Spatial Variability and Periodicity of Precipitation in the Middle Reaches of the Yellow River, China

Table 3

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)	2.5	4.3	9.3	27.9
Youyu (YY)	2.3	5.6	11.2	21.2
Hequ (HQ)	2.7	5.6	11.2	27.9
Wuzhai (WZ)	2.8	5.6	11.2	19.2
Xingxian (XX)	2.5	5.6	11.2	24.2
Yulin (YL)	2.9	5.6	11.2	29.0
Taiyuan (TY)	2.7	5.1	9.3	21.4
Hengshan (HS)	2.8	4.7	8.0	27.3
Suide (SD)	2.5	5.6	9.3	28.1
Lishi (LS)	2.5	5.6	11.2	46.1
Jiexiu (JX)	2.5	4.3	9.3	27.8
Wuqi (WQ)	2.5	5.6	9.3	18.6
Yan’an (YA)	2.4	5.6	9.3	27.7
Xixian (XX)	2.3	4.7	9.3	29.0
Linfen (LF)	2.7	5.6	9.3	22.7
Huanxian (HX)	2.4	5.6	11.2	28.3
Luochuan (LC)	2.7	4.7	9.3	26.5
Yuncheng (YC)	2.8	5.1	11.2	30.3
Xiji (XJ)	2.9	6.2	14.0	27.9
Pingliang (PL)	2.3	4.7	9.3	18.7
Xifeng (XF)	2.8	6.2	11.2	48.1
Changwu (CW)	2.8	5.1	9.3	23.4
Tongchuan (TC)	3.1	5.6	11.2	27.0
Tianshui (TS)	2.7	4.7	11.2	28.3
Baoji (BJ)	2.7	5.1	9.3	29.5
Wugong (WG)	2.8	4.7	8.0	23.5
Xi’an (XA)	2.9	5.6	9.3	26.9

Note: and represent significant trend tested at 0.1 and 0.05 significant levels, respectively.