Preserving the variance in imputed eddy-covariance measurements: Alternative methods for defensible gap filling

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• 作者：Sujit Kunwor^a ; Gregory Starr^a ; Henry W. Loescher^b ; ^c ; Christina L. Staudhammer^a ; ^{cstaudhammer@ua.edu}
• 关键词：Eddy covariance ; Net ecosystem exchange ; Gap-filling ; Variance preservation ; Parameter prediction ; Orthonormal wavelet transformation
• 刊名：Agricultural and Forest Meteorology
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：232
• 期：Complete
• 页码：635-649
• 全文大小：3932 K
• 卷排序：232

文摘

Variance structures in carbon flux measurements are dampened when gap-filling. Gap-filling methods that do not use static windows better preserve variance. Autocorrelation among gap-filled data is much higher than that of observed data. Multiple environmental variables should be included in gap-filling methods. Altered averaging times for measured NEE could help retain variance structures.