{"NOAAStudyId":"14513","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2013-05-24","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-14513.xml","doi":null,"earliestYearBP":8771,"earliestYearCE":-6821,"entryId":"noaa-lake-14513","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"investigators":"Balascio, N.L.; D'Andrea, W.J.; Bradley, R.S.; Perren, B.","mostRecentYearBP":-60,"mostRecentYearCE":2010,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/14513","originalSource":null,"publication":[{"abstract":"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.\r\n","author":{"name":"Balascio, N.L., W.J. D'Andrea, R.S. Bradley, and B.B. Perren"},"citation":"Balascio, N.L., W.J. D'Andrea, R.S. Bradley, and B.B. Perren. 2013. Biogeochemical evidence for hydrologic changes during the Holocene in a lake sediment record from southeast Greenland. The Holocene, 23, 1428-1439. doi: 10.1177/0959683613493938","edition":null,"identifier":{"id":"10.1177/0959683613493938","type":"doi","url":"http://dx.doi.org/10.1177/0959683613493938"},"issue":null,"journal":"The Holocene","pages":"1428-1439","pubRank":"1","pubYear":2013,"reportNumber":null,"title":"Biogeochemical evidence for hydrologic changes during the Holocene in a lake sediment record from southeast Greenland","type":"publication","volume":"23"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"54952","geo":{"geoType":"Feature","geometry":{"coordinates":["65.6107","-37.6935"],"type":"POINT"},"properties":{"easternmostLongitude":"-37.6935","maxElevationMeters":"73","minElevationMeters":"73","northernmostLatitude":"65.6107","southernmostLatitude":"65.6107","westernmostLongitude":"-37.6935"}},"locationName":"Continent>North America>Greenland","mappable":"Y","paleoData":[{"NOAADataTableId":"24504","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013ms.txt","linkText":"flower-valley2013ms.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"x10-6 units","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"magnetic susceptibility measurement with point or surface sensor","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless (SI system)","cvWhat":"magnetic property>magnetic moments>magnetic susceptibility>volume magnetic susceptibility"}]}],"dataTableName":"FlowerValley2013MS","dataTableNotes":null,"earliestYear":8692,"earliestYearBP":8692,"earliestYearCE":-6742,"mostRecentYear":-60,"mostRecentYearBP":-60,"mostRecentYearCE":2010,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"24505","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>carbon isotopes","earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013cn.txt","linkText":"flower-valley2013cn.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>carbon/nitrogen"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>bulk biological material>organic matter","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"FlowerValley2013CN","dataTableNotes":null,"earliestYear":8771,"earliestYearBP":8771,"earliestYearCE":-6821,"mostRecentYear":-33,"mostRecentYearBP":-33,"mostRecentYearCE":1983,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"24506","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>hydrogen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/greenland/flower-valley2013alkanes.txt","linkText":"flower-valley2013alkanes.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C21 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C23 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C25 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C27 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C29 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C31 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"gas chromatography - flame ionization detection","cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per gram","cvWhat":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C33 n-alkane"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"count","cvWhat":"chemical composition>compound>organic compound>organic compound index>chain length index>average chain length"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>compound>organic compound>organic compound index>carbon preference index"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C27 n-alkane","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C29 n-alkane","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C31 n-alkane","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":"Apparent fractionation value of lake water derived lipids (aq) from precipitation (p)","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>hydrocarbon>alkane>n-alkane>C25 n-alkane","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"}]}],"dataTableName":"FlowerValley2013Alkanes","dataTableNotes":null,"earliestYear":8560,"earliestYearBP":8560,"earliestYearCE":-6610,"mostRecentYear":308,"mostRecentYearBP":308,"mostRecentYearCE":1642,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Flower Valley Lake"}],"studyCode":null,"studyName":"Flower Valley Lake, Southeast Greenland 8800 Year Biogeochemical Data","studyNotes":"Biogeochemical data from a 1.6-m sediment core from Flower Valley Lake \non Ammassalik Island spanning the last 8.8 ka. Data include Magnetic susceptibility, \nbulk biogeochemical properties (TOC, C/N, d13Corg), lipid biomarkers (n-alkanes; C16 -C31), \nhydrogen isotope values (dD) of mid- (n-C25) and long-chain (n-C29, n-C31) n-alkanes.\n","version":"1.0","xmlId":"12516"}