The Dated Master Dendrochronology

What is a dated master dendrochronology? See figure at right:
  • Constructed from previously crossdated samples
  • Is dated with calendar years, 1895 to 1926, in this case
  • Often hundreds – if not thousands – of years long
  • Time series of standardized growth indices
    • Average of 1.0, normal growth
    • Minimum of 0.0, below average to no growth
    • Maximum of 2.0, above average to great growth
  • Is marked as if it were a skeleton plot
    • Small indices represented by long marks hanging down (e.g., 1919)
    • Large indices represented by "b" marks (e.g., 1922 and 1926)
    • Average indices represented by no marks
dated master chronology

When you try skeleton plotting for yourself, the master chronology can be shown or hidden:
  • There will be a "Master" button, as on the right
    • Mouse click on it to hide or show the master
    • Hint #1: The graphs can be resized for easier viewing (see Relative Scale)
    • Hint #2: Move the master left or right by grabbing it anywhere with your mouse
show or hide master

Paul R. Sheppard
Laboratory of Tree-Ring Research, The University of Arizona
Tucson, Arizona 85721 USA
office: (520) 621-6474, fax: (520) 621-8229
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