## 3 Results and Discussion
Although the years of the selected weeks are not identical, it can be observed that there is a slight difference in the periods (months and days) of the year for the sites studied. This difference could be due to the variations of the average temperatures that decrease with the latitude. However, the variations of the PAR between locations are very small and are due to the small differences in latitude from one point to another. The latter may have little influence on the expected results, especially since the RAP difference is very little between locations. Other factors that also play a very important role in the generation of weeks are the wfs assigned to the variables and the lag number (Table 3). If we focus on one column (wf value) from Table 3, we can see that almost the same weeks come back with different positions when we change the lag number. Likewise, when we look at a lag number, the trend of results also changes each time we change the distribution of wfs and in the same sense as previously mentioned, hence the interest in choosing several wf options that can compensate for the lack of information of the meteorological parameter with the most important impact on the growth of microalgae. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline  & \multicolumn{6}{c}{**Spring**} \\ \hline  & \multicolumn{3}{c}{**Temperature (\({}^{\circ}\)C)**} & \multicolumn{3}{c}{**Solar Irradiance (W/m\({}^{2}\))**} \\  & **Tmx** & **Tmn** & **Tme** & **Trg** & **PAR** & **Nsol** \\ \hline Mean & 16.25 & 5.40 & 10.84 & 10.85 & 91.26 & 13.05 \\ Median & 16.05 & 5.11 & 10.45 & 10.98 & 92.99 & 13.13 \\ Av. Std. Des & 4.81 & 3.41 & 3.97 & 3.43 & 28.99 & 1.04 \\ \hline \hline  & \multicolumn{6}{c}{**Summer**} \\ \hline  & \multicolumn{3}{c}{**Temperature (\({}^{\circ}\)C)**} & \multicolumn{3}{c}{**Solar irradiance(W/m\({}^{2}\))**} \\  & **Tmx** & **Tmn** & **Tme** & **Trg** & **PAR** & **Nsol** \\ \hline Mean & 28.46 & 15.54 & 22.29 & 12.91 & 126.57 & 14.35 \\ Median & 29.21 & 16.00 & 22.88 & 13.30 & 130.40 & 14.58 \\ Av. Std. Des & 4.41 & 3.26 & 3.80 & 2.48 & 20.52 & 0.57 \\ \hline  & \multicolumn{6}{c}{**Autumn**} \\ \hline  & \multicolumn{3}{c}{**Temperature (\({}^{\circ}\)C)**} & \multicolumn{3}{c}{**Solar irradiance(W/m\({}^{2}\))**} \\  & **Tmx** & **Tmn** & **Tme** & **Trg** & **PAR** & **Nsol** \\ \hline Mean & 17.27 & 8.00 & 12.39 & 9.27 & 61.25 & 10.91 \\ Median & 16.71 & 8.06 & 12.06 & 9.42 & 58.03 & 10.85 \\ Av. Std. Des & 6.10 & 4.54 & 5.18 & 3.35 & 26.51 & 1.02 \\ \hline  & \multicolumn{6}{c}{**Winter**} \\ \hline  & \multicolumn{3}{c}{**Temperature (\({}^{\circ}\)C)**} & \multicolumn{3}{c}{**Solar irradiance(W/m\({}^{2}\))**} \\  & **Tmx** & **Tmn** & **Tme** & **Trg** & **PAR** & **Nsol** \\ \hline Mean & 8.61 & 0.50 & 4.10 & 8.11 & 39.68 & 9.63 \\ Median & 8.54 & 0.12 & 4.12 & 8.00 & 41.24 & 9.39 \\ Av. Std. Des & 2.91 & 2.98 & 2.65 & 3.07 & 16.35 & 0.55 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Long-term daily statistics in Colmenarejo Este. Table 4 shows the information for all generated candidate weeks for the spring season in Colmenarejo Este that are represented in Table 3. In Table 4, the number of repetitions of these generated candidate weeks is also shown, which are represented by their order number in the sequence of 1204 spring weeks. Once a candidate week is selected, its sequence number identifies the start of the week by giving the corresponding year, month, and day. The Nsol of the fourth day (\(\rm{Nsol_{q}^{w}}\)) of each of these candidate weeks is also given in this table, as well as the absolute value of the difference \(\left(\Delta Nsol_{q}^{w}\right)\) between the Nsol of the fourth day of the week in the middle of the season \(\left(\rm{Nsol_{q/2}^{w}}\right)\) and the Nsol of the candidate week \(\left(\rm{Nsol_{q}^{w}}\right)\). This difference allows us to appreciate the position of the week in relation to the extremities of that season. As mentioned above, this avoids having a typical week with weather conditions closer to the earlier or later season.