Table 1.
Hourly averages of NR DRIVE and NR GIT near-road continuous instrumentation. September 8, 2014 to January 5, 2015.
BC (ug m−3) | CO (ppb) | NO (ppb) | NO2 (ppb) | NOx (ppb) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
DRIVE | GIT | DRIVE | GIT | DRIVE | GIT | DRIVE | GIT | DRIVE | GIT | ||
N | 2282 | 1115 | 2178 | 2816 | 2666 | 2798 | 2666 | 2798 | 2666 | 2798 | |
Total | Mean | 1.6 | 1.7 | 425 | 624 | 21 | 38 | 29 | 20 | 50 | 57 |
9/8–1/5 | SD | 1.3 | 1.2 | 210 | 338 | 24 | 29 | 16 | 8.6 | 35 | 34 |
IQR | 0.7 – 2.2 | 0.86 – 2.2 | 278 – 515 | 400 – 800 | 5.6 – 29 | 17 – 51 | 17 – 38 | 13 – 25 | 25 – 67 | 32 – 74 | |
Min-Max | 0.06 – 13 | 0.13 – 9.4 | 133 – 1860 | 0 – 2200 | 0 – 201 | 1.0 – 233 | 2.4 – 94 | 2.3 – 52 | 2.7 – 252 | 4.9 – 263 | |
N | 469 | - | 526 | 543 | 419 | 540 | 419 | 540 | 419 | 540 | |
September | Mean | 1.9 | - | 414 | 689 | 18 | 34 | 32 | 19 | 50 | 52 |
9/1–9/30 | SD | 1.2 | - | 157 | 264 | 15 | 20 | 13 | 6.4 | 26 | 24 |
IQR | 0.9 – 2.5 | - | 291 – 502 | 500 – 900 | 6.9 – 28 | 18 – 45 | 22 – 39 | 14 – 23 | 30 – 66 | 34 – 68 | |
Min-Max | 0.2 – 8.8 | - | 136 – 1306 | 0 – 1500 | 0 – 95 | 1.3 – 118 | 4.4 – 82 | 4.8 – 42 | 3.7 – 174 | 11 – 139 | |
N | 529 | - | 672 | 713 | 663 | 720 | 663 | 720 | 663 | 720 | |
October | Mean | 1.7 | - | 404 | 584 | 20 | 31 | 33 | 20 | 53 | 50 |
10/1–10/31 | SD | 1.4 | - | 185 | 242 | 21 | 23 | 17 | 8.1 | 33 | 27 |
IQR | 0.7 – 2.3 | - | 275 – 498 | 400 – 700 | 5.9 – 26 | 14 – 42 | 19 – 44 | 13 – 25 | 27 – 71 | 30 – 66 | |
Min-Max | 0.2 – 12 | - | 133 – 1304 | 0 – 1700 | 0.2 – 155 | 1.0 – 125 | 2.8 – 94 | 2.3 – 49 | 3.7 – 202 | 5.8 – 150 | |
N | 552 | 251 | 662 | 707 | 720 | 700 | 720 | 700 | 720 | 700 | |
November | Mean | 1.4 | 1.4 | 430 | 665 | 20 | 38 | 29 | 21 | 49 | 59 |
11/1–11/30 | SD | 1.3 | 1.1 | 227 | 356 | 25 | 33 | 17 | 11 | 39 | 40 |
IQR | 0.6 – 1.9 | 0.7 – 1.8 | 270 – 524 | 400 – 800 | 4.9 – 24 | 14 – 51 | 15 – 39 | 12 – 28 | 21 – 62 | 28 – 77 | |
Min-Max | 0.2 – 13 | 0.2 – 5.8 | 138 – 1594 | 100 – 2100 | 0 – 180 | 1.0 – 186 | 4.2 – 82 | 2.8 – 52 | 4.0 – 225 | 4.9 – 213 | |
N | 612 | 744 | 318 | 733 | 744 | 722 | 744 | 722 | 744 | 722 | |
December | Mean | 1.6 | 1.9 | 477 | 677 | 24 | 49 | 26 | 19 | 50 | 68 |
12/1 – 12/31 | SD | 1.4 | 1.3 | 280 | 367 | 28 | 35 | 13 | 8 | 37 | 40 |
IQR | 0.7 – 2.0 | 1.0 – 2.4 | 285 – 593 | 500 – 900 | 5.5 – 34 | 23 – 65 | 16 – 34 | 12 – 24 | 24 – 67 | 39 – 89 | |
Min-Max | 0.06 – 12 | 0.1 – 9.4 | 168 – 1860 | 0 – 2200 | 0.05 – 201 | 1 – 233 | 2.4 – 75 | 3.7 – 47 | 2.7 – 252 | 5.1 – 263 |
BC: Black carbon, CO: Carbon monoxide, NO: Nitric oxide, NO2: Nitrogen dioxide, NOx: Nitrogen oxides, O3: Ozone, T: Temperature, N: Number of hours with observations, SD: Standard deviation, IQR: Inter Quartile Range, Min: Minimum observation, Max: Maximum observation