search

NGEET / fates

repository for the Functionally Assembled Terrestrial Ecosystem Simulator (FATES)
Other
105 stars 92 forks source link

Maintenance respiration Q10 for C4 grasses (Ryan 1991) #1127

Closed mpaiao closed 11 months ago

mpaiao commented 11 months ago

I was just checking the Ryan (1991) leaf maintenance respiration subroutine, and I noticed that the reference value at 25°C is calculated from the original reference at 20°C using a Q10 = 1.5

https://github.com/NGEET/fates/blob/5551a70019013c2e73f63c09f3afd786d8151908/biogeophys/FatesPlantRespPhotosynthMod.F90#L2105-L2106

However, when the respiration is calculated for C4 grasses, the actual Q10 used is 2.0:

https://github.com/NGEET/fates/blob/5551a70019013c2e73f63c09f3afd786d8151908/biogeophys/FatesPlantRespPhotosynthMod.F90#L2121-L2123

Perhaps we would want to use the same value in both cases? I have the impression this is making the reference respiration to be less than intended for C4 grasses...

glemieux commented 11 months ago

Consensus is to continue to discuss this and come back to it later.