{"NOAAStudyId":"10444","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":"2010-07-08","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-10444.xml","doi":null,"earliestYearBP":69550,"earliestYearCE":-67600,"entryId":"noaa-cave-10444","funding":[{"fundingAgency":"National Natural Science Foundation China","fundingGrant":"40672165, 90511004,40672202"},{"fundingAgency":"Chongqing Science Committee","fundingGrant":"2003-7835"}],"investigators":"Li, T.-Y.; Yuan, D.X.; Li, H-C.; Yang, Y.; Wang, J.L.; Wang, X.Y.; Li, J.Y.; Qin, J.M.; Zhang, M.L.; Lin, Y.S.","mostRecentYearBP":57620,"mostRecentYearCE":-55670,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/10444","originalSource":null,"publication":[{"abstract":"A 26-cm-long stalagmite (XY2) from Xinya Cave in northeastern \nChongqing of China has been ICP-MS 230Th/U dated, showing a \ndepositional hiatus at 2.3 cm depth from the top. The growth \nof the 2.3-26 cm interval determined by four dates was between \n57 ka and 70 ka, with a linear growth rate of 0.023 mm/a.  \nWe have analyzed 190 samples for d18O and d13C, mostly in the \n2.3-26 cm part. The d18O and d13C values between 57 ka and 70 ka \nreveal decadal-to-centennial climatic variability during the \nglacial interval of Marine Isotope Stage 4 (MIS4), exhibiting \nmuch higher resolution than that of the published Hulu and Dongge \nrecords during this interval. Speleothem d18O in eastern China, \nincluding our study area can be used as a proxy of summer monsoon \nstrength, with lighter values pointing to stronger summer monsoon \nand higher precipitation, and vice versa. Two decreases in the \nd18O signature of XY2 record around 59.5 and 64.5 Ka are argued \nto correspond to the Dansgaard-Oeschger (D-O) events 17 and 18 \nrespectively. The Heinrich event 6 (H6) can be identified in the \nrecord as a heavy d18O peak around 60 ka, indicating significant \nweakening of the monsoon in Chongqing during the cold period.\nThe XY2 d18O record shows very rapid change toward to the \ninterstadial condition of the D-O event, but more gradual change \ntoward to the cold stadial condition. This phenomenon found in \nthe Greenland ice core records is rarely observed so clearly in \npreviously published speleothem records. According to SPECMAP \nd18O record, the glacial maximum of MIS 4 was around 64.5 ka \nwith the boundary of MIS 3/4 around 60 ka. Unlike the marine \nrecord, the speleothem record of XY2, China, exhibits much high \nfrequency variations without an apparent glacial maximum during \nMIS 4. However, the timing of MIS 3/4 boundary seems to be around \n60 ka when the H6 terminated, in agreement with the marine \nchronology.  The growth period of sample XY2 during glacial times \nprobably reflects a local karstic routing of water, rather than \nhaving climatic significance. \n\n","author":null,"citation":"Li, T.-Y., D.X. Yuan, H.C. Li, Y. Yang, J.L. Wang, X.Y. Wang, \nJ.Y. Li, J.M. Qin, M.L. Zhang, and Y.S. Lin.  2007. \nHigh-resolution climate variability of southwest China during \n57-70 ka reflected in a stalagmite d18O record from Xinya Cave. \nScience in China Series D: Earth Sciences, Vol. 50, no. 8, \npp. 1202-1208, August 2007. doi: 10.1007/s11430-007-0059-z. \n \n","edition":null,"identifier":{"id":"10.1007/s11430-007-0059-z","type":"doi","url":"http://dx.doi.org/10.1007/s11430-007-0059-z"},"issue":null,"journal":"China Science: Earth Sciences","pages":null,"pubRank":"1","pubYear":2007,"reportNumber":null,"title":"High-resolution climate variability of southwest China during  57-70 ka reflected in a stalagmite d18O record from Xinya Cave","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"37082","geo":{"geoType":"Feature","geometry":{"coordinates":["30.75","109.4667"],"type":"POINT"},"properties":{"easternmostLongitude":"109.4667","maxElevationMeters":"1250","minElevationMeters":"1250","northernmostLatitude":"30.75","southernmostLatitude":"30.75","westernmostLongitude":"109.4667"}},"locationName":"Continent>Asia>Eastern Asia>China","mappable":"Y","paleoData":[{"NOAADataTableId":"19243","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/xinya2007.txt","linkText":"xinya2007.txt","urlDescription":"Speleothem","variables":[{"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":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar kiloyear before present","cvWhat":"age variable>age"},{"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 PDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]},{"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/xinya2007.xls","linkText":"xinya2007.xls","urlDescription":"Speleothem","variables":[]}],"dataTableName":"XY2","dataTableNotes":null,"earliestYear":69550,"earliestYearBP":69550,"earliestYearCE":-67600,"mostRecentYear":57620,"mostRecentYearBP":57620,"mostRecentYearCE":-55670,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Xinya Cave"}],"studyCode":null,"studyName":"Xinya Cave, China Glacial Speleothem Oxygen Isotope Data","studyNotes":"Speleothem oxygen isotope data from a 26-cm-long stalagmite (XY2) \nfrom Xinya Cave in south China.  Stalagmite XY2 is ICP-MS 230Th/U \ndated to between 57 ka and 70 ka. The d18O values reveal decadal-\nto-centennial climatic variability during the glacial interval of \nMarine Isotope Stage 4 (MIS4). Heinrich event 6, and Dansgaard-\nOeschger (D-O) events 17 and 18 can be determined by the XY2 d18O \nrecords, which are higher resolution than previous records in China.\n","version":"1.0","xmlId":"9108"}