南海南部珊瑚骨骼δ18O和Sr/Ca对ENSO的分级响应
李若安1(), 李旭清2, 陈天然2()
Graded responses of coral skeletal δ18O and Sr/Ca to ENSO in the southern South China Sea
LI Ruoan1(), LI Xuqing2, CHEN Tianran2()

图4. 根据±1<i>σ</i>和±2<i>σ</i>标准差作为阈值, 将El Niño和La Niña事件划分为中等、强烈和极端3个等级

a. Niño3.4的时间序列; b. 经12~48Hz带通滤波处理后的南海南部SSTA的时间序列

Fig. 4. Classification of El Niño and La Niña events into moderate, intense, and extreme categories, using ±1<i>σ</i> and ±2<i>σ</i> standard deviations as thresholds. (a) Time series of Niño3.4; (b) time series of SSTA in the southern SCS after 12~48 Hz band-pass filtering