6.26. triffid_params.nml

This file contains a single namelist called JULES_TRIFFID that sets parameters relevant to the TRIFFID submodel.

6.26.1. JULES_TRIFFID namelist members

This namelist is used to read PFT parameters that are only needed by the dynamic vegetation model (TRIFFID). Values are not used if TRIFFID is not selected.

Note

Where a quantity is said to have units of “/360days”, this means that it is an amount per 360 days.

Note

If the crop model is on (i.e. ncpft > 0), only nnpft = npft - ncpft values will be used for each variable.

JULES_TRIFFID::crop_io
Type:integer(npft)
Permitted:0,1,2
Default:None

Flag indicating whether the PFT is natural, crop, or pasture. Only crop / pasture PFTs are allowed to grow in the agricultural area. See l_trif_crop for more details.

If l_trif_crop is FALSE permitted values of crop_io are 0 and 1.
  1. Natural vegetation (not a crop).
  2. A crop.
If l_trif_crop is TRUE permitted values of crop_io are 0, 1 and 2.
  1. Natural vegetation (neither crop nor pasture).
  2. Crop.
  3. Pasture.
JULES_TRIFFID::g_area_io
Type:real(npft)
Default:None

Disturbance rate (/360days).

JULES_TRIFFID::g_grow_io
Type:real(npft)
Default:None

Rate of leaf growth (/360days).

JULES_TRIFFID::g_root_io
Type:real(npft)
Default:None

Turnover rate for root biomass (/360days).

JULES_TRIFFID::g_wood_io
Type:real(npft)
Default:None

Turnover rate for woody biomass (/360days).

JULES_TRIFFID::lai_max_io
Type:real(npft)
Default:None

Maximum LAI.

JULES_TRIFFID::lai_min_io
Type:real(npft)
Default:None

Minimum LAI.

JULES_TRIFFID::alloc_fast_io
Type:real(npft)
Default:None

Fraction of the carbon flux from vegetation to wood products to add to the rapidly decaying wood products pool (wood_prod_fast).

JULES_TRIFFID::alloc_med_io
Type:real(npft)
Default:None

Fraction of the carbon flux from vegetation to wood products to add to the wood products pool with a moderate decay rate (wood_prod_med).

JULES_TRIFFID::alloc_slow_io
Type:real(npft)
Default:None

Fraction of the carbon flux from vegetation to wood products to add to the slowly decaying wood products pool (wood_prod_slow).

JULES_TRIFFID::retran_l_io
Type:real(npft)
Default:0.5

Fraction of retranslocated leaf N.

JULES_TRIFFID::retran_r_io
Type:real(npft)
Default:0.2

Fraction of retranslocated root N.