Luckman - Peyto Glacier snags - PCEN - ITRDB CANA445 Luckman, B.H.; Reynolds, J.; St. George, S. Luckman, B.H. Reynolds, J. St. George, S. PCEN Picea engelmannii Parry ex Engelm. Engelmann spruce earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91432X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91441R; 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: P43C; 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 (maximum density,null,null,gram per decimeter,null,tree ring,null,null,N,null) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91441X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91431R; 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: P01A; 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: P43B; 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: Y91011X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91012R; 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: Y91442R; 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: P43B2; 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: P44B; 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: Y91012X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91011R; 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: P01B; 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: P44A; 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: Y91431X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91442X; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Y91432R; 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: P43A; 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: P43D; 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 earth science/paleoclimate/tree-ring (Peyto Glacier>LATITUDE 51.7>LONGITUDE -116.5167) We present a significant update to a millennial summer temperature reconstruction (1073-1983) that was originally published in 1997. Utilising new tree-ring data (predominantly Picea engelmannii), the reconstruction is not only better replicated, but has been extended (950-1994) and is now more regionally representative. Calibration and verification statistics were improved, with the new model explaining 53% of May-August maximum temperature variation compared to the original (39% of April-August mean temperatures). The maximum latewood density data, which are weighted more strongly in the regression model than ringwidth, were processed using regional curve standardisation to capture potential centennial to millennial scale variability. The reconstruction shows warm intervals, comparable to twentieth century values, for the first half of the eleventh century, the late 1300s and early 1400s. The bulk of the record, however, is below the 1901-1980 normals, with prolonged cool periods from 1200 to 1350 and from 1450 to the late 19th century. The most extreme cool period is observed to be in the 1690s. These reconstructed cool periods compare well with known regional records of glacier advances between 1150 and the 1300s, possibly in the early 1500s, early 1700s and 1800s. Evidence is also presented of the influence of solar activity and volcanic events on summer temperature in the Canadian Rockies over the last 1,000 years. Although this reconstruction is regional in scope, it compares well at multi-decadal to centennial scales with Northern Hemisphere temperature proxies and at millennial scales with reconstructions that were also processed to capture longer timescale variability. This coherence suggests that this series is globally important for the assessment of natural temperature variability over the last 1,000 years. STUDY NOTES: Cores are stored at: # # # # University of Western Ontario # # # # # # # # References: # # # # Reynolds, J. 1992. # # # # Dendrochronology and glacier fluctuations at Peyto Glacier, Banff National Park. # # # # Unpublished B.Sc. thesis, Department of Geography, University of Western Ontario NOAA Template Raw Measurements file added 2019-01-27. NOAA Template Raw Measurements file added 2019-02-04. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Luckman, B.H. Investigator : Reynolds, J. Investigator : St. George, S. 2014-05-08 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16604 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana445.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana445.txt English https://www.ncdc.noaa.gov/paleo/study/16604 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana445.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana445.txt B.H. Luckman, R.J.S. Wilson 2005Summer temperatures in the Canadian Rockies during the last millennium: a revised recordClimate Dynamics242-3131-14410.1007/s00382-004-0511-0http://link.springer.com/article/10.1007%2Fs00382-004-0511-0 START YEAR: 760 AD * END YEAR: 1326 AD -116.5167 51.7 -116.5167 51.7