Table 1.
Paris Metropolitan Area NOx emissions inferred from TROPOMI in 2018, and conditions under which they have been derived.
| Day | Time (utc) | Emissions (mol s−1) | Wind | NOx lifetime | [NOx]:[NO2] | Surface temperature | PBL height (m) |
R2 | RMS residuals | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Speed | Direction | CAMS | Eiffel Tower | ||||||||
|
Thu 22–02 |
12:25 | 110.0 ± 37.4 | 8.6 m/s | 51° (NE) | 16.0 hrs | 1.83 | 1.86 | 3 °C | 874 | 0.990 | 8% |
|
Fri 23-02 |
12:06 | 93.3 ± 31.3 | 9.0 m/s | 70° (ENE) | 10.9 hrs | 1.72 | 1.70 | 2 °C | 907 | 0.996 | 4% |
| Sun 25-02 | 11:29 | 51.3 ± 16.5 | 11.0 m/s | 77° (E) | 9.4 hrs | 1.75 | 1.78 | 0 °C | 798 | 0.933 | 15% |
| Sun 25-02 | 13:10 | 74.4 ± 23.9 | 11.0 m/s | 77° (E) | 11.4 hrs | 1.75 | 1.86 | 0 °C | 798 | 0.973 | 10% |
| Mon 26-02 | 12:51 | 78.7 ± 24.9 | 12.2 m/s | 56° (NE) | 10.3 hrs | 1.73 | 1.78 | −2 °C | 1545 | 0.925 | 21% |
|
Tue 17-04 |
12:18 | 87.6 ± 32.8 | 6.4 m/s |
197° (S) |
1.6 hrs | 1.39 | 1.58 | 17 °C | 1187 | 0.995 | 5% |
|
Wed 18-04 |
12:59 | 64.5 ± 23.5 | 6.9 m/s |
100° (E) |
2.0 hrs | 1.19 | 1.16 | 23 °C | 1251 | 0.994 | 5% |
|
Sat 21-04 |
12:44 | 38.4 ± 24.1 | 2.7 m/s |
100° (E) |
2.9 hrs | 1.31 | 1.28 | 24 °C | 2106 | 0.970 | 9% |
|
Sun 22-04 |
12:25 | 27.7 ± 9.1 | 9.7 m/s |
230° (SW) |
2.7 hrs | 1.26 | 1.39 | 24 °C | 2188 | 0.840 | 31% |
|
Tue 24-04 |
13:29 | 86.8 ± 36.3 | 5.0 m/s |
231° (SW) |
2.8 hrs | 1.48 | N.A. | 15 °C | 1292 | 0.980 | 9% |
|
Wed 02-05 |
12:39 | 65.2 ± 21.9 | 9.0 m/s | 206° (SW) | 1.6 hrs | 1.18 | 1.39 | 14 °C | 1499 | 0.990 | 7% |
|
Fri 04-05 |
12:01 | 50.4 ± 18.6 | 6.6 m/s | 23° (NNE) | 2.9 hrs | 1.21 | 1.36 | 16 °C | 1051 | 0.957 | 12% |
|
Sat 05-05 |
11:42 | 49.2 ± 18.0 | 6.8 m/s | 27° (NNE) | 2.9 hrs | 1.22 | 1.24 | 19 °C | 682 | 0.984 | 7% |
|
Sat 05-05 |
13:23 | 33.5 ± 12.2 | 6.8 m/s | 27° (NNE) | 1.8 hrs | 1.22 | 1.11 | 19 °C | 682 | 0.964 | 10% |
|
Sun 06-05 |
13:04 | 24.8 ± 10.1 | 5.3 m/s | 53° (ENE) | 1.9 hrs | 1.20 | 1.31 | 23 °C | 696 | 0.937 | 11% |
|
Tue 08-05 |
12:26 | 45.6 ± 36.7 | 2.0 m/s | 5° (N) | 2.1 hrs | 1.23 | 1.16 | 24 °C | 1699 | 0.959 | 10% |
|
Wed 09-05 |
13:49 | 36.4 ± 17.3 | 4.0 m/s | 300° (WNW) | 2.5 hrs | 1.16 | 1.17 | 19 °C | 775 | 0.990 | 7% |
|
Fri 11-05 |
13:11 | 48.4 ± 20.9 | 4.7 m/s | 167° (S) | 2.2 hrs | 1.21 | 1.44 | 17 °C | 1491 | 0.982 | 9% |
|
Thu 17-05 |
12:58 | 44.8 ± 18.7 | 5.0 m/s | 12° (N) | 2.4 hrs | 1.26 | 1.60 | 15 °C | 844 | 0.992 | 6% |
|
Fri 18-05 |
12:39 | 40.1 ± 18.0 | 4.4 m/s | 21° (N) | 3.2 hrs | 1.24 | 1.72 | 14 °C | 787 | 0.983 | 9% |
|
Sat 19-05 |
12:20 | 36.4 ± 17.3 | 4.0 m/s | 26° (NNE) | 2.4 hrs | 1.25 | 1.31 | 18 °C | 1038 | 0.903 | 24% |
|
Wed 20-06 |
12:20 | 54.3 ± 57.3 | 0.5 m/s | 7° (N) | 3.3 hrs | 1.61 | 1.4 | 25 °C | 959 | 0.984 | 11% |
|
Wed 20-06 |
14:00 | 75.6 ± 67.9 | 1.8 m/s | 7° (N) | 3.9 hrs | 1.55 | 1.4 | 25 °C | 959 | 0.942 | 20% |
|
Thu 21-06 |
12:02 | 30.5 ± 12.8 | 5.0 m/s | 352° (N) | 2.0 hrs | 1.30 | 1.66 | 20 °C | 1139 | 0.947 | 15% |
|
Sat 23-06 |
13:05 | 17.7 ± 8.3 | 4.1 m/s | 35° (NNE) | 1.7 hrs | 1.34 | 1.44 | 19 °C | 1094 | 0.653 | 38% |
|
Mon 25-06 |
12:27 | 51.7 ± 21.2 | 5.2 m/s | 46° (NE) | 1.8 hrs | 1.26 | 1.42 | 23 °C | 1591 | 0.976 | 11% |
|
Tue 26-06 |
12:08 | 44.8 ± 22.8 | 3.6 m/s | 29° (NNE) | 2.1 hrs | 1.33 | 1.41 | 24 °C | 1049 | 0.949 | 18% |
|
Tue 26-06 |
13:50 | 37.1 ± 18.9 | 3.6 m/s | 29° (NNE) | 2.1 hrs | 1.33 | 1.26 | 24 °C | 1049 | 0.990 | 8% |
|
Wed 27-06 |
13:31 | 49.5 ± 23.2 | 4.1 m/s | 50° (NE) | 1.1 hrs | 1.25 | 1.29 | 26 °C | 1360 | 0.964 | 11% |
|
Thu 28-06 |
13:12 | 41.9 ± 16.1 | 6.0 m/s | 54° (NE) | 2.5 hrs | 1.50 | 1.31 | 26 °C | 1967 | 0.962 | 10% |
Days with two estimates had Paris covered by two successive orbits (orbit 1916 and 1917 on 25 February, 2895 and 2896 on 5 May, 3548 and 3549 on 20 June, 3633 and 3634 on 26 June).