stineb
commented
3 years ago The dependency of Jmax on Vcmax is accounted for in the P-model here through assuming the coordination hypothesis. In this sense, the formulation in Table 1 pasted in above should be regarded as an apparent empirical relationship (against which the P-model-predicted Vcmax25 and Jmax25 can be tested. In other words, for what we're doing here, the scaling applied here should be correct.
I think you convert to jmax25, basing on modified Arrhenius kinetics from Kattge & Knorr (2007).
However, see Smith and Keenan 2020 GCB - table 1 - first line Kattge & Knorr (2007). K25 is not 1, but depended on temperature and vcmax25. If strictly follow their design, then k25 should be updated in our version. Now we assumed jmax25 = jmax / ftemp_inst_jmax, which means k25 still equals to 1.
