! BioCGT constants file
! *********************
! properties of constants:
!   name=           code name of constant
!   description=    description including unit, default=""
!   value=          value(s) separated by ";"
!   dependsOn=      whether this constant varies in time and space, default="none", other possible values: "xyz", "xyzt"
!   minval=         minimum value for variation (for inverse modelling)
!   maxval=         maximum value for variation (for inverse modelling)
!   varphase=       phase in which a parameter is allowed to vary (for inverse modelling) (default=1)
!   comment=        comment, e.g. how certain this value is, literature,..., default=""
!   unit=           unit of the constant
! *************************************************************************************
name        = critical_stress
value       = 0.016
description = critical shear stress for sediment erosion [N/m2]
comment     = This is only for erosion of the fluffy layer.\\Values of 0.013-0.026 N/m2 were measured in:\\Christiansen, C, K Edelvang, K Emeis, G Graf, S Jähmlich, J Kozuch, M Laima, et al. \\"Material Transport from the Nearshore to the Basinal Environment in the Southern Baltic \\Sea: I. Processes and Mass Estimates." Journal of Marine Systems 35, no. 3-4 (July 1, 2002): \\133-150. doi:10.1016/S0924-7963(02)00126-4.
***********************
name        = cya0
value       = 0.09e-6
description = seed concentration for diazotroph cyanobacteria [mol/kg]
***********************
name        = din_min_lpp
value       = 1.0e-6
description = DIN half saturation constant for large-cell phytoplankton growth [mol/kg]
***********************
name        = din_min_spp
value       = 1.6e-7
description = DIN half saturation constant for small-cell phytoplankton growth [mol/kg]
***********************
name        = dip_min_cya
value       = 1.0e-8
description = DIP half saturation constant for diazotroph cyanobacteria growth [mol/kg]
***********************
name        = epsilon
value       = 4.5E-17
description = no division by 0
***********************
name        = food_min_zoo
value       = 4.108e-6
description = Ivlev phytoplankton concentration for zooplankton grazing [mol/kg]
***********************
name        = gamma0
value       = 0.027
description = light attentuation parameter (opacity of clear water) [1/m], DO NOT CHANGE NAME gamma0 SINCE THIS NAME WILL BE USED IN THE TEMPLATE
***********************
name        = gamma1
value       = 58.0
description = light attentuation parameter (opacity of POM containing chlorophyll) [m**2/mol]
***********************
name        = gamma2
value       = 53.2
description = light attentuation parameter (opacity of POM detritus) [m**2/mol]
***********************
name        = gamma3
value       = 12.6
description = light attentuation parameter (opacity of DON) [m**2/mol]
***********************
name        = h2s_min_po4_liber
value       = 1.0e-6
description = minimum h2s concentration for liberation of iron phosphate from the sediment [mol/kg]
***********************
name        = ips_threshold
value       = 0.1
description = threshold for increased PO4 burial [mol/m**2]
***********************
name        = ips_cl
value       = 20.25e-3
description = iron phosphate in sediment closure parameter [mol/m2]
***********************
name        = k_h2s_no3
value       = 8.0e5
description = reaction constant h2s oxidation with no3 [kg/mol/day]
***********************
name        = k_h2s_o2
value       = 8.0e5
description = reaction constant h2s oxidation with o2 [kg/mol/day]
***********************
name        = k_sul_no3
value       = 2.0e4
description = reaction constant sul oxidation with no3 [kg/mol/day]
***********************
name        = k_sul_o2
value       = 2.0e4
description = reaction constant sul oxidation with o2 [kg/mol/day]
***********************
name        = light_opt_cya
value       = 50.0
description = optimal light for diazotroph cyanobacteria growth [W/m**2]
***********************
name        = light_opt_lpp
value       = 35.0
description = optimal light for large-cell phytoplankton growth [W/m**2]
***********************
name        = light_opt_spp
value       = 50.0
description = optimal light for small-cell phytoplankton growth [W/m**2]
***********************
name        = lpp0
value       = 0.0045e-6
description = seed concentration for large-cell phytoplankton [mol/kg]
***********************
name        = no3_min_sed_denit
value       = 0.1423e-6
description = nitrate half-saturation concentration for denitrification in the water column [mol/kg]
***********************
name        = no3_min_det_denit
value       = 1.0e-9
description = minimum no3 concentration for recycling of detritus using nitrate (denitrification)
***********************
name        = o2_min_det_resp
value       = 1.0e-6
description = oxygen half-saturation constant for detritus recycling [mol/kg]
***********************
name        = o2_min_nit
value       = 3.75e-6
description = oxygen half-saturation constant for nitrification [mol/kg]
***********************
name        = o2_min_po4_retent
value       = 37.5e-6
description = oxygen half-saturation concentration for retension of phosphate during sediment denitrification [mol/kg]
***********************
name        = o2_min_sed_resp
value       = 64.952e-6
description = oxygen half-saturation constant for recycling of sediment detritus using oxygen [mol/kg]
***********************
name        = patm_co2
value       = 38.0
description = atmospheric partial pressure of CO2 [Pa]
comment     = Schneider et.al.: CO2 partial pressure in Northeast Atlantic and adjacent shelf waters: \\Processes and seasonal variability
***********************
name        = q10_det_rec
value       = 0.15
description = q10 rule factor for recycling [1/K]
***********************
name        = q10_doc_rec
value       = 0.069
description = q10 rule factor for DOC recycling [1/K]
***********************
name        = q10_h2s
value       = 0.0693
description = q10 rule factor for oxidation of h2s and sul [1/K]
***********************
name        = q10_nit
value       = 0.11
description = q10 rule factor for nitrification [1/K]
***********************
name        = q10_sed_rec
value       = 0.175
description = q10 rule factor for detritus recycling in the sediment [1/K]
***********************
name        = r_biores
value       = 0.015
description = bio-resuspension rate [1/day]
***********************
name        = r_cya_assim
value       = 0.75
description = maximum rate for nutrient uptake of diazotroph cyanobacteria [1/day]
***********************
name        = r_cya_resp
value       = 0.01
description = respiration rate of cyanobacteria to ammonium [1/day]
***********************
name        = r_det_rec
value       = 0.003
description = recycling rate (detritus to ammonium) at 0°C [1/day]
***********************
name        = r_ips_burial
value       = 0.0018
description = final burial rate for PO4 [1/day]
***********************
name        = r_ips_ero
value       = 6.0
description = erosion rate for iron PO4 [1/day]
***********************
name        = r_ips_liber
value       = 0.1
description = PO4 liberation rate under anoxic conditions [1/day]
***********************
name        = r_lpp_assim
value       = 1.38
description = maximum rate for nutrient uptake of large-cell phytoplankton [1/day]
***********************
name        = r_lpp_resp
value       = 0.075
description = respiration rate of large phytoplankton to ammonium [1/day]
***********************
name        = r_nh4_nitrif
value       = 0.05
description = nitrification rate at 0°C [1/day]
***********************
name        = r_pp_mort
value       = 0.03
description = mortality rate of phytoplankton [1/day]
***********************
name        = r_cya_mort_diff
value       = 40.0
description = enhanced cya mortality due to strong turbulence
***********************
name        = r_cya_mort_thresh
value       = 0.02
description = diffusivity threshold for enhanced cyano mortality
***********************
name        = r_sed_ero
value       = 6.0
description = maximum sediment detritus erosion rate [1/day]
comment     = On one day, the benthos would be eroded 6 times if there were always erosion.
***********************
name        = r_sed_rec
value       = 0.002
description = maximum recycling rate of sediment to ammonium [1/day]
***********************
name        = r_spp_assim
value       = 0.4
description = maximum rate for nutrient uptake of small-cell phytoplankton [1/day]
***********************
name        = r_spp_resp
value       = 0.0175
description = respiration rate of small phytoplankton to ammonium [1/day]
***********************
name        = r_zoo_graz
value       = 0.5
description = maximum zooplankton grazing rate [1/day]
***********************
name        = r_zoo_mort
value       = 0.03
description = mortality rate of zooplankton [1/day]
***********************
name        = r_zoo_resp
value       = 0.01
description = respiration rate of zooplankton [1/day]
***********************
name        = rfr_c
value       = 6.625
description = redfield ratio C/N
comment     = equals 106/16
***********************
name        = rfr_h
value       = 16.4375
description = redfield ratio H/N
comment     = equals 263/16
***********************
name        = rfr_o
value       = 6.875
description = redfield ratio O/N
comment     = equals 110/16
***********************
name        = rfr_p
value       = 0.0625
description = redfield ratio P/N
comment     = equals 1/16
***********************
name        = rfr_cp
value       = 106.0
description = redfield ratio C/P
comment     = equals 106
***********************
name        = sali_max_cya
value       = 8.0
description = upper salinity limit - diazotroph cyanobacteria [psu]
***********************
name        = sali_min_cya
value       = 4.0
description = lower salinity limit - diazotroph cyanobacteria [psu]
***********************
name        = sed_max
value       = 1.0
description = maximum sediment detritus concentration that feels erosion [mol/m**2]
comment     = in N units
***********************
name        = spp0
value       = 0.0045e-6
description = seed concentration for small-cell phytoplankton [mol/kg]
***********************
name        = temp_min_cya
value       = 13.5
description = lower temperature limit - diazotroph cyanobacteria [°C]
***********************
name        = temp_min_spp
value       = 10
description = lower temperature limit - small-cell phytoplankton [°C]
***********************
name        = temp_opt_zoo
value       = 20
description = optimal temperature for zooplankton grazing [°C]
***********************
name        = w_co2_stf
value       = 4.0
description = piston velocity for co2 surface flux [m/d]
***********************
name        = w_cya
value       = 1.0
description = vertical speed of diazotroph cyanobacteria [m/day]
***********************
name        = w_det
value       = -4.5
description = vertical speed of detritus [m/day]
***********************
name        = w_det_sedi
value       = -2.25
description = sedimentation velocity (negative for downward) [m/day]
comment     = On one day, the lowest 2.25m of suspended detritus are deposited in the sediment. \\(=0.5*w_det)
***********************
name        = w_ipw
value       = -1.0
description = vertical speed of suspended iron PO4 [m/day]
***********************
name        = w_ipw_sedi
value       = -0.5
description = sedimentation velocity for iron PO4 [m/day]
***********************
name        = w_lpp
value       = -0.5
description = vertical speed of large-cell phytoplankton [m/day]
***********************
name        = w_n2_stf
value       = 5.0
description = piston velocity for n2 surface flux [m/d]
***********************
name        = w_o2_stf
value       = 5.0
description = piston velocity for oxygen surface flux [m/d]
***********************
name        = zoo0
value       = 0.0045e-6
description = seed concentration for zooplankton [mol/kg]
***********************
name        = zoo_cl
value       = 0.09e-6
description = zooplankton closure parameter [mol/kg]
***********************
name        = don_fraction
value       = 0.0
description = fraction of DON in respiration products
***********************
name        = r_poc_rec
value       = 0.003
description = recycling rate (poc to dic) at 0°C [1/day]
***********************
name        = r_pocp_rec
value       = 0.002
description = recycling rate (pocp to dic and po4) at 0°C [1/day]
***********************
name        = r_pocn_rec
value       = 0.002
description = recycling rate (pocn to dic and nh4) at 0°C [1/day]
***********************
name        = w_poc
value       = -0.2
description = vertical speed of poc [m/day]
***********************
name        = w_poc_sedi
value       = w_poc/2.0
description = sedimentation velocity (negative for downward) [m/day]
***********************
name        = w_pocp
value       = -0.1
description = vertical speed of pocp [m/day]
***********************
name        = w_pocp_sedi
value       = w_pocp/2.0
description = sedimentation velocity (negative for downward) [m/day]
***********************
name        = w_pocn
value       = -0.1
description = vertical speed of pocn [m/day]
***********************
name        = w_pocn_sedi
value       = w_pocn/2.0
description = sedimentation velocity (negative for downward) [m/day]
***********************
name        = fac_doc_assim
value       = 1.0
description = factor modifying assimilation rate for POC production
***********************
name        = fac_dop_assim
value       = 0.5
description = factor modifying assimilation rate for POCP production
***********************
name        = fac_don_assim
value       = 1.0
description = factor modifying assimilation rate for POCN production
***********************
name        = fac_enh_rec
value       = 10.0
description = enhance recyclig of DON,POCN/DOP,POCP in case of limiting DIN/DIP
***********************
name        = ret_po4_1
value       = 0.15
description = PO4 retension in oxic sediments
***********************
name        = ret_po4_2
value       = 0.50
description = additional PO4 retension in oxic sediments of the Bothnian Sea
***********************
name        = frac_denit_scal
value       = 1.0
description = scaling frac_denit_sed
***********************
name        = reduced_rec
value       = 0.8
description = decrease recycling in sed under anoxia by reduce_rec
***********************
name        = martin_fac_poc
value       = 0.06
description = [1/d], depth dependence of POC sinking speed
comment     = w = martin_fac * z
***********************
name        = r_doc2poc
value       = 0.01
description = POC formation rate
***********************
name        = r_don2pocn
value       = 0.01
description = POCN formation rate
***********************
name        = r_dop2pocp
value       = 0.01
description = POCP formation rate
***********************
name        = r_doc_rec
value       = 0.001
description = recycling rate (doc to dic) at 0°C [1/day]
***********************
name        = r_don_rec
value       = 0.001
description = recycling rate (don to dic and NH4) at 0°C [1/day]
***********************
name        = r_dop_rec
value       = 0.001
description = recycling rate (dop to dic and PO4) at 0°C [1/day]
***********************
