Time-varying-response smoothing |
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| Authors: | Thomas M Melvin Keith R Briffa Kurt Nicolussi Michael Grabner |
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| Institution: | aClimate Research Unit, Department of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK;bInstitute of Geography, University of Innsbruck, Innrain 52, A-6020 Innsbruck, Austria;cBOKU—University of Natural Resources and Applied Life Sciences, Vienna |
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| Abstract: | Cubic smoothing splines with a fixed-period response are used widely in producing “expected” growth curves for ring-width and density data in dendroclimatology. A simple modification to the procedure which generates these splines enables the use of a smoothing spline with a user-specified, time-varying flexibility and hence time-varying-response characteristics. The revised procedure is presented here, along with different examples of its application in the context of Regional Curve Standardisation (RCS). The ability to generate a smoothing spline with time-dependent flexibility may have wider application in tree-ring studies. |
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| Keywords: | RCS method Smoothing spline Dendrochronology Standardisation |
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