noaa-lake-19240 Burial Lake, Alaska 37,000 Year Geochemical Data Finkenbinder, M.S.; Abbott, M.B.; Finney, B.P.; Stoner, J.S.; Dorfman, J.M. Burial Lake, Alaska 37,000 Year Geochemical Data 2015-09-25 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/19240 Investigator M.S. Finkenbinder Investigator M.B. Abbott Investigator B.P. Finney Investigator J.S. Stoner Investigator J.M. Dorfman 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 magnetic susceptibility earth science paleoclimate paleolimnology age control earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology physical properties earth science paleoclimate paleolimnology geochemistry geoscientificInformation 37215 cal yr BP -60 cal yr BP Complete 68.43 68.43 -159.17 -159.17 460 460 Continent North America United States Of America Alaska Burial Lake>LATITUDE 68.43>LONGITUDE -159.17 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII M.S. Finkenbinder, M.B. Abbott, B.P. Finney, J.S. Stoner, J.M. Dorfman 2015 Quaternary Science Reviews 126 227-241 10.1016/j.quascirev.2015.08.031 http://www.sciencedirect.com/science/article/pii/S0277379115300974

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015scat.txt Data File; Burial Lake Incoherent/Coherent XRF Scattering Ratio for Composite Core Sequence GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015dbdloi.txt Data File; Burial Lake Dry Bulk Density and LOI 550 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015agestd.txt Data File; Burial Lake CLAM Best Age with Random Walk Standard Deviation Uncertainties GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015.xlsx Excel Data File; Burial Lake All Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015age.txt Data File; Burial Lake CLAM Linear Age Model Point to Point Interpolation GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015bsi.txt Data File; Burial Lake Biogenic Silica GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015xrf.txt Data File; Burial Lake Elemental Abundances from Scanning XRF GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015ms.txt Data File; Burial Lake Magnetic Susceptibility GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/usa/alaska/burial2015org.txt Data File; Burial Lake Organic Content and Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11