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NOAA's World Data Service for Paleoclimatology archives this tree ring chronology from the Jama River region in Russia. The dataset provides a 206-year record of tree growth parameters, covering the period from 162 to -44 calendar years before present. It was contributed by the Schweingruber research group and last updated in 1994.
Users must cite this study when using the data, as specified by the archive. The calendar year notation includes negative values for years before present, requiring careful interpretation.