Climate Model Interpreter Calculator

Temperature and radiative forcing from greenhouse gas concentrations using Myhre et al. formulas.

CO2 concentration (ppm)

Pre-industrial CO2 (ppm)

Climate sensitivity (°C/doubling)

CH4 concentration (ppb)

Pre-industrial CH4 (ppb)

N2O concentration (ppb)

Pre-industrial N2O (ppb)

Tab to move between fields

Equilibrium warming (°C)

2.42

Transient warming (°C)1.45

Total radiative forcing (W/m²)3

CO2 forcing (W/m²)2.17

CH4 forcing (W/m²)0.6

N2O forcing (W/m²)0.23

Committed warming remaining (°C)0.97

CO2 × pre-industrial1.5

How to Use This Calculator

Enter current CO₂ concentration (ppm), pre-industrial CO₂ baseline, and equilibrium climate sensitivity (°C/doubling).
Add CH₄ (ppb), N₂O (ppb), and their pre-industrial baselines.
Review Equilibrium Warming (°C), Transient Warming (°C), and Total Radiative Forcing (W/m²).
Compare equilibrium vs. transient warming — the committed warming is often larger than what we currently observe.

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