An Antarctic ice core reveals atmospheric CO2 variations over the past few centuries

@article{Raynaud1985AnAI,
  title={An Antarctic ice core reveals atmospheric CO2 variations over the past few centuries},
  author={Dominique Raynaud and J. M. Barnola},
  journal={Nature},
  year={1985},
  volume={315},
  pages={309-311}
}
When snow is transformed into ice (firnification process) by sedimentation near the surface of an ice sheet, some of the atmospheric air is trapped in the inter-grain spaces which are progressively isolated from the surrounding atmosphere. The resulting material is an air-tight bubbly glacial ice. By analysing the air extracted from the bubbles found in the ice, it is possible to determine the air composition and thus its CO2 content for the period during which the air was trapped. We aim here… CONTINUE READING