山东春季极端低温与前冬北大西洋海温的关系
徐玮平, 孟祥新, 顾伟宗, 伯忠凯

Relationship between extremely low temperature in spring in Shandong Province and North Atlantic SST in preceding winter
XU Weiping, MENG Xiangxin, GU Weizong, BO Zhongkai
图3 1961—2018年春季山东区域平均冷夜(a)和极端低温事件(b)发生频率的标准化距平及其9 a滑动平均
Fig.3 The standardized anomaly of cold night (a) and extremely low temperature events (b) regional average occurrence frequency in spring in Shandong from 1961 to 2018 and their 9-year moving average