Time-varying-response smoothing

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• 作者：Thomas M. Melvin ; Keith R. Briffa ; Kurt Nicolussi ; Michael Grabner
• 关键词：RCS method ; Smoothing spline ; Dendrochronology ; Standardisation
• 刊名：Dendrochronologia
• 出版年：2007
• 出版时间：16 May 2007
• 年：2007
• 卷：25
• 期：1
• 页码：65-69
• 全文大小：213 K

文摘

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.