Adiabatic temperature gradient (source code)

= Adiabatic temperature gradient
{title2=$\nabla_{\rm ad}$}

The adiabatic temperature gradient is $\nabla_{\rm ad}=(\partial\log T/\partial\log P)_s$. For a perfect gas with constant adiabatic index, $\nabla_{\rm ad}=(\gamma-1)/\gamma$.