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Table 3

Summary of correlation analysis between runoff and surface climate variables. The number of basins that exhibited a significant correlation between runoff and each measure of climate is given, as is the percent out of 25 watersheds. Ravg values indicate average Pearson R of correlations that were significant at the 5% significance level

MaxTMeanTMinTPrecipMaxTMeanTMinTPrecip
Annual runoff Same year climate Preceding year climate 
# of basins (%) 5 (20) 4 (16) 5 (20) 20 (80) 2 (8) 2 (8) 2 (8) 6 (24) 
Ravg − 0.39* − 0.39* 0** 0.62 − 0.36 − 0.36 − 0.35 0.60 
Warm-season runoff Warm-season climate Preceding cold-season climate 
# of basins (%) 8 (32) 3 (12) 1 (4) 16 (64) 6 (24) 6 (24) 6 (24) 15 (60) 
Ravg − 0.44 − 0.47 − 0.49 0.60 − 0.46* − 0.48* − 0.48* 0.49 
Cold-season runoff Cold-season climate Preceding warm-season climate 
# of basins (%) 7 (28) 7 (28) 8 (32) 6 (24) 0 (0) 0 (0) 0 (0) 11 (44) 
Ravg 0.47* 0.49* 0.46* 0.26**    0** 
MaxTMeanTMinTPrecipMaxTMeanTMinTPrecip
Annual runoff Same year climate Preceding year climate 
# of basins (%) 5 (20) 4 (16) 5 (20) 20 (80) 2 (8) 2 (8) 2 (8) 6 (24) 
Ravg − 0.39* − 0.39* 0** 0.62 − 0.36 − 0.36 − 0.35 0.60 
Warm-season runoff Warm-season climate Preceding cold-season climate 
# of basins (%) 8 (32) 3 (12) 1 (4) 16 (64) 6 (24) 6 (24) 6 (24) 15 (60) 
Ravg − 0.44 − 0.47 − 0.49 0.60 − 0.46* − 0.48* − 0.48* 0.49 
Cold-season runoff Cold-season climate Preceding warm-season climate 
# of basins (%) 7 (28) 7 (28) 8 (32) 6 (24) 0 (0) 0 (0) 0 (0) 11 (44) 
Ravg 0.47* 0.49* 0.46* 0.26**    0** 

* R value for one basin was opposite in sign from all other basins exhibiting significant correlation and hence was excluded from Ravg calculation.

** Sign of R value was inconsistent among stations.

MaxT = maximum temperature, MeanT = minimum temperature, MinT = minimum temperature, Precip = precipitation.

Bold values indicate relationships in which more than half of the basins exhibit a significant correlation.

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