{"NOAAStudyId":"23073","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":"2017-11-15","dataPublisher":"NOAA","dataType":"CLIMATE RECONSTRUCTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-reconstruction","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-recon-23073.xml","doi":null,"earliestYearBP":6896,"earliestYearCE":-4946,"entryId":"noaa-recon-23073","funding":[{"fundingAgency":"Canadian Foundation for Climate and Atmospheric Sciences","fundingGrant":null}],"investigators":"Michels, A.; Laird, K.R.; Wilson, S.E.; Thomson, D.; Leavitt, P.R.; Oglesby, R.J.; Cumming, B.F.","mostRecentYearBP":76,"mostRecentYearCE":1874,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/23073","originalSource":null,"publication":[{"abstract":"Three high-resolution climatic reconstructions, based on diatom analyses from lake sediment cores from the Canadian prairies, show that shifts in drought conditions have prevailed on centennial to millennial time scales for at least the past six millennia. These shifts in mean aridity exhibit broad regional synchrony, with particularly pronounced shifts at all sites between ~1700-2000 cal. yr bp and ~3600-3900 cal. yr bp, as well as at ~5400-5500 cal. yr bp for the two sites which extend back to at least 6000 cal. yr bp. The two Saskatchewan lakes exhibited significant coherence in both the timing and direction of these shifts, whereas inferred changes at the westernmost site in Alberta were significantly correlated to the Saskatchewan sites, but opposite in sign, and exhibited more high-frequency variation on the scale of centuries. The mechanisms behind these abrupt shifts in aridity are poorly understood, but may be linked to changes in oceanic-atmospheric interactions that influence the mean position of the jetstream and the associated storm tracks. Natural shifts in mean climatic conditions may accelerate with increasing carbon dioxide levels intensifying the likelihood of extreme droughts in North American prairies.","author":{"name":"ASTRID MICHELS, KATHLEEN R. LAIRD, SUSAN E. WILSON, DAVID THOMSON, PETER R. LEAVITT, ROBERT J. OGLESBY and BRIAN F. CUMMING"},"citation":"ASTRID MICHELS, KATHLEEN R. LAIRD, SUSAN E. WILSON, DAVID THOMSON, PETER R. LEAVITT, ROBERT J. OGLESBY and BRIAN F. CUMMING. 2007. Multidecadal to millennial-scale shifts in drought conditions on the Canadian prairies over the past six millennia: implications for future drought assessment. Global Change Biology, 13(7), 1295-1307. doi: 10.1111/j.1365-2486.2007.01367.x","edition":null,"identifier":{"id":"10.1111/j.1365-2486.2007.01367.x","type":"doi","url":"http://dx.doi.org/10.1111/j.1365-2486.2007.01367.x"},"issue":"7","journal":"Global Change Biology","pages":"1295-1307","pubRank":"1","pubYear":2007,"reportNumber":null,"title":"Multidecadal to millennial-scale shifts in drought conditions on the Canadian prairies over the past six millennia: implications for future drought assessment","type":"publication","volume":"13"}],"reconstruction":"Y","scienceKeywords":["Other Hydroclimate Reconstruction"],"site":[{"NOAASiteId":"57561","geo":{"geoType":"Feature","geometry":{"coordinates":["49.78","-105.33"],"type":"POINT"},"properties":{"easternmostLongitude":"-105.33","maxElevationMeters":"686","minElevationMeters":"686","northernmostLatitude":"49.78","southernmostLatitude":"49.78","westernmostLongitude":"-105.33"}},"locationName":"Continent>North America>Canada>Saskatchewan","mappable":"Y","paleoData":[{"NOAADataTableId":"34556","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>lake salinity"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/data-version-1.0.0/Oro.Michels.2007.lpd","linkText":"Oro Lake Salinity Reconstruction","urlDescription":"Linked Paleo Data (LiPD) File Format","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|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":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>biological assemblage>diatom assemblage","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>solution property>salinity"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>solution property>salinity"}]},{"NOAAKeywords":["earth science>paleoclimate>reconstructions>lake salinity"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/noaa-templates/data-version-1.0.0/Oro.Michels.2007.txt","linkText":"Oro Lake Salinity Reconstruction","urlDescription":"NOAA Template File","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"}]}],"dataTableName":"Oro.Michels.2007","dataTableNotes":null,"earliestYear":6896,"earliestYearBP":6896,"earliestYearCE":-4946,"mostRecentYear":76,"mostRecentYearBP":76,"mostRecentYearCE":1874,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Oro Lake"}],"studyCode":null,"studyName":"Oro Lake, Saskatchewan 6,800 Year Salinity Reconstruction","studyNotes":null,"version":"1.0","xmlId":"21356"}