Alaskan Tree Ring Chronology for Paleoclimate Reconstruction

Tree ring width measurements from Alaskan Tsuga mertensiana trees provide a proxy climate record. The chronology covers 528 years, from 478 to -49 calendar years before present. The dataset was produced by the NOAA National Centers for Environmental Information and archived in 1999.

Use Cases

• Reconstruct past temperature or precipitation anomalies using the tree ring width time series as a proxy.
• Calibrate climate models by comparing simulated past climates against the high-resolution chronology.
• Analyze the frequency and severity of historical climate events like droughts or cold periods from ring width patterns.
• Study the growth response of Tsuga mertensiana to climate forcing over a 528-year period.

Strengths

• Chronology spans 528 calendar years, providing a multi-century climate record.
• Data is sourced from the authoritative NOAA NCEI World Data Service for Paleoclimatology.
• Focus on a single tree species (Tsuga mertensiana) in a specific Alaskan location reduces confounding ecological factors.

Limitations

• The dataset's last update was in 1999, potentially lacking modern reanalysis or calibration.
• Geographic coverage is limited to a single site in Alaska, limiting regional generalizations.
• The raw sample depth (number of tree cores) is unknown, affecting confidence in early periods of the record.

Provenance

Source

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

Collection Method

Tree ring analysis (dendrochronology) of Tsuga mertensiana samples.

Time Range

478 to -49 calendar years before present (BP).

Freshness

null

Geography

Upper Nanatuk, Alaska, United States of America.