Rød fe: Forskelle mellem versioner

'''Røde feer''' er storskala [[elektrisk udladning|elektriske udladninger]], som sker højt over [[tordenvejr]]sskyer eller [[Cumulonimbussky]]er. Røde feer udløses nogle gange af [[positiv lynudladning|positive lynudladninger]] mellem en underliggende [[tordensky]] og [[jordoverfladen]].<ref name="boccippio">{{cite journal | last = Boccippio | first = D. J., et al.| title = Sprites, ELF Transients, and Positive Ground Strokes| journal = Science | volume = 269 | pages = 1088–1091 | month = August| year = 1995

| doi = 10.1126/science.269.5227.1088 | pmid = 17755531 }}</ref>

 

Røde feer dannes ofte i klynger indenfor højdeintervallet 50-90 km over jordoverfladen.<ref name=penn>[http://www.sciencedaily.com/releases/2014/05/140507100423.htm Penn State. (2014, May 7). Sprites form at plasma irregularities in the lower ionosphere. ScienceDaily] Citat: "...Sprites are an optical phenomenon that occur above thunderstorms in the D region of the ionosphere, the area of the atmosphere just above the dense lower atmosphere, about 37 to 56 miles above Earth...Sprites occur above thunderstorms, but thunderstorms, while necessary for the appearance of a sprite, are not sufficient to initiate sprites. All thunderstorms and lightning strikes do not produce sprites. Recent modeling studies show that plasma irregularities in the ionosphere are a necessary condition for the initiation of sprite streamers, but no solid proof of those irregularities existed..."</ref>

 

 

[[Fil:Sprite from ISS (cropped).jpg|thumb|En rød fe set fra [[Den Internationale Rumstation|ISS]] (det svage rødlige lys over det kraftigt hvide lys).]]