| ... | ... | @@ -37,43 +37,6 @@ The shellfish populations are controlled by a variable mortality (MortShellfish) |
|
|
|
|
|
|
|
|
|
|
|
[top](NPZ model)
|
|
|
|
# Physical processes
|
|
|
|
|
|
|
|
[top](NPZ model)
|
|
|
|
## Temperature correction factor
|
|
|
|
Most of the processed are influenced by the temperature. In the model a temperature correction factor, $`T_{fac}`$. [-] is used to correct for ambient water temperature.
|
|
|
|
|
|
|
|
```math
|
|
|
|
T_{fac} = e^{( \frac{T-10}{10}\cdot\log(Q_{10}))}
|
|
|
|
```
|
|
|
|
|
|
|
|
Where T is the ambient water temperature and $`Q_{10}`$ indicates the relative increase in the rate for an increase of the water temperature with 10 °C.
|
|
|
|
|
|
|
|
[top](NPZ model)
|
|
|
|
## SinkDet
|
|
|
|
The detritus sinks to the sea floor with a constant sinking velocity ($`SinkinRate_{Det}`$)[m d<sup>-1</sup>]. The units of SinkDet is [mmol N m<sup>-2</sup> d<sup>-1</sup>].
|
|
|
|
```math
|
|
|
|
SinkDet = SinkinRate_{Det}\cdot\ Det
|
|
|
|
```
|
|
|
|
[top](NPZ model)
|
|
|
|
## SinkPhy
|
|
|
|
The phytoplankton sinks to the sea floor with a constant sinking velocity ($`SinkinRate_{Phy}`$)[m d<sup>-1</sup>]. The units of SinkPhy is [mmol N m<sup>-2</sup> d<sup>-1</sup>].
|
|
|
|
```math
|
|
|
|
SinkPhy = SinkinRate_{Phy}\cdot\ Phyto
|
|
|
|
```
|
|
|
|
|
|
|
|
[top](NPZ model)
|
|
|
|
## Transport
|
|
|
|
State variables in the water column (DIN, Phyto, Zoo and Det) are transported by tidal currents. This transport is modeled as exchange rates between the neighboring compartments. It is assumed that the exchange rates are bi-directional, i.e. the exchange rate [m<sup>3</sup> d<sup>-1</sup>]. from compartment 1 to compartment 2 is the same as the exchange rate from compartment 2 to 1.
|
|
|
|
|
|
|
|
```math
|
|
|
|
Flux_{1,2} = \frac{Ex_{1,2}\cdot(C_{1}-C_{2})}{Vol_{2}}
|
|
|
|
```
|
|
|
|
|
|
|
|
Where $`Flux_{1,2}`$ is the import from compartment 2 to compartment 1 [mmol N m<sup>-3</sup> d<sup>-1</sup>]. $`Ex_{1,2}`$ is the exchange rate between compartment 1 and 2 [m<sup>3</sup> d<sup>-1</sup>]. $`C_{1}`$ and $`C_{2}`$ are the concentrations of the state variables in compartment 1 and 2 [mmol N m<sup>-3</sup>], respectively. $`Vol_{2}`$ is the volume of compartment 2 [m<sup>3</sup>].
|
|
|
|
|
|
|
|
[top](NPZ model)
|
|
|
|
|
|
|
|
# Biological processes
|
|
|
|
|
|
|
|
## DINuptake
|
| ... | ... | |