Glacial Lake Hitchcock Varve Thickness Data Rittenour, T.M. Rittenour, T.M. earth science/paleoclimate/paleolimnology (varve thickness,null,null,dimensionless,null,paleolimnology,composited|filtered,null,N,The continuous chronology has been obtained (as described in Rittenour et al Science 2000) by (1) log-normal transformation to yield roughly Gaussian distribution (2) high-pass filtering of non-climatic influences (timescales longer than 200 years) which represent variation in deposition due to change from ice-proximal to ice-distal environment of glacial lake following migration of Laurentide ice sheet) of constituent segments (3) standardization of constituent segments and (4) merging of constituent segments after verifying the significance of correlations in the overlap intervalbetween different segments) earth science/paleoclimate/paleolimnology (notes,null,null,count,null,paleolimnology,null,null,N,continuous floating varve chronology; year 1 is oldest) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Glacial Lake Hitchcock>LATITUDE 41.72>LONGITUDE -72.73) A glacial varve chronology from New England spanning the 4000-year period from 17,500 to 13,500 calendar years before the present was analyzed for evidence of climate variability during the late Pleistocene. The chronology shows a distinct interannual (3 to 5 years) band of enhanced variability suggestive of El Niņo-Southern Oscillation (ENSO) teleconnections into North America during the late Pleistocene, when the Laurentide ice sheet was near its maximum extent and climatic boundary conditions were different than those of today. This interannual variability largely disappears by the young end of the 4000-year chronology, with only the highest frequency components (roughly 3-year period) persisting. This record provides evidence of ENSO-like climate variability during near-peak glacial conditions. STUDY NOTES: The 4022 year continuous annual chronology is roughly dated between 17.5 and 13.5 kyr before present, in calibrated radiocarbon years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Rittenour, T.M. 2000-06-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5480 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/readme_rittenour2000.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/hitchcock_varve.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/readme_rittenour2000.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/hitchcock_varve.txt English https://www.ncdc.noaa.gov/paleo/study/5480 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/readme_rittenour2000.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/newengland/glacial_lake_hitchcock/hitchcock_varve.txt Rittenour, T.M.. 2000. El Nino-like Climate Teleconnections in New England During the Late Pleistocene. Science Vol. 288, pp. 1039-1042, 12 May 2000 START YEAR: 17450 cal yr BP * END YEAR: 13450 cal yr BP -72.73 41.72 -72.73 41.72