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Monday, January 10, 2011

Discovering ancient climates in oceans and ice

Thanks to Allison:

In this video Rob Dunbar discusses climate change. His approach to the subject is to examine the history of different objects in order to predict what might happen now with global warming. For example he has been on multiple trips to Antarctica to drill into the earth, looking at the layers of sediment. They found that in a certain part it has alternated over time 35 times. That means that portion has melted and reformed 35 times. This leads him to predict that in the next 100 years it may melt again, causing a rise in 6 m (which is a lot) of the ocean. He also drilled into a 400 year old coral to discover climate change's effect in the Galapagos Islands. Watch to learn more...

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