Stokes and smiley an introduction to tree ring dating automatic dating for love site
E., however this study clearly establishes the dendroclimatic potential of this tropical broadleaf species to carry out future tree–ring based long–term climate reconstruction in the sub-tropical Himalaya.
Chicago : University of Chicago Press Stokes, Marvin A.
The reconstruction shows that the intervals AD 1350–1420, 1475–1550, 1625–17–1940 characterized distinct periods of below-average June–July temperature followed by periods of above-average temperature.
Our reconstruction provides the first annually resolved insights into high-elevation climates spanning the Little Ice Age in this region and indicates that Little Ice Age moraine stabilization corresponds to persistent intervals of warmer-than-average temperatures.
Thirdly, this factor must vary in “intensity” over time and result in correlative variances in the width of the rings within the tree.
And, finally, these environmental factors must hold true over a large enough area to make extensive coring and study a worthwhile endeavor.
The observation of the tree–growth and climate relationship showed that optimum temperature, precipitation and soil moisture together serve to modulate the radial growth of Toon in the region, however the mean minimum temperature of winter season (October–February) is the most significant climatic factor.
Based on the expressed population signal (EPS) statistic, our record is reliable only back to 1945C.
Using a tree corer an individual removes a small section of the core of the tree, attempting to include in his or her sample the pith, or what would be the “center” of the ring structure in any given cross-section of the tree (Stokes and Smiley).
The sample, which is at this point a long, skinny, cylindrical sample, is transported to the laboratory for preparation.
Every organization has its own standards for transporting these cores, and at this point the US Forest Service slides the core samples into paper drinking straws in order to keep them in good shape between the time they are taken and the time that they are returned to the lab at the end of the day (Connie Millar, pers. Preparation techniques also vary from organization to organization, but the basic goals of any such preparation is to first, mount and preserve the sample, and second, make the tree-ring patterns visible.
This process involves plotting on a graph the intervals at which narrow rings occur in a given sample.
On every interval that a narrow ring occurs, a vertical line is drawn: the smaller the tree-ring, the longer the line one draws (Stokes and Smiley).