Reply to thread

Message: <blockquote data-quote="Wolverine GTR" data-source="post: 18830390" data-attributes="member: 158020">-Fire Rainbows- “Fire Rainbows” are neither fire, nor rainbows, but are so called  because of their brilliant pastel colors and flame like appearance.  Technically they are known as circumhorizontal arc - an ice halo formed  by hexagonal, plate-shaped ice crystals in high level cirrus clouds. The  halo is so large that the arc appears parallel to the horizon, hence  the name. Brightly colored circumhorizontal arc occur mostly  during the summer and between particular latitudes. When the sun is very  high in the sky, sunlight entering flat, hexagon shaped ice crystals  gets split into individual colors just like in a prism. The conditions  required to form a “fire rainbow” is very precise – the sun has to be at  an elevation of 58° or greater, there must be high altitude cirrus  clouds with plate-shaped ice crystals, and sunlight has to enter the ice  crystals at a specific angle. This is why circumhorizontal arc is such a  rare phenomenon. A colourful circumhorizon arc spans the sky near Fredericton, New Brunswick, Canada, in 2003.The  position of the observer is also important. Circumhorizontal arcs  cannot be seen in locations north of 55°N or south of 55°S. Likewise  there are certain times of the year when they are visible. For example,  in London, England the sun is only high enough for 140 hours between  mid-May and late July. While in Los Angeles, the sun is higher than 58  degrees for 670 hours between late March and late September. Circumhorizontal  arcs should not be confused with Iridescent clouds, which can produce a  similar effect. While circumhorizontal arc occur only in cirrus clouds,  iridescence often occur in altocumulus, cirrocumulus clouds and  lenticular clouds but very rarely in cirrus clouds. <img src="http://lh6.ggpht.com/-_mPzoymHntU/UZjxlWRsSvI/AAAAAAAAolU/2l-28oysH38/fire-rainbows-2%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh6.ggpht.com/-2apjNX91-W4/UZjxoh9HEdI/AAAAAAAAolc/yeX-aiiMIJ4/fire-rainbows-9%25255B5%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizon arcs are so large that sometimes we see only parts of them  where they happen to 'light' fragments of cirrus cloud. Ed Johnson  (site) captured this one on June 8, 2003 on Mount Baden-Powell,  California <img src="http://lh5.ggpht.com/-jZt2SkP_3Uc/UZjxryA5YYI/AAAAAAAAolk/OCwgG8P5pCo/fire-rainbows-12%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizon arcs are so huge that their colours sometimes appear to be  those of the sky itself rather than an ice crystal halo. In this  long-lens shot the halo forms a backdrop to a seemingly tiny aircraft.  Picture taken at Pilesgrove, New Jersey in July 22, 2007 <img src="http://lh3.ggpht.com/-FlK2h8eQbiI/UZjxvGBiOcI/AAAAAAAAols/2vr6lO7wP8M/fire-rainbows-1%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> This circumhorizon display was photographed through a polarized lens above Dublin, Ohio, in May 2009. <img src="http://lh6.ggpht.com/-RaQAyq4dG7M/UZjxyLKBaZI/AAAAAAAAol0/blLVsOk6-N4/fire-rainbows-3%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizon Arc in Alentejo, Portugal, 2006. <img src="http://lh4.ggpht.com/-Y7p5qBP1xCU/UZjx1DyXlhI/AAAAAAAAol8/OpS3J_OkxcQ/fire-rainbows-4%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizontal arc in Scottsdale, Arizona in 2009 <img src="http://lh6.ggpht.com/-3wt5vld5JjY/UZjyIeQs2HI/AAAAAAAAomM/nE3vkjBK-AU/fire-rainbows-5%25255B3%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Cirrus fragments lit by a circumhorizon arc, Halifax, Nova Scotia, on 3rd July 2001 with the sun 66° high. <img src="http://lh4.ggpht.com/-El-9EYdC1SY/UZjyJhf5L4I/AAAAAAAAomU/Y1DRLtq59tM/fire-rainbows-6%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> This peculiar 'braided' circumhorizon arc was possibly formed by plate  crystals in high cirrus fibratus cloud. Pictures taken at Silver City,  New Mexico, USA during August 2004. <img src="http://lh3.ggpht.com/-itAXC2jnFnA/UZjyKyHLiPI/AAAAAAAAomc/J-RGrTJ7NVc/fire-rainbows-7%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizontal arc seen over Switzerland in June 2007 <img src="http://lh3.ggpht.com/-GEU8AeTgQVo/UZjyMax5H7I/AAAAAAAAomk/sZXamP4AF44/fire-rainbows-8%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizon arcs are often seen between lower obscuring clouds. This one was seen in Redding, CA in June 2004. <img src="http://lh5.ggpht.com/-CzrX4YKCEIM/UZjyN7nly7I/AAAAAAAAoms/8AQnPJ4--x0/fire-rainbows-10%25255B3%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizontal arc in Spokane Valley in June 2006 <img src="http://lh3.ggpht.com/-ccw0epfE0_8/UZjyQL_GqhI/AAAAAAAAom0/ptp6jCl84Fw/fire-rainbows-11%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Circumhorizontal arc seen in Spokane Washington State, in June 3, 2006 when the sun was 64° high</blockquote>

Verification: Haya warak paha keeyada? (haya wadi kireema paha)

Top Bottom