Columbia River Tree Ring Chronology from 659 to 259 BCE

Tree ring width measurements from snags in the Columbia and Grays River basins provide a 400-year climate proxy record. NOAA's National Centers for Environmental Information archives this dendrochronological study for paleoclimate research. The data covers the period from 659 to 259 calendar years before present.

Use Cases

• Reconstruct annual temperature or precipitation anomalies for the Pacific Northwest using the tree ring width time-series.
• Calibrate regional climate models by comparing the 400-year tree ring chronology with other paleoclimate proxies.
• Analyze growth suppression events within the ring width record to date historical disturbances like fires or floods.
• Correlate the Washington State tree ring series with broader hemispheric climate indices to study teleconnections.

Strengths

• Time-series spans 400 consecutive years (659 to 259 BP), providing a substantial climate record.
• Data is curated and archived by NOAA's authoritative World Data Service for Paleoclimatology.

Limitations

• Sample size and replication (number of tree cores) are unknown, affecting statistical confidence.
• Geographic coverage is limited to specific sites in the Columbia/Grays River basins, not representative of the entire region.
• The most recent data point is from 259 years BP, leaving a large gap to the present day for modern climate comparison.

Provenance

Source

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

Collection Method

Dendrochronological analysis of tree ring widths from snags (dead standing trees).

Time Range

659 to 259 calendar years before present (BP).

Freshness

null

Geography

Washington, United States Of America, specifically Columbia River and Grays River basins.