Oldest Antarctic ice ever found shows climate of 2.7 million years ago – Ars Technica
Article Synopsis – Researchers have been using a new method of studying ice in Antarctica that has enabled them to get samples of ice as old as 2.7 million years. The gold standard for studying ice has been ice cores, with the oldest samples at the bottom. This new method studies ice in places where the oldest samples have been squeezed up to the surface against high points of bedrock. The researchers are able to measure greenhouse gas concentrations from trapped air bubbles and indicators of past ocean temperature. This data could be very useful in learning what the composition of the atmosphere was like before the current ice age cycles of the last million years. To read the actual article click here.