Extended Data Figure 10: Changes in apparent temperature sensitivity of leaf unfolding between years with more or less chilling.
From: Declining global warming effects on the phenology of spring leaf unfolding
a, b, ST for years with less chilling (a) and more chilling (b) with a 20-year moving window for 1980–2013. For each 20-year series, we divided the 20 years into two groups based on the mean chilling accumulation (chilling was accumulated when daily temperature within the temperature range between 0 °C and 5 °C from 1 November to the day of leaf unfolding). The 10 years with chilling higher than the overall mean were defined as more chilling, and the other 10 years were defined as less chilling. The black lines indicate the average across all species, and the grey area indicates one s.d. either side of the mean. The dotted lines are the linear regressions. c, Chilling accumulation for years with less chilling (red line) and more chilling (blue line) with a 20-year moving window for 1980–2013. d, The mean radiation sum over the preseason for years with less chilling (red line) and more chilling (blue line) with a 20-year moving window for 1980–2013. The preseason was determined over the period 1980–2013.
