Tree Ring

All data in the World Data Center for Paleoclimatology archive are contributed by research scientists. Contributors and references are available in readme or data file headers. Here is a Sample Data Citation.

The International Tree-Ring Data Bank is maintained by the NOAA Paleoclimatology Program and World Data Center for Paleoclimatology. The Data Bank includes raw ring width or wood density measurements, and site chronologies (growth indices for a site). Tree-ring measurement series from other parameters are welcome as well. Reconstructed climate parameters, including North American Drought, are also available for some areas. Over 2000 sites on six continents are included.

WebMapper

(Click on a region of the map)

Contributing Data

Obtaining Data at the WDC

• Tree Ring Search Engine (Download data archived before April 2004)
• Download Recent Tree Ring Data (Contributions since April 1, 2004)
• ArcIMS GIS interface for Windows or Macintosh. Browse, query, and download data from an interactive map.
• WSL Birmensdorf Worldwide Ringwidth and Density Data
  Nearly 500 Sites contributed to the ITRDB by Dr. Fritz Schweingruber, available in several formats. These data are included in above listings in decadal format.
• North American Drought
• Reconstructed Climate Parameters
• International Multiproxy Paleofire Database (IMPD)

Software

• Dendrochronology Program Library
• Introduction to Crossdating created by Dr. Paul Sheppard of the Laboratory of Tree-Ring Research

Notes

• File Formats and Terms
• Update history of the ITRDB
• COFECHA Output
• ITRDB Species Codes by Henri D. Grissino-Mayer

Other Tree Ring Sources

• University of Arizona Laboratory of Tree-Ring Research
• Cornell University Aegean Dendrochronology Project
• Dendrochronology Species Database
• Bibliography of Dendrochronology
• Multilingual Glossary of Dendrochronology
• Henri D. Grissino-Mayer's Ultimate Web Pages for Tree Rings and Tree-Ring Research
• Tree Ring FAQ
• Tom Levanic's Euro Catalogue (Searchable Database of European Tree Ring Chronologies)