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The integration at the canopy level is done over nlai=20 fixed levels $l$.

nlai is a local constant of the diffuco module.

laimax is a local constant of the diffuco\_trans\_co2 subroutine independent of the PFT equal to 12. 

\begin{equation}
{{{LAI}}(l)={{lai}}{max}\frac{e^{{0{.}{15}\cdot (l-1)}}-1}{e^{{0{.}{15}\cdot {{nlai}}}}-1}}\nonumber
\end{equation}
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