Science Modules / Zooplankton
Zooplankton biomass is simulated through the processes of food assimilation and losses from respiration, excretion, egestion, predation and mortality..
Goto Parameter Databaseaed2_zooplankton : Mass balance and functions related to the phytoplankton model
Net zooplankton growth is calculated as a balance between food assimilation and losses from respiration, excretion, egestion, predation and mortality. Food assimilation is calculated as the product of the maximum potential rate of grazing, assimilation efficiency and temperature and food limitation functions. A constant internal nutrient ratio is assumed for simplicity, and since the various input and output fluxes have variable C:N:P ratios, the excretion of nutrients is dynamically adjusted each time-step to maintain this ratio at each time step.
Variable Summary & Setup Options
| Variable Name | Description | Units | Variable Type | Core/Optional |
|---|---|---|---|---|
ZOO_{Group} |
zooplanton group | $$mmol C\,m^{-3}\,day^{-1}$$ | pelagic | core |
| Variable Name | Description | Units | Variable Type | Core/Optional |
|---|---|---|---|---|
ZOO_GRZ |
net zooplankton grazing | $$mmol C\,m^{-3}\,day^{-1}$$ | pelagic diagnostic | core |
ZOO_RESP |
net zooplankton respiration | $$mmol C\,m^{-3}\,day^{-1}$$ | pelagic diagnostic | core |
ZOO_MORT |
net zooplankton mortality | $$mmol C\,m^{-3}\,day^{-1}$$ | pelagic diagnostic | core |
| Parameter Name | Description | Units | Parameter Type | Default | Typical Range | Comment |
|---|---|---|---|---|---|---|
num_zoops |
number of zooplankton groups | - | integer | 0-3 | - | |
the_zoops |
list of ID's of groups in aed_zoo_pars.nml (len=num_phyto) | - | integer | 1/03/2017 | - | |
dX_target_variable |
state variable to provide/receive dissolved OM | - | string | - | - | - |
pX_target_variable |
state variable linked to provided/receive particulate OM | - | string | - | - | - |
An example nml block for the phytoplankton module is shown below.NOTE: Users must supply a valid "aed_zoo_pars.nml" file.
&aed2_zooplankton
num_zoops = 1
the_zoops = 1
dn_target_variable='' ! dissolved nitrogen target variable
pn_target_variable='' ! particulate nitrogen target variable
dp_target_variable='' ! dissolved phosphorus target variable
pp_target_variable='' ! particulate phosphorus target variable
dc_target_variable='' ! dissolved carbon target variable
pc_target_variable='' ! particulate carbon target variable
dbase = '../External/AED2/aed2_zoop_pars.nml'
simZoopFeedback = .false.
/
Examples
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Publications & References
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