Wilson - Cornwall Hills - PCEN - ITRDB CANA238 Wilson, R.J.S.; Luckman, B.H. Wilson, R.J.S. Luckman, B.H. 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: C9808W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9830W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9817S; 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: C9825N; 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: C9807W; 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: C9813NE; 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: C9818W; 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: Cb9805SW; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9808W; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9813N; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9825N; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (earlywood 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: C9817S; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9818E; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9827W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9831SE; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9811W; 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: C9814E; 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: C9822NW; 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: C9831SE; 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: C9831WI; 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: C9804SE; 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: C9811N; 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: Cb9804NE; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9804SE; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9818E; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9822NE; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9829S; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9832W; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9804SE2; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9813N; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9822NE; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9830S; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9831W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9829S; 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: C9821N; 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: C9831W; 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: Cb9811W; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9814N; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9825S; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9831SE; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9832W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9805SW; 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: C9825S; 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: C9827W; 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: C9831WO; 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: C9816S; 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: Cb9822NW; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9804NE; 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: C9811W; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9814N; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9822NW; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9825S; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9827N; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9805N; 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: C9808W; 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: C9818E; 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: C9827N; 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: C9828; 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: C9832E; 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: Cb9814E; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9831W; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9804NE; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9805N; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9813N; 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: C9830W; 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: C9832W; 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: Cb9817E; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9827W; units are 0.1 reflectance intensity) 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 (latewood 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: C9805SW; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9817E; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9825N; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9817E; 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: C9807N; 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: Cb9817S; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (blue intensity,null,null,null,null,tree ring,null,null,N,units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9814E; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9829S; ) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: C9804SE2; 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: C9814N; 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: C9822NE; 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: C9830S; 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: C9821NE; 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: Cb9805N; units are 0.1 reflectance intensity) earth science/paleoclimate/tree ring (total ring width,null,null,millimeter,null,tree ring,null,null,N,Tree ID: Cb9830S; units are 0.1 reflectance intensity) earth science/paleoclimate/tree-ring earth science/paleoclimate/tree-ring (Cornwall Hills>LATITUDE 50.7>LONGITUDE -121.45) Maximum latewood density (MXD) is a strong proxy of summer temperatures. Despite this, there is a paucity of long MXD chronologies in the Northern Hemisphere, which limits large-scale tree-ring-based reconstructions of past temperature which are dominated by ring-width (RW) data - a weaker temperature proxy at inter-annual time-scales. This paucity likely results from the relative expense of measuring MXD and the lack of laboratories with the facilities to measure it. Herein, we test the ability of a relatively new, less expensive, tree-ring parameter, Blue Intensity (BI), to act as a surrogate parameter for MXD. BI was measured on Engelmann spruce samples from British Columbia where MXD had previously been measured to allow direct comparison between the two parameters. Signal strength analyses indicate that 8 MXD series were needed to acquire a robust mean chronology while BI needed 14. Utilising different detrending methods and parameter choices (RW + MXD vs RW + BI), a suite of reconstruction variants was developed. The explained variance from the regression modelling (1901-1995) of May-August maximum temperatures ranged from 52% to 55%. Validation tests over the earlier 1870-1900 period could not statistically distinguish between the different variants, although spectral analysis identified more lower frequency information extant in the MXD-based reconstructions - although this result was sensitive to the detrending method used. Ultimately, despite the MXD-based reconstruction explaining slightly more of the climatic variance, statistically robust reconstructions of past summer temperatures were also derived using BI. These results suggest that there is great potential in utilising BI for dendroclimatology in place of MXD data. However, more experimentation is needed to understand (1) how well BI can capture centennial and lower frequency information and (2) what biases may result from wood discolouration, either from species showing a distinct heartwood/sapwood boundary or from partly decayed sub-fossil samples. STUDY NOTES: NOAA Template Raw Measurements file added 2019-02-04. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wilson, R.J.S. Investigator : Luckman, B.H. 2007-08-03 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5512 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana238.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana238.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x.rwl English https://www.ncdc.noaa.gov/paleo/study/5512 https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238b.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238e-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/cana238.txt https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238l-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238-noaa.rwl https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/canada/cana238x.rwl Rob Wilson, Rohit Rao, Miloš Rydval, Cheryl Wood, Lars-Åke Larsson, and Brian H. Luckman 2014Blue Intensity for dendroclimatology: The BC blues: A case study from British Columbia, Canada The Holocene24111428-143810.1177/0959683614544051http://hol.sagepub.com/content/24/11/1428.abstract START YEAR: 1554 AD * END YEAR: 1997 AD -121.45 50.7 -121.45 50.7