辐射强迫计算器
使用辐射强迫计算器估算温室气体浓度变化引起的能量收支不平衡。输入CO₂和其他温室气体浓度，计算辐射强迫值W/m²，理解气候变化的物理驱动力。
Radiative Forcing
2.169 W/m²
Radiative Forcing vs Initial CO2 Concentration
公式
Radiative Forcing from CO2
Radiative forcing measures the change in energy balance at the top of the atmosphere caused by a change in CO2 concentration.
Formula
Delta F = 5.35 x ln(C / C0) W/m²
Where C is the new concentration and C0 is the reference (pre-industrial) concentration. The natural logarithm reflects the diminishing absorption effect as CO2 levels rise.
计算示例
CO2 has risen from 280 ppm (pre-industrial) to 420 ppm (current).
- 01Ratio = 420 / 280 = 1.5
- 02ln(1.5) = 0.4055
- 03Delta F = 5.35 x 0.4055 = 2.169 W/m²
常见问题
What is radiative forcing?
Radiative forcing is the difference between incoming solar energy absorbed by the Earth and energy radiated back to space, measured in watts per square meter.
Why is the relationship logarithmic?
As CO2 increases, the absorption bands become saturated. Each additional molecule of CO2 has a slightly smaller warming effect, producing a logarithmic curve.
What does 2 W/m² mean in practical terms?
A forcing of 2 W/m² roughly corresponds to about 1.5 degrees Celsius of eventual warming once the climate reaches equilibrium.