Cross dating for dendrochronology
All functions are customizable and designed with entry-level users of R in mind.Tellervo is an open source desktop application for measuring and curating dendro samples.Bootstrapping is performed to ensure robust estimates of confidence intervals.
The software uses over 2,400 tree-ring chronologies housed in the International Tree-Ring Data Bank and graphs out the chronology, the local climograph, and the "dendroclimograph" showing the monthly responses using correlations and bootstrapped confidence intervals.The package contains customizable functions to prepare, verify, process and plot dendrometer series, as well as functions that facilitate the analysis of dendrometer data (i.e.daily statistics or extracted cyclic phases) in relation to environmental data.The programs are too numerous to list individually here but connect to this web site and you'll see programs that are also able to extract and retrieve gridded climate data at various resolutions.You'll also find very useful programs not normally found in other dendro programs, such as routines to seasonalize climate data, conduct principle components regression, even plot and edit tree-ring data!(In Windows XP, note that the Absoft software must be installed in its own folder on the root hard drive while ARSTAN itself will install under Program Files.) The graphics are nothing short of superb and are almost overwhelming.One can easily capture the graphic from the Windows screen and easily paste it into any Windows program, such as Power Point of Word. Bernhard Knibbe (SCIEM) has created and is providing for free download a graphical interface for the popular quality-control computer program COFECHA.Select to save the file to your hard disk -- it helps to already have a folder on your hard disk named "DPL" where you can save these files. Next, you should read the brief descriptions for the different routines in this comprehensive suite of software, and be sure to read the disclaimer by Richard Holmes at the end of the file. I strongly recommend also downloading and unzipping the file "" You will then have text files that contain more comprehensive descriptions of these programs.These text files can be viewed with any word processor, such as Wordpad. Now, choose one of the files in the list below, and save it to your hard disk, perhaps in the folder named "DPL." 5.For years, the tree-ring lab at Columbia University has been at the forefront of producing high-quality and comprehensive programs for use by dendrochronologists, thanks to Ed Cook and Paul Krusic, especially.To further make these useful, they offer all programs in both OSX (for MACS) and Windows (for PCs) versions.