Sikuiui Lake, Greenland 9,500 Year Sediment Biomarker Data Thomas, E.K.; Castañeda, I.S.; McKay, N.P.; Briner, J.P.; Salacup, J.M.; Nguyen, K.Q.; Schweinsberg, A.D. Thomas, E.K. Castañeda, I.S. McKay, N.P. Briner, J.P. Salacup, J.M. Nguyen, K.Q. Schweinsberg, A.D. earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,95% confidence interval upper bound,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,modeled age of sediment) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-III' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIIb' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-Ic (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,modeled age of sediment) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,95% confidence interval lower bound,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,modeled age of sediment) earth science/paleoclimate/paleolimnology (delta 2H,C23 n-alkane,null,per mil VSMOW,null,paleolimnology,null,null,N,dDSummerPrecipitation.air.positive) earth science/paleoclimate/paleolimnology (delta 2H,n-alkane,null,per mil,null,paleolimnology,null,null,N,Evaporation.air.positive; Epsilon between C29 n-alkane d2H and C23 n-alkane d2H) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-III (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIb (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIc (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (delta 2H,C25 n-alkane,null,per mil VSMOW,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,C29 n-alkane,one standard deviation,per mil,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-II (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (number of samples,null,null,count,null,paleolimnology,null,null,N,number of replicate measurements of C29 n-alkane d2H) earth science/paleoclimate/climate reconstructions|paleolimnology (relative humidity,glycerol dialkyl glycerol tetraether|n-alkane,null,percent,summer,climate reconstructions|paleolimnology,anomalized,null,N,RelativeHumidity.air.positive; relative to 7.8 to 7.3 ka baseline calculated using methods from Rach et al. 2017 and values of epsilon and brGDGT-inferred MSAT; median value) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIIc (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIIc' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,midpoint depth in core) earth science/paleoclimate/paleolimnology (number of samples,null,null,count,null,paleolimnology,null,null,N,number of replicate measurements of C23 n-alkane d2H) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIc' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-Ib (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (delta 2H,C23 n-alkane,one standard deviation,per mil,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,C25 n-alkane,one standard deviation,per mil,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (number of samples,null,null,count,null,paleolimnology,null,null,N,number of replicate measurements of C25 n-alkane d2H) earth science/paleoclimate/paleolimnology (delta 2H,C27 n-alkane,null,per mil VSMOW,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (number of samples,null,null,count,null,paleolimnology,null,null,N,number of replicate measurements of C27 n-alkane d2H) earth science/paleoclimate/paleolimnology (delta 2H,C29 n-alkane,null,per mil VSMOW,null,paleolimnology,null,null,N,dDSummerPrecipitation_Evaporation.air.positive) earth science/paleoclimate/climate reconstructions|paleolimnology (relative humidity,glycerol dialkyl glycerol tetraether|n-alkane,95% confidence interval lower bound,percent,summer,climate reconstructions|paleolimnology,anomalized,null,N,RelativeHumidity.air.positive; given all uncertainties in Rach et al. and input parameters; median value) earth science/paleoclimate/climate reconstructions|paleolimnology (relative humidity,glycerol dialkyl glycerol tetraether|n-alkane,95% confidence interval upper bound,percent,summer,climate reconstructions|paleolimnology,anomalized,null,N,RelativeHumidity.air.positive; given all uncertainties in Rach et al. and input parameters; median value) earth science/paleoclimate/paleolimnology (delta 2H,C27 n-alkane,one standard deviation,per mil,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 2H,n-alkane,unspecified margin of error,per mil,null,paleolimnology,null,null,N,uncertainty propagated through epsilon calculation) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-II' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/climate reconstructions|paleolimnology (air temperature,glycerol dialkyl glycerol tetraether,null,degree Celsius,summer,climate reconstructions|paleolimnology,null,null,N,SummerTemperature.air.Positive. Calculated using brGDGT fractional abundances in Russell et al 2018 calibration) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIIb (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-IIb' (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (branched glycerol dialkyl glycerol tetraether,null,null,fraction,null,paleolimnology,null,null,N,fraction of GDGT-I (see Russell et al. 2018 for GDGT compound structures; m/z values; and nomenclature)) earth science/paleoclimate/paleolimnology (Sikuiui Lake>LATITUDE 70.21106>LONGITUDE -51.12485) Arctic precipitation is predicted to increase this century, with dramatic consequences for high-latitude systems. Observations remain spatiotemporally limited, hampering determination of the forcings causing wetter Arctic conditions, although two mechanisms have been proposed: enhanced local evaporation and greater poleward atmospheric moisture transport. Here a subcentennial-resolution multiproxy lake sediment record from western Greenland sheds light on these mechanisms. Cool summers throughout the Northern Hemisphere and in western Greenland 9 to 8 ka are associated with aridity in this region, via reductions in local evaporation and in meridional moisture gradients, which suppressed poleward moisture transport. Summers became more humid starting 8.1 ka, mainly due to increased evaporation from warmer Arctic seas but also to increased poleward moisture transport caused by hemispheric warming. This record provides independent support for predictions of both enhanced local evaporation and increased poleward moisture transport causing wetter Arctic summers in step with global ocean and atmosphere warming. STUDY NOTES: Alkane and GDGT biomarker data from sediments collected in Sikuiui Lake, west Greenland, for the past 9,500 years NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Thomas, E.K. Investigator : Castañeda, I.S. Investigator : McKay, N.P. Investigator : Briner, J.P. Investigator : Salacup, J.M. Investigator : Nguyen, K.Q. Investigator : Schweinsberg, A.D. 2018-11-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/24570 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/sikuiui2018biomarker.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/sikuiui2018biomarker.txt English https://www.ncdc.noaa.gov/paleo/study/24570 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/sikuiui2018biomarker.txt E.K. Thomas, I.S. Castañeda, N.P. McKay, J.P. Briner, J.M. Salacup, K.Q. Nguyen, A.D. Schweinsberg2018A Wetter Arctic Coincident With Hemispheric Warming 8,000 Years AgoGeophysical Research Letters451910637-1064710.1029/2018GL079517https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL079517 START YEAR: 9563 cal yr BP * END YEAR: -55 cal yr BP -51.12485 70.21106 -51.12485 70.21106