Research Article
Spatial Variability and Periodicity of Precipitation in the Middle Reaches of the Yellow River, China
Table 4
The mean periods of various time-scale components for
during 1958–2013 in the MRYR obtained by the EEMD.
| Station (abbreviation) | IMF1 | IMF2 | IMF3 | IMF4 |
| Regional precipitation (MRYR) | 2.8 | 5.6 | 9.3 | 18.8 | Youyu (YY) | 2.4 | 4.3 | 9.3 | 35.1 | Hequ (HQ) | 2.8 | 6.2 | 14.0 | 29.4 | Wuzhai (WZ) | 2.8 | 5.6 | 11.2 | 27.6 | Xingxian (XX) | 2.5 | 5.1 | 11.2 | 18.5 | Yulin (YL) | 2.8 | 5.6 | 11.2 | 32.9 | Taiyuan (TY) | 2.8 | 5.1 | 9.3 | 18.6 | Hengshan (HS) | 3.3 | 6.2 | 14.0 | 42.5 | Suide (SD) | 2.8 | 6.2 | 18.7 | 24.9 | Lishi (LS) | 2.8 | 5.1 | 11.2 | 39.6 | Jiexiu (JX) | 2.7 | 5.6 | 9.3 | 27.8 | Wuqi (WQ) | 2.5 | 4.7 | 9.3 | 19.2 | Yan’an (YA) | 2.8 | 5.1 | 14.0 | 27.9 | Xixian (XX) | 2.7 | 5.1 | 14.0 | 47.6 | Linfen (LF) | 2.7 | 5.6 | 9.3 | 18.6 | Huanxian (HX) | 2.5 | 7.0 | 14.0 | 29.9 | Luochuan (LC) | 2.7 | 5.6 | 11.2 | 27.1 | Yuncheng (YC) | 3.1 | 6.2 | 11.2 | 50.1 | Xiji (XJ) | 2.8 | 6.2 | 11.2 | 19.7 | Pingliang (PL) | 2.8 | 5.6 | 14.0 | 30.5 | Xifeng (XF) | 2.8 | 6.2 | 9.3 | 47.8 | Changwu (CW) | 2.5 | 5.1 | 8.0 | 24.2 | Tongchuan (TC) | 3.1 | 6.2 | 11.2 | 28.6 | Tianshui (TS) | 2.3 | 4.3 | 9.3 | 25.8 | Baoji (BJ) | 2.7 | 5.1 | 11.2 | 26.3 | Wugong (WG) | 2.5 | 5.1 | 9.3 | 26.3 | Xi’an (XA) | 2.7 | 5.6 | 9.3 | 25.3 |
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Note: and represent significant trend tested at 0.1 and 0.05 significant levels, respectively.
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