Lake El'gygytgyn, NE Russia Pliocene Biogeochemical Data and Temperature Reconstruction Keisling, B.A.; Castañeda, I.S.; Brigham-Grette, J. Keisling, B.A. Castañeda, I.S. Brigham-Grette, J. Air Temperature Reconstruction earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT IIIc; 1046 fract) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,null,null,dimensionless,null,paleolimnology,null,null,N,Weijers et al. 2007) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,duplicate measurements; Weijers et al. 2007) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,alternative analytical method UHPLC; Hopmans et al. 2016) earth science/paleoclimate/climate reconstructions|paleolimnology (air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleolimnology,null,null,N,presumed summer; MAAT=3.949-5.593*CBT+38.213*MBT Sun et al. 2011) earth science/paleoclimate/climate reconstructions|paleolimnology (air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,alternative analytical method UHPLC; Sun et al. 2011) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT III; 1050 fract) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT IIIb; 1048 fract) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT IIc; 1032 fract) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,Weijers et al. 2007) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,null,null,dimensionless,null,paleolimnology,null,null,N,duplicate measurements; Weijers et al. 2007) earth science/paleoclimate/paleolimnology (C29 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C33 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar kiloyear before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT II; 1036 fract) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT Ic; 1018 fract) earth science/paleoclimate/paleolimnology (cyclization index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,Weijers et al. 2007) earth science/paleoclimate/paleolimnology (C25 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C30 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C31 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (average chain length,n-alkane,null,count,null,paleolimnology,null,null,N,n-alkane average chain length; Poynter and Eglinton 1990) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,null,null,dimensionless,null,paleolimnology,null,null,N,alternative analytical method UHPLC; Hopmans et al. 2016) earth science/paleoclimate/paleolimnology (delta 2H,C29 n-alkane,one standard deviation,per mil VSMOW,null,paleolimnology,null,null,N,calculation of final dD and propagation of error follows Polissar & D'Andrea 2014) earth science/paleoclimate/climate reconstructions|paleolimnology (air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,original MAAT; Sun et al. 2011) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,meter,null,climate reconstructions|paleolimnology,null,null,N,composite depth) earth science/paleoclimate/paleolimnology (C22 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C26 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (delta 2H,C29 n-alkane,null,per mil VSMOW,null,paleolimnology,null,null,N,calculation of final dD and propagation of error follows Polissar & D'Andrea 2014) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT IIb; 1034 fract) earth science/paleoclimate/paleolimnology (C24 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C28 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (number of samples,null,null,count,null,paleolimnology,null,null,N,number of times each sample was run for dD) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT I; 1022 fract) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,percent,null,paleolimnology,null,null,N,Hopmans et al. 2000; Schouten et al. 2007; brGDGT Ib; 1020 fract) earth science/paleoclimate/paleolimnology (cyclization index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,duplicate measurements; Weijers et al. 2007) earth science/paleoclimate/paleolimnology (cyclization index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,null,N,alternative analytical method UHPLC; Hopmans et al. 2016) earth science/paleoclimate/paleolimnology (C21 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C23 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C27 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (C32 n-alkane,null,null,percent,null,paleolimnology,null,null,N,Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology (n-alkane,null,null,microgram per gram,null,paleolimnology,null,null,N,total concentration; Eglinton and Hamilton 1967) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake El'gygytgyn>LATITUDE 67.4997>LONGITUDE 172.1038) The Pliocene epoch represents an analog for future climate, with atmospheric carbon dioxide concentrations and continental configurations similar to present. Although the presence of multiple positive feedbacks in polar regions leads to amplified climatic changes, conditions in the Pliocene terrestrial Arctic are poorly characterized. High latitude sedimentary records indicate that dramatic glacial advance and decay occurred in the Pliocene Arctic, with attendant effects on global sea-level. Understanding these deposits and their implications for Earth's future requires developing a sense of climatic evolution across the Pliocene-Pleistocene transition and during the intensification of Northern Hemisphere Glaciation (iNHG) ~2.7 million yr ago (Ma). Here we reconstruct Arctic terrestrial environmental change from 2.82-2.41 Ma (Marine Isotope Stages (MIS) G10-95) using the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) and the isotopic composition of plant leaf waxes (dDwax) in a sedimentary archive from Lake El'gygytgyn, Northeast Russia. Our records reveal changes in proxy behavior across this interval that we attribute to changing boundary conditions, including sea level, sea ice, vegetation and pCO2 during different MISs. We find that brGDGT temperatures and dDwax are decoupled for most of the record, although both show an increasing range of glacial-interglacial variability following iNHG. dDwax is stable from MIS G10-G4 despite changes in vegetation and temperature, suggesting different sources or pathways for moisture to Lake El'gygytgyn during the Late Pliocene. STUDY NOTES: Biogeochemical data and deuterium isotopes from Pliocene sediments (2.8 - 2.4 ma) collected in Lake El'gygytgyn, NE Russia. Data include branched GDGT (glycerol dialkyl glycerol tetraether) measurements and indices, n-alkanes, deuterium isotopes, and reconstructed temperature. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Keisling, B.A. Investigator : Castañeda, I.S. Investigator : Brigham-Grette, J. 2017-08-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22438 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2017.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2017.txt English https://www.ncdc.noaa.gov/paleo/study/22438 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2017.txt Benjamin A. Keisling, Isla S. Castañeda, Julie Brigham-Grette2017Hydrological and temperature change in Arctic Siberia during the intensification of Northern Hemisphere GlaciationEarth and Planetary Science Letters457136-14810.1016/j.epsl.2016.09.058 http://www.sciencedirect.com/science/article/pii/S0012821X16305490 START YEAR: 2820000 cal yr BP * END YEAR: 2410770 cal yr BP 172.1038 67.4997 172.1038 67.4997