Robust estimation of background noise and signal detection in climatic time series

  title={Robust estimation of background noise and signal detection in climatic time series},
  author={Michael Everett Mann and Jonathan M. Lees},
  journal={Climatic Change},
We present a new technique for isolating climate signals in time series with a characteristic ‘red’ noise background which arises from temporal persistence. This background is estimated by a ‘robust’ procedure that, unlike conventional techniques, is largely unbiased by the presence of signals immersed in the noise. Making use of multiple-taper spectral analysis methods, the technique further provides for a distinction between purely harmonic (periodic) signals, and broader-band (‘quasiperiodic… Expand

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