dplR (version 1.7.0)

gp.dbh: Ponderosa Pine Stem Diameters and Bark Thickness (gp.rwl)

Description

This data set gives the diameter at breast height for each series that matches the series in gp.rwl <U+2013> a data set of ponderosa pine (Pinus ponderosa) from the Gus Pearson Natural Area (GPNA) in northern Arizona, USA. Data are further described by Biondi and Qeadan (2008) and references therein.

Usage

data(gp.dbh)

Arguments

Format

A data.frame containing series IDs in column 1 (series), tree diameter (in cm) at breast height (dbh), and the bark thickness (in cm). This can be used together with the ring widths to calculate the area of each ring.

References

Biondi, F. and Qeadan, F. (2008) A theory-driven approach to tree-ring standardization: Defining the biological trend from expected basal area increment. Tree-Ring Research, 64(2), 81<U+2013>96.