## 3 Results
### Trends
#### 3.3.2 Trends of the Aerosol, Tropospheric NO\({}_{2}\) and Clouds Radiative Effect
The strongest statistically significant trends are seen over Kozani  
\begin{table}
\begin{tabular}{c c c c c c} \hline
**Location** & **SSR** & **RE\({}_{\rm aer}\)** & **RE\({}_{\rm NO2}\)** & **RE\({}_{\rm ic}\)** & **RE\({}_{\rm ic}\)** \\ \hline Antikythera & \(0.05\pm 0.30\) & \(-0.15\pm 0.06\) & \(0.000\pm 0.000\) & \(-0.08\pm 0.23\) & \(0.15\pm 0.18\) \\  & (0.03\pm 0.17) & \(\underline{(-1.14\pm 0.41)}\) & (0.39\pm 0.44) & \((-0.25\pm 0.71)\) & (0.95\pm 1.16) \\ Argos & \(0.07\pm 0.22\) & \(\underline{-0.24\pm 0.07}\) & \(-0.001\pm 0.000\) & \(-0.28\pm 0.18\) & \(\underline{0.46\pm 0.13}\) \\  & (0.04\pm 0.12) & \(\underline{(-1.68\pm 0.51)}\) & \(\underline{(-1.56\pm 0.29)}\) & \((-0.92\pm 0.57)\) & \(\underline{(3.57\pm 1.03)}\) \\ Athens & \(0.35\pm 0.33\) & \(-0.08\pm 0.16\) & \(\underline{-0.008\pm 0.001}\) & \(-0.22\pm 0.23\) & \(0.02\pm 0.16\) \\  & (0.20\pm 0.19) & \((-0.55\pm 1.09)\) & \(\underline{(-3.44\pm 0.44)}\) & \((-0.7\pm 0.75)\) & (0.11\pm 1.08) \\ HCMR & \(-0.12\pm 0.26\) & \(0.05\pm 0.08\) & \(-0.001\pm 0.000\) & \(-0.07\pm 0.21\) & \(0.06\pm 0.13\) \\  & \((-0.06\pm 0.13)\) & \(\underline{(0.35\pm 0.57)}\) & \(\underline{(-1.11\pm 0.31)}\) & \((-0.24\pm 0.67)\) & (0.52\pm 1.08) \\ Ioannina & \(0.10\pm 0.44\) & \(-0.09\pm 0.09\) & \(0.000\pm 0.000\) & \(-0.37\pm 0.35\) & \(0.29\pm 0.25\) \\  & (0.06\pm 0.24) & \(-0.80\pm 0.82\) & \(-0.35\pm 0.57) & \((-0.70\pm 0.66)\) & (1.24\pm 1.08) \\ Kozani & \(0.29\pm 0.35\) & \(-0.14\pm 0.08\) & \(\underline{-0.008\pm 0.001}\) & \(-0.28\pm 0.27\) & \(0.10\pm 0.17\) \\  & (0.18\pm 0.21) & \((-1.25\pm 0.70)\) & \(\underline{(-3.91\pm 0.52)}\) & \((-0.61\pm 0.60)\) & (0.50\pm 0.84) \\ Mytilene & \(-0.27\pm 0.27\) & \(0.00\pm 0.09\) & \(0.000\pm 0.000\) & \(-0.11\pm 0.19\) & 0.28\pm 0.17 \\  & \((-0.14\pm 0.14)\) & \((-0.03\pm 0.58)\) & \((-0.36\pm 0.42)\) & \((-0.49\pm 0.82)\) & (1.99\pm 1.17) \\ Olympus & \(0.52\pm 0.45\) & \(-0.10\pm 0.06\) & \(\underline{-0.001\pm 0.000}\) & \(-0.67\pm 0.41\) & \(0.31\pm 0.23\) \\  & (0.37\pm 0.32) & \((-1.11\pm 0.73)\) & \((-1.87\pm 0.48)\) & \((-0.79\pm 0.49)\) & (1.33\pm 0.98) \\ Orestiada & \(0.50\pm 0.33\) & \(\underline{-0.20\pm 0.06}\) & \(-0.001\pm 0.000\) & \(-0.27\pm 0.31\) & 0.01\pm 0.20 \\  & (0.32\pm 0.21) & \(\underline{(-1.37\pm 0.40)}\) & \((-0.64\pm 0.38)\) & \((-0.61\pm 0.70)\) & (0.05\pm 1.00) \\ Patras & \(0.37\pm 0.33\) & \(\underline{-0.35\pm 0.14}\) & \(\underline{-0.001\pm 0.000}\) & \(-0.13\pm 0.29\) & 0.18\pm 0.25 \\  & (0.17\pm 0.16) & \(\underline{(-1.74\pm 0.67)}\) & \(\underline{(-1.56\pm 0.43)}\) & \((-0.56\pm 1.19)\) & (1.13\pm 1.53) \\ Preveza & \(0.22\pm 0.31\) & \(-0.12\pm 0.10\) & \(0.000\pm 0.000\) & \(-0.20\pm 0.19\) & 0.05\(\pm 0.20\) \\  & (0.12\pm 0.17) & \((-0.74\pm 0.62)\) & \((-0.49\pm 0.40)\) & \((-0.78\pm 0.74)\) & (0.28\pm 1.04) \\ Pylos & \(0.02\pm 0.25\) & \(-0.03\pm 0.07\) & \(0.000\pm 0.000\) & \(-0.34\pm 0.19\) & 0.31\(\pm 0.18\) \\  & (0.01\pm 0.14) & \((-0.24\pm 0.56)\) & \((-0.65\pm 0.36)\) & \((-1.02\pm 0.59)\) & (2.10\pm 1.26) \\ Rhodes & \(0.01\pm 0.29\) & \(-0.02\pm 0.09\) & \(0.000\pm 0.000\) & \(-0.06\pm 0.19\) & \(-0.03\pm 0.20\) \\  & (0.01\pm 0.16) & \((-0.14\pm 0.63)\) & \((-0.57\pm 0.46)\) & \((-0.28\pm 0.87)\) & (\(-0.19\pm 1.26\)) \\ Thessaloniki & \(\underline{0.67\pm 0.26}\) & \(\underline{-0.31\pm 0.09}\) & \(\underline{-0.004\pm 0.001}\) & \(-0.41\pm 0.22\) & \(\underline{0.14\pm 0.19}\) \\  & \(\underline{(0.40\pm 0.16)}\) &(\(-0.21\times 10^{15}\) molecules/cm\({}^{2}\)/year or \(-3.95\%\)/year), Athens (\(-0.19\times 10^{15}\) molecules/cm\({}^{2}\)/year or \(-3.57\%\)/year) and Thessaloniki (\(-0.11\times 10^{15}\) molecules/cm\({}^{2}\)/year or \(-2.89\%\)/year). However, it is obvious that tropospheric NO\({}_{2}\) cannot affect the SSR trends over the area examined here. The RE\({}_{\rm lc}\) magnitude exhibits negative trends over all the 16 locations.