{"id":16173,"date":"2014-06-13T11:38:25","date_gmt":"2014-06-13T09:38:25","guid":{"rendered":"https:\/\/www.agencija-oskar.si\/blog\/?p=16173"},"modified":"2014-06-13T11:38:25","modified_gmt":"2014-06-13T09:38:25","slug":"severni-sij","status":"publish","type":"post","link":"https:\/\/www.agencija-oskar.si\/blog\/severni-sij\/","title":{"rendered":"Severni sij"},"content":{"rendered":"<p><img decoding=\"async\" class=\"alignright size-medium wp-image-16175\" alt=\"Islandija - Polarni sij, ledeniki\" src=\"https:\/\/www.agencija-oskar.si\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij-ledeniki-300x199.jpg\" width=\"300\" height=\"199\" \/>Severni sij je pojav na no\u010dnem nebu, ki je viden ve\u010dinoma na obmo\u010djih z visoko zemljepisno \u0161irino. Poznamo ga tudi pod imenom aurora borealis, po rimski boginji jutranje zarje, Aurori, in gr\u0161kem imenu za severni veter, boreas. Podoben pojav je zna\u010dilen tudi za ju\u017eno poloblo, kjer ga imenujejo aurora australis.<br \/>\nPolarno svetlobo povzro\u010da son\u010dni veter. To je energija vro\u010de plazme, ki jo sonce razme\u010de v vse smeri. Na svoji poti skozi vesolje del son\u010devega vetra prihaja v zemeljsko magnetosfero. Polarna svetloba nastane, ko nabiti delci son\u010devega vetra in magnetosfere tr\u010dijo z atomi zgornjih slojev atmosfere, zemljino magnetno polje pa jih nato usmeri v atmosfero, kjer reagirajo in posledi\u010dno zasvetijo. Polarni sij se pojavlja zlasti v polarnih obmo\u010djih, saj potujejo delci v son\u010devem vetru po magnetnih silnicah zemeljskega magnetnega polja, ki imajo za\u010detek in konec v magnetnih polih Zemlje.<br \/>\n<img decoding=\"async\" class=\"alignleft size-medium wp-image-16176\" alt=\"Islandija - Polarni sij\" src=\"https:\/\/www.agencija-oskar.si\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij2-300x198.jpg\" width=\"300\" height=\"198\" \/>Polarni siji imajo lahko razli\u010dne barve. \u0160ibki polarni siji so pogosto bele barve, bolj poudarjeni pa rumenozelene in rde\u010de barve. Te barve nastanejo zato, ker atomi v zgornjih predelih atmosfere (v glavnem atomarni kisik) fluorescirajo, ko jih zadenejo hitri nabiti delci. Zelena svetloba nastane pri reakciji z atomi kisika, ki preidejo v vzbujeno energijsko stanje na vi\u0161ini 100 km, rde\u010da svetloba pa nastane pri isti reakciji, le na vi\u0161ini 200 km. Vzbujeni du\u0161ikovi atomi iz\u017earevajo modro do vijoli\u010dno svetlobo. Da du\u0161ikovi atomi preidejo v vzbujeno stanje, je potrebna zelo velika koli\u010dina energije, tako da je te barve mo\u010d videti samo pri mo\u010dnih son\u010devih vetrovih.<br \/>\n<img decoding=\"async\" class=\"alignright size-medium wp-image-16177\" alt=\"Islandija - Polarni sij\" src=\"https:\/\/www.agencija-oskar.si\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij1-300x198.jpg\" width=\"300\" height=\"198\" srcset=\"https:\/\/www.agencija-oskar.si\/blog\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij1-300x198.jpg 300w, https:\/\/www.agencija-oskar.si\/blog\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij1-768x507.jpg 768w, https:\/\/www.agencija-oskar.si\/blog\/wp-content\/uploads\/sites\/2\/2014\/06\/Islandija-polarni-sij1-1024x676.jpg 1024w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\u010ceprav redko, se aurora lahko vidi na srednjih zemljepisnih \u0161irinah kot rde\u010dkasti sjaj na severnem obzorju. Naprej proti severu, blizu te\u010daja, pa je polarna svetloba pogosto videti kot velika plamte\u010da zavesa, ki visi z neba in niha levo-desno, med tem ko po njegovih naborkih trepetjo oran\u017eni, zeleni in plavi plameni. Na <a title=\"Islandija potovanje\" href=\"https:\/\/www.agencija-oskar.si\/islandija\/\"><strong>Islandiji<\/strong><\/a> je severni sij najlep\u0161e viden jeseni, pa tudi spomladi, \u010de je le dovolj jasna no\u010d.<br \/>\n&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Severni sij je pojav na no\u010dnem nebu, ki je viden ve\u010dinoma na obmo\u010djih z visoko zemljepisno \u0161irino. Poznamo ga tudi pod imenom aurora borealis, po rimski boginji jutranje zarje, Aurori, in gr\u0161kem imenu za severni veter, boreas. Podoben pojav je zna\u010dilen tudi za ju\u017eno poloblo, kjer ga imenujejo aurora australis. Polarno svetlobo povzro\u010da son\u010dni veter. To je energija vro\u010de plazme, ki jo sonce razme\u010de v vse smeri. Na svoji poti skozi vesolje del son\u010devega vetra [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ngg_post_thumbnail":0,"footnotes":""},"categories":[4,222],"tags":[],"class_list":["post-16173","post","type-post","status-publish","format-standard","hentry","category-agencija-oskar","category-islandija"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.10 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"sibit\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.agencija-oskar.si\/blog\/severni-sij\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Agencija Oskar - Blog | Agencija Oskar - Blog, mnenja, vtisi potnikov\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Severni sij | Agencija Oskar - 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