Articles | Volume 9, issue 10
Geosci. Model Dev., 9, 3517–3531, 2016
https://doi.org/10.5194/gmd-9-3517-2016
Geosci. Model Dev., 9, 3517–3531, 2016
https://doi.org/10.5194/gmd-9-3517-2016

Model description paper 30 Sep 2016

Model description paper | 30 Sep 2016

Astronomical component estimation (ACE v.1) by time-variant sinusoidal modeling

Matthias Sinnesael et al.

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Classical spectral analysis often relies on methods based on (Fast) Fourier Transformation. This technique has no unique solution separating variations in amplitude and frequency. This drawback is circumvented by using a polynomial approach (ACE v.1 model) to estimate instantaneous amplitude and frequency in orbital components. The model is illustrated and validated using a synthetic insolation signal and tested on two case studies: a benthic δ18O record and a magnetic susceptibility record.