{"NOAAStudyId":"22548","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":"2017-08-23","dataPublisher":"NOAA","dataType":"TREE RING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/tree-ring","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-22548.xml","doi":"https://doi.org/10.25921/hqcg-gy96","earliestYearBP":207,"earliestYearCE":1743,"entryId":"noaa-tree-22548","funding":[{"fundingAgency":"Japan Society for the Promotion of Science (JSPS)","fundingGrant":"19253001, 2310262, and 23242047"},{"fundingAgency":"Japan Research Institute for Humanity and Nature","fundingGrant":null}],"investigators":"Sano, M.; Tshering, P.; Komori, J.; Fujita, K.; Xu, C.; Nakatsuka, T.","mostRecentYearBP":-61,"mostRecentYearCE":2011,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22548","originalSource":null,"publication":[{"abstract":"We developed a 50-year tree ring d18O chronology for each of three tree species (Juniperus indica, Larix griffithii, and Picea spinulosa) using a total of 12 trees (four trees per species) from the Bhutan Himalaya. Despite originating from different species sampled at two different altitudes, the d18O chronologies are highly correlated with one another (r = 0.76-0.89). Response analyses reveal that tree ring d18O values are controlled mainly by summer precipitation, irrespective of species. Based on these results, a robust 269-year d18O chronology was established to reconstruct the amount of May-September precipitation based on data from four larch trees. Our tree ring d18O data show significant correlations with those from other regions of the Himalaya and the Tibetan Plateau, indicating that common signals related to monsoon activity are recorded in the data. However, at centennial timescales, our data from Bhutan show normal conditions during the 20th century, whereas records from sites in western Nepal and the southern/eastern Tibetan Plateau show weakening trends in monsoon intensity during the last 100-200 years; the weakening trends may be the result of a reduction in the meridional sea surface temperature gradient in the Indian Ocean during this time. At continental scales, the tree ring records show that areas more from ocean basins are particularly sensitive to reduced monsoon circulation. Correlation analyses suggest that the El Niño-Southern Oscillation (ENSO) plays an important role in modulating summer precipitation. However, the teleconnected relationship disappears during the period 1951-1970, coinciding with a negative phase of the Pacific Decadal Oscillation (PDO), implying interdecadal modulation of the PDO on the influence of the ENSO on precipitation in Bhutan.","author":{"name":"Masaki Sano, Phuntsho Tshering, Jiro Komori, Koji Fujita, Chenxi Xu, Takeshi Nakatsuka"},"citation":"Masaki Sano, Phuntsho Tshering, Jiro Komori, Koji Fujita, Chenxi Xu, Takeshi Nakatsuka. 2013. May-September precipitation in the Bhutan Himalaya since 1743 as reconstructed from tree ring cellulose d18O. Journal of Geophysical Research: Atmospheres, 118(15), 8399-8410. doi: 10.1002/jgrd.50664","edition":null,"identifier":{"id":"10.1002/jgrd.50664","type":"doi","url":"http://dx.doi.org/10.1002/jgrd.50664"},"issue":"15","journal":"Journal of Geophysical Research: Atmospheres","pages":"8399-8410","pubRank":"1","pubYear":2013,"reportNumber":null,"title":"May-September precipitation in the Bhutan Himalaya since 1743 as reconstructed from tree ring cellulose d18O","type":"publication","volume":"118"}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"57412","geo":{"geoType":"Feature","geometry":{"coordinates":["27.983","90"],"type":"POINT"},"properties":{"easternmostLongitude":"90","maxElevationMeters":"3500","minElevationMeters":"3500","northernmostLatitude":"27.983","southernmostLatitude":"27.983","westernmostLongitude":"90"}},"locationName":"Continent>Asia>Southcentral Asia>Bhutan","mappable":"Y","paleoData":[{"NOAADataTableId":"33651","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/asia/bhutan/wache2013d18o.txt","linkText":"Wache Tree Ring Oxygen Isotope Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","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":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose>alpha cellulose","cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"Wache2013d18O","dataTableNotes":null,"earliestYear":1743,"earliestYearBP":207,"earliestYearCE":1743,"mostRecentYear":2011,"mostRecentYearBP":-61,"mostRecentYearCE":2011,"species":[{"commonName":["Himalayan larch"],"scientificName":"Larix griffithiana (Lindl. & Gord.) Carr.","speciesCode":"LAGR"}],"timeUnit":"AD"}],"siteName":"Wache"}],"studyCode":"IITRDB27","studyName":"Wache, Bhutan 269 Year Tree Ring Oxygen Isotope Data","studyNotes":"Larix griffithii tree-ring oxygen isotope (d18O) data from Wache, Lunana, Bhutan, for the past 269  years. IITRDB27","version":"1.0","xmlId":"20716"}