## 3 Results and Discussion
### Aerosol Optical Properties
#### 3.3.1 Aerosol Scattering Properties
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Date**} & \multicolumn{2}{c}{**PM\({}_{2.5}\)**} & \multicolumn{2}{c}{**BC**} & \multirow{2}{*}{**BC/PM\({}_{2.5}\)**} & \multirow{2}{*}{**\(\sigma_{\rm s}\)\_550**} & \multirow{2}{*}{**\(\sigma_{\rm ab\_532}\)**} & \multirow{2}{*}{**\(\alpha_{\rm s}\)**} & \multirow{2}{*}{**b\_550**} & \multirow{2}{*}{**g\_550**} & \multirow{2}{*}{**\(\beta\)\_550**} & \multirow{2}{*}{**\(\omega_{\rm 0}\)**} \\  & \multicolumn{2}{c}{(**\(\mu\)g\(\cdot\)m\({}^{3}\))} & \multicolumn{2}{c}{(**\(\mu\)g\(\cdot\)m\({}^{3}\))} & & & & & & & \\ \hline \multirow{3}{*}{6 June 2012} & 26.00 & 2.71 & 0.09 & 0.22 & 0.02 & 1.60 & 0.10 & 0.66 & 0.24 & 0.92 \\  & (16.50, 46.50) & (1.11, 4.67) & (0.04, 0.17)(0.13, 0.35)(0.01, 0.04)(1.54, 1.85)(0.09, 0.11)(0.62, 0.68)(0.23, 0.25)(0.87, 0.96) \\ \cline{2-10}  & 35.00 & 2.90 & 0.07 & 0.39 & 0.02 & 1.49 & 0.09 & 0.67 & 0.23 & 0.95 \\  & (26.00, 54.50) & (2.33, 4.91) & (0.05, 0.17)(0.29, 0.54)(0.02, 0.04)(1.17, 1.56)(0.09, 0.10)(0.65, 0.68)(0.23, 0.24)(0.89, 0.96) \\ \cline{2-10}  & 36.00 & 2.65 & 0.07 & 0.27 & 0.02 & 1.57 & 0.10 & 0.66 & 0.24 & 0.93 \\  & (22.50, 41.00) & (2.22, 3.20) & (0.06, 0.11)(0.17, 0.36)(0.02, 0.03)(1.46, 1.71)(0.09, 0.11)(0.62, 0.68)(0.23, 0.25)(0.89, 0.95) \\ \cline{2-10}  & 29.00 & 2.74 & 0.10 & 0.22 & 0.02 & 1.72 & 0.11 & 0.62 & 0.25 & 0.91 \\
9 June 2012 & (23.50, 36.0) & (2.33, 3.92) & (0.08, 0.13)(0.13, 0.30)(0.02, 0.03)(1.57, 1.90)(0.10, 0.12)(0.61, 0.66)(0.24, 0.26)(0.87, 0.93) \\ \cline{2-10}  & 31.00 & 2.91 & 0.08 & 0.23 & 0.02 & 1.72 & 0.10 & 0.65 & 0.24 & 0.92 \\
10 June 2012 & (25.00, 43.0) & (1.71, 4.34) & (0.06, 0.12)(0.15, 0.41)(0.01, 0.04)(1.63, 1.79)(0.10, 0.11)(0.63, 0.67)(0.23, 0.25)(0.89, 0.94) \\ \cline{2-10}  & 304.00 & 11.58 & 0.03 & 2.45 & 0.10 & 1.52 & 0.10 & 0.66 & 0.23 & 0.96 \\
11 June 2012 & (22.00, 55.50)(2.22, 15.63)(0.02, 0.13)(0.21, 3.65)(0.02, 0.13)(1.39, 1.64)(0.10, 0.10)(0.66, 0.67)(0.23, 0.24)(0.92, 0.97) \\ \cline{2-10}  & 242.00 & 8.34 & 0.03 & 1.28 & 0.07 & 1.66 & 0.11 & 0.64 & 0.24 & 0.95 \\
12 June 2012 & (112.50, 384.0)(5.45, 10.23)(0.02, 0.07)(0.50, 2.05)(0.05, 0.08)(1.52, 1.80)(0.10, 0.12)(0.61, 0.67)(0.23, 0.26)(0.89, 0.97) \\ \cline{2-10}  & 130.00 & 5.89 & 0.05 & 0.59 & 0.05 & 1.61 & 0.11 & 0.63 & 0.24 & 0.93 \\
13 June 2012 & (83.50, 168.50) & (2.85, 7.90) & (0.03, 0.06)(0.29, 0.84)(0.02, 0.07)(1.50, 1.66)(0.10, 0.12)(0.60, 0.65)(0.24, 0.26)(0.89, 0.94) \\ \cline{2-10}  & 132.50 & 5.70 & 0.05 & 0.54 & 0.05 & 1.46 & 0.10 & 0.65 & 0.24 & 0.93 \\
14 June 2012 & (108.50, 139.0) & (4.44, 6.89) & (0.04, 0.05)(0.46, 0.75)(0.04, 0.06)(1.36, 1.53)(0.10, 0.11)(0.65, 0.67)(0.23, 0.24)(0.92, 0.95) \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Aerosol optical properties obtained during the study. The value of \(\beta\)_550 remained at \(\sim\)0.23 from 10-12 June, which can be considered as a low level. With increasing concentration of aerosol particles, the total amount of scattered light would increase, as would light scattered back into space and backscattered light. However, the ratio of the light scattered back into space to the total scattered light (\(\beta\)_550) would not necessarily increase. The study by [PERSON] _et al._ showed that the up-scatter fraction was 0.24, which is similar to our findings. Lower \(\beta\) values mean that haze pollutants can heat the atmosphere more efficiently [23] and in our study, the low value of \(\beta\) (0.23) indicates a heating effect on the air, which is consistent with the increased atmospheric temperature mentioned above. The aerosol optical properties measured during the study are summarized in Table 2.