{"NOAAStudyId":"6189","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":"2008-07-01","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-6189.xml","doi":null,"earliestYearBP":350,"earliestYearCE":1600,"entryId":"noaa-lake-6189","funding":[],"investigators":"Francus, P.; Bradley, R.S.; Abbott, M.B.; Patridge, W.; Keimig, F.T.","mostRecentYearBP":-49,"mostRecentYearCE":1999,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6189","originalSource":null,"publication":[{"abstract":"We obtained quantitative multivariate data from each varve of a minerogenic lacustrine sequence from the Canadian High Arctic, using an image analysis technique applied to thin-sections. The information on each varve from the uppermost core section was compared with a 35 yr meteorological dataset. Snowmelt intensity, which is an index reflecting the energy available for sediment transport, correlates well with the median grain-size measured for each varve, as well as with the weight of the 10-20 and 20-60 um fractions. The proportion of fine silt also correlates with low intensity summer precipitation. This methodology allows us to decipher the climatic control on sedimentary processes and yield a new perspective for constructing models which link climate to sediments that contain few biological remains. This model can then be used to infer paleoclimate with annual resolution from the downcore grain-size analysis.","author":null,"citation":"Francus, P.,Bradley, R.S.,Abbott, M.B.,Patridge, W.,Keimig, F. 2002. Paleoclimate studies of minerogenic sediments using annually resolved textural parameters. Geophysical Research Letters, 29(20), 1998","edition":null,"identifier":null,"issue":null,"journal":"Geophysical Research Letters","pages":null,"pubRank":"1","pubYear":2002,"reportNumber":null,"title":"Paleoclimate studies of minerogenic sediments using annually resolved textural parameters","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"20655","geo":{"geoType":"Feature","geometry":{"coordinates":["79.334","-83.85"],"type":"POINT"},"properties":{"easternmostLongitude":"-83.85","maxElevationMeters":"280","minElevationMeters":"280","northernmostLatitude":"79.334","southernmostLatitude":"79.334","westernmostLongitude":"-83.85"}},"locationName":"Continent>North America>Canada>Nunavut","mappable":"Y","paleoData":[{"NOAADataTableId":"9499","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/ellesmere/sawtooth2002.txt","linkText":"sawtooth2002.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":"varve years","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":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"physical property>length>varve thickness"},{"cvAdditionalInfo":"equivalent disk diameter","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"micrometer","cvWhat":"physical property>diameter>grain size>grain size parameter>grain size median"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/ellesmere/sawtooth2002.xls","linkText":"sawtooth2002.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Sawtooth Lake SAWTOOTH Sediment","dataTableNotes":null,"earliestYear":350,"earliestYearBP":350,"earliestYearCE":1600,"mostRecentYear":-49,"mostRecentYearBP":-49,"mostRecentYearCE":1999,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Sawtooth Lake"}],"studyCode":null,"studyName":"Sawtooth Lake, Ellesmere Island 400 Year Varved Sediment Data","studyNotes":"Lamination thickness measured on enlarged digital photo of sediment thin-sections using a utility described in Francus et al. (2002). We estimate the precision of the measurements at about 0.04 mm.","version":"1.0","xmlId":"2140"}