dendrochronology

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dendrochronology

the study of ANNUAL RINGS in timber to calculate the age of the tree (often very precisely) and the climatic situation at the time of growth.
References in periodicals archive ?
It can be seen that the AE ring count rate is corresponding to rock stress-strain curves at various temperatures.
The measurement of settlement age was based on the pre-settlement ring count (+ 2 days), and size at settlement was based on the otolith radius to somatic length regression from measured standard length.
The maximum difference in number of rings along the three radii in the disc samples was large in the lower part of the stem (Table 2): at 1.7m ring counts differed by 14 in tree 1, by 5 in tree 2 and by 7 in tree 3, while at the top (18.7m) it varied only by 1 ring in tree 1, none in tree 2 and 2 in tree 3.
However, mean fire-free interval calculated from records [greater than]150 yr long (as determined by total ring count for fire scarred trees or total ring count + MRFFP for fire scarred stumps) [TABULAR DATA FOR TABLE 2 OMITTED] can be combined with corresponding mean patch sizes (Table 1) to derive a reliable estimate of pre-1910 fire occurrence rates within those patches (fires/time/area).
In the subsequent analysis that assumed homogenous slopes, we found that ring count was positively correlated with standard length ([F.sub.1,79] = 362.31, P c 0.0001) and accounted for 72% of the total variation.
With the increasing waste concrete content, the ring count peak intensity and frequency increase during the yield point stress and peak strength stage caused by the crack cut-through between the paste and waste concrete and between the paste and gangue.
As suggested by Geffen (1992), fish age was determined by adding 10 days to each daily ring count to compensate for the posthatching yolk stage that precedes daily ring formation in certain species.
The impacts on drying behavior of basic density, initial moisture content, percentage and position of heartwood, ring count, rings from the pith, growth ring angle, and earlywood and latewood coverage on board faces were investigated for western hemlock (Tsuga heterophylla) lumber.
Knot area, ring count, ring angle, initial MC, and heartwood percentage were measured for each board but not included in the final correlation.
If the two ring counts differed, the section was read again, and if the third ring count differed from the previous two ring counts, the spine was considered unreadable and discarded.
"I'm the biggest sandpaper snob in the world," Copenheaver says, adding that she sands with finer and finer grade sandpaper, until she winds up with "a polish on the wood you wouldn't believe," making possible a ring count that's "absolutely perfect."
The distribution of species, timber quality, and aesthetically important growth characteristics (ring count, color, consistency of ring count, roundness of bole, etc.) varies within and among regions.