Since cross-dating depends on matching the high-frequency elements of a sample against a master chronology, various methods are explored for removing the low-frequency variance in ring-width series before they are compared.
The results show that a range of such “pre-whitening” methods can usefully be employed, and no single method is universally superior.
For each core that we have, we need to gain a high confidence in the actual date that we assign to each ring.
Unfortunately, any given tree may sometimes have a missing ring or a false ring present and therefore every ring we count thereafter is thrown off by one or two years.
This paper defines and illustrates crossdating, an initial process in dendrochronology or tree-ring work by which accurate ring chronologies may be built for dating purposes, for climatic information, or for certain ecological problems.