A Comparison of Three Gap Filling Techniques for Eddy Covariance Net Carbon Fluxes in Short Vegetation Ecosystems

Table 5

The sum relative error (SRE) for NEE in different gap levels, at marsh, rice, and soybean site.

	Gap %	Daytime			Nighttime ( corrected)			All time
		MDV %	LUT %	NLR %	MDV %	LUT %	NLR %	MDV %	LUT %	NLR %
Marsh site	35	2.83	0.85	4.92	na^(a)	na	na	2.83	0.85	4.92
	45	−3.61	0.15	−0.70	2.51	1.36	0.83	−4.46	−0.02	−0.92
	55	−4.98	−3.60	−2.33	−1.46	2.54	2.49	−5.93	−5.23	−3.67
	65	−1.74	0.82	3.48	4.60	5.50	6.11	−3.67	−0.61	2.66
Rice site	35	0.05	3.37	2.28	4.38	2.84	2.43	−0.28	3.41	2.27
	45	0.08	−0.81	−1.59	3.97	−2.27	1.79	−0.33	−0.66	−1.94
	55	0.58	1.38	2.73	−5.67	−1.38	0.60	1.52	1.79	3.05
	65	−1.40	−4.89	−5.68	−0.69	1.29	0.08	−1.51	−5.86	−6.59
Soybean site	35	2.21	−1.67	7.01	−22.99	−9.94	−9.28	5.16	−0.37	9.58
	45	1.82	−1.75	2.20	1.57	4.09	2.94	1.92	−4.04	1.91
	55	5.80	3.56	10.48	1.47	0.16	1.02	8.49	5.67	16.36
	65	1.74	1.97	10.11	−2.88	0.27	−2.29	4.93	3.6	20.28

No measurements were available due to large gaps.