!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
! General namelist for PISCES model
! -------------
!>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
!
!-----------------------------------------------------------------------
!   natext   air-sea exchange
!-----------------------------------------------------------------------
!   atcco2 : atmospheric pCO2
!
&natext
   atcco2 = 278.,
/
!-----------------------------------------------------------------------
!   natbio   biological parameters
!-----------------------------------------------------------------------
!  part        part of calcite not dissolved in guts
!  nrdttrc     time step frequency for biology
!  wsbio       POC sinking speed
!  xkmort      half saturation constant for mortality
!  ferat3      Fe/C in zooplankton
!  wsbio2      Big particles sinking speed
!
&natbio
   part       =  0.85,
   nrdttrc    =  4,
   wsbio      =  2. ,
   xkmort     =  1.E-7 ,
   ferat3     =  3.E-6,
   wsbio2     =  50.,
/
!-----------------------------------------------------------------------
!   natlim   parameters for nutrient limitations
!-----------------------------------------------------------------------
!  conc0       Phosphate half saturation
!  conc1       Phosphate half saturation for diatoms
!  conc2       Iron half saturation for phyto
!  conc3       Iron half saturation for diatoms
!  concnnh4    NH4 half saturation for phyto
!  concdnh4    NH4 half saturation for diatoms
!  xksi1       half saturation constant for Si uptake
!  xksi2       half saturation constant for Si/C
!  xkdoc       half-saturation constant of DOC remineralization
!  caco3r      mean rain ratio
&natlim
   conc0      =  2.e-6,
   conc1      =  10E-6 ,
   conc2      =  0.02E-9 ,
   conc2m     =  0.08E-9,
   conc3      =  0.1E-9 ,
   conc3m     =  0.4E-9,
   concnnh4   =  1.E-7,
   concdnh4   =  5.E-7,
   xksi1      =  2.E-6 ,
   xksi2      =  3.33E-6 ,
   xkdoc      =  417.E-6 ,
   caco3r     =  0.3,
/
!-----------------------------------------------------------------------
!   natprod   parameters for phytoplankton growth
!-----------------------------------------------------------------------
!  pislope     P-I slope
!  pislope2    P-I slope  for diatoms
!  excret      excretion ratio of phytoplankton
!  excret2     excretion ratio of diatoms
!  chlcnm      Minimum Chl/C in nanophytoplankton
!  chlcdm      Minimum Chl/C in diatoms
!  fecnm       Maximum Fe/C in nanophytoplankton
!  fecdm       Minimum Fe/C in diatoms
!  grosip      mean Si/C ratio
&natprod
   pislope    =  4. ,
   pislope2   =  4. ,
   excret     =  0.05 ,
   excret2    =  0.05 ,
   chlcnm     =  0.033,
   chlcdm     =  0.05,
   fecnm      =  10E-6,
   fecdm      =  15E-6,
   grosip     =  0.151,
/
!-----------------------------------------------------------------------
!   natmort   parameters for phytoplankton sinks
!-----------------------------------------------------------------------
!  wchl        quadratic mortality of phytoplankton
!  wchld       maximum quadratic mortality of diatoms
!  mprat       phytoplankton mortality rate
!  mprat2      Diatoms mortality rate
!  mpratm      Phytoplankton minimum mortality rate
&natmort
   wchl       =  0.001,
   wchld      =  0.02,
   mprat      =  0.01,
   mprat2     =  0.01,
   mpratm     =  0.01,
/
!-----------------------------------------------------------------------
!   natmes   parameters for mesozooplankton
!-----------------------------------------------------------------------
!  grazrat2    maximal mesozoo grazing rate
!  resrat2     exsudation rate of mesozooplankton
!  mzrat2      mesozooplankton mortality rate
!  xprefc      zoo preference for phyto
!  xprefp      zoo preference for POC
!  xprefz      zoo preference for zoo
!  xprefpoc    zoo preference for poc
!  xkgraz2     half sturation constant for meso grazing
!  epsher2     Efficicency of Mesozoo growth
!  sigma2      Fraction of mesozoo excretion as DOM
!  unass2      non assimilated fraction of P by mesozoo
!  grazflux    flux-feeding rate
&natmes
   grazrat2   =  0.7,
   resrat2    =  0.005,
   mzrat2     =  0.03,
   xprefc     =  1. ,
   xprefp     =  0.2 ,
   xprefz     =  1 ,
   xprefpoc   =  0.2 ,
   xkgraz2    =  20.E-6 ,
   epsher2    =  0.33 ,
   sigma2     =  0.6,
   unass2     =  0.3 ,
   grazflux   =  5.e3,
/
!-----------------------------------------------------------------------
!   natbio   biological parameters
!-----------------------------------------------------------------------
!  grazrat     maximal zoo grazing rate
!  resrat      exsudation rate of zooplankton
!  mzrat       zooplankton mortality rate
!  xpref2c      Microzoo preference for POM
!  xpref2p      Microzoo preference for Nanophyto
!  xpref2d      Microzoo preference for Diatoms
!  xkgraz      half sturation constant for grazing
!  epsher      Efficiency of microzoo growth
!  sigma1      Fraction of microzoo excretion as DOM
!  unass       non assimilated fraction of phyto by zoo
&natzoo
   grazrat    =  4.0,
   resrat     =  0.03,
   mzrat      =  0.0,
   xpref2c    =  0.0 ,
   xpref2p    =  0.5 ,
   xpref2d    =  0.5 ,
   xkgraz     =  20.E-6 ,
   epsher     =  0.33 ,
   sigma1     =  0.6,
   unass      =  0.3 ,
/
!
!-----------------------------------------------------------------------
!   natrem   parameters for remineralization
!-----------------------------------------------------------------------
!  xremik      remineralization rate of DOC
!  xremip      remineralisation rate of POC
!  nitrif      NH4 nitrification rate
!  xsirem      remineralization rate of Si
!  xlam1       scavenging rate of Iron
!  oxymin      Half-saturation constant for anoxia
&natrem
   xremik    =  0.3,
   xremip    =  0.025,
   nitrif    =  0.05,
   xsirem    =  0.015,
   xlam1     =  0.005,
   oxymin    =  1.E-6,
/
!-----------------------------------------------------------------------
!   natcal   Calcite chemistry
!-----------------------------------------------------------------------
!  kdca        calcite dissolution rate constant (1/time)
!  nca         order of dissolution reaction (dimensionless)
&natcal
   kdca       =  0.327e3,
   nca        =  1.,
/
!-----------------------------------------------------------------------
!   natsms   inputs deposition
!-----------------------------------------------------------------------
!   bdustfer    boolean for dust input from the atmosphere
!   briver      boolean for river input of nutrients
!   bndepo      boolean for atmospheric deposition of N
!   bsedinput   boolean for Fe input from sediments
!   sedfeinput  Coastal release of Iron
!
&natsms
   bdustfer   =  .true.,
   briver     =  .false.,
   bndepo     =  .false.,
   bsedinput  =  .false.,
   sedfeinput =  1E-9,
   dustsolub  =  0.014,
/
!---------------------------------------------------------------------------------
!   natkrpar   parameter for Kriest parameterization      (#ifdef key_kriest)
!---------------------------------------------------------------------------------
!  xkr_eta       Sinking  exponent
!  xkr_zeta      N content exponent
!  xkr_mass_min  Minimum mass for Aggregates
!  xkr_mass_max  Maximum mass for Aggregates
!
&natkrpar
   xkr_eta      = 1.17,
   xkr_zeta     = 2.28,
   xkr_mass_min = 0.0002,
   xkr_mass_max = 1.,
/
!---------------------------------------------------------------------------------
!   natkrsize   size calsses for Kriest parameterization      (#ifdef key_kriest)
!---------------------------------------------------------------------------------
!  xkr_sfact     Sinking factor
!  xkr_stick     Stickiness
!  xkr_xnnano    Nbr of cell in nano size class
!  xkr_ndiat     Nbr of cell in diatoms size class
!  xkr_nmeso     Nbr of cell in mesozoo size class
!  xkr_naggr     Nbr of cell in aggregates  size class
!
&natkrsize
   xkr_sfact    = 942.,
   xkr_stick    = 0.5,
   xkr_nnano    = 2.337,
   xkr_ndiat    = 3.718,
   xkr_nmeso    = 7.147,
   xkr_naggr    = 9.877,
/