{"xmlId":"74772","NOAAStudyId":"33152","studyName":"Lake N3, Greenland 7,800 Year Chironomid d18O Data","doi":"https://doi.org/10.25921/4zd6-x681","uuid":"51d63056-6c47-4f1d-afed-b84b7035f17e","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"PALEOLIMNOLOGY","investigators":"Corcoran, M.C.; Thomas, E.K.; Morrill, C.","investigatorDetails":[{"firstName":"Megan","lastName":"Corcoran","initials":"M.C.","orcId":"0000-0001-9608-2204"},{"firstName":"Elizabeth","lastName":"Thomas","initials":"E.K.","orcId":"0000-0002-6489-7123"},{"firstName":"Carrie","lastName":"Morrill","initials":"C.","orcId":"0000-0002-1635-5469"}],"version":"1.0","funding":[{"fundingAgency":"Geological Society of America","fundingGrant":"student research grant, Limnogeology Division Kerry Kelts Research Award, Quaternary Geology and Geomorphology Division Marie Morisawa Research Award, Mark Diamond Research Fund grant"},{"fundingAgency":"US National Science Foundation","fundingGrant":"Graduate Research Fellowship, 909334, 520718, EAR Postdoctoral Fellowship"}],"studyNotes":"Oxygen isotope (d18O) data from chironomids in sediments collected in Lake N3, Greenland for the past 7,800 years (Corcoran et al. 2021). Previously archived Thomas et al. 2016 Lake N3 leaf Wax d2H and geochemical data can be found at: https://www.ncdc.noaa.gov/paleo/study/20126","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/33152","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-33152.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-lake-33152.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/lake","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"2021-03-29","entryId":"noaa-lake-33152","earliestYearBP":7758,"mostRecentYearBP":328,"earliestYearCE":-5808,"mostRecentYearCE":1622,"publication":[{"author":{"name":"Elizabeth K. Thomas, Jason P. Briner, John J. Ryan-Henry and Yongsong Huang"},"pubYear":2016,"title":"A major increase in winter snowfall during the middle Holocene on western Greenland caused by reduced sea ice in Baffin Bay and the Labrador Sea","journal":"Geophysical Research Letters","volume":"43","edition":null,"issue":"10","pages":"5302-5308","reportNumber":null,"citation":"Elizabeth K. Thomas, Jason P. Briner, John J. Ryan-Henry and Yongsong Huang. 2016. A major increase in winter snowfall during the middle Holocene on western Greenland caused by reduced sea ice in Baffin Bay and the Labrador Sea. Geophysical Research Letters, 43(10), 5302-5308. doi: 10.1002/2016GL068513","type":"publication","identifier":{"type":"doi","id":"10.1002/2016GL068513","url":"http://dx.doi.org/10.1002/2016GL068513"},"abstract":null,"pubRank":"2"},{"author":{"name":"Megan C. Corcoran, Elizabeth K. Thomas, Carrie Morrill"},"pubYear":2021,"title":"Using a Paired Chironomid d18O and Aquatic Leaf Wax d2H Approach to Reconstruct Seasonality on Western Greenland During the Holocene","journal":"Paleoceanography and Paleoclimatology","volume":"36","edition":null,"issue":"4","pages":null,"reportNumber":"e2020PA004169","citation":"Megan C. Corcoran, Elizabeth K. Thomas, Carrie Morrill. 2021. Using a Paired Chironomid d18O and Aquatic Leaf Wax d2H Approach to Reconstruct Seasonality on Western Greenland During the Holocene. Paleoceanography and Paleoclimatology, 36(4), e2020PA004169. doi: 10.1029/2020PA004169","type":"publication","identifier":{"type":"doi","id":"10.1029/2020PA004169","url":"http://dx.doi.org/10.1029/2020PA004169"},"abstract":"The Arctic hydrological cycle is predicted to intensify as the Arctic warms, due to increased poleward moisture transport during summer and increased evaporation from seas once ice-covered during winter. Records of past Arctic precipitation seasonality are important because they provide a context for these ongoing changes. In some Arctic lakes, stable isotopes of oxygen and hydrogen (d18O and d2H, respectively) vary seasonally, due to seasonal changes in precipitation d18O and d2H. We reconstruct precipitation seasonality from Lake N3, a well-dated lake sediment archive in Disko Bugt, western Greenland, by generating Holocene records of two proxies that are produced at different times of the year, and therefore record different lake water seasonal isotopic compositions. Aquatic plants synthesize waxes throughout the summer, and their d2H reflects winter-biased precipitation d2H at Lake N3, whereas chironomids synthesize their head capsules between late summer and winter, and their d18O reflects summer-biased precipitation d18O at Lake N3. During the middle Holocene at Lake N3, aquatic plant leaf wax was strongly 2H-depleted, while chironomid chitin was 18O-enriched. We guide interpretations of these records using sensitivity tests of a lake water and energy balance model, where we change precipitation amount and isotope seasonality inputs. The sensitivity tests suggest that the contrasting trends between proxies were likely caused by an increase in precipitation amount during all seasons and an increase in precipitation isotope seasonality, in addition to proxy-specific mechanisms, highlighting the importance of understanding lake- and proxy-specific systematics when interpreting records from sediment archives.","pubRank":"1"}],"site":[{"NOAASiteId":"55090","siteName":"Lake N3","siteCode":null,"mappable":"Y","locationName":"Continent>North America>Greenland","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["68.6394","-50.9869"]},"properties":{"southernmostLatitude":"68.6394","northernmostLatitude":"68.6394","westernmostLongitude":"-50.9869","easternmostLongitude":"-50.9869","minElevationMeters":"56","maxElevationMeters":"56"}},"paleoData":[{"dataTableName":"N3d18O-chironomid","NOAADataTableId":"45737","earliestYear":7758,"mostRecentYear":328,"timeUnit":"cal yr BP","earliestYearBP":7758,"mostRecentYearBP":328,"earliestYearCE":-5808,"mostRecentYearCE":1622,"coreLengthMeters":2,"dataTableNotes":"Cores 10N3-SC and 10N3-2A","species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/greenland/n3-2021d18o-chironomid.txt","urlDescription":"NOAA Template File","linkText":"Lake N3 Chironomid d18O Data","variables":[{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>centimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"Composite Depth (midpt)","cvFormat":"Numeric","cvShortName":"depth"},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"mean age of sediment","cvFormat":"Numeric","cvShortName":"age"},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"age variable>age","cvMaterial":null,"cvError":"range>range lower bound","cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"minimum age of sediment","cvFormat":"Numeric","cvShortName":"min_age"},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"age variable>age","cvMaterial":null,"cvError":"range>range upper bound","cvUnit":"time unit>age unit>calendar year before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"maximum age of sediment","cvFormat":"Numeric","cvShortName":"max_age"},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O","cvMaterial":"biological material>organism>midge","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VSMOW","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry>isotope ratio mass spectrometry","cvAdditionalInfo":"oxygen isotopes of chironomid head capsules; temperature conversion elemental analysis IRMS","cvFormat":"Numeric","cvShortName":"d18O"},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O","cvMaterial":"biological material>organism>midge","cvError":"unspecified error>unspecified margin of error","cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil VSMOW","cvSeasonality":null,"cvDetail":null,"cvMethod":"laboratory method>spectroscopy>mass spectrometry>isotope ratio mass spectrometry","cvAdditionalInfo":"d18O analytical error","cvFormat":"Numeric","cvShortName":"d18Oerr"}],"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes"]}]}]}],"reference":{"pastThesaurusSkos":"https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf","pastThesaurusExplorer":"https://www.ncei.noaa.gov/access/paleo-search/cvterms","gcmdKeywordThesaurus":"https://earthdata.nasa.gov/earth-observation-data/find-data/idn/gcmd-keywords"},"dataLicenseDescription":null,"dataLicenseUrl":null}