{"NOAAStudyId":"5450","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":"2007-01-01","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-5450.xml","doi":null,"earliestYearBP":16453,"earliestYearCE":-14503,"entryId":"noaa-lake-5450","funding":[],"investigators":"Yancheva, G.; Nowaczyk, N.R.; Mingram, J.; Dulski, P.; Schettler, G.; Negendank, J.F.W.; Liu, J.; Sigman, D.M.; Peterson, L.C.; Haug, G.H.","mostRecentYearBP":102,"mostRecentYearCE":1848,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/5450","originalSource":null,"publication":[{"abstract":"The Asian-Australian monsoon is an important component of the Earth's  climate system that influences the societal and economic activity of  roughly half the world's population. The past strength of the rain-bearing  East Asian summer monsoon can be reconstructed with archives such as cave  deposits, but the winter monsoon has no such signature in the hydrological  cycle and has thus proved difficult to reconstruct. Here we present high- resolution records of the magnetic properties and the titanium content of the sediments of Lake Huguang Maar in coastal southeast China over the  past 16,000 years, which we use as proxies for the strength of the winter  monsoon winds. We find evidence for stronger winter monsoon winds before  the Bølling-Allerød warming, during the Younger Dryas episode and during  the middle and late Holocene, when cave stalagmites suggest weaker summer  monsoons.  We conclude that this anticorrelation is best explained by  migrations in the intertropical convergence zone. Similar migrations of the intertropical convergence zone have been observed in Central America  for the period AD 700 to 900, suggesting global climatic changes at that  time. From the coincidence in timing, we suggest that these migrations  in the tropical rain belt could have contributed to the declines of both  the Tang dynasty in China and the Classic Maya in Central America.","author":null,"citation":"Yancheva, G., N.R. Nowaczyk, J. Mingram, P. Dulski, G. Schettler, J.F.W. Negendank, J. Liu, D.M. Sigman, L.C. Peterson, G.H. Haug. 2007. Influence of the intertropical convergence zone on the East Asian monsoon. Nature Vol 445, pp. 74-77, 4 January 2007","edition":null,"identifier":null,"issue":null,"journal":"Nature","pages":null,"pubRank":"1","pubYear":2007,"reportNumber":null,"title":"Influence of the intertropical convergence zone on the East Asian monsoon","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"8887","geo":{"geoType":"Feature","geometry":{"coordinates":["21.15","110.283"],"type":"POINT"},"properties":{"easternmostLongitude":"110.283","maxElevationMeters":"23","minElevationMeters":"23","northernmostLatitude":"21.15","southernmostLatitude":"21.15","westernmostLongitude":"110.283"}},"locationName":"Continent>Asia>Eastern Asia>China","mappable":"Y","paleoData":[{"NOAADataTableId":"7205","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/huguang-maar2007.txt","linkText":"huguang-maar2007.txt","urlDescription":"Data","variables":[{"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":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"count per second","cvWhat":"chemical composition>element or single-element molecule>titanium"},{"cvAdditionalInfo":"smoothed with a 9 point triangular 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spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"count per second","cvWhat":"chemical composition>element or single-element molecule>manganese"},{"cvAdditionalInfo":"units x 10-3","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>manganese/titanium"},{"cvAdditionalInfo":"units x 10-3","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>manganese/iron"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"energy-dispersive x-ray fluorescence spectroscopy","cvSeasonality":null,"cvShortName":null,"cvUnit":"count per second","cvWhat":"chemical composition>element or single-element molecule>sulfur"},{"cvAdditionalInfo":"x10-6 units","cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":"magnetic susceptibility measurement","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless (SI system)","cvWhat":"magnetic property>magnetic moments>magnetic susceptibility>volume magnetic susceptibility"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"magnetic property>magnetic ratios>S-ratio"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>sulfur"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>bulk geological material>sediment","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"milligram per square centimeter per year","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"},{"cvAdditionalInfo":null,"cvDataType":"PALEOLIMNOLOGY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"}]},{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/asia/china/huguang-maar2007.xls","linkText":"huguang-maar2007.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Lake Huguang Maar Core HUGUANG","dataTableNotes":null,"earliestYear":16453,"earliestYearBP":16453,"earliestYearCE":-14503,"mostRecentYear":102,"mostRecentYearBP":102,"mostRecentYearCE":1848,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Lake Huguang Maar"}],"studyCode":null,"studyName":"Lake Huguang Maar 16KYr High Resolution Ti and Magnetic Data","studyNotes":"High resolution titanium and magnetic sediment data from Lake Huguang Maar, \nsoutheast China.","version":"1.0","xmlId":"637"}