{"NOAAStudyId":"23087","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":"2017-11-13","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-23087.xml","doi":null,"earliestYearBP":993,"earliestYearCE":957,"entryId":"noaa-lake-23087","funding":[{"fundingAgency":"Manitoba Hydro; Geological Survey of Canada","fundingGrant":null}],"investigators":"Buhay, W.M.; Simpson, S.; Thorleifson, H.; Lewis, M.; King, J.; Telka, A.; Wilkinson, P.; Babb, J.; Timsic, S.; Bailey, D.","mostRecentYearBP":-48,"mostRecentYearCE":1998,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/23087","originalSource":null,"publication":[{"abstract":"A short sediment core (162 cm), covering the period AD 920–1999, was sampled from the south basin of Lake Winnipeg for a suite of multi-proxy analyses leading towards a detailed characterisation of the recent millennial lake environment and hydroclimate of southern Manitoba, Canada. Information on the frequency and duration of major dry periods in southern Manitoba, in light of the changes that are likely to occur as a result of an increasingly warming atmosphere, is of specific interest in this study. Intervals of relatively enriched lake sediment cellulose oxygen isotope values (δ18Ocellulose) were found to occur from AD 1180 to 1230 (error range: AD 1104–1231 to 1160–1280), 1610–1640 (error range: AD 1571–1634 to 1603–1662), 1670–1720 (error range: AD 1643–1697 to 1692–1738) and 1750–1780 (error range: AD 1724–1766 to 1756–1794). Regional water balance, inferred from calculated Lake Winnipeg water oxygen isotope values (δ18Oinf-lw), suggest that the ratio of lake evaporation to catchment input may have been 25–40% higher during these isotopically distinct periods. Associated with the enriched δ18Ocellulose intervals are some depleted carbon isotope values associated with more abundantly preserved sediment organic matter (δ13COM). These suggest reduced microbial oxidation of terrestrially derived organic matter and/or subdued lake productivity during periods of minimised input of nutrients from the catchment area. With reference to other corroborating evidence, it is suggested that the AD 1180–1230, 1610–1640, 1670–1720 and 1750–1780 intervals represent four distinctly drier periods (droughts) in southern Manitoba, Canada. Additionally, lower-magnitude and duration dry periods may have also occurred from 1320 to 1340 (error range: AD 1257–1363), 1530–1540 (error range: AD 1490–1565 to 1498–1572) and 1570–1580 (error range: AD 1531–1599 to 1539–1606).","author":{"name":"Buhay, William Mark; Simpson, Shawna; Thorleifson, Harvey; Lewis, Mike; King, John; Telka, Alice; Wilkinson, Paul; Babb, Jeff; Timsic, Sandra; Bailey, Dan"},"citation":"Buhay, William Mark; Simpson, Shawna; Thorleifson, Harvey; Lewis, Mike; King, John; Telka, Alice; Wilkinson, Paul; Babb, Jeff; Timsic, Sandra; Bailey, Dan. 2009. A 1000-year record of dry conditions in the eastern Canadian prairies reconstructed from oxygen and carbon isotope measurements on Lake Winnipeg sediment organics. Journal of Quaternary Science, 24(5). doi: 10.1002/jqs.1293","edition":null,"identifier":{"id":"10.1002/jqs.1293","type":"doi","url":"http://dx.doi.org/10.1002/jqs.1293"},"issue":"5","journal":"Journal of Quaternary Science","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"A 1000-year record of dry conditions in the eastern Canadian prairies reconstructed from oxygen and carbon isotope measurements on Lake Winnipeg sediment organics","type":"publication","volume":"24"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57550","geo":{"geoType":"Feature","geometry":{"coordinates":["50.57","-96.83"],"type":"POINT"},"properties":{"easternmostLongitude":"-96.83","maxElevationMeters":"217","minElevationMeters":"217","northernmostLatitude":"50.57","southernmostLatitude":"50.57","westernmostLongitude":"-96.83"}},"locationName":"Continent>North America>Canada>Manitoba","mappable":"Y","paleoData":[{"NOAADataTableId":"34496","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/data-version-1.0.0/Winnipeg.Buhay.2009.lpd","linkText":"Lake Winnipeg Oxygen Isotope Data (LiPD Format)","urlDescription":"Linked Paleo Data (LiPD) File Format","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"oxygen isotopes from cellulose;sediment-extracted cellulose","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen 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mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/noaa-templates/data-version-1.0.0/Winnipeg.Buhay.2009.txt","linkText":"Lake Winnipeg Oxygen Isotope Data (NOAA Template Format)","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"oxygen isotopes from cellulose;sediment-extracted cellulose","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"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":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"carbon isotopes from sediment organic matter;organic matter sediment samples sieved at 500 um   #","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>bulk biological material>organic matter","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"}]}],"dataTableName":"Winnipeg.Buhay.2009","dataTableNotes":null,"earliestYear":993,"earliestYearBP":993,"earliestYearCE":957,"mostRecentYear":-48,"mostRecentYearBP":-48,"mostRecentYearCE":1998,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Winnipeg"}],"studyCode":null,"studyName":"Lake Winnipeg, Eastern Canadian Prairies 1000-year Record of Dry Conditions From Oxygen and Carbon Isotope Data","studyNotes":null,"version":"1.0","xmlId":"21264"}