Napaktok Bay Spruce Tree Ring Chronology from 400 to 46 BCE

Tree ring width measurements from spruce trees in Napaktok Bay, Canada, provide a 446-year climate proxy record. The data covers the period from 400 to 46 calendar years before present. It was archived by NOAA's World Data Service for Paleoclimatology and last updated in 1996.

Use Cases

• Calibrating tree ring width series against instrumental climate data to reconstruct past temperature or precipitation. Analyzing growth anomalies in the chronology to identify volcanic eruption events or extreme climate years. Comparing the Napaktok Bay chronology with other ITRDB series to study spatial climate patterns across Canada. Using the dated ring widths as a benchmark for cross-dating other boreal forest tree core samples.

Strengths

• Covers a continuous 446-year period from 400 to 46 BCE.
• Part of the International Tree Ring Data Bank (ITRDB), a standardized global archive.

Limitations

• Temporal coverage ends 46 years BP, lacking overlap with the modern instrumental period for direct calibration.
• Data last updated in 1996, potentially missing methodological refinements or expanded metadata.
• Single geographic site (Napaktok Bay) limits representativeness for regional analysis.

Provenance

Source

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

Collection Method

Tree ring cores collected and measured using dendrochronological techniques.

Time Range

400 to -46 calendar years before present (BP).

Freshness

null

Geography

Napaktok Bay, Canada.