Why the Increasing Trend of Summer Rainfall over North China Has Halted since the Mid-1990s

Figure 2

(a) The time series of ISPNC₁₇ during 1979–2016. The horizontal dashed lines indicate the interdecadal mean, while solid line from 1979 to 1996 indicates the interdecadal trend, and the vertical dashed lines indicate the interdecadal shift points. (b) The Mann-Kendall test of ISPNC₁₇ (green dotted line shows backward statistic rank series, and blue dotted line shows forward statistic rank series). Two black lines show 95% confidence level.

(a)

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