Research Article
A Comparison of Three Gap Filling Techniques for Eddy Covariance Net Carbon Fluxes in Short Vegetation Ecosystems
Table 4
Mean bias error of half-hourly
and standard deviation from the mean
(a).
| | Flux site |
Gap % | Day time | Night time ( corrected) | | MDV | LUT | NLR | | MDV | LUT | NLR | | mgCO2 m−2 s−1 |
mgCO2 m−2 s−1 |
| | Marsh site | 35 | 763 | −2.51 (79.04) | −0.75 (88.05) | −4.36 (73.46) | na(c) | na | na | na | | 45 | 1220 | 3.42 (73.26) | −0.14 (78.84) | 0.66 (69.65) | 161 | 2.21 (47.18) | 1.19 (34.85) | 0.73 (35.65) | | 55 | 1677 | 4.27 (78.65) | 3.09 (90.18) | 2.00 (78.88) | 359 | −1.26 (47.56) | 2.19 (35.97) | 2.16 (36.46) | | 65 | 2136 | 1.66 (84.39) | −0.78 (90.66) | −3.32 (74.42) | 532 | 4.14 (51.87) | 4.95 (41.49) | 5.49 (41.24) |
| | Rice site | 35 | 1084 | −0.10 (144.58) | −4.59 (154.58) | −7.17 (123.62) | 175 | 3.89 (53.96) | 2.52 (47.19) | 2.16 (46.24) | | 45 | 1565 | −0.17 (152.18) | 1.79 (165.22) | 3.5 (124.08) | 366 | 3.56 (54.27) | −2.04 (48.94) | 1.60 (42.13) | | 55 | 2045 | −1.14 (145.34) | −2.69 (168.33) | −5.33 (126.43) | 564 | −5.22 (58.38) | −1.27 (48.69) | 0.55 (40.58) | | 65 | 2525 | 2.76 (149.03) | 9.68 (160.66) | 11.25 (123.96) | 797 | −0.59 (57.99) | 1.11 (48.94) | 0.06 (41.25) |
| | Soybean site | 35 | 964 | −2.17 (115.52) | 1.64 (134.87) | −6.9 (114.04) | 136 | −21.8 (93.51) | −9.42 (44.1) | −8.8 (33.09) | | 45 | 1445 | −1.88 (114.98) | 1.81 (136.21) | −2.27 (113.32) | 345 | 1.91 (74.24) | 4.96 (46.71) | 3.57 (44.11) | | 55 | 1929 | −5.21 (112.73) | −3.2 (132.46) | −9.41 (110.09) | 569 | 1.72 (69.91) | 0.19 (45.55) | 1.19 (41.73) | | 65 | 2411 | −1.7 (112.09) | −2.05 (134.55) | −10.97 (109.28) | 732 | −3.26 (74.96) | 0.30 (47.45) | −2.59 (41.61) |
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Values in parentheses are standard deviation.
(b)Number of the artificial gaps.
(c)No measurements were available due to large gaps.
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