Earth wouldn’t have ice caps without eroding rocks and quiet volcanoes

image via New Scientist

February 14, 2025, 7:00 PM

• •Ice caps are rare on Earth, but a new model suggests that they form when rock erosion removes carbon dioxide from the atmosphere and volcanic activity is low.
• •The model is based on the past 420 million years of Earth’s climate.
• •The model suggests that the Earth’s climate is currently in an ice house state.

A new model of Earth's climate over the past 420 million years suggests that ice caps form when there is rapid rock erosion removing carbon dioxide from the atmosphere and less CO2-releasing volcanic activity.

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