climateass6

climateass6 - 1.The younger dryas was an event that started...

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1.The younger dryas was an event that started to occur nearly 13,000 years ago. It was basically huge fluctuations in the temperature during the warming up phase after the glacial period. This mainly occurred between 16000 and 11000 years ago and it was found that the temperature changed about 7 degrees over the span of 20years. They have also said that the termination of the younger dryas was marked by heinrich events. Also during the heating up phase there was a point where you can say that the northern hemisphere was freezing over because of the drastic change in temperature. 2.Two proxies would be ice cores, and lake and marine sediments. In the ice cores they can see the different layers and where there was periods where there were accumulations and other years where there was no accumulations occurring and melting occurred in its place. This would be marked by a black, dirty, dark layer in the ice cores. For the lake and marine sediment cores, they would be checking the sediment cores found in the ocean and if they find lake sediments inside the ocean they would know that there was a melting that occurred over northern America and was then drained through the St Lawrence river into the ocean. 3.We can say that
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This document was uploaded on 03/26/2010.

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climateass6 - 1.The younger dryas was an event that started...

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