Table 1.
Statistics reported in several validations studies comparing TROPOMI tropospheric NO2 against independent observations.
| Study | Location | Time period | Benchmark instrument | Bias (low) | Dispersion | Modification | Modified bias (low) |
|---|---|---|---|---|---|---|---|
| Chan et al. (2020) | Munich | May 2018–Apr 2019 | MAX-DOAS | 30 % | NA | In situ MAX-DOAS profiles | 17 % |
| Griffin et al. (2019) | Canadian oil sands | Mar–May 2018 (vl.01) | Pandora (direct Sun) | 15 %–30 % | NA | Higher-resolution profiles (10 km) and albedo | 0 %–25 % |
| Judd et al. (2020) | New York | Jun–Sep 2018 | GeoTASO | 19 %–33 % | NA | Higher-resolution profiles (12 km) | 7 %–19 % |
| Verhoelst et al. (2021) | Global | Apr 2018–Feb 2020 | MAX-DOAS | 37 % (average), 23 %–51 % (range) | 3.5 × 1015 molec/cm2 | NA | NA |
| P. Wang et al. (2020) | Atlantic and Pacific oceans | Four campaigns during Dec 2018–Jul 2019 | MAX-DOAS | Negligible | NA | NA | NA |
| Zhao et al. (2020) | Greater Toronto area | Mar 2018–Mar 2019 | Pandora (direct Sun) | 24 %–28 % (suburban/urban) +4 %–10 % (rural) | Higher-resolution profiles (10 km) and albedo | 13 %–24 % (suburban/urban) +14 %–15 % (rural) |
NA – not available