RedFit
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Scan day: 03 March 2014 UTC
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Description: Fortran 90 code by Michael Schulz and Manfred Mudelsee to estimate red-noise spectra directly from unevenly spaced time series, without requiring interpolation.
Free Software - World Data Center for Paleoclimatology REDFIT software estimates red-noise spectra directly from unevenly spaced time series, without requiring interpolation. Spectra of paleoclimatic time series commonly show a continuous decrease of spectral amplitude with increasing frequency ("red-noise"). A first-order autoregressive process is often used as null hypothesis to assess whether or not the variability recorded in a time series is consistent with a stochastic origin of this type. Since most paleoclimatic time series are unevenly spaced, and the straightforward estimation of such red-noise background requires evenly spaced time series, some sort of interpolation is necessary. Unfortunately, interpolation results in a significant bias because it alters the estimated spectrum by enhancing the low-frequency components at the expense of high-frequency components. Hence, the estimated spectrum of an interpolated time series becomes too "red" compared to the true spectrum. To overcome this problem a Fortran 90 program for estimating red-noise spectra directly from unevenly spaced data has been developed.
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| Page title: | Free Software - World Data Center for Paleoclimatology |
| Keywords: | paleoclimatology, analysis software for paleoclimatology data, analysis software for paleo data |
| Description: | Paleoclimatology analysis softwares |
| IP-address: | 205.167.25.171 |
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