Saturday, May 7, 2016, 4:00 pm - 6:00 pm
575 Osgood Street
North Andover, MA
Lecture 19: Antarctica – A World of Ice
The lecture of Antarctica isn’t completely in keeping with the rest of our course because it highlights an entire continent as a geologic wonder. But the truth is that most of the continent showcases features that can’t be seen anywhere else on the planet, at least not at this time. Of course, the big story here is ice on a grand scale. The volume of ice in Antarctica is about 25 million cubic kilometers. If it were to melt, the world’s sea levels would rise about 634 meters – more than 200 feet! In this lecture, we’ll look at ice flow in Antarctica and how climate change on the continent affects the rest of the world.
Lecture 20: Columbia Glacier – Unusual Glacier Cycles
In Antarctica and Greenland, which are covered with ice that flows out in all directions, the glaciers are simply massive, both in length and width. These are continental-style glaciers. In these regions, ice flows down to the coasts whether mountains are present or not. In the rest of the world, glaciers operate differently. They snake between and around tall mountain peaks, eroding away the mountains themselves in the process. In this lecture, we’ll discuss alpine glaciers and visit one of the most remarkable glaciers in the world, the Columbia Glacier in Alaska.
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