Desaturation of H2 quadrupole lines in the atmospheres of the outer planets

The vibrational dependence of self-broadening of molecular hydrogen lines results in a desaturation of quadrupole absorption lines long thought to be highly saturated in planetary atmospheres. This desaturation significantly alters H2 abundances in the atmospheres of Uranus and Neptune. Baseline models are presented to illustrate the effects of the revision of this fundamental H2 parameter.