Tree ring width data from a below-treeline site at Twelvemile Summit, Alaska, covering the period from 211 to -46 calendar years before present. The dataset was archived by NOAA's National Centers for Environmental Information under its Paleoclimatology program. It was last updated in the repository in 1996.
Use Cases
- Reconstruct past temperature or precipitation anomalies by analyzing annual tree-ring width variations.
- Calibrate climate models using a precisely dated proxy record for the late Holocene period in Alaska.
- Study ecological resilience and growth patterns of tree species at the Alaskan treeline over a 257-year period.
Strengths
- Provides a continuous, annually resolved proxy climate record spanning 257 years.
- Data is curated and archived by the authoritative NOAA World Data Service for Paleoclimatology.
Limitations
- Temporal coverage ends at 46 BC, making it unsuitable for analyzing recent climate change.
- Data is from a single geographic site (Twelvemile Summit, Alaska), limiting spatial representativeness.
- The repository record has not been updated since 1996, potentially indicating outdated metadata or access methods.
Provenance
- Source
- NOAA National Centers for Environmental Information (NCEI) World Data Service for Paleoclimatology.
- Collection Method
- Tree ring sampling and measurement (dendrochronology).
- Time Range
- 211 to -46 calendar years before present (BP).
- Freshness
- null
- Geography
- Twelvemile Summit, Alaska, United States of America.