Jellybean Lake, Yukon 7,500 Year Stable Isotope Data Anderson, L.; Abbott, M.B.; Finney, B.P.; Burns, S.J. Anderson, L. Abbott, M.B. Finney, B.P. Burns, S.J. earth science/paleoclimate/paleolimnology (delta 13C,calcium carbonate,null,per mil VPDB,null,paleolimnology,null,null,N,pure micrite (calcite)) earth science/paleoclimate/paleolimnology (delta 18O,calcium carbonate,null,per mil VPDB,null,paleolimnology,null,null,N,pure micrite (calcite)) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (notes,null,null,null,null,paleolimnology,null,null,C,null) earth science/paleoclimate/paleolimnology (delta 18O,calcium carbonate,null,per mil VPDB,null,paleolimnology,anomalized,null,N,pure micrite (calcite); anomalized from overall series mean of -19.6 per mil VPDB) earth science/paleoclimate/paleolimnology (age,null,null,radiocarbon year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (Jellybean Lake>LATITUDE 60.35>LONGITUDE -134.8) Analyses of sediment cores from Jellybean Lake, a small, evaporation-insensitive groundwater-fed lake, provide a record of changes in North Pacific atmospheric circulation for the last ~7500 yr at 5- to 30-yr resolution. Isotope hydrology data from the southern Yukon indicate that the oxygen isotope composition of water from Jellybean Lake reflects the composition of mean-annual precipitation, d18Op. Recent changes in the d18O of Jellybean sedimentary calcite (d18Oca) correspond to changes in the North Pacific Index (NPI), a measure of the intensity and position of the Aleutian Low (AL) pressure system. This suggests that d18Op variability was related to the degree of fractionation during moisture transport from the Gulf of Alaska across the St. Elias Mountains and that Holocene shifts were controlled by the intensity and position of the AL. Following this model, between ~7500 and 4500 cal yr B.P., long-term trends suggest a predominantly weaker and/or westward AL. Between ~4500 and 3000 cal yr B.P. the AL shifted eastward or intensified before shifting westward or weakening between ~3000 and 2000 cal yr B.P. Rapid shifts eastward and/or intensification occurred ~1200 and 300 cal yr B.P. Holocene changes in North Pacific atmospheric circulation inferred from Jellybean Lake oxygen isotopes correspond with late Holocene glacial advances in the St. Elias Mountains, changes in North Pacific salmon abundance, and shifts in atmospheric circulation over the Beaufort Sea. STUDY NOTES: Jellybean Lake, Yukon Territory, Canada stable isotope data. Carbon and oxygen isotope ratios (per mil VPDB) of bulk sediment (pure micrite) calcite. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Anderson, L. Investigator : Abbott, M.B. Investigator : Finney, B.P. Investigator : Burns, S.J. 2006-01-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5445 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.xls English https://www.ncdc.noaa.gov/paleo/study/5445 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/yukon/jellybean2005.xls Anderson, L., M.B. Abbott, B.P. Finney, S.J. Burns. 2005. Regional atmospheric circulation change in the North Pacific during the Holocene inferred from lacustrine carbonate oxygen isotopes, Yukon Territory, Canada. Quaternary Research Vol. 64, pp. 21-35 START YEAR: 7556 cal yr BP * END YEAR: -52 cal yr BP -134.8 60.35 -134.8 60.35