noaa-tree-14790 Anchukaitis - Firth River 1236 - PCGL - ITRDB AK132 Anchukaitis, K.J.; D'Arrigo, R.D.; Frank, D.C.; Andreu-Hayles, L.; Buckley, B.M. Anchukaitis - Firth River 1236 - PCGL - ITRDB AK132 2013-08-19 NCDC-Paleoclimatology ONLINE Files 10.25921/qpt3-m390 https://www.ncdc.noaa.gov/paleo/study/14790 Investigator K.J. Anchukaitis Investigator R.D. D'Arrigo Investigator D.C. Frank Investigator L. Andreu-Hayles Investigator B.M. 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earth science paleoclimate tree ring total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: 1236601b; earth science paleoclimate tree ring total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: 1236701a; earth science paleoclimate tree ring total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: 1236703b; earth science paleoclimate tree ring total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: 1236705c; earth science paleoclimate tree-ring density geoscientificInformation PCGL Picea glauca (Moench) Voss white spruce 1073 AD 2002 AD 877 cal yr BP -52 cal yr BP Complete 68.65 68.65 -141.63 -141.63 790 790 Continent North America United States Of America Alaska Firth River 1236>LATITUDE 68.65>LONGITUDE -141.63 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Kevin J. Anchukaitis, Rosanne D. D'Arrigo, Laia Andreu-Hayles, David Frank, Anne Verstege, Ashley Curtis, Brendan M. Buckley, Gordon C. Jacoby, Edward R. Cook. 2013. Tree-Ring-Reconstructed Summer Temperatures from Northwestern North America during the Last Nine Centuries. Journal of Climate, Vol. 26, Issue 10, pp. 3001-3012. DOI: 10.1175/JCLI-D-11-00139.1

Northwestern North America has one of the highest rates of recent temperature increase in the world, but the putative "divergence problem" in dendroclimatology potentially limits the ability of tree-ring proxy data at high latitudes to provide long-term context for current anthropogenic change. Here, summer temperatures are reconstructed from a Picea glauca maximum latewood density (MXD) chronology that shows a stable relationship to regional temperatures and spans most of the last millennium at the Firth River in northeastern Alaska. The warmest epoch in the last nine centuries is estimated to have occurred during the late twentieth century, with average temperatures over the last 30 yr of the reconstruction developed for this study [1973-2002 in the Common Era (CE)] approximately 1.3° ± 0.4°C warmer than the long-term preindustrial mean (1100-1850 CE), a change associated with rapid increases in greenhouse gases. Prior to the late twentieth century, multidecadal temperature fluctuations covary broadly with changes in natural radiative forcing. The findings presented here emphasize that tree-ring proxies can provide reliable indicators of temperature variability even in a rapidly warming climate. STUDY NOTES: Firth River 1236, Alaska - ak132 # Additional Site Information # Kevin J. Anchukaitis, Rosanne D. D'Arrigo, David Frank, Laia Andreu-Hayles, Brendan M. Buckley # # Purpose of Collection: # Climatology - temperature analyses # # # Cores Stored at: # Original wood samples archived at Lamont Doherty Earth Observatory NOAA Template Raw Measurements file added 2019-02-08.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak132x-noaa.rwl Raw Measurements - NOAA Template File; ak132x-noaa.rwl GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak132x.rwl GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/ak132.txt USA/NOAA DIF Version 9.8.4 2019-02-13 2019-02-13