黄河上游主要汇流区夏季复合干热事件变化特征及其对径流的影响

杨博成, 李维国, 刘晓云, 董胜虎, 贵强, 甘泽良, 郑琼

Characteristics of summer compound dry hot events in the main confluence area of the upper Yellow River and their impact on runoff

YANG Bocheng, LI Weiguo, LIU Xiaoyun, DONG Shenghu, GUI Qiang, GAN Zeliang, ZHENG Qiong

表3 基于EEMD分解的1961—2022年黄河上游主要汇流区夏季复合干热指数不同时间尺度分量贡献率

Tab.3 Contribution rates of different time scale components of sumer compound dry-hot index based on EEMD decomposition in the main confluence area of the upper Yellow River from 1961 to 2022

分量 贡献率C/% 周期T/a 与原序列相关系数 IMF1 53.17 3.3 0.59*** IMF2 11.71 8.2 0.568*** IMF3 7.47 17.7 0.340** IMF4 1.22 20.7 0.212 趋势项 26.43 0.395**