Skip to main content
. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Atmos Environ (1994). 2020 Jan 31;224:117318. doi: 10.1016/j.atmosenv.2020.117318

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