Fig 3 -

a) Correlations calculated between the tree-ring δ18O chronology and climate variables recorded by Shanghang meteorological station from previous November to current October during the period of 1960–2014. M-A symbolizes the combined months from May to August. Stars indicate the 95% confidence level; b) Relationship between the δ18O chronology and the observed EASM index for the period of 1948–2014.