Area-scale ERs determined from aircraft measurements. Area-scale ERs for the western half determined using aircraft data for each flight for which analysis was possible. DOI: https://doi.org/10.1525/elementa.351.t3
Date . | Time window of measurements (local time) . | Altitude range (meters above ground level) . | CH4 range (ppb) . | C2H6 range (ppb) . | R2 range and number of legs . | Mean C2H6 to CH4 ER (in situ) . |
---|---|---|---|---|---|---|
9/22/2015 | 3:56 PM–4:12 PM | 403–735 | 1910–2050 | 1.3–3.7 | R2 = 0.69 for 1 leg | 1.2 ± 0.03% |
10/2/2015 | 12:47 PM–1:13 PM | 244–460 | 1940–2080 | 1.2–2.9 | R2 = 0.64 for 1 leg | 1.1 ± 0.04% |
10/5/2015 | 12:09 PM–2:05 PM | 157–444 | 1999–2337 | 2.3–8.4 | R2 from 0.67 to 0.91 for 7 legs | 1.2 ± 0.03% |
10/6/2015 | 11:04 AM–12:09 PM | 198–466 | 1990–2236 | 2.3–5.7 | R2 from 0.65 to 0.91 for 4 legs | 1.3 ± 0.05% |
10/7/2015 | 12:41 PM–3:19 PM | 138–560 | 1939–3500 | 1.2–11.4 | R2 from 0.67 to 0.90 for 10 legs | 1.3 ± 0.04% |
Date . | Time window of measurements (local time) . | Altitude range (meters above ground level) . | CH4 range (ppb) . | C2H6 range (ppb) . | R2 range and number of legs . | Mean C2H6 to CH4 ER (in situ) . |
---|---|---|---|---|---|---|
9/22/2015 | 3:56 PM–4:12 PM | 403–735 | 1910–2050 | 1.3–3.7 | R2 = 0.69 for 1 leg | 1.2 ± 0.03% |
10/2/2015 | 12:47 PM–1:13 PM | 244–460 | 1940–2080 | 1.2–2.9 | R2 = 0.64 for 1 leg | 1.1 ± 0.04% |
10/5/2015 | 12:09 PM–2:05 PM | 157–444 | 1999–2337 | 2.3–8.4 | R2 from 0.67 to 0.91 for 7 legs | 1.2 ± 0.03% |
10/6/2015 | 11:04 AM–12:09 PM | 198–466 | 1990–2236 | 2.3–5.7 | R2 from 0.65 to 0.91 for 4 legs | 1.3 ± 0.05% |
10/7/2015 | 12:41 PM–3:19 PM | 138–560 | 1939–3500 | 1.2–11.4 | R2 from 0.67 to 0.90 for 10 legs | 1.3 ± 0.04% |