{"NOAAStudyId":"14729","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":"2013-05-22","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-14729.xml","doi":"https://doi.org/10.25921/1c8j-4a94","earliestYearBP":388,"earliestYearCE":1562,"entryId":"noaa-tree-14729","funding":[],"investigators":"Wiles, G.; Jarvis, S.K.; D'Arrigo, R.D.","mostRecentYearBP":-59,"mostRecentYearCE":2009,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/14729","originalSource":null,"publication":[{"abstract":"Recent observations of divergence between tree growth at high-latitude sites and temperature,\r\nas well as the decline of yellow cedar [Callitropsis nootkatensis (D. Don) Oerst. ex D.P. Little] \r\nin southeast Alaska due to warming, emphasize a need to investigate nonstationary climate response \r\nof Alaskan coastal forests to warming in other tree species.\r\nComparison of annual tree growth in mountain hemlock [Tsuga mertensiana (Bong.)Carriere] \r\nto mean monthly temperature and precipitation data from Sitka, Alaska, from A.D. 1830s to 1990s \r\nalong an elevational transect reveals nonstationarity in tree growth response to climate \r\nthat suggests an ongoing biome shift.  We observe a marked weakening in the positive relationship \r\nbetween annual growth and warmer growth season temperatures at low-elevation hemlock sites, \r\nand a concurrent increase in growth and sensitivity at higher elevations coupled with increased \r\ncorrelation between growth and April precipitation at all sites along our transects. As previously \r\nobserved with yellow cedar, the mechanism of the hemlock biome shift may be due to an increased \r\nsusceptibility of roots to damage from late frosts resulting from earlier seasonal loss of protective snowpack.","author":null,"citation":"Jarvis, S.K., Wiles, G.C., Appleton, S.N., D'Arrigo, R.D. and Lawson, D.E. 2013. \r\nA warming-induced biome shift detected in tree growth of Mountain Hemlock \r\n(Tsuga mertensiana (Bong.) Carriere) along the Gulf of Alaska. \r\nArctic, Antarctic and Alpine Research, Vol. 45, No. 2, pp. 211-218. \r\nDOI: 10.1657/1938-4246-45.211.","edition":null,"identifier":{"id":"10.1657/1938-4246-45.211.","type":"doi","url":"http://dx.doi.org/10.1657/1938-4246-45.211."},"issue":null,"journal":"Arctic, Antarctic, and Alpine Research","pages":null,"pubRank":"1","pubYear":2013,"reportNumber":null,"title":"A warming-induced biome shift detected in tree growth of Mountain Hemlock  (Tsuga mertensiana (Bong.) Carriere) along the Gulf of Alaska","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["temperature"],"site":[{"NOAASiteId":"55189","geo":{"geoType":"Feature","geometry":{"coordinates":["58.6167","-135.8667"],"type":"POINT"},"properties":{"easternmostLongitude":"-135.8667","maxElevationMeters":"720","minElevationMeters":"720","northernmostLatitude":"58.6167","southernmostLatitude":"58.6167","westernmostLongitude":"-135.8667"}},"locationName":"Continent>North America>United States Of America>Alaska","mappable":"Y","paleoData":[{"NOAADataTableId":"24795","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/ak128.txt","linkText":"ak128.txt","urlDescription":"Correlation Stats","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring 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