noaa-cave-9742 eng; USA utf8 dataset Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact 2018-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) NOAA/WDS Paleoclimatology - Jiuxian Cave, China 19KYr Stalagmite Oxygen Isotope Data 2010-10-07 publication noaa-cave-9742 NCEI DSI 1200_01 Cai, Y. originator Cai, Y. author Tan, L. originator Tan, L. author Cheng, H. originator Cheng, H. author An, Z. originator An, Z. author Edwards, R.L. originator Edwards, R.L. author Kelly, M.J. originator Kelly, M.J. author Kong, X. originator Kong, X. author Wang, X. originator Wang, X. author NOAA National Centers for Environmental Information publisher tableDigital This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Cave. The data include parameters of speleothems with a geographic location of China, Eastern Asia. The time period coverage is from 18958 to -48 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data. Records of past temperature, precipitation, and other aspects of climate derived from mineral deposits found in caves. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations. completed Bauer, Bruce DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce +1 303-497-6280 +1 303-497-6513 325 Broadway, E/CC23 Boulder CO 80305-3328 USA paleo@noaa.gov pointOfContact https://www.ncdc.noaa.gov/c/images/pc-default-cave.png Paleoclimatology - Speleothem PNG Earth Science > Climate Indicators > Paleoclimate Indicators > Land Records > Cave Deposits Earth Science > Climate Indicators > Paleoclimate Indicators > Speleothems Earth Science > Paleoclimate > Land Records > Cave Deposits theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher earth science > paleoclimate > speleothems earth science > paleoclimate > speleothems earth science > paleoclimate > speleothems > oxygen isotopes theme Global Change Master Directory (GCMD) Science Keywords 2018 revision Version 8.6 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords HTTPS Web Browser Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Monsoon theme Continent > Asia > Eastern Asia > China> Jiuxian Cave > LATITUDE 33.5667 > LONGITUDE 109.1 place otherRestrictions Cite as: Cai, Y.; Tan, L.; Cheng, H.; An, Z.; Edwards, R.L.; Kelly, M.J.; Kong, X.; Wang, X. (2010-10-07): NOAA/WDS Paleoclimatology - Jiuxian Cave, China 19KYr Stalagmite Oxygen Isotope Data . [indicate subset used]. NOAA National Centers for Environmental Information. https://www.ncdc.noaa.gov/paleo/study/9742. Accessed [date]. otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. otherRestrictions None otherRestrictions 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. eng; USA geoscientificInformation Date Range: 18958 cal yr BP to -48 cal yr BP; 109.1 109.1 33.5667 33.5667 Study Coordinates 33.5667 109.1 -17008 1998 STUDY NOTES: Oxygen isotope data and U-Th dates from two stalagmites collected in 1999 near the end of Jiuxian Cave, Shaanxi Province, central China. Stalagmite C996-1 is ~32 cm in height and 8-13 cm in diameter, and stalagmite C996-2 is ~21 cm in height and 6-9 cm in diameter. Twenty-three and fifteen 230Th dates were acquired from C996-1 and C996-2, respectively. The chronologies show that C996-1 was continuously deposited through the past 8.5 ka BP, and C996-2 grew through the past 19.0 ka BP, excluding two hiatuses between 8.3 and 5.7 ka BP, and 15.4 and 11.9 ka BP. Temporal resolutions for the d18O measurements vary from 4 to 77 years for C996-1, and from 36 to 112 years for C996-2. Data: 230Th dating results of two stalagmites from Jiuxian cave by ICP-MS. The error is 2sigma error. Lambda230=9.1577×10-6 year-1, Lambda234=2.8263×10-6 year-1 (Cheng et al., 2000), Lambda238=1.55125×10-10 year-1 (Jaffey et al., 1971). Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4±2.2×10-6. Those are the values for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily assumed to be 50%. *a d234U=([234U/238U]activity-1)×1000. *b d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial=d234Umeasured×eLambda234×T. *c BP stands for “Before Present” where the “Present” is defined as the year 1950 AD. ABSTRACT SUPPLIED BY ORIGINATOR: Two stalagmites (C996-1 and C996-2) collected from the Jiuxian Cave in the Shaanxi Province in central China have been studied with U-series dating and stable isotope analysis. Thirty-eight 230Th dating results showed that the stalagmite C996-1 was continuously deposited through the last 8.5 ka BP (thousand years before present, present=1950 AD), and C996-2 was deposited through the last 19 ka BP excluding two growth hiatuses between 8.3 and 5.7 ka BP, and 15.4 and 11.9 ka BP. With a relatively stable boundary condition, we interpret the d18O of speleothem calcite as most indicative of the amount of summer monsoon precipitation, although temperature and other factors might have some minor impact. The d18O records show notable changes within the last glacial maximum (LGM), resembling other East Asian monsoon records such as those from the Hulu and Sanbao Caves, suggesting that significant monsoonal climate changes occurred in eastern Asia as far north as the Qinling Mountains during the LGM interval. A comparison of our records to precisely dated contemporaneous speleothem records from other caves shows that the increasing trend of d18O during the Holocene commenced as early as ~7.5 ka BP in the low-latitude monsoonal area, i.e. the Hoti Cave, while at higher latitudes this shift occurred later, such as ~7.0 ka BP in the Dongge Cave, ~5.3 ka BP in the Heshang Cave, ~4.7 ka BP in the Sanbao Cave and ~4.5 ka BP in the Jiuxian Cave. These results imply an asynchronous change of the summer monsoon precipitation occurred in East Asia during the Holocene. The asynchrony may be related to the responses of a coupled tropical and subtropical monsoon system to changes of the insolation and the differences in thermal forcing, which result from the complex geographical configuration. The variation of sea surface temperature (SST) in the western tropical Pacific may also have important impacts on the summer monsoon precipitation changes in central and northern China because it affects the Northwestern Pacific Subtropical High, a monsoon-front regulator. More robust tests are needed to confirm this phenomenon and to evaluate the contribution of different factors in detail. 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Native Format(s) https://data.nodc.noaa.gov/cgi-bin/iso?id=noaa-cave-9742 HTTPS Landing Page NCEI landing page for this dataset Dataset landing page with general information and links to access the data. information https://www.ncdc.noaa.gov/paleo/study/9742 HTTPS Web Browser NCEI Study Page Study page with dataset access information. search https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/speleothem HTTPS Information NCEI Cave Page General information for this data type. information https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/jiuxian2010.xls HTTPS Download /speleothem/asia/china/jiuxian2010.xls Speleothem download https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/speleothem/cave-jiuxian-c996-2.txt HTTPS Download /syntrace/speleothem/cave-jiuxian-c996-2.txt Speleothem download https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/asia/china/jiuxian2010.txt HTTPS Download /speleothem/asia/china/jiuxian2010.txt Speleothem download https://www1.ncdc.noaa.gov/pub/data/paleo/syntrace/speleothem/cave-jiuxian-c996-1.txt HTTPS Download /syntrace/speleothem/cave-jiuxian-c996-1.txt Speleothem download asNeeded This metadata record was translated from DIF using dif-9x-to-iso-19115-2.xsl Version: 2018-10-25