Relationship between SOS/EOS and the response of climate variables in SRYY from 2002 to 2021.Spatial pattern of significance between SOS/EOS and monthly average temperature (a and b), precipitation (c and d). Spatial distribution of dominant climate factors affecting phenology; SOS and tem + pre (e), EOS and tem + pre (f), insign represents no significant change. April is on the left and August is on the right.