Friday, August 03, 2007

Glacier Bay Alaska

This glacier shows the blue ice & dirt that is trapped in it as it melts and freezes. (from the Internet) Glacier ice is often a deep blue color. As sunlight passes through the ice it looks white. The light is really made up of all the colors of the rainbow. Each of the sun's colors has different amounts of energy. When sunlight tries to go through the solid glacier ice crystals it gets broken up into lots of colors. Red & yellow have little energy & the thick ice soaks up the red light more than it soaks up the blue light. Blue light has enough extra energy to get away from the solid ice crystals without getting absorbed or soaked up. The blue light has enough energy to escape the ice so that you can see it.


Our glacier guide with snow melting in the background. Notice how green the water is. The melting glaciers and the dirt and ground up rock as the glacier passes over it causes the color.

This was the cruise ship we took for the Portage Glacier tour. It is named for the Alaskan bird th Ptarmigan.(the P is silent)
The main resort in this area.

Barb and an iceberg on the Portage Cruise

New York friends Dick & Mary with the glacier in the background.

One of the bigger icebergs. Many are just small pieces created as the glaciers calf.

This boat has "teeth" to break up the ice in the spring to allow ships to pass.

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