Difference between revisions of "npzd Powell.in"

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(New page: <div class="title">Powel NPZD Biological Model Input Script - <span class="red">npzd_Powell.in</span></div> The <span class="red">npzd_Powell.in</span> file sets the parameters for the ''...)   (change visibility)
 
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<div class="title">Powel NPZD Biological Model Input Script - <span class="red">npzd_Powell.in</span></div>
 
<div class="title">Powel NPZD Biological Model Input Script - <span class="red">npzd_Powell.in</span></div>
  
The <span class="red">npzd_Powell.in</span> file sets the parameters for the '''Powell et al. NPZD''' model. The name of this file is set by the <span class="blue">BPARNAM</span> keyword in the [[ocean.in]] file. A default <span class="red">npzd_Powell.in</span> standard input ASCII file can be found in the '''User/External''' subdirectory of the ROMS source code. In order to include the '''Powell et al. NPZD''' model in ROMS you must set <span class="blue">BPARNAM</span> correctly and activate the [[NPZD_POWELL]] [[Options|CPP option]].
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The <span class="red">npzd_Powell.in</span> file sets the parameters for the '''Powell et al. NPZD''' model. The name of this file is set by the [[Variables#bparnam|BPARNAM]] keyword in the [[ocean.in]] file. A default <span class="red">npzd_Powell.in</span> standard input ASCII file can be found in the '''User/External''' subdirectory of the ROMS source code. In order to include the '''Powell et al. NPZD''' model in ROMS you must set [[Variables#bparnam|BPARNAM]] correctly and activate the [[NPZD_POWELL]] [[Options|CPP option]].
  
  

Revision as of 15:39, 20 May 2008

Powel NPZD Biological Model Input Script - npzd_Powell.in

The npzd_Powell.in file sets the parameters for the Powell et al. NPZD model. The name of this file is set by the BPARNAM keyword in the ocean.in file. A default npzd_Powell.in standard input ASCII file can be found in the User/External subdirectory of the ROMS source code. In order to include the Powell et al. NPZD model in ROMS you must set BPARNAM correctly and activate the NPZD_POWELL CPP option.


Note Notice: Detailed information about ROMS input script file syntax can be found here.


Biological Model Parameters

Input parameter units are specified within brackets ([ ])and default values are specified within braces ({ }).

  • This switch to control the computation of npzd_Franks within nested and/or multiple connected grids. By default this switch is set to TRUE in mod_scalars.F for all grids. Ngrids values are expected. The user has the option, for example, to compute the biology in just one of the nested grids. If so, this switch needs to be consistent with the dimension parameter NBT in mod_param.F. In order to make the model more efficient in memory usage, NBT(:) should be zero in such grids.
Lbiology == T
  • Maximum number of iterations to achieve convergence of the nonlinear solution.
BioIter == 1
  • Initial concentration for analytical uniform initial conditions, [millimole/m3]. It is only used when ANA_BIOLOGY is activated.
BioIni(iNO3_) == 17.0d0  ! nitrate
BioIni(iPhyt) == 1.0d0  ! phytoplankton
BioIni(iZoop) == 1.0d0  ! zooplankton
BioIni(iSDet) == 1.0d0  ! detritus
  • Fraction of shortwave radiation that is photosynthetically active, [nondimensional], {0.43d0}.
PARfrac == 0.43d0
  • Light attenuation due to seawater, [1/m], {0.067d0}.
AttSW == 0.04d0
  • Light attenuation due to phytoplankton, self-shading coefficient, [m2/millimole_N], {0.0095d0}.
AttPhy == 0.0095d0
  • Phytoplankton, initial slope of P-I curve [m2/W], {0.025d0}.
PhyIS == 0.025d0
  • Nitrate uptake rate, [1/day], {1.5d0}.
Vm_NO3 == 1.5d0
  • Phytoplankton mortality rate to Detritus pool, [1/day], {0.1d0}.
PhyMRD == 0.01d0
  • Phytoplankton mortality rate to Nitrogen pool, [1/day], {0.0d0}.
PhyMRN == 0.0d0
  • Half-saturation for phytoplankton nitrate uptake [millimole_N m-3], {2.0d0}.
K_NO3 == 2.0d0
  • Ivlev constant for zooplankton grazing parameterization [Nondimensional], {0.06d0}
Ivlev == 0.06d0
  • Zooplankton grazing rate, [1/day], {0.52}.
ZooGR == 0.52d0
  • Zooplankton excretion efficiency to Detritus pool [nondimensional], {0.3d0}
ZooEED == 0.0d0
  • Zooplankton excretion efficiency to Nitrogen pool [nondimensional], {0.3d0}
ZooEEN == 0.3d0
  • Zooplankton mortality rate to Detritus pool, [1/day], {0.0d0}.
ZooMRD == 0.145d0
  • Zooplankton mortality rate to Nitrogen pool, [1/day], {0.145d0}.
ZooMRN == 0.0d0
  • Detritus remineralization rate, [1/day], {0.1d0}.
DetRR == 0.1d0
  • Vertical sinking velocity for phytoplankton [m/day], {0.0d0}.
wPhy == 0.0d0
  • Detrital sinking rate, [m/day], {8.0d0}.
wDet == 5.0d0
  • Lateral, constant, harmonic/biharmonic horizontal diffusion of biological tracer: [1:NBT,Ngrids] values expected.
TNU2 == 4*0.0d0  ! m2/s
TNU4 == 4*0.0d0  ! m4/s
  • Vertical mixing coefficients for biological tracers: [1:NBT,Ngrids] values expected.
AKT_BAK == 4*5.0d-6  ! m2/s
  • Nudging/relaxation time scales, inverse scales will be computed internally: [1:NBT,Ngrids] values expected.
TNUDG == 4*0.0d0  ! days
  • Logical switches to activate writing of biological tracers into history output file: [1:NBT,Ngrids] values expected.
Hout(idTvar) == 4*T  ! biological tracer
Hout(idTsur) == 4*F  ! surface tracer flux