Climate Sensitivity

Forcing, feedbacks and warming

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• CO₂ forcing $\Delta F \approx 5.35 \ln(C/C_0)$: logarithmic.
• Equilibrium warming $\Delta T = \lambda \Delta F$, about 3 °C per doubling.
• Feedbacks (ice, water vapour, clouds) roughly triple the direct effect.

Steps

1. Radiative forcing
2. Forcing from a doubling
3. The 1.5 °C level
4. Ice-albedo feedback
5. The rest of the doubling
6. Without feedbacks