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Science Magazine ➨ Earth’s ice ages are typically thought of as seemingly unending periods of bitter cold. But a new study suggests bursts of carbon dioxide (CO2) often entered the atmosphere during these times, providing decades or even centuries of relative warmth amid 10,000-year stretches of chill. 


 Sid Perkins

Researchers can track fluctuations in atmospheric CO2 by looking at ice cores drilled in Antarctica, Greenland, and some tall mountains in lower latitudes. The cores contain trapped air bubbles as fluffy snow was compressed into ice by the weight of newer, fresher overlying layers.

Some of these climate chronicles go back hundreds of thousands of years. But high-resolution data, tracking centennial-scale or shorter variations, have been lacking, in part because of contamination from techniques used to extract CO2 from the ice.

Continue reading @ Science Magazine. 

Surprising Pulses Of Ancient Warming Found In Antarctic Ice Samples

Science Magazine ➨ Earth’s ice ages are typically thought of as seemingly unending periods of bitter cold. But a new study suggests bursts of carbon dioxide (CO2) often entered the atmosphere during these times, providing decades or even centuries of relative warmth amid 10,000-year stretches of chill. 


 Sid Perkins

Researchers can track fluctuations in atmospheric CO2 by looking at ice cores drilled in Antarctica, Greenland, and some tall mountains in lower latitudes. The cores contain trapped air bubbles as fluffy snow was compressed into ice by the weight of newer, fresher overlying layers.

Some of these climate chronicles go back hundreds of thousands of years. But high-resolution data, tracking centennial-scale or shorter variations, have been lacking, in part because of contamination from techniques used to extract CO2 from the ice.

Continue reading @ Science Magazine. 

Climate change

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