{"id":34862,"date":"2024-11-28T15:14:01","date_gmt":"2024-11-28T14:14:01","guid":{"rendered":"https:\/\/www.snowtrex.de\/magazin\/?p=34862"},"modified":"2025-06-26T15:10:46","modified_gmt":"2025-06-26T13:10:46","slug":"lekce-snehu","status":"publish","type":"post","link":"https:\/\/www.snowtrex.cz\/magazin\/bezpecnost-pri-lyzovani\/lekce-snehu\/","title":{"rendered":"Kouzeln\u00e1 b\u00edl\u00e1: mal\u00e1 sn\u011bhov\u00e1 lekce pro ly\u017ea\u0159e"},"content":{"rendered":"

Sn\u00edh je fascinuj\u00edc\u00ed p\u0159\u00edrodn\u00ed \u00fakaz: no\u010dn\u00ed sn\u011b\u017een\u00ed m\u016f\u017ee n\u00e1sleduj\u00edc\u00ed r\u00e1no pokr\u00fdt celou krajinu n\u00e1dhernou b\u00edlou vrstvou. Sn\u00edh si samoz\u0159ejm\u011b cen\u00ed zejm\u00e9na ly\u017ea\u0159i a snowboardist\u00e9, proto\u017ee bez n\u011bj by nebylo zimn\u00edch sport\u016f. Spole\u010dnost SnowTrex<\/a> v\u0161ak tak\u00e9 v\u00ed, \u017ee sn\u00edh je n\u011bkdy nep\u0159edv\u00eddateln\u00fd a skr\u00fdv\u00e1 nebezpe\u010d\u00ed. O to d\u016fle\u017eit\u011bj\u0161\u00ed je porozum\u011bt tomuto fenom\u00e9nu, abyste mohli na zasn\u011b\u017een\u00fdch svaz\u00edch bezpe\u010dn\u011b ly\u017eovat.<\/strong><\/p>\n

\n
\n \"Nedot\u010den\u00e9<\/a>
\u00a9 Jag_cz\/shutterstock.de<\/div>\n <\/div>\n
Nedot\u010den\u00e9 pra\u0161anov\u00e9 svahy: sen ka\u017ed\u00e9ho freeridera<\/div>\n <\/div > \n
\n <\/span><\/p>\n
\n Obsah\n <\/div>\n
\n Pro\u010d sn\u011b\u017e\u00ed?<\/span><\/a>Ne v\u0161echen sn\u00edh je stejn\u00fd<\/span><\/a>P\u0159ehl\u00ed\u017een\u00e9 nebezpe\u010d\u00ed: zasn\u011b\u017een\u00e9 stromy<\/span><\/a>Sedm neobvykl\u00fdch fakt\u016f o sn\u011bhu<\/span><\/a>Nej\u010dast\u011bj\u0161\u00ed dotazy o sn\u011bhu<\/span><\/a>\n <\/div>\n<\/p><\/div>\n
\n

Pro\u010d sn\u011b\u017e\u00ed?<\/h2>\n

Mnoho lid\u00ed se domn\u00edv\u00e1, \u017ee sn\u00edh je zmrzl\u00e1 voda. Ale nen\u00ed to tak jednoduch\u00e9. Ne\u017e za\u010dne sn\u011b\u017eit, mus\u00ed prob\u011bhnout \u0159ada chemick\u00fdch a fyzik\u00e1ln\u00edch proces\u016f. To sice nen\u00ed magie, ale nen\u00ed to o nic m\u00e9n\u011b p\u016fsobiv\u00e9.<\/p>\n

Sn\u00edh za\u010d\u00edn\u00e1 jako vodn\u00ed p\u00e1ra. Voda na zemi, nap\u0159\u00edklad z jezer nebo \u0159ek, stoup\u00e1 vlivem tepla do vzduchu jako p\u00e1ra a jindy tvo\u0159\u00ed mraky. \u010c\u00edm v\u00fd\u0161e p\u00e1ra stoup\u00e1, t\u00edm je chladn\u011bji a t\u00edm men\u0161\u00ed je tlak v atmosf\u00e9\u0159e. V d\u016fsledku toho jsou molekuly vodn\u00ed p\u00e1ry velmi pohybliv\u00e9 a nev\u00e1\u017e\u00ed se na sebe. Pokud je mrak dostate\u010dn\u011b chladn\u00fd, tj. kolem -12 stup\u0148\u016f Celsia, molekuly vodn\u00ed p\u00e1ry ulp\u00edvaj\u00ed na nejmen\u0161\u00edch prachov\u00fdch \u010d\u00e1stic\u00edch ve vzduchu. Molekuly se skl\u00e1daj\u00ed ze dvou atom\u016f vod\u00edku a jednoho atomu kysl\u00edku, kter\u00e9 k sob\u011b sv\u00edraj\u00ed ur\u010dit\u00fd \u00fahel. V\u00fdsledkem je, \u017ee kdy\u017e se molekuly ovinou kolem \u010d\u00e1stic, vznikne v\u017edy \u0161esti\u00faheln\u00edk. Vznik\u00e1 tak typick\u00fd krystalick\u00fd tvar sn\u011bhov\u00fdch vlo\u010dek.<\/p>\n

Dal\u0161\u00ed molekuly vodn\u00ed p\u00e1ry se nyn\u00ed v\u00e1\u017eou na ka\u017ed\u00fd ze \u0161esti roh\u016f, dokud mrak nezat\u00ed\u017e\u00ed natolik, \u017ee se ji\u017e nem\u016f\u017ee udr\u017eet ve vzduchu a molekuly spadnou dol\u016f jako sn\u011bhov\u00e9 vlo\u010dky.<\/p>\n

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The surprising science of snow crystals<\/div><\/div>
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