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

<div>The difference by 1997–2016 mean minus 1979–1996 mean for (a) 850 hPa horizontal winds (units: m/s) and (b) vertical integral of water vapor flux (unit: kg/m/s). Shaded areas are statistically significant at the 95% confidence level according to Student’s <i>t</i>-test. The red box shows North China. The green box shows the region of Lake Baikal (40°N–60°N, 80°E–120°E). The white region outlines surface pressure lower than 850 hPa.</div>

Advances in Meteorology

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Figure 5

Figure 5: Why the Increasing Trend of Summer Rainfall over North China Has Halted since the Mid-1990s 