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A tree ring chronology dataset from Gunisao Lake in Manitoba, Canada, archived by the NOAA National Centers for Environmental Information. It provides paleoclimate proxy data covering the period from 131 to -38 calendar years before present (BP). The data was contributed by Schweingruber and last updated in the NOAA system in 1988.
Users must cite the study when using the data, as specified by the archive. The calendar years before present (BP) notation requires understanding of the dating convention (where present is typically 1950 CE).