Eagle Point Douglas Fir Tree Ring Chronology from Washington

204-year tree ring chronology from Douglas Fir (Pseudotsuga menziesii) trees at Eagle Point, Washington, covering the period from 178 to -26 calendar years before present. The data is archived by NOAA National Centers for Environmental Information under its Paleoclimatology World Data Service. The study was published in 1976.

Use Cases

• Analyze annual tree-ring width variations to reconstruct past temperature or precipitation anomalies.
• Cross-date the chronology (WA036) with other regional tree-ring series to validate climate reconstructions.
• Calibrate the ring-width time-series against instrumental climate records for the period after -26 BP.
• Use the site-specific chronology to study local forest growth responses to historical climate events.

Strengths

• 204-year continuous time-series provides a multi-century climate record.
• Data is part of the authoritative International Tree Ring Data Bank (ITRDB) collection.

Limitations

• The data record ends at -26 BP (1976), lacking overlap with recent instrumental climate data.
• Sample size and number of individual trees used to build the chronology are unknown.
• Geographic coverage is limited to a single site (Eagle Point) in Washington.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI) World Data Service for Paleoclimatology.

Collection Method

Tree ring measurements from Douglas Fir (PSME) samples.

Time Range

178 to -26 calendar years before present (BP).

Freshness

null

Geography

Eagle Point, Washington, United States.