{"NOAAStudyId":"11818","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":"2011-07-12","dataPublisher":"NOAA","dataType":"ICE CORES","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/ice-core","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-icecore-11818.xml","doi":null,"earliestYearBP":15,"earliestYearCE":1935,"entryId":"noaa-icecore-11818","funding":[{"fundingAgency":"US NOAA","fundingGrant":"NA04OAR 4600179"},{"fundingAgency":"US National Science Foundation","fundingGrant":"ATM0754644"},{"fundingAgency":"National Natural Science Foundation China","fundingGrant":"40401054, 40121101"},{"fundingAgency":"National Basic Research Program of China","fundingGrant":"2005CB422004"},{"fundingAgency":"Chinese Academy of Sciences","fundingGrant":"KZCX3-SW-339/334"}],"investigators":"Grigholm, B.; Mayewski, P.A.; Kang, S.; Zhang, Y.; Kaspari, S.; Sneed, S.; Zhang, Q.","mostRecentYearBP":-54,"mostRecentYearCE":2004,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/11818","originalSource":null,"publication":[{"abstract":"In autumn 2005, a joint expedition between the University of Maine \r\nand the Institute of Tibetan Plateau Research recovered three ice \r\ncores from Guoqu Glacier (33°34'37.8\"N, 91°10'35.3\"E, 5720 m above \r\nsea level) on the northern side of Mt. Geladaindong, central Tibetan \r\nPlateau.  Isotopes (d18O), major soluble ions (Na+, K+, Mg2+, Ca2+, \r\nCl-, NO3-,SO4 2-), and radionuclide (b-activity) measurements from \r\none of the cores revealed a 70-year record (1935–2005). Statistical \r\nanalysis of major ion time series suggests that atmospheric soluble \r\ndust species dominate the chemical signature and that background dust \r\nlevels conceal marine ion species deposition. The soluble dust time \r\nseries have interspecies relations and common structure (empirical \r\northogonal function (EOF) 1), suggesting a similar soluble dust \r\nsource or transport route. Annual and seasonal correlations between \r\nthe EOF 1 time series and National Centers for Environmental \r\nPrediction/National Center for Atmospheric Research reanalysis \r\nclimate variables (1948–2004) suggest that the Mt. Geladaindong \r\nice core record provides a proxy for local and regional surface \r\npressure. An approximately threefold decrease of soluble dust \r\nconcentrations in the middle to late 1970s, accompanied by regional \r\nincreases in pressure and temperature and decreases in wind velocity, \r\ncoincides with the major 1976-1977 shift of the Pacific Decadal \r\nOscillation (PDO) from a negative to a positive state. This is \r\nthe first ice core evidence of a potential teleconnection between \r\ncentral Asian atmospheric soluble dust loading and the PDO. \r\nAnalysis of temporally longer ice cores from Mt. Geladaindong \r\nmay enhance understanding of the relationship between the PDO \r\nand central Asian atmospheric circulation and subsequent \r\natmospheric soluble dust loading. \r\n","author":null,"citation":"Grigholm, B., P.A. Mayewski, S. Kang, Y. Zhang, S. Kaspari, \r\nS.B. Sneed, and Q. Zhang.  2009. \r\nAtmospheric soluble dust records from a Tibetan ice core: \r\nPossible climate proxies and teleconnection with the \r\nPacific Decadal Oscillation. \r\nJournal of Geophysical Research, 114, D20118, \r\ndoi:10.1029/2008JD011242","edition":null,"identifier":{"id":"10.1029/2008JD011242","type":"doi","url":"http://dx.doi.org/10.1029/2008JD011242"},"issue":null,"journal":"Journal of Geophysical Research: Atmospheres","pages":null,"pubRank":"1","pubYear":2009,"reportNumber":null,"title":"Atmospheric soluble dust records from a Tibetan ice core:  Possible climate proxies and teleconnection with the  Pacific Decadal Oscillation","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"52282","geo":{"geoType":"Feature","geometry":{"coordinates":["33.5772","91.1765"],"type":"POINT"},"properties":{"easternmostLongitude":"91.1765","maxElevationMeters":"5720","minElevationMeters":"5720","northernmostLatitude":"33.5772","southernmostLatitude":"33.5772","westernmostLongitude":"91.1765"}},"locationName":"Continent>Asia","mappable":"Y","paleoData":[{"NOAADataTableId":"20095","coreLengthMeters":47,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guoqu/guoqu2009.txt","linkText":"guoqu2009.txt","urlDescription":"Data","variables":[{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"meter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":null,"cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age>ice age"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>element or single-element molecule>sodium"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>element or single-element molecule>potassium"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>element or single-element molecule>magnesium"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>element or single-element molecule>calcium"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>element or single-element molecule>chlorine>chloride"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>compound>inorganic compound>nitrate"},{"cvAdditionalInfo":"median","cvDataType":"ICE CORES","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"hydrologic material>bulk ice","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"microgram per liter","cvWhat":"chemical composition>compound>inorganic compound>sulfate"}]},{"NOAAKeywords":["earth science>paleoclimate>ice core>chemistry"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guoqu/guoqu2009.xls","linkText":"guoqu2009.xls","urlDescription":"Data","variables":[]}],"dataTableName":"Guoqu2005","dataTableNotes":null,"earliestYear":1935,"earliestYearBP":15,"earliestYearCE":1935,"mostRecentYear":2004,"mostRecentYearBP":-54,"mostRecentYearCE":2004,"species":[],"timeUnit":"AD"}],"siteName":"Guoqu Glacier"}],"studyCode":null,"studyName":"Guoqu Glacier Ice Core, Tibet 70 Year Major Ions Data","studyNotes":"High resolution (Annual Median Concentrations) Na+, K+, Mg2+, \nCa2+, Cl-,NO3-, SO42- from the 2005 Guoqu Glacier ice core \nfrom northern side of Mt. Geladaindong, central Tibetan Plateau. ","version":"1.0","xmlId":"9938"}