Page "Global-warming potential" Paragraph 6

Thus, a high GWP correlates with a large infrared absorption and a long atmospheric lifetime.

The dependence of GWP on the wavelength of absorption is more complicated.

Even if a gas absorbs radiation efficiently at a certain wavelength, this may not affect its GWP much if the atmosphere already absorbs most radiation at that wavelength.

A gas has the most effect if it absorbs in a " window " of wavelengths where the atmosphere is fairly transparent.

The dependence of GWP as a function of wavelength has been found empirically and published as a graph.