Doubling of the Energy Imbalance
Scientists report that Earth is now taking in more energy from the Sun than it radiates back into space. This energy surplus, known as the planetary energy imbalance, has nearly doubled over the past decades, causing the planet’s surface temperature to rise more rapidly.
Drivers of the Increase
- Higher concentrations of greenhouse gases such as CO₂, CH₄, and N₂O that trap heat in the atmosphere.
- Land‑use changes, for example deforestation, that reduce the Earth’s albedo and increase heat absorption.
- Human‑made aerosols that, while cooling in the short term, are outweighed by greenhouse‑gas effects.
Consequences for the Planet
A stronger energy imbalance leads to more intense heatwaves, more frequent extreme weather events, and accelerated melting of polar ice. These shifts threaten ecosystems and raise the risk of droughts, floods, and crop failures worldwide.
Implications for the Future
The near‑doubling of the energy imbalance signals that global warming is progressing faster than many climate models had predicted. To keep warming below 1.5 °C, emissions would need to be cut drastically—a goal that requires unprecedented global cooperation.