Table 1. Average (± confidence interval) water-atmosphere CH4 flux rates and gas transfer velocities using different empirical k models.
na, not available.
| k model | Variables* | BR wet | BR dry | FR wet | FR dry | JR wet | JR dry | ||||||
|
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
flux (μmol m−2 day−1) |
k600 (cm hour−1) |
||
| R17 (27) | v | 236.5 ± 7.4 |
5.7 | 103.7 ± 3.6 |
7.3 | 1059.0 ± 48.9 |
15.0 | 95.3 ± 6.4 |
8.3 | na | na | 484.4 ± 9.4 |
9.8 |
| R17 (27) | v, u | 283.7 ± 8.3 |
6.8 | 104.6 ± 4.3 |
6.9 | 1110.7 ± 49.5 |
16.4 | 99.2 ± 6.8 |
8.9 | na | na | 460.4 ± 9.6 |
9.3 |
| R17 (27) | v, u, h | 324.7 ± 8.8 |
7.9 | 115.7 ± 4.3 |
7.7 | 979.8 ± 40.7 |
15.5 | 94.8 ± 6.3 |
9.0 | na | na | 535.3 ± 8.7 |
10.9 |
| Average flux (R17) |
301.0 ± 8.7 |
6.8 | 108.0 ± 4.0 |
7.3 | 1049.8 ± 46.3 |
15.6 | 96.5 ± 6.5 |
8.7 | 826.2† | 10.2† | 493.3 ± 9.1 |
10.0 | |
| H16 (26) | v, u, h | 275.0 ± 9.8 |
6.5 | 69.1 ± 3.6 |
3.8 | 601.4 ± 28.3 |
8.1 | 69.6 ± 4.9 |
6.0 | na | na | 167.0 ± 4.5 |
3.4 |
| RC01 (54) | u | 385.0 ± 13.8 |
9.2 | 93.5 ± 4.9 |
5.0 | 474.7 ± 17.1 |
8.1 | 74.8 ± 5.1 |
7.1 | 375.2 ± 8.7 |
4.7 | 224.0 ± 5.8 |
4.6 |
| B04 (55) | v, u, h | 623.2 ± 18.0 |
14.7 | 187.4 ± 7.8 |
10.9 | 1542.7 ± 75.7 |
19.3 | 191 ± 13.2 |
15.6 | na | na | 494.7 ± 10.1 |
10.2 |
*Current velocity (v) in cm s−1, water depth (h) in m, and wind speed (u) in m s−1.
†Calculated based on the % difference of RC01 and average R17 in the JR dry season.