Fig. 5
Correlograms for the relationship between the mean temperature on a mobile window of 3, 4, or 5 weeks and the different leaf phenology and productivity dynamics indicators (annotated on the top of the graph). Each pixel (x, y) on each plot corresponds to a temperature averaging window spanning y weeks (vertical axis) after the date x (horizontal axis). The color of a pixel (x, y) corresponds to the correlation coefficient between the indicator considered in a given graph and the mean temperature on the corresponding temperature averaging window (starting at the date x and spanning y weeks after). Significant (p value < 0.05) and highly significant (p value < 0.01) correlation coefficients are indicated by a cross and a target, respectively. A red square corresponds to a significant positive correlation and a blue square to a significant negative correlation. The vertical dotted line indicates the mean value of the considered phenological(s) indicator(s)