R: Ponderosa Pine Distance to Pith Corresponding to 'gp.rwl'

gp.d2pith {dplR} | R Documentation

## Ponderosa Pine Distance to Pith Corresponding to `gp.rwl`

### Description

This data set gives the distance to pith for each series (in mm) that matches the ring widths for `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.d2pith)

### Format

A `data.frame` containing series IDs in column 1 (`series`) and the distance (in mm) from the innermost ring to the pith of the tree (`d2pith`). This can be used together with the ring widths to calculate the area of each ring.

### Source

DendroLab, University of Nevada Reno, USA. https://dendrolaborg.wordpress.com/

### 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 1.7.2 Index]