Burial Lake, Alaska 37,000 Year Geochemical Data Finkenbinder, M.S.; Abbott, M.B.; Finney, B.P.; Stoner, J.S.; Dorfman, J.M. Finkenbinder, M.S. Abbott, M.B. Finney, B.P. Stoner, J.S. Dorfman, J.M. earth science/paleoclimate/paleolimnology (age,null,95% confidence interval upper bound,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (organic carbon,sediment,null,weight percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,null,N,x10-5 units) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (organic matter,sediment,null,percent,null,paleolimnology,null,loss on ignition,N,550 degrees C) earth science/paleoclimate/paleolimnology (biogenic silica,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (sedimentation rate,null,null,centimeter per year,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (titanium,sediment,null,count per second,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (delta 15N,organic matter,null,per mil AIR,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,null,N,total organic carbon/total nitrogen) earth science/paleoclimate/paleolimnology (silicon,sediment,null,count per second,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (nitrogen,organic matter,null,weight percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,one standard deviation lower bound,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,95% confidence interval lower bound,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (density,dry sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (silicon/titanium,sediment,null,dimensionless,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (incoherent:coherent scattering,sediment,null,dimensionless,null,paleolimnology,null,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (delta 13C,organic matter,null,per mil VPDB,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (age,null,one standard deviation upper bound,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (silicon,sediment,null,count per second,null,paleolimnology,normalized,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology (silicon/titanium,sediment,null,dimensionless,null,paleolimnology,normalized,energy-dispersive x-ray fluorescence spectroscopy,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Burial Lake>LATITUDE 68.43>LONGITUDE -159.17) Sediment cores from Burial Lake located in the western Brooks Range in Arctic Alaska record paleoenvironmental changes that span the last 37,000 calendar years before present (cal yr BP). We identified four distinct lithologic subunits based on physical properties (dry bulk density, magnetic susceptibility), sediment composition, and geochemical proxies (organic matter, biogenic silica, C/N, organic matter d13C and d15N, and elemental data from scanning X-ray fluorescence). The multi-proxy approach and relatively high temporal resolution (at multi-decadal to centennial time scales) of our proxy analysis, compared with previous studies of intermediate water depth cores from Burial Lake, provide new insights into the paleoenvironmental history of the region spanning the period prior to the Last Glacial Maximum. Relatively high lake-levels and gradually decreasing in-lake and terrestrial productivity occur during the mid-Wisconsin interstadial from 37,200 to 29,600 cal yr BP. The subsequent period is defined by falling and lower lake-levels with decreasing effective-moisture, windier conditions, and sustained low aquatic productivity throughout the LGM between 29,600 and 19,600 cal yr BP. The last deglaciation that commenced by 19,600 cal yr BP is characterized by gradual changes in several sediment physical and geochemical proxies, including increasing C/N ratios and terrestrial productivity, decreasing magnetic susceptibility and clastic sediment flux, along with rising and relatively higher lake-levels. A decrease in aeolian activity after 16,500 cal yr BP is inferred from the appearance of fine (very fine sandy silt) sediment, compared to coarse sediments through the LGM and last deglaciation. The highest levels of terrestrial inputs along with increasing and variable aquatic productivity occur during the Lateglacial to early Holocene interval between 16,500 and 8800 cal yr BP. The absence of multi-proxy evidence for a strong climatic reversal during the Younger Dryas from Burial Lake sediments contrasts with some paleorecords showing cooler temperatures and/or dry conditions in northern Alaska at this time. Peak levels of sediment organic content and terrestrial productivity at Burial Lake between 10,500 and 9900 cal yr BP coincide with the early Holocene summer insolation maxima, which likely represents summertime warming and an enhanced flux of watershed derived organic matter from permafrost degradation. The remainder of the Holocene (since 8800 cal yr BP) at Burial Lake is characterized by relatively high and stable lake levels, landscape stabilization, and relatively high and variable levels of aquatic productivity. STUDY NOTES: Geochemical data from Burial Lake, Alaska for the last 37,000 cal yr BP. Data include dry bulk density, percent organic matter, percent biogenic silica, magnetic susceptibility, carbon to nitrogen (C/N) mass ratios, bulk sediment organic matter carbon (d13C) and nitrogen (d15N) isotopes, and elemental abundances from scanning XRF analysis. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Finkenbinder, M.S. Investigator : Abbott, M.B. Investigator : Finney, B.P. Investigator : Stoner, J.S. Investigator : Dorfman, J.M. 2015-09-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19240 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015scat.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015dbdloi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015agestd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015bsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015org.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015scat.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015dbdloi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015agestd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015bsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015org.txt English https://www.ncdc.noaa.gov/paleo/study/19240 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015scat.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015dbdloi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015agestd.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015age.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015bsi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015xrf.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015org.txt M.S. Finkenbinder, M.B. Abbott, B.P. Finney, J.S. Stoner, J.M. Dorfman2015A multi-proxy reconstruction of environmental change spanning the last 37,000 years from Burial Lake, Arctic AlaskaQuaternary Science Reviews126227-24110.1016/j.quascirev.2015.08.031http://www.sciencedirect.com/science/article/pii/S0277379115300974 START YEAR: 37215 cal yr BP * END YEAR: -60 cal yr BP -159.17 68.43 -159.17 68.43