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

gp.dbh {dplR} | R Documentation

## 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` – 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)

### 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.

### Source

DendroLab, University of Nevada Reno, USA. http://dendrolab.org/

### 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), 81–96.

[Package dplR version 1.7.1 Index]