source: trunk/INPUT/YROSIAE/source_3.20/bio.param @ 4

#
# bio.param
#
# Parameter file for sea ice biogeochemistry ISPOL, source v3.20
#
# (c) Martin, Dec 2015, Paris
#
#=================================================================================
#
#---------------------------------------------------------------------------------
# Type of model and fluxes
#---------------------------------------------------------------------------------
#
# c_grid      : type of grid: multilayer 'ML', deformed three layer 'DL', skeletal 'SL', or biologically-active 'BA'
ML
# h_skel      : prescribed biologically active layers thickness (SL & DL)
0.10
# e_thr_bal   : prescribed permeability threshold for BAL
0.05
#
#---------------------------------------------------------------------------------
# Process switches
#---------------------------------------------------------------------------------
#
# ln_trbo     : bottom entrapment for tracers or not
.TRUE.
# ln_trsi     : snow-ice entrapment for tracers or not
.TRUE.
# ln_trdiff   : diffusion of tracers or not
.TRUE.
# ln_trremp   : remapping of tracers or not
.TRUE.
# ln_lim_dsi  : limitation of growth by DSi or not
.TRUE.
# ln_lim_no3  : limitation of growth by NO3
.TRUE.
# ln_lim_po4  : limitation of growth by PO3
.TRUE.
# ln_lim_lig  : light limitation or not
.TRUE.
# ln_lim_tem  : temperature inhibition or not
.TRUE.
# ln_lim_sal  : brine salinity inhibition or not
.TRUE.
# ln_lys      : lysis or not
.TRUE. 
# ln_rem      : remineralization or not
.TRUE. 
# ln_syn      : diatom synthesis or not
.TRUE. 
# ln_bubform  : gas buble formation
.TRUE. 
# ln_bubrise  : gas buble ascent
.TRUE. 
# ln_gasflux  : gas flux to ATM
.TRUE. 
# ln_carbon   : activate carbon cycle
.TRUE.
# ln_ikaite   : activate CaCO3 precipitation
.TRUE.
#
#---------------------------------------------------------------------------------
# Gas exchange / carbonate system / ikaite 
#---------------------------------------------------------------------------------
#
# i_gas_flux      : Type of gas flux (1=Noflux, 2=ice-atm diffusive flux)
2
# brines_ar       : Brines aspect ratio (vertical ellipsoid: <1; spheres: 1)
1.00
# bub_form_rate   : Gas Bubble formation rate (s-1) 2.5e-7
2.5e-7 
# bub_diss_rate   : Gas Bubble dissolution rate (s-1)  2.5e-3
2.5e-3 
# h_bl_gas        : Boundary layer thickness for diffusive gas flux (Moreau et al. 2005)
0.5e-6
# e_thr_gasflux   : Brine volume fraction threshold for gas fluxes
0.05
# e_thr_bubrise   : Brine volume fraction thershold for bubble rise
0.10
# sursat_gas      : Sursaturation tolerated in brines (1 = 100%)
1.00
 # nn_carbonate   : 1=Roy; 2=Mehrbach equilibration CO2 constants; Mehrbach (2) is default
2
 # caco3_time     : CaCO3 precipitation/dissolution time scale rate (360000s=100h by default)
360000.
#
#---------------------------------------------------------------------------------
# Physiological parameters
#---------------------------------------------------------------------------------
#
# nn_bio_opt  : type of biological model (0=NP; 1=NPD Redfield; 2=NPD + Si; 3=NPD non-RedF; 4=NPD n.r + iron, 5=carbon cycle & gases)
5
#--- Bio-optical parameters
#
# astar_alg   : specific attenuation coefficient ( m-1 / ( mg chla m-3 ) ) - 0.01 Tedesco
0.005
# fdet_alg    : fraction of detrital radiation absorption versus algal absorption - 0.2 (Arrigo et al 1993)
0.2
#
#--- Growth, loss, remineralization
#
# pp_presc    : prescribed GPP (ln_syn = false, mmol C m-3 s-1 ) DEFLT 1.0e-5
0.0e-5       
# mumax_bio   : maximum specific growth rate (s-1) ( Sarthou 5e-6 -> 3.8e-5 )
1.00e-5
# klys_bio    : loss rate (s-1) ( Sarthou  5.8e-8 -> 2.75e-6 )
1.00e-6
# krsp_bio    : respiration rate (s-1) 
1.0e-6
# krem_bio    : remineralization rate for carbon (2.0e-7 Moreau et al Elementa Oxy 2015)
5.0e-6
# frem_bio    : Fraction of nutrient loss that is remineralized in case of an N-P formulation
1.00
#
#--- Photosynthesis / light limitation
#
# nn_phs      : type of photosynthesis parameterization (1-4)
4
# ek_bio      : Light adaptation parameter (nn_phs = 1, muE m-2 s-1) - DEFLT 2
2
# alpha_bio   : Photosynthetic efficiency (nn_phs > 1, gC/gchla/s/(muE/m2/s)) DEFLT 1.8e-4 - Fragiliariopsis 5.56e-5 (Mar FM)
2.50e-5
# chla_c      : Chl/C in ice algae (g/g) - DEFLT 0.05 - Loern 95 0.003 - 0.05 (applies only for nn_phs = 1-3)
0.05
# Estar       : PAR value at which Chl/C=min (nn_phs = 4) 360.
40. 
# nn_lys      : type of lysis [ 1: klys_bio prescribed; 2: klys_bio*exp(rg_bio*T) ]
2
# nn_rem      : type of remineralization [1: krem_bio prescribed; 2: krem_bio*exp(rg_bac*T) ]
2
#
#--- Redfield ratios
#
# si_c        : silicon to carbon molar ratio in diatoms (mol/mol) - 0.11 Sarthou 2005
0.11
# no3_c       : nitrogen to carbon molar ratio in diatoms (mol/mol) - 0.14 Sarthou 2005; Redf - 0.151
0.14
# po4_c       : phosphorus to carbon molar ratio in diatoms (mol/mol) - 0.014 Sarthou 2005; 0.0094
0.014
# oxy_c       : oxygen release to carbon uptake ratio during photosynthesis (mol/mol) - Redf = 138/106 = 1.30 / Sarmiento Gruber 2006 150/106 = 1.41, Anderson et al
1.30 
#
#--- Nutrient limitation, temperature and salinity inhibition
#
# khs_si_bio  : halfsat cst for Si uptake (micrmol m-3) - 3.9 Sarthou et al
3.9
# khs_n_bio   : halfsat cst for N uptake (micrmol m-3)  - 1.6 Sarthou et al
1.6
# khs_p_bio   : halfsat cst for P uptake (micrmol m-3)  - 0.24 Sarthou et al.
0.24
# rg_bio      : Temperature coefficient for algal physiological processes (0.0633 degC-1; Eppley, 1972)
0.0633
# rg_bac      : Temperature coefficient for bacterial respiration (0.41 degC-1; Moreau et al, Elementa 2015)
0.41
# nn_lim_sal  : Salinity lim. 1=Power-log gaussian, Arrigo 93 data; 2=Gaussian
1
# lim_sal_wid : Width of the limitation function (nn_lim_sal=2)
20.0
# lim_sal_smax: Salinity where limitation function equals 1 (nn_lim_sal=2)
34.0