A spectral analysis of biosphere-atmosphere trace gas flux densities and meteorological variables across hour to multi-year time scales

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Statistical properties of random CO2 flux measurement uncertainty inferred from model residuals (2008, methodology): “Previous frequency domain analyses have made use of orthonormal wavelet transformations (e.g., Katul et al., 2001) and Fourier analysis (e.g., Baldocchi et al., 2001a).”
‘Breathing’ of the terrestrial biosphere: lessons learned from a global network of carbon dioxide flux measurement systems (2008, background): “And a global network of collaborating regional networks, FLUXNET, began in 1997 (Baldocchi et al. 2001a).”
FLUXNET: A New Tool to Study the Temporal and Spatial Variability of Ecosystem-Scale Carbon Dioxide, Water Vapor, and Energy Flux Densities (2001, unknown): “Application of Fourier transforms to year-long and multi-year flux measurement records provides a means of quantifying the time scales of flux variance (Baldocchi et al., 2001).”
Comprehensive comparison of gap-filling techniques for eddy covariance net carbon fluxes (2007, background): “Several hundred flux tower sites have been established around the world (Baldocchi et al., 2001a), recording CO2 flux, energy and momentum flux, storage change of CO2 in the canopy air layer, and meteorological variables including global radiation (Rg), photosynthetic photon flux density (PPFD),…”