{"NOAAStudyId":"22549","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":"2018-01-18","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-22549.xml","doi":"https://doi.org/10.25921/xxcd-4236","earliestYearBP":183,"earliestYearCE":1767,"entryId":"noaa-tree-22549","funding":[],"investigators":"Sano, M.; Dimri, A.P.; Ramesh, R.; Xu, C.; Li, Z.; Nakatsuka, T.","mostRecentYearBP":-58,"mostRecentYearCE":2008,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22549","originalSource":null,"publication":[{"abstract":"The oxygen isotope ratio (d18O) of tree-ring cellulose is known to be a reliable proxy for hydroclimate in monsoon Asia. However, tree-ring d18O data are still spatially and temporally limited, so a denser tree-ring network in Asia is required to better understand the dynamics of the monsoon circulation and its past variability. Here, we present a 242-year d18O chronology calculated from five silver fir trees collected in the western (Indian) Himalaya, a region located on the northwestern periphery of the summer monsoon incursions. Response analyses using regionalized climatic data revealed that tree-ring d18O is controlled by hydroclimatic variables, including precipitation, relative humidity, and the drought index, during the summer monsoon season. In addition, spatial correlation analyses with gridded climatic parameters showed that the strongest correlations of tree-ring d18O are not observed with the climatic parameters at the sampling site, but with those in a region several hundred kilometers to the southwest, indicating that water vapor originating in the Arabian Sea is transported to the study site. Based on these results, we reconstructed the self-calibrating Palmer Drought Severity Index (scPDSI) for the summer monsoon season (June-September) over the past 242 years (1767-2008 CE), using a linear regression model that accounts for 45.0% of the actual scPDSI variance. Our chronology showed significant correlations with other tree-ring d18O data from Nepal and Bhutan, indicating that common signals related to the moisture supply from the Bay of Bengal are also recorded in the present reconstruction. However, the tree-ring record from India often showed weak correlations with that from Bhutan, especially when the summer monsoon was relatively weak. This result, together with the fact that the water vapor at the tree site was also derived from the Arabian Sea, implies that a weaker monsoon circulation enhances the flux of Arabian Sea moisture and reduces the flux of Bay of Bengal moisture to the study region.","author":{"name":"Masaki Sano, A.P. Dimri, R. Ramesh, Chenxi Xu, Zhen Li, Takeshi Nakatsuka"},"citation":"Masaki Sano, A.P. Dimri, R. Ramesh, Chenxi Xu, Zhen Li, Takeshi Nakatsuka. 2017. Moisture source signals preserved in a 242-year tree-ring d18O chronology in the western Himalaya. Global and Planetary Change, 157, 73-82. doi: 10.1016/j.gloplacha.2017.08.009","edition":null,"identifier":{"id":"10.1016/j.gloplacha.2017.08.009","type":"doi","url":"http://dx.doi.org/10.1016/j.gloplacha.2017.08.009"},"issue":null,"journal":"Global and Planetary Change","pages":"73-82","pubRank":"1","pubYear":2017,"reportNumber":null,"title":"Moisture source signals preserved in a 242-year tree-ring d18O chronology in the western Himalaya","type":"publication","volume":"157"}],"reconstruction":"N","scienceKeywords":["Monsoon"],"site":[{"NOAASiteId":"15277","geo":{"geoType":"Feature","geometry":{"coordinates":["32.27","77.17"],"type":"POINT"},"properties":{"easternmostLongitude":"77.17","maxElevationMeters":"2000","minElevationMeters":"2000","northernmostLatitude":"32.27","southernmostLatitude":"32.27","westernmostLongitude":"77.17"}},"locationName":"Continent>Asia>Southcentral Asia>India>Himachal Pradesh","mappable":"Y","paleoData":[{"NOAADataTableId":"33652","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/asia/india/manali2017d18o.txt","linkText":"Manali Tree Ring Oxygen Isotope Data","urlDescription":"NOAA Template File","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":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"chemical composition>compound>organic compound>organooxygen compound>cellulose","cvMethod":null,"cvSeasonality":"annual","cvShortName":null,"cvUnit":"per mil VSMOW","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O"}]}],"dataTableName":"Manali2017d18O","dataTableNotes":null,"earliestYear":1767,"earliestYearBP":183,"earliestYearCE":1767,"mostRecentYear":2008,"mostRecentYearBP":-58,"mostRecentYearCE":2008,"species":[{"commonName":["Himalayan silver fir","West Himalayan fir"],"scientificName":"Abies pindrow (Royle ex D. Don) Royle","speciesCode":"ABPI"}],"timeUnit":"AD"}],"siteName":"Manali"}],"studyCode":"IITRDB30","studyName":"Manali, NW India 242 Year Tree Ring Oxygen Isotope Data","studyNotes":"Abies pindrow tree-ring oxygen isotope (d18O) data from Manali, northwestern India, for the past 242 years.  IITRDB30","version":"1.0","xmlId":"20718"}