Bighorn Mountains Dendrochronology

 

Climate response of Bighorn Basin ring-width chronologies

These results are preliminary and unpublished. Please do not cite or distribute.

Values in the three tables below are Pearson correlation coefficients indicating the association between annual ring-width indices from each of three chronologies and a monthly climate value for each year (starting 1895-1907 and ending 1994-1997). Significant correlations are in red. A few other significant values are not shown.


Wyoming Division 4 indices and averages
Correlations with standard chronologies from:
    Trapper Inferno Tensleep
Palmer Hydrological Drought Index
  May 0.45 0.47 -0.11
  June 0.56 0.52 0.00
  July 0.52 0.47 0.00
  August 0.46 0.45 0.00
Palmer Drought Severity Index
  May 0.34 0.41 -0.13
  June 0.55 0.51 0.01
  July 0.51 0.44 -0.01
  August 0.43 0.42 -0.05
Precipitation
  January 0.26 0.24 0.00
  May 0.28 0.27 0.09
  June 0.32 0.25 0.30
  July 0.03 0.00 0.09
  August 0.02 0.14 0.01
  December 0.29 0.26 0.08
Temperature
  May -0.42 -0.24 -0.06
  June -0.33 -0.26 -0.25
  July -0.31 -0.06 -0.07
  August -0.06 -0.10 0.08
  December -0.27 -0.16 -0.18


Met. station precipitation
Correlations with standard chronologies at:
    Trapper Inferno Tensleep
Worland, WY
  January 0.26 0.35 0.10
  February 0.24 0.02 0.00
  May 0.19 0.18 0.36
  June 0.33 0.12 0.43
  November 0.15 -0.04 0.26
  December 0.25 0.22 0.13
Lovell, WY
  January 0.21 0.23 0.09
  May 0.21 0.26 0.11
  June 0.21 0.14 0.34
Buffalo Bill Dam, WY
  May 0.25 0.24 0.29
  June 0.20 0.17 0.33
  December 0.04 0.23 -0.04
Bridger, MT
  January 0.13 0.29 0.26
  May 0.19 0.26 0.12
  June 0.18 0.16 0.24
  November 0.14 0.26 0.30
  December 0.27 0.32 0.19
Five station average (with Powell, WY)
  January 0.25 0.33 0.20
  May 0.26 0.29 0.26
  June 0.27 0.18 0.38
  November 0.20 0.16 0.26
  December 0.21 0.32 0.10


Met. station temperature
Correlations with standard chronologies at:
    Trapper Inferno Tensleep
Worland, WY
  May -0.44 -0.28 -0.14
  June -0.27 -0.20 -0.30
  December -0.25 -0.20 -0.13
Powell, WY
  January -0.25 -0.10 -0.01
  April -0.12 -0.06 0.26
  May -0.45 -0.23 -0.08
  June -0.31 -0.19 -0.30
  July -0.23 -0.01 -0.17
  December -0.23 -0.12 -0.04
Buffalo Bill Dam, WY
  April -0.06 -0.11 0.26
  May -0.44 -0.31 -0.19
  June -0.33 -0.26 -0.44
  July -0.24 -0.05 -0.32
  December -0.26 -0.21 -0.06
Three-station average
  April -0.08 -0.09 0.25
  May -0.46 -0.29 -0.14
  June -0.33 -0.23 -0.38
  July -0.26 -0.02 -0.25
  December -0.26 -0.18 -0.08

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