Clues to climate cycles dug from South Pole snow pit

Particles from the upper atmosphere trapped in a deep pile of Antarctic snow hold clear chemical traces of global meteorological events, climate scientists from France have found. Anomalies in oxygen found in sulfate particles coincide with several episodes of the world-wide disruption of weather known as El Nino and can be distinguished from similar signals left by the eruption of huge volcanoes, the team reports.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/L...