NPZ-model/Physical-Processes.md

@@ -19,8 +19,9 @@ The underwater light conditions is depending on the the irradiation and the exti
 I_{z} = I_{0} \cdot e^{-k_{d} \cdot z}
 ```
 
-The extinction coefficient ($`k_{d}`$) is depending on the amount of Total Particulate Matter (TPM) in the water that varies over the season (described by the [cosine function](Data#suspended-solids)). The extinction coefficient is calculated from the TPM concentration using a simplified version of the function that is used by Los and Wijsman (2007), based on Van Gils and Tatman (2003).  
-Los and Wijsman (2007) use the relation from Van Gils and Tatman (2003)  
+The extinction coefficient ($`k_{d}`$) is depending on the amount of Total Particulate Matter (TPM) in the water that varies over the season (described by the [cosine function](Data#suspended-solids)). The extinction coefficient is calculated from the TPM concentration using a simplified version of the function that is used by Los and Wijsman (2007)[^1395], based on Van Gils and Tatman (2003)[^3230].  
+Los and Wijsman (2007)[^1395] use the relation from Van Gils and Tatman (2003)[^3230].  
+
 
 ```math
 k_{d} = 0.24 + 0.036 \cdot TPM
@@ -63,3 +64,7 @@ Flux_{i,j} =  \frac{Ex_{i,j}\cdot(C_{j}-C_{i})}{Vol_{i}}
 Where $`Flux_{i,j}`$ is the increase in concentration in compartment $`i`$ [mmol-N m<sup>-3</sup> d<sup>-1</sup>] due to the water exchange between compartment $`i`$ and $`j`$. $`Ex_{i,j}`$ is the exchange rate between compartment $`i`$ and $`j`$ [m<sup>3</sup> d<sup>-1</sup>]. $`C_{i}`$ and $`C_{j}`$ are the concentrations of the state variables in compartment $`i`$ and $`j`$ [mmol-N m<sup>-3</sup>], respectively. $`Vol_{i}`$ is the volume of compartment $`i`$ [m<sup>3</sup>].
 
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+[^1395]: Los, F. J. en J. W. M. Wijsman (2007) Application of a validated primary production model (BLOOM) as a screening tool for marine, coastal and transitional waters. Journal of Marine Systems 64: 201-215.[link](https://doi.org/10.1016/j.jmarsys.2006.03.009)
+[^3230]: Van Gils, J. A. and S. Tatman (2003) Light penetration in the water column. WL | Delft Hydraulics, Report.