{"id":3175,"date":"2017-11-21T16:01:25","date_gmt":"2017-11-21T14:01:25","guid":{"rendered":"http:\/\/linde-stories.com\/se\/?p=3175"},"modified":"2018-02-28T10:46:58","modified_gmt":"2018-02-28T09:46:58","slug":"det-magiska-norrskenet","status":"publish","type":"post","link":"https:\/\/linde-stories.com\/se\/det-magiska-norrskenet\/","title":{"rendered":"Det magiska norrskenet"},"content":{"rendered":"

Visste du att gaser bidrar till f\u00e4rgspelet?<\/p>\n

\"\"F\u00e4rgerna
\n<\/strong>Norrsken visar sig i olika f\u00e4rger och f\u00e4rgen beror p\u00e5 hur h\u00f6gt upp i atmosf\u00e4ren fenomenet uppst\u00e5r. Gr\u00f6nt \u00e4r den vanligaste f\u00e4rgen i norrsken.
\nIllustration: Unni Bekkevold<\/em><\/div>\n

Norrskenet \u00e4r en fascinerande syn och m\u00e4nniskor vallf\u00e4rdar till polaromr\u00e5dena f\u00f6r att f\u00e5 se den spektakul\u00e4ra ljusshowen. F\u00e4rgspelet \u00e4r aldrig detsamma fr\u00e5n g\u00e5ng till g\u00e5ng. Av och till skymtar man gr\u00f6nt i horisonten och andra g\u00e5nger dansar b\u00f6ljande m\u00f6nster i gr\u00f6nt, r\u00f6tt, lila och bl\u00e5tt p\u00e5 himlen.<\/p>\n

Hur uppst\u00e5r norrsken?
\n<\/strong>Den vetenskapliga termen f\u00f6r fenomenet \u00e4r polarsken<\/a>, aurora polaris, och det kallas norrsken (aurora borealis<\/em>) n\u00e4r det upptr\u00e4der p\u00e5 norra halvklotet och s\u00f6dersken (aurora australis) n\u00e4r det upptr\u00e4der p\u00e5 s\u00f6dra halvklotet. Fenomenet handlar om ren fysik och b\u00f6rjar p\u00e5 solen. Solen roterar kring sin egen axel samtidigt som den slungar ut solvindar<\/a>. En solvind \u00e4r en str\u00f6m av laddade partiklar, i huvudsak elektroner<\/a> och protoner<\/a>. Med en hastighet p\u00e5 \u00e5tta miljoner kilometer i timmen p\u00e5b\u00f6rjar partiklarna den l\u00e5nga resan mot jorden och p\u00e5 arton timmar har de avverkat de 150 miljoner kilometerna. Partiklarna dras mot jordens magnetf\u00e4lt, och n\u00e4r de tr\u00e4ffar jordens atmosf\u00e4r med h\u00f6g hastigheten f\u00e5r kollisionen gaserna i atmosf\u00e4ren att lysa eftersom de tillf\u00f6rs energi. Detta sker oftast i den \u00f6vre delen av atmosf\u00e4ren, ungef\u00e4r 80\u2013300 km ovanf\u00f6r marken, och s\u00e4llan \u00f6ver 500 km.<\/p>\n

Se video som f\u00f6rklarar fenomenet p\u00e5 visitnorway.com<\/a> h\u00e4r.<\/p>\n

Var och n\u00e4r kan man se norrsken?
\n<\/strong>Aktivitet p\u00e5 solen styr hur ofta norrsken uppst\u00e5r och hur intensivt det \u00e4r och fenomenet f\u00f6rekommer n\u00e4r solvinden<\/a> \u00e4r starkare \u00e4n normalt. Jordens magnetf\u00e4lt<\/a> och atmosf\u00e4r \u00e4r dock det som best\u00e4mmer var norrskenet upptr\u00e4der. Norrsken kan ses p\u00e5 det norra halvklotet i ett ovalformat omr\u00e5de centrerat \u00f6ver den magnetiska polen.<\/p>\n

Nord-Norge \u00e4r platsen att resa till om du vill ha goda m\u00f6jligheter att f\u00e5 uppleva norrsken. Under vinterm\u00e5naderna fr\u00e5n september till april, f\u00f6retr\u00e4desvis under timmarna f\u00f6re midnatt en stj\u00e4rnklar kv\u00e4ll med lite m\u00e5nsken, \u00e4r det st\u00f6rst chans att f\u00e5 se norrsken.<\/p>\n

H\u00e4r hittar du norrskensprognos<\/a>.<\/p>\n

Text: Unni Bekkevold
\nFoto: Shutterstock<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Visste du att gaser bidrar till f\u00e4rgspelet? F\u00e4rgerna Norrsken visar sig i olika f\u00e4rger och f\u00e4rgen beror p\u00e5 hur h\u00f6gt upp i atmosf\u00e4ren fenomenet uppst\u00e5r. Gr\u00f6nt \u00e4r den vanligaste f\u00e4rgen i norrsken. Illustration: Unni Bekkevold Norrskenet \u00e4r en fascinerande syn och m\u00e4nniskor vallf\u00e4rdar till polaromr\u00e5dena f\u00f6r att f\u00e5 se den spektakul\u00e4ra ljusshowen. F\u00e4rgspelet \u00e4r aldrig detsamma fr\u00e5n g\u00e5ng till g\u00e5ng. Av och till skymtar man gr\u00f6nt i horisonten och andra g\u00e5nger dansar b\u00f6ljande m\u00f6nster i gr\u00f6nt, r\u00f6tt, lila och bl\u00e5tt p\u00e5 himlen. Hur uppst\u00e5r norrsken? Den vetenskapliga termen f\u00f6r fenomenet \u00e4r polarsken, aurora polaris, och det kallas norrsken (aurora borealis) <\/p>\n","protected":false},"author":4,"featured_media":3173,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"acf":[],"yoast_head":"\nDet magiska norrskenet – Linde Stories<\/title>\n<meta name=\"description\" content=\"Norrskenet \u00e4r en fascinerande syn och m\u00e4nniskor vallf\u00e4rdar till polaromr\u00e5dena f\u00f6r att f\u00e5 se den spektakul\u00e4ra ljusshowen. F\u00e4rgspelet \u00e4r aldrig detsamma fr\u00e5n g\u00e5ng till g\u00e5ng. 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