{"NOAAStudyId":"25570","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":"2018-11-20","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-25570.xml","doi":"https://doi.org/10.25921/c3qh-2h10","earliestYearBP":7950,"earliestYearCE":-6000,"entryId":"noaa-tree-25570","funding":[{"fundingAgency":"National Science Foundation of China ","fundingGrant":"41630750"},{"fundingAgency":"US National Science Foundation","fundingGrant":"1241930"},{"fundingAgency":"Swiss National Science Foundation","fundingGrant":"Early Post.doc Mobility"}],"investigators":"Zhao, S.; Pederson, N.; D'Orangeville, L.; HilleRisLambers, J.; Boose, E.; Penone, C.; Bauer, B.A.; Jiang, Y.; Manzanedo, R.D.","mostRecentYearBP":-65,"mostRecentYearCE":2015,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/25570","originalSource":null,"publication":[{"abstract":"Aim\r\n\r\nThe International Tree-Ring Data Bank (ITRDB) is the most comprehensive database of tree growth. To evaluate its usefulness and improve its accessibility to the broad scientific community, we aimed to: (a) quantify its biases, (b) assess how well it represents global forests, (c) develop tools to identify priority areas to improve its representativity, and d) make available the corrected database.\r\n\r\n\r\nLocation\r\nWorldwide.\r\n\r\nTime period\r\nContributed datasets between 1974 and 2017.\r\n\r\nMajor taxa studied\r\nTrees.\r\n\r\nMethods\r\nWe identified and corrected formatting issues in all individual datasets of the ITRDB. We then calculated the representativity of the ITRDB with respect to species, spatial coverage, climatic regions, elevations, need for data update, climatic limitations on growth, vascular plant diversity, and associated animal diversity. We combined these metrics into a global Priority Sampling Index (PSI) to highlight ways to improve ITRDB representativity.\r\n\r\nResults\r\nOur refined dataset provides access to a network of >52 million growth data points worldwide. We found, however, that the database is dominated by trees from forests with low diversity, in semi-arid climates, coniferous species, and in western North America. Conifers represented 81% of the ITRDB and even in well-sampled areas, broadleaves were poorly represented. Our PSI stressed the need to increase the database diversity in terms of broadleaf species and identified poorly represented regions that require scientific attention. Great gains will be made by increasing research and data sharing in African, Asian, and South American forests.\r\n\r\nMain conclusions\r\nThe extensive data and coverage of the ITRDB show great promise to address macroecological questions. To achieve this, however, we have to overcome the significant gaps in the representativity of the ITRDB. A strategic and organized group effort is required, and we hope the tools and data provided here can guide the efforts to improve this invaluable database.","author":{"name":"Shoudong Zhao, Neil Pederson, Loïc D'Orangeville, Janneke HilleRisLambers, Emery Boose, Caterina Penone, Bruce Bauer, Yuan Jiang, Rubén D. Manzanedo"},"citation":"Shoudong Zhao, Neil Pederson, Loïc D'Orangeville, Janneke HilleRisLambers, Emery Boose, Caterina Penone, Bruce Bauer, Yuan Jiang, Rubén D. Manzanedo. 2019. The International Tree‐Ring Data Bank (ITRDB) revisited: Data\r\navailability and global ecological representativity. Journal of Biogeography, 46(2), 355-368. doi: 10.1111/jbi.13488","edition":null,"identifier":{"id":"10.1111/jbi.13488","type":"doi","url":"http://dx.doi.org/10.1111/jbi.13488"},"issue":"2","journal":"Journal of Biogeography","pages":"355-368","pubRank":"1","pubYear":2019,"reportNumber":null,"title":"The International Tree‐Ring Data Bank (ITRDB) revisited: Data\r\navailability and global ecological representativity","type":"publication","volume":"46"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"22723","geo":{"geoType":"Feature","geometry":{"coordinates":["-90","90","-180","180"],"type":"POLYGON"},"properties":{"easternmostLongitude":"180","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"90","southernmostLatitude":"-90","westernmostLongitude":"-180"}},"locationName":"Geographic Region>Global","mappable":"N","paleoData":[{"NOAADataTableId":"37493","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/zhao2018/AppendixS1.zip","linkText":"Appendix S1","urlDescription":"ZIP File","variables":[]}],"dataTableName":"Zhao2018","dataTableNotes":null,"earliestYear":-6000,"earliestYearBP":7950,"earliestYearCE":-6000,"mostRecentYear":2015,"mostRecentYearBP":-65,"mostRecentYearCE":2015,"species":[],"timeUnit":"AD"}],"siteName":"Global"}],"studyCode":null,"studyName":"The International Tree-Ring Data Bank (ITRDB) Revisited","studyNotes":"Harmonized and corrected version of the ITRDB measurements files","version":"1.0","xmlId":"23754"}