noaa-tree-1000342 Archambault - Lac Duparquet - THOC - CANA106, PAGES North America 2K Version Archambault, S.; Bergeron, Y. Archambault - Lac Duparquet - THOC - CANA106, PAGES North America 2K Version 2013-04-10 NCDC-Paleoclimatology ONLINE Files 10.25921/wjk8-t474 https://www.ncdc.noaa.gov/paleo/study/1000342 Investigator S. Archambault Investigator Y. Bergeron earth science paleoclimate tree-ring width geoscientificInformation PAGES 2k Network PAGES NAmerica 2k THOC Thuja occidentalis L. northern white-cedar American arborvitae 1200 AD 1987 AD 750 cal yr BP -37 cal yr BP Complete 48.47 48.47 -79.28 -79.28 274 274 Continent North America Canada Quebec Lac Duparquet>LATITUDE 48.47>LONGITUDE -79.28 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

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Boulder CO 80305-3328 USA online ASCII Archambault, S. and Bergeron, Y. 1992. An 802-year tree-ring chronology from the Quebec boreal forest. Canadian Journal of Forest Research, 22, 674-682.

On the rocky shores and islands of Lake Duparquet, in the southwestern Quebec boreal forest, Thujaoccidentalis L. reaches ages in excess of 800 years. Annual ring widths from 38 trees were used to develop an 802-year chronology (1186–1987) standardized by polynomial regressions. Excellent cross dating, correlation with a shorter chronology located 14?km inland, and 33.6% common variance in a chronology subsample all point to the existence of a climatic signal. After autoregressive modeling to obtain a serially random residual chronology, correlation and response functions were used to identify the growth–climate relationship. The resulting model reduced 19.2% of the chronology variance. Precipitation in June as well as low temperature in June or July seemed to have a positive influence on growth. Likewise, a drought index was closely related to growth, indicating that the chronology could be used to estimate past drought conditions. Moisture deficits are thus inferred for the 13th century as well as during the Little Ice Age (17th century to late 19th century). Since the end of the latter period, precipitation seems to have followed an upward trend.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/namerica2k/nam-tr_33-cana106-1200-1987.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11