noaa-lake-14513 Flower Valley Lake, Southeast Greenland 8800 Year Biogeochemical Data Balascio, N.L.; D'Andrea, W.J.; Bradley, R.S.; Perren, B. Flower Valley Lake, Southeast Greenland 8800 Year Biogeochemical Data 2013-05-24 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/14513 Investigator N.L. Balascio Investigator W.J. D'Andrea Investigator R.S. Bradley Investigator B. Perren earth science paleoclimate paleolimnology C23 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology delta 2H,C25 n-alkane,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology depth,null,null,centimeter,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology C21 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology delta 2H,C27 n-alkane,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology delta 2H,null,null,per mil VSMOW,null,paleolimnology,null,null,N,Apparent fractionation value of lake water derived lipids (aq) from precipitation (p) earth science paleoclimate paleolimnology carbon preference index,null,null,dimensionless,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology C27 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology C31 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology C33 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology delta 13C,organic matter,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology C25 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology C29 n-alkane,null,null,microgram per gram,null,paleolimnology,null,gas chromatography - flame ionization detection,N,null earth science paleoclimate paleolimnology delta 2H,C31 n-alkane,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology carbon/nitrogen,sediment,null,dimensionless,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,magnetic susceptibility measurement with point or surface sensor,N,x10-6 units earth science paleoclimate paleolimnology age,null,null,calendar year before present,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology average chain length,n-alkane,null,count,null,paleolimnology,null,null,N,null earth science paleoclimate paleolimnology delta 2H,C29 n-alkane,null,per mil VSMOW,null,paleolimnology,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleolimnology organic carbon,sediment,null,percent,null,paleolimnology,null,elemental analysis,N,null earth science paleoclimate paleolimnology magnetic susceptibility earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology geochemistry earth science paleoclimate paleolimnology hydrogen isotopes geoscientificInformation 8771 cal yr BP -60 cal yr BP Complete 65.6107 65.6107 -37.6935 -37.6935 73 73 Continent North America Greenland Flower Valley Lake>LATITUDE 65.6107>LONGITUDE -37.6935 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

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Boulder CO 80305-3328 USA online ASCII Balascio, N.L., W.J. D'Andrea, R.S. Bradley, and B.B. Perren 2013 The Holocene 23 1428-1439 10.1177/0959683613493938

Holocene paleoclimate records from Greenland help us understand the response of the Greenland Ice Sheet and regional oceanic and atmospheric circulation systems to natural climate variability in order to place recent changes in a longer-term perspective. Here biogeochemical analysis of a lake sediment core from southeast Greenland is used to define changes in moisture balance and runoff during the Holocene in a catchment near the margin of the Greenland Ice Sheet. A 1.6-m sediment core that spans the last 8.8 ka was recovered from Flower Valley Lake on Ammassalik Island. Magnetic susceptibility, diatoms, bulk biogeochemical properties (TOC, C/N, d13Corg), and lipid biomarkers (n-alkanes; C16 -C31) reveal changes in clastic sedimentation and the relative input of terrestrial- and aquatic-derived organic matter. Hydrogen isotope values (dD) of mid- (n-C25) and long-chain (n-C29, n-C31) n-alkanes allow reconstruction of dD of precipitation and summertime evaporation of lake water. Following a period of early lake ontogeny and landscape stabilization after deglaciation from 8.4-7.0 ka, the mid-Holocene, 8.4-4.1 ka, is characterized by greater evaporative enrichment of the lake water as indicated by dD records. After 4.1 ka, there is a decrease in evaporative enrichment of the lake water. There is also an abrupt transition to more variable sedimentation marked by sharp increases in magnetic susceptibility, C/N, d13Corg, and the concentration of long-chain n-alkanes, showing periodic delivery of terrestrial organic matter and clastic sediment to the lake. Higher insolation during the mid-Holocene resulted in a warmer and drier climate with longer ice-free periods in the summer and enhanced evaporation of lake water. The reduction in insolation and colder temperatures during the late Holocene caused a reduction in evaporation of lake water over the last 4.1 ka and was accompanied by periodic increases in surface runoff, which correspond with intervals of cold Greenland Ice Sheet surface temperatures. STUDY NOTES: Biogeochemical data from a 1.6-m sediment core from Flower Valley Lake on Ammassalik Island spanning the last 8.8 ka. Data include Magnetic susceptibility, bulk biogeochemical properties (TOC, C/N, d13Corg), lipid biomarkers (n-alkanes; C16 -C31), hydrogen isotope values (dD) of mid- (n-C25) and long-chain (n-C29, n-C31) n-alkanes.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013ms.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013cn.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013alkanes.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11