Antarctic pack ice

I recently took a flight from Australia to South Africa. Here is the Antarctic pack ice as seen from the air.


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The Great Lakes, frozen

The NASA image above, from the Aqua satellite, shows the heavily frozen Great Lakes on February 19. In the image, water appears blue-black and ice pale blue. Blue-green areas are snow or clouds. I’m sure that my northern readers are glad winter’s over!

The crushing weight of ice

The legendary XKCD is, by turns, funny and educational. The above entry (full-size image and mouse-over text here) illustrates brilliantly the thickness of the Laurentide ice sheet during the height of the Wisconsin glaciation. The enormous weight of that ice sheet had an impact of course – as the diagram below indicates, the continent is still rebounding. At quite a few millimetres per year.