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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."},"dataType":"TREE RING","investigators":"Wiles, G.; Jarvis, S.K.; D'Arrigo, R.D.","investigatorDetails":[{"firstName":"Greg","lastName":"Wiles","initials":"G.","orcId":"0000-0001-7977-5383"},{"firstName":"Stephanie","lastName":"Jarvis","initials":"S.K.","orcId":null},{"firstName":"Rosanne","lastName":"D'Arrigo","initials":"R.D.","orcId":"0000-0002-9797-0796"}],"version":"1.0","funding":[],"studyNotes":" NOAA Template Chronology file added 2018-12-20. 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Carriere) along the Gulf of Alaska","journal":"Arctic, Antarctic, and Alpine Research","volume":"45","edition":null,"issue":"2","pages":"211-218","reportNumber":null,"citation":"Jarvis, S.K., Wiles, G.C., Appleton, S.N., D'Arrigo, R.D. and Lawson, D.E. 2013. A warming-induced biome shift detected in tree growth of Mountain Hemlock (Tsuga mertensiana (Bong.) Carriere) along the Gulf of Alaska. Arctic, Antarctic, and Alpine Research, 45(2), 211-218. doi: 10.1657/1938-4246-45.211","type":"publication","identifier":{"type":"doi","id":"10.1657/1938-4246-45.211","url":"http://dx.doi.org/10.1657/1938-4246-45.211"},"abstract":"Recent observations of divergence between tree growth at high-latitude sites and temperature, as well as the decline of yellow cedar [Callitropsis nootkatensis (D. Don) Oerst. ex D.P. Little] in southeast Alaska due to warming, emphasize a need to investigate nonstationary climate response of Alaskan coastal forests to warming in other tree species.Comparison of annual tree growth in mountain hemlock [Tsuga mertensiana (Bong.)Carriere] to mean monthly temperature and precipitation data from Sitka, Alaska, from A.D. 1830s to 1990s along an elevational transect reveals nonstationarity in tree growth response to climate that suggests an ongoing biome shift.  We observe a marked weakening in the positive relationship between annual growth and warmer growth season temperatures at low-elevation hemlock sites, and a concurrent increase in growth and sensitivity at higher elevations coupled with increased correlation between growth and April precipitation at all sites along our transects. 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