Arolik and Ongoke Lake, Alaska 16-10KYrBP Biogenic Silica Data Hu, F.S.; Nelson, D.E.; Clarke, G.H.; Ruhland, K.M.; Huang, Y.; Kaufman, D.S.; Smol, J.P. Hu, F.S. Nelson, D.E. Clarke, G.H. Ruhland, K.M. Huang, Y. Kaufman, D.S. Smol, J.P. earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,milligram per gram,null,paleolimnology,null,spectrophotometry,N,size fraction: 0.42-2 mm; Mortlock and Froelich 1989 with 10% Na2CO3) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (Arolik Lake>LATITUDE 59.967>LONGITUDE -161.116) Evidence is mounting that abrupt climatic shifts occurred during the last glacial-interglacial transition (LGIT) in the North Atlantic and other regions. However, few high-resolution climatic records of the LGIT exist from the high latitudes of the North Pacific rim. We analyzed lakesediments from southwestern Alaska for biogenic silica,organic carbon, organic nitrogen, diatom assemblages, and compound-specific hydrogen isotopes. Results revealclimatic changes coincident with the Younger Dryas, Intra-Allerød Cold Period, and Pre-Boreal Oscillation. However,major discrepancies exist in the paleoclimate patterns of the Bølling-Allerød interstadial between our data and the GISP2 d18O record from Greenland, and causes are uncertain. These data suggest that the North Pacific and North Atlanticexperienced similar reversals during climatic warming of theLGIT but that the Bølling-Allerød cooling trend in the GISP2d18O record is probably not a hemispheric or global pattern. STUDY NOTES: Raw biogenic silica measurements from Arolik and Ongoke Lake sediments, spanning ~16,000 to 10,500 calendar year BP. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hu, F.S. Investigator : Nelson, D.E. Investigator : Clarke, G.H. Investigator : Ruhland, K.M. Investigator : Huang, Y. Investigator : Kaufman, D.S. Investigator : Smol, J.P. 2009-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/8646 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.txt English https://www.ncdc.noaa.gov/paleo/study/8646 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/arolik-ongoke2006.txt Hu, F.S., Nelson, D.E., Clarke, G.H., Ruhland, K.M., Huang, Y., Kaufman, D.S., Smol, J.P. 2006. Abrupt climatic events during the last glacial-interglacial transition in Alaska. Geophysical Research Letters, 33, L18708. START YEAR: 16045 cal yr BP * END YEAR: 10425 cal yr BP -161.116 59.967 -161.116 59.967