Decreasing trend in severe weather occurrence over China during the past 50 years.

Figure 2a shows that the annual-mean number of thunderstorm events has a decreasing trend at an overwhelming majority of the 580 stations across China during 1961–2010, with most stations experiencing a decreasing rate of around 1% per year east of the Tibetan Plateau.

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Meanwhile, there are also more stations that have decreasing trend of 850-hpa moisture that with those with an increasing trend ( Fig. 5b ).

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