Site | Parameters | Observed/model | Season | |||
DJF | MAM | JJA | SON | |||
Nairobi | AOD (550 nm) | AERONET/MODIS | 0.24 ± 0.07 | 0.18 ± 0.05 | 0.20 ± 0.04 | 0.16 ± 0.06 |
OPAC Derived | 0.26 ± 0.06 | 0.20 ± 0.07 | 0.23 ± 0.08 | 0.18 ± 0.07 | ||
RMSE | 0.02 | 0.03 | 0.02 | 0.02 | ||
ÅE (470 - 660 nm) | AERONET/MODIS | 1.43 ± 0.33 | 1.04 ± 0.26 | 1.53 ± 0.24 | 1.36 ± 0.14 | |
OPAC Derived | 1.40 ± 0.14 | 1.06 ± 0.21 | 1.51 ± 0.11 | 1.30 ± 0.25 | ||
RMSE | 0.02 | 0.02 | 0.03 | 0.04 | ||
Columnar ozone (DU) | OMI | 268 ± 15 | 283 ± 13 | 264 ± 12 | 278 ± 20 | |
Precipitable water vapor (cm) | MODIS-Terra | 1.4 ± 0.4 | 4.5 ± 0.3 | 1.1 ± 0.5 | 2.5 ± 0.9 | |
Rainfall (mm) | From NCEP re-analysis | 10.90 | 138.87 | 37.36 | 114.03 | |
Mbita | AOD (550 nm) | AERONET/MODIS | 0.21 ± 0.06 | 0.15 ± 0.05 | 0.20 ± 0.07 | 0.18 ± 0.05 |
OPAC Derived | 0.23 ± 0.05 | 0.20 ± 0.06 | 0.21 ± 0.04 | 0.19 ± 0.03 | ||
RMSE | 0.03 | 0.03 | 0.01 | 0.03 | ||
ÅE (470 - 660 nm) | AERONET/MODIS | 1.46 ± 0.31 | 1.14 ± 0.26 | 1.57 ± 0.20 | 1.46 ± 0.17 | |
OPAC Derived | 1.43 ± 0.14 | 1.10 ± 0.21 | 1.56 ± 0.12 | 1.43 ± 0.11 | ||
RMSE | 0.01 | 0.03 | 0.01 | 0.02 | ||
Columnar ozone (DU) | OMI | 264 ± 17 | 278 ± 19 | 260 ± 18 | 271 ± 21 | |
Precipitable water vapor (cm) | MODIS-Terra | 1.8 ± 0.6 | 4.9 ± 0.5 | 1.6 ± 0.4 | 3.0 ± 0.7 | |
Rainfall (mm) | From NCEP re-analysis | 12.30 | 137.31 | 34.86 | 114.61 | |
Malindi | AOD (550 nm) | AERONET/MODIS | 0.26 ± 0.08 | 0.20 ± 0.05 | 0.22 ± 0.06 | 0.20 ± 0.07 |
OPAC Derived | 0.28 ± 0.07 | 0.22 ± 0.04 | 0.25 ± 0.03 | 0.21 ± 0.06 | ||
RMSE | 0.02 | 0.02 | 0.01 | 0.02 | ||
ÅE (470 - 660 nm) | AERONET/MODIS | 1.01 ± 0.11 | 0.99 ± 0.13 | 0.78 ± 0.11 | 0.96 ± 0.12 | |
OPAC Derived | 1.00 ± 0.15 | 0.94 ± 0.10 | 0.75 ± 0.10 | 0.94 ± 0.16 | ||
RMSE | 0.03 | 0.02 | 0.01 | 0.02 | ||
Columnar ozone (DU) | OMI | 271 ± 10 | 272 ± 14 | 261 ± 18 | 272 ± 21 | |
Precipitable water vapor (cm) | MODIS-Terra | 2.1 ± 0.3 | 5.4 ± 0.1 | 1.9 ± 0.3 | 3.4 ± 0.5 | |
Rainfall (mm) | From NCEP re-analysis | 6.67 | 105.31 | 26.16 | 98.18 | |
Mau forest complex | AOD (550 nm) | AERONET/MODIS | 0.16 ± 0.03 | 0.10 ± 0.04 | 0.13 ± 0.06 | 0.11 ± 0.07 |
OPAC Derived | 0.17 ± 0.01 | 0.12 ± 0.07 | 0.16 ± 0.07 | 0.13 ± 0.08 | ||
RMSE | 0.02 | 0.03 | 0.03 | 0.02 | ||
ÅE (470 - 660 nm) | AERONET/MODIS | 1.56 ± 0.21 | 1.17 ± 0.13 | 1.57 ± 0.10 | 1.66 ± 0.17 | |
OPAC Derived | 1.54 ± 0.16 | 1.14 ± 0.11 | 1.56 ± 0.17 | 1.64 ± 0.11 | ||
RMSE | 0.03 | 0.03 | 0.02 | 0.03 | ||
Columnar ozone (DU) | OMI | 265 ± 10 | 280 ± 15 | 261 ± 15 | 275 ± 21 | |
Precipitable water vapor (cm) | MODIS-Terra | 1.4 ± 0.2 | 3.1 ± 0.6 | 1.1 ± 0.8 | 2.2 ± 0.3 | |
Rainfall (mm) | From NCEP re-analysis | 11.00 | 127.89 | 37.45 | 111.01 |