Abstract:The metabolic and phenological response of vegetation to the change in temperature was studied by using the latitudinal gradient to represent the temperature gradient.By comparing the seasonal NDVI curves of different latitudinal zones,we found that the peak value (M NDVI ) increased as latitudes decreased from 75~56°N,with the greatest peak occurring at 56°N.In the same latitude range,the peaking time as measured by the Julian days when the M NDVI was reached decreased with latitude.Th...