TABLE 1.
Univariate regression models to predict seasonal synchronya
Model | Parameter | Parameter estimate | Pr > |t| | Pr > F | AIC value |
---|---|---|---|---|---|
Latitude | Intercept | −32.21 | 0.002 | <0.001 | 179 |
Slope | 0.96 | <0.001 | |||
Monthly mean Tmax | Intercept | 22.36 | <0.001 | <0.001 | 179.4 |
Slope | −0.92 | <0.001 | |||
Tmaxannual cycle amplitude | Intercept | −15.78 | <0.001 | <0.001 | 168.23 |
Slope | 1.7 | <0.001 | |||
Tmax annual cycle phase | Intercept | 248.47 | <0.001 | <0.001 | 178.67 |
Slope | −1.11 | <0.001 | |||
Tmax biannual cycle amplitude | Intercept | 3.14 | 0.043 | <0.001 | 176.37 |
Slope | 6.31 | <0.001 | |||
Tmax biannual cycle phase | Intercept | 11.68 | 0.574 | 0.9 | 193.77 |
Slope | −0.01 | 0.903 | |||
Monthly mean Tmin | Intercept | 11.79 | <0.001 | <0.001 | 178.44 |
Slope | −0.87 | <0.001 | |||
Tmin annual cycle magnitude | Intercept | −12.06 | 0.011 | <0.001 | 174.43 |
Slope | 1.59 | <0.001 | |||
Tmin annual cycle phase | Intercept | 207.07 | <0.001 | <0.001 | 183.66 |
Slope | −0.9 | 0.001 | |||
Tmin biannual cycle amplitude | Intercept | 5.72 | <0.001 | <0.001 | 182.13 |
Slope | 4.77 | 0.001 | |||
Tmin biannual cycle phase | Intercept | 22.76 | <0.001 | <0.001 | 186.82 |
Slope | −0.06 | <0.001 | |||
Monthly mean VPD | Intercept | 22.19 | <0.001 | 0.005 | 187.78 |
Slope | −0.02 | 0.005 | |||
VPD annual cycle magnitude | Intercept | −9.52 | 0.08 | 0.002 | 187.49 |
Slope | 0.04 | 0.002 | |||
VPD annual cycle phase | Intercept | 219.12 | 0.001 | 0.002 | 185.17 |
Slope | −0.98 | 0.002 | |||
VPD biannual cycle amplitude | Intercept | 3.08 | 0.304 | 0.04 | 188.3 |
Slope | 0.13 | 0.04 | |||
VPD biannual cycle phase | Intercept | 14.22 | 0.005 | 0.29 | 192.2 |
Slope | −0.06 | 0.29 |
Results for the model with the lowest AIC are shown in boldface. Pr > F, P value associated with the F score for the model; Pr > |t|, 2-tailed P value for testing the null hypothesis that the parameter estimate is 0; Tmax, maximum daily temperature; Tmin, minimum daily temperature; VPD, vapor pressure deficit.