Supplementary dataset for the research article "Abrupt increase in ENSO variability at 700 CE triggered by solar activity"

The dataset includes coral Sr/Ca ratio from the Xisha Islands during 665-749 CE for the research article "<strong>Abrupt increase in ENSO variability at 700 CE triggered by solar activity</strong>" by Jiang et al.本数据集包含公元665年至749年西沙群岛（Xisha Islands）的珊瑚锶钙比（Sr/Ca ratio）数据，用于蒋等人（Jiang et al.）发表的研究论文《公元700年太阳活动触发的厄尔尼诺-南方涛动（ENSO）变率突变增强》。