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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":"2016-10-18","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-20368.xml","doi":null,"earliestYearBP":3338,"earliestYearCE":-1388,"entryId":"noaa-lake-20368","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"EAR 1405072, EAR 1023547"},{"fundingAgency":"National Natural Science Foundation China","fundingGrant":"41150110153 "}],"investigators":"Bird, B.W.; Lei, Y.; Perello, M.; Polissar, P.J.; Yao, T.; Finney, B.P.; Bain, D.J.; Pompeani, D.P.; Thompson, L.G.","mostRecentYearBP":-49,"mostRecentYearCE":1999,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/20368","originalSource":null,"publication":[{"abstract":"Sedimentological and geochemical results from Nir'pa Co, an alpine lake on the southeastern Tibetan Plateau, detail late-Holocene Indian summer monsoon (ISM) hydroclimate during the last 3300 years. Constrained by modern calibration, elevated silt and lithics and low sand and clay between 3.3 and 2.4 ka and 1.3 ka and the present indicate two pluvial phases with lake levels near their current overflow elevation. Between 2.4 and 1.3 ka, a sharp increase in sand and corresponding decrease in lithics and silt suggest drier conditions and lower lake levels at Nir'pa Co. Hydroclimate expressions in the sedimentological proxies during the Medieval Climate Anomaly (MCA) and 'Little Ice Age’ (LIA) are not statistically significant, suggesting that these events were minor compared to the millennial scale variability on which they were superimposed. However, decreasing sand and increasing lithics and silt during the MCA between 950 and 800 cal. yr BP may suggest briefly wetter conditions, while increasing sand and reduced lithics and silt from 500 to 200 cal. yr BP suggest potentially drier conditions during the LIA. Similarities with regional records from lake sediment and ice cores and speleothem records from the central and eastern Tibetan Plateau, India, and the Arabian Sea, suggest generally coherent late-Holocene ISM variability in these regions. Increased late-Holocene ISM intensity occurred during times when Tibetan Plateau surface air temperatures were warmer, Indo-Pacific sea surface temperatures were elevated, and the tropical Pacific was in a La Niña-like mean state. Conversely, aridity between 2.4 and 1.3 ka occurred in concert with cooling on the Tibetan Plateau and in the Indo-Pacific with more El Niño-like conditions in the tropical Pacific. Differences with western Tibetan records may reflect a weakened ISM and stronger westerlies in this region during the late-Holocene. ","author":{"name":"Broxton W. Bird, Yanbin Lei, Melanie Perello, Pratigya J. Polissar, Tandong Yao, Bruce Finney, Daniel Bain, David Pompeani and Lonnie G. Thompson"},"citation":"Broxton W. Bird, Yanbin Lei, Melanie Perello, Pratigya J. Polissar, Tandong Yao, Bruce Finney, Daniel Bain, David Pompeani and Lonnie G. Thompson. 2016. Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet. The Holocene. . doi: 10.1177/0959683616670220","edition":null,"identifier":{"id":"10.1177/0959683616670220","type":"doi","url":"http://dx.doi.org/10.1177/0959683616670220"},"issue":null,"journal":"The Holocene","pages":null,"pubRank":"1","pubYear":2016,"reportNumber":null,"title":"Late-Holocene Indian summer monsoon variability revealed from a 3300-year-long lake sediment record from Nir'pa Co, southeastern Tibet","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"56823","geo":{"geoType":"Feature","geometry":{"coordinates":["29.734","92.386"],"type":"POINT"},"properties":{"easternmostLongitude":"92.386","maxElevationMeters":"4775","minElevationMeters":"4775","northernmostLatitude":"29.734","southernmostLatitude":"29.734","westernmostLongitude":"92.386"}},"locationName":"Continent>Asia>Eastern Asia>China","mappable":"Y","paleoData":[{"NOAADataTableId":"31055","coreLengthMeters":0,"dataFile":[{"NOAAKeywords":["earth 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science>paleoclimate>paleolimnology>magnetic susceptibility"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017ms-a15.txt","linkText":"Nir'pa Co Magnetic Susceptibility Data, Core A-15","urlDescription":"Data File","variables":[{"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":"x10-5 units; Core A-15","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless (SI system)","cvWhat":"magnetic property>magnetic moments>magnetic susceptibility>volume magnetic susceptibility"}]}],"dataTableName":"NirpaCo2017MS-A15","dataTableNotes":null,"earliestYear":3338,"earliestYearBP":3338,"earliestYearCE":-1388,"mostRecentYear":128,"mostRecentYearBP":128,"mostRecentYearCE":1822,"species":[],"timeUnit":"cal yr BP"},{"NOAADataTableId":"31371","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/tibet/nirpaco2017opal.txt","linkText":"Nir'pa Co Biogenic Opal Data","urlDescription":"Data File","variables":[{"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":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":"Weight % (2.4 x Si)","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"spectrophotometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"}]}],"dataTableName":"NirpaCo2017opal","dataTableNotes":null,"earliestYear":2931,"earliestYearBP":2931,"earliestYearCE":-981,"mostRecentYear":-37,"mostRecentYearBP":-37,"mostRecentYearCE":1987,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Nir'pa Co"}],"studyCode":null,"studyName":"Nir'pa Co, Tibet 3,300 Year Geochemical and Physical Properties Data","studyNotes":"Sediment geochemical and physical properties data from two cores collected in Nir'pa Co, Tibet for the past 3,300 years.  Measured parameters include: Dry bulk density, Total organic matter, Biogenic Opal, C-N, d13C, d15N, clay/silt/sand, Magnetic susceptibility, and XRF mineralogy.","version":"1.0","xmlId":"18165"}