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Ancient climate changes caused by rising CO2

A new report in the journal Science suggests that a “global pattern” of climate change began 2.7 million years ago as CO2 levels rose.

Researchers found that, at this point, temperature patterns in the tropics slipped into step with patterns of Ice Ages in the Northern Hemisphere.

They report in the journal Science that atmospheric CO2 could be the “missing link” to explain this global pattern.

The findings, they say, reveal a “feedback process” that could have been magnified by greenhouse gases

This loop of feedback could have intensified both the Ice Ages in the Northern Hemisphere, and temperature fluctuations in the tropics.

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