{"NOAAStudyId":"8628","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":"2009-07-01","dataPublisher":"NOAA","dataType":"SPELEOTHEMS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/speleothem","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-cave-8628.xml","doi":null,"earliestYearBP":702,"earliestYearCE":1248,"entryId":"noaa-cave-8628","funding":[],"investigators":"Tan, L.; Cai, Y.; Cheng, H.; An, Z.","mostRecentYearBP":-32,"mostRecentYearCE":1982,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/8628","originalSource":null,"publication":[{"abstract":"A 2-3-year resolution record of stalagmite oxygen isotope variations from the south flank of the Qinling Mountains, central China, has revealed the Asian summer monsoon (ASM) precipitation variations in the investigated area over the past 750 years. The summer monsoon precipitation gradually increased since 1249 AD, reaching its highest values in the period 1535-1685 AD, and then decreased with substantial decadal- to centennial-scale fluctuations. The monsoon precipitation increased again between 1920 and 1970 AD. Three intervals of high monsoon precipitation were identified: 1535-1685 AD, 1755-1835 AD, and 1920-1970 AD. Three intervals of low precipitation were inferred in 1249-1325 AD, 1390-1420 AD, and 1890-1915 AD. The d18O composition and lithological features of the stalagmite coincidently indicate a wetter climate during the Little Ice Age (LIA), which is also confirmed by climate records from Chinese historical documents within this area. A comparison with other high-resolution speleothem records indicates regional differences in monsoon precipitation variability from the south to the north of central China in the last 750 years on decadal- to centennial-scale. Power spectrum analysis of the d18O record shows significant 117.8-, 34.6-, 14-, 10.3-, and ~ 6-year periodicities. These periodicities are widely observed in the climate records from ASM-controlled areas of China and are consistent with the Gleissburg periodicity, Bruckner periodicity, sunspot periodicity of solar activity, and El Nino-Southern Oscillation (ENSO) periodicity. These correlations suggest that both solar activity and ENSO periodicity may have had important influences on ASM precipitation in China over the past 750 years.","author":null,"citation":"Tan, L., Cai, Y., Cheng, H., An, Z. 2009. Summer monsoon precipitation variations in central China over the past 750 years derived from a high-resolution absolute-dated stalagmite. Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 280, Issues 3-4, pp. 432-439, 15 September 2009","edition":null,"identifier":null,"issue":null,"journal":"Palaeogeography, Palaeoclimatology, Palaeoecology","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"Summer monsoon precipitation variations in central China over the past 750 years derived from a high-resolution absolute-dated stalagmite","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"22933","geo":{"geoType":"Feature","geometry":{"coordinates":["33.133","106.3"],"type":"POINT"},"properties":{"easternmostLongitude":"106.3","maxElevationMeters":"870","minElevationMeters":"870","northernmostLatitude":"33.133","southernmostLatitude":"33.133","westernmostLongitude":"106.3"}},"locationName":"Continent>Asia>Eastern Asia>China","mappable":"Y","paleoData":[{"NOAADataTableId":"12490","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/dayu2009.txt","linkText":"dayu2009.txt","urlDescription":"Speleothem","variables":[{"cvAdditionalInfo":null,"cvDataType":"SPELEOTHEMS","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":"SPELEOTHEMS","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"SPELEOTHEMS","cvDetail":"raw","cvError":null,"cvFormat":"Numeric","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"DY-1","dataTableNotes":null,"earliestYear":1248,"earliestYearBP":702,"earliestYearCE":1248,"mostRecentYear":1982,"mostRecentYearBP":-32,"mostRecentYearCE":1982,"species":[],"timeUnit":"AD"}],"siteName":"Dayu Cave"}],"studyCode":null,"studyName":"Tan et al. 2009 Dayu Cave, China 750 Year Stalagmite d18O Data","studyNotes":null,"version":"1.0","xmlId":"2149"}