Beier - Cedar Lake Juneau - CHNO - ITRDB AK156 Beier, C.M.; Sink, S.E. Beier, C.M. Sink, S.E. CHNO Chamaecyparis nootkatensis (D. Don) Spach Alaska yellow-cedar Nootka cypress earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt14a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt06a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt11a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt15a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt07a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt01a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt13a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt10a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt05a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt08a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt04a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (age,null,null,year Common Era,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt12a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt03a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: clt02a; units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999) earth science/paleoclimate/tree-ring (Cedar Lake Juneau>LATITUDE 58.6661>LONGITUDE -134.9681) Decline of yellow-cedar (Chamaecyparis nootkatensis ((D. Don) Spach) has occurred on 200 000 ha of temperate rainforests across southeastern Alaska. Because declining forests appeared soon after the Little Ice Age and are limited mostly to low elevations (whereas higher elevation forests remain healthy), recent studies have hypothesized a climatic mechanism involving early dehardening, reduced snowpack, and freezing injury. This hypothesis assumes that a specific suite of microclimatic conditions occurs during late winter and declining cedar populations across the region have responded similarly to these conditions. Based on the first geographically extensive tree ring chronologies constructed for southeastern Alaska, we tested these assumptions by investigating regional climatic trends and the growth responses of declining cedar populations to this climatic variation. Warming winter trends were observed for southeastern Alaska, resulting in potentially injurious conditions for yellow-cedar due to reduced snowfall and frequent occurrence of severe thaw-freeze events. Declining cedar forests shared a common regional chronology for which late-winter weather was the best predictor of annual growth of surviving trees. Overall, our findings verify the influence of elevational gradients of temperature and snow cover on exposure to climatic stressors, support the climatic hypothesis across large spatial and temporal scales, and suggest cedar decline may expand with continued warming. STUDY NOTES: NOAA Template Raw Measurements file added 2019-02-08. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Beier, C.M. Investigator : Sink, S.E. 2017-11-08 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23052 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/ak156.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/ak156.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156.rwl English https://www.ncdc.noaa.gov/paleo/study/23052 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/ak156.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/ak156.rwl Colin M. Beier, Scott E. Sink, Paul E. Hennon, David V. D’Amore, Glenn P. Juday2008Twentieth-century warming and the dendroclimatology of declining yellow-cedar forests in southeastern AlaskaCanadian Journal of Forest Research3861319-133410.1139/X07-240http://www.nrcresearchpress.com/doi/abs/10.1139/X07-240#.Wgo1dGc9akw START YEAR: 1700 AD * END YEAR: 2004 AD -134.9681 58.6661 -134.9681 58.6661