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878 to 41 BCE tree ring width chronology from Alberta, Canada, providing a proxy for historical climate conditions. The dataset is part of the NOAA NCEI Paleoclimatology archive and was last updated in 1991. It was contributed by researcher Schweingruber under the International Tree-Ring Data Bank program.
Time notation uses 'calendar years before present (BP)', where 0 BP is conventionally 1950 CE; requires conversion for standard analysis. Citation of the original study is required when using the data.