Looking up...."Iridescent Clouds"....and seeing a hundred different examples.
And then Looking up "Circumhorizontal Arc", I find them to be similar, but not necessarily the same.
I.C.s can be Water Droplets...not just Ice Crystals....CHAs....would be Ice Crystals....
Circumhorizontal Arcs ALWAYS HAVE.....Red on top....Blue underneath.....they also seem to me...to stretch straight across the sky...where as. I.C.s are a "lit up cloud". CHA's....can be just a small patch of the halo.... The CHA is the LOWER part of a halo....Red in the center of the halo...blue on the outside....thus....the bottom of the halo...Red always on top....
http://www.abovetopsecret.com/forum/thread873605/pg
"Circumhorizon arcs (or CHAs) will always have the same sequence of colours (red on top and blue underneath), and will always be found below the sun in the sky, when it's at a high enough altitude (58° or above) above the horizon. Crucially, the colours will always be in distinct horizontal bands"
A Circumhorizontal Arc is a PART OF A HALO!!! A lower, second, Ice halo...the Sun is always ABOVE IT.....in the Center.
If you Wikipedia the two phenomena...you will see the differences....there is a good example of A Circumhorizontal Arc....and the HALO...where as I.C.s are almost "backlit"....
This IS a Circumhorizontal Arc....I think the Photog got it right.
:---[===] *
Looking up...."Iridescent Clouds"....and seeing a hundred different examples.
And then Looking up "Circumhorizontal Arc", I find them to be similar, but not necessarily the same.
I.C.s can be Water Droplets...not just Ice Crystals....CHAs....would be Ice Crystals....
Circumhorizontal Arcs ALWAYS HAVE.....Red on top....Blue underneath.....they also seem to me...to stretch straight across the sky...where as. I.C.s are a "lit up cloud". CHA's....can be just a small patch of the halo.... The CHA is the LOWER part of a halo....Red in the center of the halo...blue on the outside....thus....the bottom of the halo...Red always on top....
[url]http://www.abovetopsecret.com/forum/thread873605/pg[/url]
"Circumhorizon arcs (or CHAs) will always have the same sequence of colours (red on top and blue underneath), and will always be found below the sun in the sky, when it's at a high enough altitude (58° or above) above the horizon. Crucially, the colours will always be in distinct horizontal bands"
A Circumhorizontal Arc is a PART OF A HALO!!! A lower, second, Ice halo...the Sun is always ABOVE IT.....in the Center.
If you Wikipedia the two phenomena...you will see the differences....there is a good example of A Circumhorizontal Arc....and the HALO...where as I.C.s are almost "backlit"....
This IS a Circumhorizontal Arc....I think the Photog got it right.
:---[===] *