Table 2.
Optical properties variation at other locations
| S.N | City | Period | SSA | AE | AOD | Concluding Remark | Reference |
|---|---|---|---|---|---|---|---|
| 1 | Goa | 2008 | 0.87–0.97 | 0.52–1.53 | 0.26–0.70 | AOD -O.70 (April) | [26] |
| 2 | Gadanki | 2008–2018 | 0.91–0.95 | 0.44–0.59 | SSA- lower (higher) in winter (summer) | [42] | |
| 3 | Kadapa | 2013–2015 | 0.83–0.92 | 1.75 (March) 0.65 (May) | 0.38 | SSA lower in winter; higher AOD (0.46) in summer | [27] |
| 4 | IGP (Patiala, Delhi, Dehradun and Kanpur) | 2003–2017 | 0.91 | 1.30 | 0.75 | Lower SSA and AE (burning hotspot) and better correlation at Delhi (MODIS AOD & ground based) | [18] |
| 5 | Delhi | 2000–2014 | 0.69 | 0.71 | During monsoon (higher AOD and AE) | [16] | |
| 6 | Gorakhpur | 2014–2018 | 0.92 | 0.65 | [24] | ||
| 7 | Chamoli and Dehradun | 2006–2015 |
1.05 (Dehradun) 1.49 (Chamoli) |
0.18 (Dehradun) 0.21 (Chamoli) |
Lower MODIS AOD | [25] | |
| 8 | Varanasi | 2011–2014 | 0.23–1.89 | 0.19–1.44 | 0.75 | Higher AOD during post monsoon | [41] |
| 9 | Jodhpur | 2004–2012 | 0.66 | [43] | |||
| 10 | Bhuvaneshwar | More than 1 | 0.39 to 0.96 | Higher (lower) AOD during February (July) | [44] | ||
| 11 | China | 0.88–0.92 | 0.71 (semi urban) 1.15 (urban) | 0.12 (rural) 0.79 (urban) | Higher AOD & AE in urban region. | [18] | |
| 12 | Tangshan, China | 2014–2015 | 1.12 | 0.80 | Industrial area | [20] | |
| 13 | Australia | 2001–2020 | 0.05 to 0.15 | Increasing trends was observed at most of the sites. | [29] | ||
| 14 | Karachi, Pakistan | 0.88–0.97 | 0.17–1.05 | 0.31–0.92 | Mean AOD − 0.48 | [19] | |
| 15 | Raipur, India | 2019–2021 | 0.93 | 1.20 | 0.53 | Highest AOD (AE) values in summer (winter) | Present study |