# Geographical Distribution of Global Radiation and Sunshine Duration over the Island of Cyprus
## 3 Results and Discussion
### Daily Values
#### 3.1.2 Monthly Variability of Daily Global Radiation and Sunshine Duration  
The variability of the daily values of global radiation and sunshine duration was also demonstrated through the boxplots of each month of the year (Figure 12). The boxplots present the mean and median, the IQR, as well as the outliers of each variable. The smooth curve represents the mean daily values of each month of the year. As it is indicated from the length of the boxplots, the spring, autumn, and winter seasons showed the greatest variability. Outliers were observed mainly in the summer months. As it can be seen, the daily irradiation ranged mainly between 3 and 32 MJ/m\({}^{2}\).  
Figure 9: Geographical distribution of seasonal and annual mean daily sunshine duration.  
Figure 10: Seasonal and yearly relationships of mean daily global irradiation (MJ/m\({}^{2}\)) with elevation (m): (a) Spring, (b) Summer, (c) Autumn, (d) Winter, (e) Year.  
Figure 11: Seasonal and Yearly relationships of mean daily sunshine duration (h/d) with elevation (m): (a) Spring, (b) Summer, (c) Autumn, (d) Winter, (e) Year.  
Table 5 shows the mean daily values and their standard deviations as well as the percentiles of the daily global irradiation for each month of the year for the whole period of measurements. The highest daily global irradiation was almost 32 MJ/m\({}^{2}\) and it was recorded at Kambos, while it was about 31 MJ/m\({}^{2}\) at the rest stations. The median (50 percentile) was about 27 MJ/m\({}^{2}\) at the mountainous site, and about 29 MJ/m\({}^{2}\) at the rest of the sites in June.  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c} \hline \hline \multicolumn{10}{c}{**(a)**} \\ \hline \multicolumn{10}{c}{**Pentakomo**} \\ \hline \multicolumn{10}{c}{**Descriptive Statistics and Percentiles of Daily Global Irradiation (MJ/m\({}^{2}\))**} \\ \hline
**Month** & **N** & **Mean** & **StDev** & **Min** & **10\%** & **20\%** & **30\%** & **40\%** & **50\%** & **60\%** & **70\%** & **80\%** & **90\%** & **Max** \\ \hline
**1** & 75 & 10.1 & 2.8 & 2.8 & 6.5 & 7.8 & 8.5 & 9.3 & 10.3 & 10.9 & 12.1 & 12.5 & 13.7 & 15.5 \\
**2** & 76 & 13.5 & 4.0 & 1.9 & 6.7 & 10.4 & 12.8 & 14.0 & 14.5 & 15.1 & 15.9 & 16.7 & 17.9 & 18.4 \\
**3** & 71 & 18.0 & 4.5 & 3.1 & 11.4 & 14.4 & 16.3 & 18.0 & 18.8 & 19.9 & 20.7 & 21.9 & 23.0 & 23.9 \\
**4** & 84 & 22.3 & 4.7 & 9.7 & 14.2 & 18.2 & 21.4 & 22.7 & 23.7 & 25.1 & 25.5 & 26.1 & 26.7 & 27.8 \\
**5** & 81 & 27.3 & 2.8 & 16.6 & 24.4 & 25.7 & 26.7 & 27.6 & 28.1 & 28.6 & 29.1 & 29.3 & 29.6 & 30.3 \\
**6** & 71 & 28.4 & 2.5 & 16.1 & 25.5 & 28.0 & 28.3 & 28.7 & 28.9 & 29.4 & 29.7 & 29.9 & 30.0 & 30.4 \\
**7** & 83 & 27.6 & 0.9 & 25.1 & 26.4 & 26.8 & 27.2 & 27.5 & 27.6 & 27.8 & 27.9 & 28.4 & 28.7 & 29.8 \\
**8** & 84 & 24.2 & 1.4 & 18.3 & 22.3 & 23.1 & 23.5 & 24.1 & 24.4 & 24.7 & 24.9 & 25.5 & 25.9 & 27.2 \\
**9** & 90 & 20.2 & 1.7 & 16.3 & 17.8 & 18.5 & 19.3 & 19.7 & 20.0 & 20.9 & 21.3 & 21.7 & 22.4 & 24.4 \\
**10** & 85 & 15.0 & 3.0 & 3.2 & 10.8 & 13.5 & 14.3 & 14.9 & 15.7 & 16.2 & 16.7 & 17.1 & 18.1 & 19.7 \\
**11** & 85 & 11.2 & 2.3 & 4.4 & 7.7 & 9.3 & 10.4 & 10.9 & 11.8 & 12.4 & 12.7 & 13.0 & 13.5 & 14.6 \\
**12** & 76 & 8.8 & 2.7 & 1.7 & 4.0 & 6.6 & 7.7 & 8.9 & 9.8 & 10.4 & 10.8 & 11.0 & 11.2 & 12.7 \\
**Year** & 961 & 18.9 & 7.4 & 1.7 & 9.0 & 11.5 & 13.7 & 16.4 & 19.1 & 22.1 & 24.6 & 26.8 & 28.4 & 30.4 \\ \hline \hline \end{tabular}
\end{table}
Table 5: Basic descriptive statistics and percentiles of the daily global irradiation (MJ/m\({}^{2}\)) for each month of the year for the selected stations: (**a**) Pentakomo, (**b**) Athalassa, (**c**) Kambos, (**d**) Agros.  
Figure 12: Monthly boxplots of daily global irradiation (MJ/m\({}^{2}\)) and daily sunshine duration (h and tenths): (**a**) Pentakomo, (**b**) Athalassa, (**c**) Kambos, (**d**) Agros. The asterisks represent the outliers.