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Tree ring width measurements from Gunisao Lake in Manitoba, Canada provide a 92-year climate proxy record. The NOAA National Centers for Environmental Information archives this data, which covers the period from 54 to -38 calendar years before present. This Paleoclimatology study was last updated in 1988.
Time values are in calendar years before present (BP), where present is defined as 1950 CE; negative values indicate years after 1950. Users must cite the study.