Why Carbon Dioxide Cools the Upper Atmosphere

Researchers at Columbia University have identified the specific physics behind stratospheric cooling. While carbon dioxide traps heat near the Earth's surface, it acts as a cooling system in the upper atmosphere by emitting infrared energy into space. This process creates a distinct atmospheric fingerprint of human driven climate change. The study highlights a specific range of infrared wavelengths, termed a Goldilocks zone, that drives this cooling. As CO2 levels rise, this zone expands, further cooling the stratosphere and contributing to a feedback loop that traps more heat at the surface.