Amber on Ice

"Nacreous clouds are rare, colorful clouds in the stratosphere that can form in the extreme cold of polar winter. They are also known as mother of pearl clouds. Because of their high altitude, nacreous clouds are illuminated by the sunlight from below the horizon and are seen before dawn or after dusk. The colors you see in the clouds are a refraction effect. The light enters the ice crystals, bending around and splitting them much like a prism." (17 Dec 06 Antarctic Sun)

I missed a glorious showing of these back in Winfly -- they had days of
nacreous clouds the week in August prior to my arrival. I did see some on my way home from Dive Tending back in September but nothing like this.