6.18. triffid_params.nml

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

6.18.1. 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

If l_trif_crop is FALSE permitted values are 0 and 1. Flag indicating whether the PFT is a crop. Only crop PFTs are allowed to grow in the agricultural area.

0. Not a crop.
1. A crop.

If l_trif_crop is TRUE permitted values are 0, 1 and 2. Flag indicating whether the PFT is natural, crop or pasture. See l_trif_crop for more details.

0. Natural vegetation.
1. Crop.
2. 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.