Wl: Liquid Water Path [kg m-2]
rho_a: density of air
wl: liquid water mixing ratio
\begin{align*}
W_l=\int_{z_b}^{z_t} \rho_a w_l dz
\end{align*}
数式の変換 → https://texclip.marutank.net/
Curry and Webster (p.218)
Ref
Curry and Webster, Thermodynamics of Atmospheres and Oceans, Academic Press.