. Z nezn\u00e1m\u00e9ho d\u016fvodu do\u0161lo ke zpomalen\u00ed jeho pohybu z 54 km za hodinu na pouh\u00fdch 40 km\/hod. V\u00fdznamn\u00fd geolog Ciaran Beggan k tomu uvedl, cituji: „Stav, kter\u00fd nastal za posledn\u00ed desetilet\u00ed, pouze potvrdil, jak m\u00e1lo v\u00edme o zemsk\u00e9m j\u00e1dru. Do roku 2040 budou pravd\u011bpodobn\u011b v\u0161echny kompasy ukazovat odchylku od severu sm\u011brem na v\u00fdchod".Dal\u0161\u00ed sv\u011btov\u00e9 kapacity v oblasti fyziky a geologie odhaduj\u00ed, \u017ee by se magnetick\u00e9 pole mohlo znovu chystat ke sv\u00e9mu obr\u00e1cen\u00ed. Ur\u010dit v\u0161ak, kdy by se to m\u011blo st\u00e1t, anebo jestli v\u016fbec tento jev nastane – to vlastn\u011b ani nejde. S nejv\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed se to pr\u00fd za na\u0161eho \u017eivota nestane.                                                                                                                                                                                                                                                                                                                                                                                        4.2\/5 - (10 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Geomagnetick\u00e9 p\u00f3ly","item":"https:\/\/www.212sqn.cz\/geomagneticke-poly\/#breadcrumbitem"}]}]