View allAll Photos Tagged cloud
Taken from Ecclefechan, Dumfries & Galloway, Scotland.
Nacreous are one of the most beautiful of all cloud formations, but they are also the most destructive to our atmosphere. Their presence encourages the chemical reactions that break down the ozone layer, which acts as an essential shield protecting us from the most harmful of the sun's rays.
Also known as "mother-of-pearl clouds", nacreous clouds exhibit spectacular iridescent pastel colours, caused by the sunlight diffracting as it passes around their tiny ice crystals.
Since they form much higher than common clouds - at altitudes of between 12 and 15 miles - nacreous clouds are most apparent around sunrise and sunset when their colours stand out against the darkened sky. The stratosphere is extremely dry, compared with the cloud-filled lower atmosphere, so the air needs to be very cold indeed for any ice crystals to be able to form there.
Nacreous clouds only appear when stratospheric temperatures are below -83C.
Storm clouds appeared at dusk, though the worst of the storms didn't arrive until early the following morning. A massive change in the weather, from 30C down to about 18C, & my parched garden has had rain on it at last.
Awesome clouds that apprently mean a storm is looming. We saw lightening and heard thunder, but no rain!
A view out the plane window before taxiing for takeoff from Austin. I found converting to Black & White brought out a nice total contrast in the white's, gray's, and black's of the clouds.
You be the anchor that keeps my feet on the ground. I’ll be the wings that keep your heart in the clouds
-Mayday Parade
From the plane coming back from Florida :)