{"NOAAStudyId":"9952","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":"2010-08-26","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-9952.xml","doi":null,"earliestYearBP":49959,"earliestYearCE":-48009,"entryId":"noaa-lake-9952","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"investigators":"Baker, P.A.; Rigsby, C.A.; Seltzer, G.O.; Fritz, S.C.; Lowenstein, T.K.; Bacher, N.; Veliz, Y","mostRecentYearBP":0,"mostRecentYearCE":1950,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/9952","originalSource":null,"publication":[{"abstract":"Tropical South America is one of the three main centres of the \nglobal, zonal overturning circulation of the equatorial atmosphere \n(generally termed the 'Walker' circulation). Although this area \nplays a key role in global climate cycles, little is known about \nSouth American climate history. Here we describe sediment cores \nand down-hole logging results of deep drilling in the Salar de \nUyuni, on the Bolivian Altiplano, located in the tropical Andes. \nWe demonstrate that during the past 50,000 years the Altiplano \nunderwent important changes in effective moisture at both orbital \n(20,000-year) and millennial timescales. Long-duration wet periods, \nsuch as the Last Glacial Maximum marked in the drill core by \ncontinuous deposition of lacustrine sediments appear to have \noccurred in phase with summer insolation maxima produced by the \nEarth's precessional cycle. Short-duration, millennial events \ncorrelate well with North Atlantic cold events, including Heinrich \nevents 1 and 2, as well as the Younger Dryas episode. At both \nmillennial and orbital timescales, cold sea surface temperatures \nin the high-latitude North Atlantic were coeval with wet conditions \nin tropical South America, suggesting a common forcing. \n\n","author":null,"citation":"Baker, P.A., C.A. Rigsby, G.O. Seltzer, S.C. Fritz, T. Lowenstein, \nN. Bacher, and Y. Veliz.  2001. \nTropical climate changes at millennial and orbital timescales \nrevealed by deep drilling on the South American Altiplano. \nNature 409: 698-701. \n","edition":null,"identifier":null,"issue":null,"journal":"Nature","pages":null,"pubRank":"1","pubYear":2001,"reportNumber":null,"title":"Tropical climate changes at millennial and orbital timescales  revealed by deep drilling on the South American Altiplano","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["PAGES 2k Network","PAGES LOTRED SA2k","hydrology"],"site":[{"NOAASiteId":"8965","geo":{"geoType":"Feature","geometry":{"coordinates":["-20.25","-67.5"],"type":"POINT"},"properties":{"easternmostLongitude":"-67.5","maxElevationMeters":"3653","minElevationMeters":"3653","northernmostLatitude":"-20.25","southernmostLatitude":"-20.25","westernmostLongitude":"-67.5"}},"locationName":"Continent>South America>Bolivia","mappable":"Y","paleoData":[{"NOAADataTableId":"18798","coreLengthMeters":26,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/bolivia/salar-de-uyuni2001.txt","linkText":"salar-de-uyuni2001.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":"corrected","cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"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":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"count per second","cvWhat":"electromagnetic property>gamma radiation"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/bolivia/salar-de-uyuni2001.xls","linkText":"salar-de-uyuni2001.xls","urlDescription":"Data","variables":[]}],"dataTableName":"SU2001","dataTableNotes":null,"earliestYear":49959,"earliestYearBP":49959,"earliestYearCE":-48009,"mostRecentYear":0,"mostRecentYearBP":0,"mostRecentYearCE":1950,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Salar de Uyuni"}],"studyCode":null,"studyName":"Salar de Uyuni, Bolivia Drill Hole 50KYR Natural Gamma Radiation","studyNotes":"Natural gamma radiation (counts per second) from a drill hole \nin the Salar de Uyuni, Bolivia, salt flat, used as a proxy \nfor Lake Level over the past 50,000 years.  Mud units contain \nabundant radiogenic K, U, and Th, whereas salt units are \nlargely nonradioactive. \n\nNote:  Adjusted depths match gamma log data with the \nequivalent depths in the sediment core - see Fritz et al. 2004 \nfor additional information. \n","version":"1.0","xmlId":"8845"}