Temperature-sensitivity of the SOS (upper), the SOSmean during 1982–2008 (middle), and the number of pixels (bottom) in relation to mean annual temperature during 1979–2008.
We used the 30-year mean annual temperature to represent the climatic temperature condition. Both regressions shown are significant (P<0.01). Only pixels with a positive change in Teff and a negative SOS–Teff correlation that is significant at P<0.10 level are included. Here Teff is the mean temperature of the pre-season period that has most negative correlation coefficient (closest to −1) with SOS (see details in section 2.2).