posted on May, 20 2011 @ 09:10 AM
reply to post by AstraCat
Energy moves through the atmosphere like it does through water, in waves. (Actually all energy moves in waves, but I'm sticking with the topic at
hand alone). Waves are regular, until the energy goes away. What you see is waves of wind showing up on a cirrus cloud layer. When these waves show
up it make the cloud an undulatus. What you are looking at is a cirrostratus undulatus cloud.
And the cross-hatching effect shows the cloud was shaped by winds from two different directions. In different clouds at a different altitude most
likely. Cirrus clouds can be very thin and see through.
Here's a picture:
This cloud is a cumulocirrus, a bit thicker than the one you pictured. See how the lines are parallel? Wind. If you look at the upper left corner,
there are lines of clouds going in a different direction. Different wind. This picture was published in 1905, before airplanes.
As far as the lines going to a point, that's perspective. Most likely they are crepuscular waves. Here's a great site, with explanations. I've
set up the first page, navigate through the topic with the upper-right side arrows. There are about 8 pages, and show lots of pictures with the rays
being more obvious than your pictures.