{"xmlId":"8844","NOAAStudyId":"9950","studyName":"Lake Titicaca 20-60KYrBP Biogenic Silica and Grain Size Data","doi":"https://doi.org/10.25921/jnt5-c531","uuid":"92bdba32-ebe3-454d-b71b-ceecf821b82b","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":"Fritz, S.C.; Baker, P.A.; Ekdahl, E.; Seltzer, G.O.; Stevens, L.R.","investigatorDetails":[{"firstName":"Sherilyn","lastName":"Fritz","initials":"S.C.","orcId":"0000-0002-4423-4189"},{"firstName":"Paul","lastName":"Baker","initials":"P.A.","orcId":"0000-0001-9438-855X"},{"firstName":"Erik","lastName":"Ekdahl","initials":"E.","orcId":null},{"firstName":"Geoffrey","lastName":"Seltzer","initials":"G.O.","orcId":null},{"firstName":"Lora","lastName":"Stevens","initials":"L.R.","orcId":"0000-0002-8762-7900"}],"version":"1.0","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"studyNotes":"Biogenic silica, grain size, and diatom data from 136m long sediment core \r\nLT01-2B, Lake Titicaca, Bolivia/Peru, drilled in April and May 2001, \r\ncovering ~60 - 20 KYrBP.  d13C data is from P.A. Baker, diatom and BiSiO2 \r\ndata is from S.C. Fritz, and grain size data from G.O. Seltzer.  \r\n\r\nAdditional information on the LT01-2B drill cores, age model \r\ndevelopment, and additional core data are included with \r\nFritz et al. 2007 Lake Titicaca data set: \r\nhttps://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/southamerica/bolivia/titicaca2007.txt","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/9950","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-9950.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-lake-9950.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/lake","studyCode":null,"scienceKeywords":["Tropics","PAGES 2k Network","Glacial","PAGES LOTRED SA2k"],"reconstruction":"N","contributionDate":"2010-08-25","entryId":"noaa-lake-9950","earliestYearBP":59891,"mostRecentYearBP":10034,"earliestYearCE":-57941,"mostRecentYearCE":-8084,"publication":[{"author":{"name":"Fritz, S.C., P.A. Baker, E. Ekdahl, G.O. Seltzer, and L.R. Stevens"},"pubYear":2010,"title":"Millennial-scale climate variability during the last glacial period in the tropical Andes","journal":"Quaternary Science Reviews","volume":"29","edition":null,"issue":"7-8","pages":"1017-1024","reportNumber":null,"citation":"Fritz, S.C., P.A. Baker, E. Ekdahl, G.O. Seltzer, and L.R. Stevens. 2010. Millennial-scale climate variability during the last glacial period in the tropical Andes. Quaternary Science Reviews, 29(7-8), 1017-1024. doi: 10.1016/j.quascirev.2010.01.001","type":"publication","identifier":{"type":"doi","id":"10.1016/j.quascirev.2010.01.001","url":"http://dx.doi.org/10.1016/j.quascirev.2010.01.001"},"abstract":"Millennial-scale climate variation during the Last Glacial period is evident in many locations worldwide, but it is unclear if such variation occurred in the interior of tropical South America, and, if so, how the low-latitude variation was related to its high-latitude counterpart. A high-resolution record, derived from the deep drilling of sediments on the floor of Lake Titicaca in the southern tropical Andes, is presented that shows clear evidence of millennial-scale climate variation between ~60 and 20 ka BP.  This variation is manifested by alternations of two interbedded sedimentary units. The two units have distinctive sedimentary, geochemical, and paleobiotic properties that are controlled by the relative abundance of terrigenous or nearshore components versus pelagic components. The sediments of more terrigenous or nearshore nature likely were deposited during regionally wetter climates when river transport of water and sediment was higher, whereas the sediments of more pelagic character were deposited during somewhat drier climates regionally. The majority of the wet periods inferred from the Lake Titicaca sediment record are correlated with the cold events in the Greenland ice cores and North Atlantic sediment cores, indicating that increased intensity of the South American summer monsoon was part of near-global scale climate excursions.","pubRank":"1"}],"site":[{"NOAASiteId":"19889","siteName":"Lake Titicaca Core LT01-2B","siteCode":null,"mappable":"Y","locationName":"Continent>South America>Peru","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["-15.93","-69.25"]},"properties":{"southernmostLatitude":"-15.93","northernmostLatitude":"-15.93","westernmostLongitude":"-69.25","easternmostLongitude":"-69.25","minElevationMeters":"3810","maxElevationMeters":"3810"}},"paleoData":[{"dataTableName":"LT01-2B","NOAADataTableId":"18797","earliestYear":59891,"mostRecentYear":10034,"timeUnit":"cal yr 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