Lake El'gygytgyn, NE Russia, MIS 8-12 Biogeochemical Data D'Anjou, R.M.; Wei, J.H.; Castañeda, I.S.; Brigham-Grette, J.; Petsch, S.T.; Finkelstein, D.B. D'Anjou, R.M. Wei, J.H. Castañeda, I.S. Brigham-Grette, J. Petsch, S.T. Finkelstein, D.B. Arctic biogeochemical cycles earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Sun et al.(2012)) earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Peterse et al. (2012)) earth science/paleoclimate/paleolimnology (branched and isoprenoid tetraether index,null,null,dimensionless,null,paleolimnology,null,high-performance liquid chromatography,N,null) earth science/paleoclimate/paleolimnology (isoprenoid glycerol dialkyl glycerol tetraether,null,null,microgram per gram,null,paleolimnology,null,null,N,crenarchaeol) earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Pearson et al. (2011)) earth science/paleoclimate/paleolimnology (dinosterol,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null) earth science/paleoclimate/paleolimnology (glycerol dialkyl glycerol tetraether,null,null,microgram per gram,null,paleolimnology,null,high-performance liquid chromatography,N,null) earth science/paleoclimate/paleolimnology (arborinol,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null) earth science/paleoclimate/paleolimnology (long-chain alkyl diol,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,"Sum of Total Long Chain (28-1"",""15 30-1"",""15 32-1"",""15) n alkyl diols") earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar kiloyear before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Zink et al. (2010)) earth science/paleoclimate/paleolimnology (n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,Total Short Chain n-alkanes (nC17-21)) earth science/paleoclimate/paleolimnology (organic compound,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,aquatic sterol and diol) earth science/paleoclimate/paleolimnology (methylation index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,high-performance liquid chromatography,N,null) earth science/paleoclimate/paleolimnology (cyclization index of branched tetraethers,null,null,dimensionless,null,paleolimnology,null,high-performance liquid chromatography,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Weijers et al. (2007)) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,meter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (surface air temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,annual,climate reconstructions|paleolimnology,null,null,N,MBT/CBT Tierney et al. (2010)) earth science/paleoclimate/paleolimnology (terrestrial to aquatic ratio,null,null,dimensionless,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null) earth science/paleoclimate/paleolimnology (carbon preference index,null,null,null,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake El'gygytgyn>LATITUDE 67.4997>LONGITUDE 172.1038) Marine isotope stages (MIS) 11 has been proposed as an analog for the present interglacial; however, terrestrial records of this time period are rare. Sediments from Lake El'gygytgyn (67°30' N, 172°5' E) in Far East Russia contain a 3.56 Ma record of climate variability from the Arctic. Here, we present the first terrestrial Arctic reconstruction of environmental and climatic changes from MIS 8 through 12 (289 to 464 ka) using organic geochemical proxies. Terrestrial vegetation changes, as revealed by plant leaf wax (n-alkane) indices and concentrations of arborinol (a biomarker for trees), show increased tree cover around the lake during interglacial periods, with higher concentrations observed during MIS 11 as compared to MIS 9. A similar pattern is also observed in records of aquatic productivity revealed by molecular indicators from dinoflagellates (dinosterol), eustigmatophyte algae (long-chain (C28-C32) 1, 15 n-alkyl diols) in addition to short-chain n-alkanes, where aquatic productivity is highest during MIS 11. Changes recorded in these molecular proxies show a similar structure to relative temperature variability as recorded by the MBT/CBT (Methylation of Branched Tetraether/Cyclization of Branched Tetraether) paleothermometer, based on branched glycerol dialkyl glycerol tetraethers (GDGTs). Additionally, relative MBT/CBT temperature changes generally track pollen and diatom d18O temperature estimates, compiled by other studies, which suggest glacial-interglacial temperature changes of ~ 9 to 12°C. These records of environmental and climatic change indicate Arctic sensitivity to external forcings such as orbital variability and atmospheric greenhouse gas concentrations. Overall, this study indicates that organic geochemical analyses of the Lake El'gygytgyn sediment archive can provide critical insight into the response of lake ecosystems and their sensitivity in high latitude regions. STUDY NOTES: Organic geochemical proxy data from sediments collected in Arctic Lake El'gygytgyn, NE Russia, for Marine Isotope Stages 8-12 (289 to 464 ka). Biogeochemical data include plant leaf wax (n-alkane) indices, arborinol (a biomarker for trees), molecular indicators from dinoflagellates (dinosterol), eustigmatophyte algae (long-chain (C28-C32) 1, 15 n-alkyl diols), short-chain n-alkanes, MBT/CBT (Methylation of Branched Tetraether/Cyclization of Branched Tetraether), and branched glycerol dialkyl glycerol tetraethers (GDGTs). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : D'Anjou, R.M. Investigator : Wei, J.H. Investigator : Castañeda, I.S. Investigator : Brigham-Grette, J. Investigator : Petsch, S.T. Investigator : Finkelstein, D.B. 2013-06-28 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/14630 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2013biogeochem.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2013biogeochem.txt English https://www.ncdc.noaa.gov/paleo/study/14630 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/russia/elgygytgyn2013biogeochem.txt R.M. D'Anjou, J.H. Wei, I.S. Castañeda, J. Brigham-Grette, S.T. Petsch, and D.B. Finkelstein. 2013. High-latitude environmental change during MIS 9 and 11: biogeochemical evidence from Lake El'gygytgyn, Far East Russia. Climate of the Past, Vol. 9, Issue 2, pp. 567-581. DOI: 10.5194/cp-9-567-2013 START YEAR: 464030 cal yr BP * END YEAR: 288100 cal yr BP 172.1038 67.4997 172.1038 67.4997