wa082: Hurricane Ridge, Pacific silver fir

In dplR: Dendrochronology Program Library in R

Hurricane Ridge, Pacific silver fir

Description

This data set gives the raw ring widths for Pacific silver fir Abies amabilis at Hurricane Ridge in Washington, USA. There are 23 series. Data set was created using read.rwl and saved to an .rda file using save.

The source file records no measurement for series 712011 in the year 1900, holding the value -999 there. This data set was built before read.tucson distinguished a missing measurement from a ring width of zero, and that cell holds a zero. It has been left as it is for continuity with earlier versions of dplR. Reading the source file today gives NA in that cell; passing fill.internal.NA = 0 to read.tucson reproduces this data set exactly.

Usage

data(wa082)

Format

A data.frame containing 23 tree-ring series in columns and 286 years in rows.

Source

International tree-ring data bank, Accessed on 20-April-2021 at https://www.ncei.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/wa082.rwl

References

Schweingruber, F. (1983) Hurricane Ridge Data Set. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series 1983-wa082.RWL. NOAA/NCDC Paleoclimatology Program, Boulder, Colorado, USA.

Examples

library(utils)
data(wa082)

## Where the data came from. read.tucson() records what it saw and attaches
## it to what it returns; this data set carries that record.
prov <- attr(wa082, "dplR.provenance")
prov$file
prov$header

## The file records no measurement for series 712011 in 1900, holding -999
## there. This data set was built with fill.internal.NA = 0, so that cell
## holds a zero. See the description above.
prov$gaps
wa082["1900", "712011"]

## rwl.report() shows the same in its header
rwl.report(wa082)

dplR documentation built on Oct. 1, 2026, 9:07 a.m.