{"NOAAStudyId":"11174","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":"2011-05-21","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-11174.xml","doi":null,"earliestYearBP":2227,"earliestYearCE":-277,"entryId":"noaa-lake-11174","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":null}],"investigators":"Bird, B.W.; Abbott, M.B.; Vuille, M.; Rodbell, D.; Stansell, N.D.; Rosenmeier, M.F.","mostRecentYearBP":-57,"mostRecentYearCE":2007,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/11174","originalSource":null,"publication":[{"abstract":"Decadal and centennial mean state changes in South American \r\nsummer monsoon (SASM) precipitation during the last 2,300 years \r\nare detailed using an annually resolved authigenic calcite record \r\nof precipitation d18O from a varved lake in the Central Peruvian \r\nAndes. This unique sediment record shows that d18O peaked during \r\nthe Medieval Climate Anomaly (MCA) from A.D. 900 to 1100, \r\nproviding evidence that the SASM weakened considerably during \r\nthis period. Minimum d18O values occurred during the Little Ice \r\nAge (LIA) between A.D. 1400 and 1820, reflecting a prolonged \r\nintensification of the SASM that was regionally synchronous. \r\nAfter the LIA, d18O increased rapidly, particularly during \r\nthe current warm period (CWP; A.D. 1900 to present), indicating \r\na return to reduced SASM precipitation that was more abrupt and \r\nsustained than the onset of the MCA. Diminished SASM precipitation \r\nduring the MCA and CWP tracks reconstructed Northern Hemisphere \r\nand North Atlantic warming and a northward displacement of \r\nthe Intertropical Convergence Zone (ITCZ) over the Atlantic, \r\nand likely the Pacific. Intensified SASM precipitation during \r\nthe LIA follows reconstructed Northern Hemisphere and North \r\nAtlantic cooling, El Niño-like warming in the Pacific, \r\nand a southward displacement of the ITCZ over both oceans. \r\nThese results suggest that SASM mean state changes are sensitive \r\nto ITCZ variability as mediated by Western Hemisphere tropical \r\nsea surface temperatures, particularly in the Atlantic. \r\nContinued Northern Hemisphere and North Atlantic warming \r\nmay therefore help perpetuate the recent reductions in SASM \r\nprecipitation that characterize the last 100 years, \r\nwhich would negatively impact Andean water resources. ","author":null,"citation":"Bird, B.W., M.B. Abbott, M. Vuille, D.T. Rodbell, N.D. Stansell, \r\nand M.F. Rosenmeier. 2011. \r\nA 2,300-year-long annually resolved record of the South American \r\nsummer monsoon from the Peruvian Andes. \r\nProceedings of the National Academy of Sciences, \r\nVol. 108 (21), pp. 8583-8588, May 24, 2011.  \r\ndoi:10.1073/pnas.1003719108 ","edition":null,"identifier":{"id":"10.1073/pnas.1003719108","type":"doi","url":"http://dx.doi.org/10.1073/pnas.1003719108"},"issue":null,"journal":"Proceedings of the National Academy of Sciences","pages":null,"pubRank":"1","pubYear":2011,"reportNumber":null,"title":"A 2,300-year-long annually resolved record of the South American  summer monsoon from the Peruvian Andes","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["PAGES LOTRED SA2k","PAGES 2k Network","Monsoon"],"site":[{"NOAASiteId":"48119","geo":{"geoType":"Feature","geometry":{"coordinates":["-10.7002","-76.0605"],"type":"POINT"},"properties":{"easternmostLongitude":"-76.0605","maxElevationMeters":"4300","minElevationMeters":"4300","northernmostLatitude":"-10.7002","southernmostLatitude":"-10.7002","westernmostLongitude":"-76.0605"}},"locationName":"Continent>South America>Peru","mappable":"Y","paleoData":[{"NOAADataTableId":"19748","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes","earth science>paleoclimate>paleolimnology>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/peru/pumacocha2011.txt","linkText":"pumacocha2011.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>collection date"},{"cvAdditionalInfo":null,"cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Character","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"sampling metadata>collection date"},{"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":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"sampling metadata>collection water depth"},{"cvAdditionalInfo":"sediment trap data","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate>calcite","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"sediment trap data","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate>calcite","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":"surface water","cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"},{"cvAdditionalInfo":"surface water","cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 2H"},{"cvAdditionalInfo":null,"cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"sampling metadata>collection water depth"},{"cvAdditionalInfo":null,"cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>lake water","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"milligram per liter","cvWhat":"chemical composition>solution property>alkalinity"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>oxygen isotopes","earth science>paleoclimate>paleolimnology>carbon isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/southamerica/peru/pumacocha2011.xls","linkText":"pumacocha2011.xls","urlDescription":"Data","variables":[]}],"dataTableName":"A-05","dataTableNotes":null,"earliestYear":-277,"earliestYearBP":2227,"earliestYearCE":-277,"mostRecentYear":2007,"mostRecentYearBP":-57,"mostRecentYearCE":2007,"species":[],"timeUnit":"AD"}],"siteName":"Laguna Pumacocha"}],"studyCode":null,"studyName":"Laguna Pumacocha, Peru, 2300 Year Stable Isotope Data ","studyNotes":"Sediment stable isotope and limnological data from Laguna \nPumacocha, Peru, spanning the last 2300 years. ","version":"1.0","xmlId":"9594"}