A study of the early warning signals of abrupt change in the Pacific decadal oscillation
Wu Hao†
a),
b)
, Hou Wei
b)
, Yan Peng-Cheng
b),
c)
, Zhang Zhi-Sen
b),
c)
, Wang Kuo
d)
Relation among the SST, increased autocorrelation, and increased variance of PDO index.