In addition to the vertical fluxes, Vargas explained that is also important to account for lateral fluxes in salt marshes, as well. (sciencedaily.com)
The ratio ɛ = H / L between vertical extent H of the lower troposphere and the horizontal scale L of the region of precipitation (Fig. 1) enters because of the balance of the horizontal advective heat transport and the vertical fluxes of net radiative influx R and precipitation P. (pnas.org)
We try to develop theories (closure schemes) for the vertical fluxes by unresolved eddies, but that's hard and success is limited. (gfdl.noaa.gov)