Cross dating for dendrochronology
His is a peculiar, even singular, straw-man argument.
There isn’t anything very threatening in dendrochronology to a young earth theory. Hoehn there are problems when you try to date things too precisely using the Bible.
Skeleton plotting is a bit of an acquired skill, and there is certainly some art to it.
Fortunately, Paul Sheppard has produced an awesome web site that explains the concept of crossdating tree rings and provides an inter-active tutorial for you to practice on to learn the skill.
Please consult Field Methods for a detailed description of the field equipment, including its use and care, and the actual methods of core collection and preservation. The cores should next be mounted and glued in to increment core holders and then the surface prepared for study following the protocols outlined in Lab Methods.
Following surface preparation, you can begin the process of crossdating.
However, we can look for certain years that offer good "signals" (very thin or very wide rings) and identify them in each core and confirm they occur at the year they should in each core.
Within the file, I suggest forming a separate worksheet for each core.
Counting trees is fundamental metrics in the science of forestry. Scientifically, they have been doing it for over one-hundred years.
The tremendous discrepancy between the old count of 400 billion and the new number, three trillion, begs for an explanation. For those of us who want numbers we can trust, studies like Thomas Crowther’s are unnerving.
How could we be so wrong about something so doable as a census, an estimation, of the living trees on earth? You have to do field checking to verify your estimates from satellite imagery. You have to be rigorous in correlating the images to appropriate field inventories. If the simplest numbers, concerning the simplest knowables, are proven to be not even close, the totals become a huge caveat about the scientific method itself.
Atmospheric carbon dioxide has been news lately as causing Anthropogenic Global Warming. Reproduced below are two excerpts from the 3 September 2015 Yale press release announcing the completion of Crowther’s research: …But the total number of trees has plummeted by roughly 46% since the start of human civilization, the study estimates.