The thickness of the Greenland Ice Sheet at the location the ice core was drilled was found to be 3,053 meters and the bottom section of ice core was estimated to be around 250,000 years old. But because the ice sheet is constantly flowing, and annual layers of ice sometimes becomes distorted near the bottom, the scientists were not able to measure every single annual layer of ice throughout all the ice cores. Scientists were able to identify and measure every single annual layer of snow from the top of the column down to a depth of 2,808 meters which corresponds to an age of 110,000 years. With each layer of annual snow it was found that, like tree rings, the thickness of every single annual layer of snow is not the same thickness. From these annual layers of snow scientists were able to determine many things about the conditions present in the atmosphere and on the surface of the ice sheet in Greenland during the time the snow was deposited.

3. Why do you think that the thickness of the ice from
0-110,000 years is not proportional to the thickness of the ice from 110,000 years to 250,000 years? What is the general trend in thickness of the ice layers as you get deeper?