CLM Harvest problem

[jinmuluo]

Hi,

I'm wondering if anyone working with the crop model, I would appreciate it if anyone could give me some suggestions. The question is when I outputted the "CROPPROD1N_LOSS" in column level, it looked like in agricultural land where "clunit" == 2.0 didn't have any values. But "CROPPROD1N_LOSS" variable has values in natural land where "clunit" == 1.0, but the global summation of "CROPPROD1N_LOSS" over the natural land in column level is smaller than the number from grid cell level. So, I guess I have three questions:
(1) Does it make sense to output "CROPPROD1N_LOSS" in column level, then sum over the certain type of land unit?
(2) Why "CROPPROD1N_LOSS" only have values over the natural land (clunit == 1.0), not the crop land?
(3) Why the global summation of the "CROPPROD1N_LOSS" in column level is smaller than the number from global summation over the grid cell level?

Best,

Jinmu

 

[slevis]

I have checked this variable in the code and have found that we send only the gridcell-level variable to history (in CNProductsMod.F90). This may explain the strange behavior that you described.

I have also seen a patch-level version of this variable in the code. You may be able to add that to history if you're interested in looking at subgrid output.

 

[jinmuluo]

I have checked this variable in the code and have found that we send only the gridcell-level variable to history (in CNProductsMod.F90). This may explain the strange behavior that you described.

I have also seen a patch-level version of this variable in the code. You may be able to add that to history if you're interested in looking at subgrid output.

Hi Sam,

Thank you for your explanations! Do you think "CROPPROD1N_LOSS" represents the total N removed from the pool through the product? Or is there any other crop product loss N fluxes I didn't notice before? Thank you.

Best,

Jinmu

 

[slevis]

Yes, I think it's the total, though I have not looked carefully.