S3 Table: Slopes and intercepts for monthly Tmin and Tmax distribution metrics using the modeled
SNOTEL + COOP data, 1948 – 2012. We used the non-parametric Theil-Sen estimator to
calculate the slopes of these descriptive metrics as a function of time (i.e., trend) and the MannKendall test to test if the slopes were significantly different than zero. Only metrics with p <0.11
are shown.
Month
January
Metric
Slope
th
0.042
25
th
0.044
50
0.046
75th
0.043
Mean
Skewness
February
25th
50th
Skewness
Kurtosis
Tmin
Intercept
-16.917
-14.835
-12.973
-14.706
p
0.019
0.008
0.006
0.016
-0.006
-0.008
0.450
0.292
0.003
0.012
Slope
Tmax
Intercept
p
0.046
0.049
0.049
0.048
0.004
-7.074
-5.825
-4.008
-5.378
0.900
0.001
0.000
0.001
0.001
0.105
0.023
0.022
-4.005
-2.479
0.083
0.098
March
25th
50th
75th
Mean
Skewness
0.063
0.063
0.055
0.060
-13.169
-11.991
-9.650
-11.484
0.000
0.000
0.000
0.000
0.062
0.062
0.064
0.063
0.002
-1.654
-0.119
1.755
0.161
0.708
0.000
0.000
0.000
0.000
0.101
April
25th
50th
75th
Mean
0.015
0.018
0.013
0.016
-7.252
-5.983
-4.324
-5.575
0.062
0.039
0.085
0.068
0.026
0.024
0.028
0.025
3.895
5.588
7.658
6.255
0.028
0.053
0.034
0.037
May
Skewness
Kurtosis
Variance
-0.002
-0.010
1.224
1.428
0.085
0.001
0.001
0.506
0.051
0.018
8.787
0.029
0.024
18.637
0.042
0.018
9.771
0.014
0.022
0.021
0.031
0.024
19.308
21.275
23.844
21.781
0.046
0.049
0.007
0.023
-0.003
0.014
-0.369
11.142
0.010
0.009
June
July
75th
Skewness
Kurtosis
Variance
-0.003
-0.016
0.006
1.434
2.042
5.143
0.004
0.000
0.075
25th
50th
75th
Mean
Skewness
Kurtosis
Variance
0.013
0.016
0.019
0.016
-0.003
-0.009
0.014
4.169
5.503
6.972
6.111
1.235
1.244
6.095
0.017
0.014
0.006
0.012
0.024
0.037
0.029
Tmin
Slope
Tmax
p
Intercept
0.011
0.015
0.015
0.015
-0.005
-0.014
3.402
4.909
6.647
5.119
1.185
1.402
0.092
0.048
0.029
0.048
0.001
0.001
Month
August
Metric
25th
50th
75th
Mean
Skewness
Kurtosis
Variance
September
50th
75th
Mean
Skewness
Kurtosis
Variance
0.013
0.016
0.011
-0.005
-0.013
0.954
2.356
1.226
1.087
1.374
0.054
0.036
0.054
0.001
0.000
Kurtosis
-0.010
1.428
0.001
October
Slope
Intercept
p
0.018
0.022
0.031
0.023
-0.001
-0.003
0.009
18.762
20.740
23.198
21.208
0.404
-0.460
11.099
0.056
0.037
0.004
0.025
0.038
0.003
0.103
0.025
18.290
0.096
-0.004
0.023
-0.543
8.925
0.000
0.000
-0.003
-0.456
0.011