黄河流域降水格局及影响因素

王俊杰, 拾兵, 柏涛, 袁青云

Spatio-temporal patterns of precipitation and its possible driving factors in the Yellow River Basin

Junjie Wang, Bing Shi, Tao Bai, Qingyun Yuan

表1 黄河流域平均月降水量集合经验模态分解（EEMD）各 IMF 分量主周期与方差贡献率

Table 1 The primary periods and variance contribution rates of each IMF decomposed by EEMD of mean monthly precipitation

项目 IMF分量 IMF1 IMF2 IMF3 IMF4 IMF5 IMF6 IMF7 IMF8 IMF9 Res 主周期/a 0.25 0.5 0.75 1.0 2.1 3.3 6.7 17.9 23.8 — 贡献率/% 19.80 7.97 7.85 45.18 8.16 3.23 2.66 2.57 2.00 0.58 累积贡献率/% 19.80 27.77 35.62 80.80 88.96 92.19 94.85 97.42 99.42 100