noaa-lake-24570 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. Sikuiui Lake, Greenland 9,500 Year Sediment Biomarker Data 2018-11-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/24570 Investigator E.K. Thomas Investigator I.S. Castañeda Investigator N.P. McKay Investigator J.P. Briner Investigator J.M. Salacup Investigator K.Q. Nguyen Investigator A.D. Schweinsberg 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 geochemistry geoscientificInformation 9563 cal yr BP -55 cal yr BP Complete 70.21106 70.21106 -51.12485 -51.12485 Continent North America Greenland Sikuiui Lake>LATITUDE 70.21106>LONGITUDE -51.12485 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 E.K. Thomas, I.S. Castañeda, N.P. McKay, J.P. Briner, J.M. Salacup, K.Q. Nguyen, A.D. Schweinsberg 2018 Geophysical Research Letters 45 19 10637-10647 10.1029/2018GL079517 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL079517

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

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/sikuiui2018biomarker.txt NOAA Template File; Sikuiui Lake Sediment Biomarker Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11