Table 2.
Overview of Observation Data Sets Used for GEOS‐CF Model Validation
| Description | Species | # Sites | Reference |
|---|---|---|---|
| Ozonesonde | O3 | 24 | Tilmes et al., 2012; Thompson et al., 2017 |
| NASA OMI NO2 v4.0 | Tropospheric column NO2 | global | Lamsal et al., 2021 |
| MOPITT v8 | Total column CO | global | Deeter et al., 2019 |
| MODIS | AOD at 550 nm | Global | Remer et al., 2005; Levy et al., 2010, 2015 |
| AERONET | AOD at 550 nm | 195 | Giles et al., 2019 |
| GAW WDCGG | CO | 54 | https://gaw.kishou.go.jp/ |
| GAW WDCRG | O3, NO2, SO2 | 48 (O3), 6 (NO2), 9 (SO2) | https://www.gaw-wdcrg.org/ |
| OpenAQ | O3, NO2, SO2, PM2.5 | 3151 (O3), 2789 (NO2), 1221 (SO2), 2667 (PM2.5) | https://openaq.org |