Hi,
My query is related to the simulation of multiple land units within a grid cell, since each land unit is simulated independently. I am using the sub-model CLM5-Fruittree which simulates fruit orchards. The main focus of my case study is the energy fluxes of a vineyard orchard. The site also consists of vegetation (C3 grass) within the rows of the vineyard.
I performed a sensitivity analysis by assigning land unit fractions of PCT_NATVEG = 80% and PCT_CROP = 20%. The results are good in terms of capturing the dynamics of energy fluxes. The second sensitivity simulation assumes CROP = 100%, which is heavily underestimated compared to the measured data. If I understand the following lines correctly, this is based on the CLM5-Fruittree model description:
"The sub-model development does not include any changes to the existing calculation schemes for radiative transfer or momentum, heat, and water fluxes to explicitly account for the discontinuous canopy structure of tree rows and vegetated or non-vegetated alleys in fruit orchards. In-row and between-row planting distances and alley vegetation are not defined directly. Instead, the orchard structure and the area covered by the canopy are accounted for through parameterization of the leaf and stem area indices, the planting density, maximum canopy height, and aerodynamic parameters, similar to the implementation of crops and forest in CLM5".
So, my question is whether my approach of using land unit fractions is appropriate, or whether it could bias the results by including a NATVEG land unit together with the CROP land unit, considering that orchards are already simulated based on the parameters mentioned above. Your insight would be highly appreciated, thank you in advance.
Regards,
My query is related to the simulation of multiple land units within a grid cell, since each land unit is simulated independently. I am using the sub-model CLM5-Fruittree which simulates fruit orchards. The main focus of my case study is the energy fluxes of a vineyard orchard. The site also consists of vegetation (C3 grass) within the rows of the vineyard.
I performed a sensitivity analysis by assigning land unit fractions of PCT_NATVEG = 80% and PCT_CROP = 20%. The results are good in terms of capturing the dynamics of energy fluxes. The second sensitivity simulation assumes CROP = 100%, which is heavily underestimated compared to the measured data. If I understand the following lines correctly, this is based on the CLM5-Fruittree model description:
"The sub-model development does not include any changes to the existing calculation schemes for radiative transfer or momentum, heat, and water fluxes to explicitly account for the discontinuous canopy structure of tree rows and vegetated or non-vegetated alleys in fruit orchards. In-row and between-row planting distances and alley vegetation are not defined directly. Instead, the orchard structure and the area covered by the canopy are accounted for through parameterization of the leaf and stem area indices, the planting density, maximum canopy height, and aerodynamic parameters, similar to the implementation of crops and forest in CLM5".
So, my question is whether my approach of using land unit fractions is appropriate, or whether it could bias the results by including a NATVEG land unit together with the CROP land unit, considering that orchards are already simulated based on the parameters mentioned above. Your insight would be highly appreciated, thank you in advance.
Regards,
