Earth is able to regulate and stabilize its own temperature across vast timescales – 100,000 years or so on average – even after dramatic shifts in climate caused by ice ages, solar radiation shifts, and intense volcanic activity, new research suggests.
This 'stabilizing feedback' is part of the reason Earth has managed to keep life going for the past 3.7 billion years or so, the team behind the new research says. This feedback has beenTo find that evidence, researchers dug deep into existing paleoclimate data collected over the last 66 million years, applying mathematical modeling to determine whether swings in Earth's average temperatures might be limited by one or more factors.
Higher rates of carbon dioxide entering the atmosphere ramp up weathering activity, increasing the amount of exposed silicates that in turn remove more of the greenhouse gas from the atmosphere, limiting future weathering. "To some extent, it's like your car is speeding down the street, and when you put on the brakes, you slide for a long time before you stop,""There's a timescale over which frictional resistance, or a stabilizing feedback, kicks in, when the system returns to a steady state."
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