基于SPEI的广东省近50 a干旱时空特征

余兴湛, 蒲义良, 康伯乾

Spatial-temporal characteristics of drought in recent 50 years in Guangdong Province based on SPEI

YU Xingzhan, PU Yiliang, KANG Boqian

表4 1971—2020年广东省年尺度SPEI的ESMD各模态分量的周期及方差贡献率

Tab.4 The period and variance contribution rate of each modal component of ESMD decomposition of annual scale SPEI in Guangdong Province during 1971-2020

模态分量 周期/a 方差贡献率/% IMF1 3.1 47.33 IMF2 7.1 20.04 IMF3 12.5 18.07 IMF4 16.7 4.61 趋势余量R 无 9.95