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168 tree-ring width measurements from the Khadyta River region in Russia, spanning 208 years from 168 to -40 calendar years before present. This paleoclimatology dataset was archived by NOAA's National Centers for Environmental Information under the World Data Service. The data collection was last updated in 1990.
Time values are in calendar years before present (BP), where 'present' is conventionally 1950 CE, requiring conversion for comparison with Common Era dates. Users must cite the original study per NOAA requirements.