Ice layer dating
DR KATJA RIEDEL We date ice cores by looking into historic events that we know how and when they happened. When you have a volcano erupting you have ash for example in the atmosphere.And this ash layer can travel around the globe, and then also is deposited in Antarctic ice cores.Ice core records can be used to reconstruct temperature, atmospheric circulation strength, precipitation, ocean volume, atmospheric dust, volcanic eruptions, solar variability, marine biological productivity, sea ice and desert extent, and forest fires.
Layers of ice accumulate over seasons and years, creating a record of the climate conditions at the time of formation, including snow accumulation, local temperature, the chemical composition of the atmosphere including greenhouse gas concentrations, volcanic activity, and solar activity.
While there I had the opportunity to talk to a team of scientists who were loading supplies in order to head back out onto the cap. They said that they were working in an area where the ice was about 9,000 ft. I mentioned that I was amazed that the ice went up that far.