​

Testing whether narrower leaf layers at the top of the canopy reduce the FATES high albedo bias.

​

​

fates_vai_top_bin_width

- smaller values = thinner leaf layers at the top of the canopy

​

fates_vai_width_increase_factor - smaller values = a more gradual increase in leaf layer thickness through the canopy

​

​

Five year runs in SP mode

nlevleaf = 75

​

https://portal.nersc.gov/cfs/e3sm/jneedham/_build_fates_fraction/

​

​

• Effects are small

​

• Overall score best for top = 0.05 or 0.1 and increase 1.05 or 1.1

​

• Most efficient parameterisation would be top = 0.1, increase 1.1 with nlevleaf = 36

Default

fates_vai_top_bin_width = 0.1

fates_vai_width_increase_factor = 1.1

34.18 simulated_years/day

22.51 simulated_years/day

fates_vai_top_bin_width = 1

fates_vai_width_increase_factor = 1