Settlement Point Tree Ring Chronology from Afognak Island

A 306-year tree-ring chronology from Afognak Island, Alaska, covering the period from 260 to -46 calendar years before present. This paleoclimatology dataset was archived by the NOAA National Centers for Environmental Information and is associated with their Tree Ring study type. The data was last updated in the NOAA system in 1996.

Use Cases

• Reconstruct past temperature or precipitation anomalies for the Gulf of Alaska region using the tree-ring width series.
• Calibrate the chronology against other proxy records using the provided calendar year BP time index.
• Analyze growth patterns and environmental stressors for the tree species sampled at the Settlement Point location.

Strengths

• 306-year temporal coverage provides a multi-century climate record.
• Data is curated and archived by the authoritative NOAA World Data Service for Paleoclimatology.

Limitations

• Temporal coverage ends at -46 BP (46 AD), making the record stale for recent climate studies.
• Sample size, species, and replication statistics are unknown from the provided metadata.
• The dataset has not been updated in the system since 1996, potentially lacking modern re-calibrations.

Provenance

Source

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

Collection Method

Tree ring analysis (dendrochronology).

Time Range

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

Freshness

Last updated in system: 1996-01-01.

Geography

Settlement Point, Afognak Island, Alaska, United States of America.