publication . Article . Preprint . Other literature type . 2017

Tune in on 11.57 µHz and listen to primary production

T. J. S. Cox; T. J. S. Cox; J. E. E. van Beusekom; K. Soetaert;
Open Access English
  • Published: 01 Jan 2017
  • Country: Netherlands
In this paper we present an elegant approach to reconstruct slowly varying gross primary production (GPP) as a function of time, based on O<sub>2</sub> time series. The approach, called complex demodulation, is based on a direct analogy with amplitude-modulated (AM) radio signals. The O<sub>2</sub> concentrations oscillating at the diel frequency (or 11.57 µHz) can be seen as a <q>carrier wave</q>, while the time variation in the amplitude of this carrier wave is related to the time-varying GPP. The relation follows from an analysis in the frequency domain of the governing equations of O<sub>2</sub> dynamics. After the theoretical derivation, we assess the perfo...
free text keywords: Ecology, QH540-549.5, Life, QH501-531, Geology, QE1-996.5, Earth-Surface Processes, Ecology, Evolution, Behavior and Systematics

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