## 3 Results
### Patterns of Primary Production and Nutrient Consumption Distribution  
This technique makes it possible to estimate the annual cycle of each nutrient's consumption, as well as to identify the limiting element of the photosynthesis process in a particular area.  
The results of each nutrient consumption values are calculated according to (Equation (10)) from the stock value (\(\Sigma\Delta P^{\text{nt}}_{reserv}\)), taking into account the inflow/outflow of this element due to the non-productive component (\(\Delta P_{\text{sed}}\)).  
\[\Sigma\Delta P^{\text{nt}}_{reserv}=\Delta P^{\text{nt}}_{c}+\Delta P_{\text{ sed}} \tag{24}\]  
The distribution of this value for the period of the photosynthesis process maximum development from 1 July to 30 September is shown in Figure 6.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Ref. [6]** & & & \multicolumn{2}{c}{**This Study and [48]**} \\ \hline
**Region** & \begin{tabular}{c} **Average** \\ **NCP\({}_{\text{Si}}\) gC/m\({}^{2}\)** \\ \end{tabular} & \begin{tabular}{c} **Average** \\ **NCP\({}_{\text{Si}}\) gC/m\({}^{2}\)** \\ \end{tabular} & \begin{tabular}{c} **Max** \\ **NCP\({}_{\text{Si}}\) gC/m\({}^{2}\)** \\ \end{tabular} & **Region** \\ \hline \hline \begin{tabular}{c} \
\begin{tabular}{c}
\begin{tabular}{c} \begin{  
The results of these evaluations show that:  
1. Throughout the Barents Sea, phosphate phosphorus is not a limiting factor in the development of the photosynthesis process. The consumption of this element increases from west to east from 40 to 70%.
2. The value of the nitrogen-nitrate total consumption actually in the entire water area of the eastern part of the sea in the summer, from the coast to the Franz Josef Landipelago, is at the level of the full consumption of this element in the process of photosynthesis and is 90-95%. In the western part of the sea, in waters that are composed of the maximum incoming Atlantic waters, the values of nitrogen consumption are much lower and are in the range from 40 to 70%, although, as will be shown below, the values of primary production in these waters are maximum.
3. The distribution of silicon consumption in the southern and central parts of the sea also tends to increase from west to east in the range of 30 to 60%. However, in the northern part of the sea, between the Svalbard and Franz Josef Land archipelagos, silicon can be a limiting factor in the development of the photosynthesis process.  
Based on the results of calculations, maps of the average monthly concentrations of primary production distribution in the Barents Sea by silicon and nitrogen were prepared. Figure 7 shows the distribution of \(\mathrm{NCP_{Si}}\) (Figure 7A) and \(\mathrm{NCP_{N}}\) (Figure 7B) values. According to the distribution of primary production, six centers can formally be distinguished in the Barents Sea, in four of which, there are increased values of this value (I-IV4), in two-lower values (V-VI).  
Figure 7: Estimated values of primary production (mg C m\({}^{-2}\)) for silicon (**A**) and nitrogen (**B**). Average values for the period from July to September. The numbers I to VI indicate the centers of regions with maximum or minimum values of primary production.