20 10 extreme weather in China

The number of high temperature days in summer is the highest since 196 1, and the average maximum temperature is the highest since 196 1. In the summer of 20 10, the national average number of high temperature days was 9.7 days, 3.5 days more than normal, and the highest in the same period since 196 1. The national average extreme maximum temperature is 35.0℃, which is 2.0℃ higher than normal, the highest in the same period since 196 1.

-Extreme precipitation events have been the most since 196 1. The daily precipitation at 97 stations in China exceeded the historical extreme value, and the cumulative precipitation at 133 stations exceeded the historical extreme value. The extreme precipitation events in China are the most since 196 1.

-The typhoon landing rate reached a record high. Although the number of typhoons in the western Pacific is the least since the founding of New China, seven tropical cyclones landed on the coast of South China in the whole year, accounting for 50%, which is the most on record. Typhoon generation time and landing place are concentrated. During the recent 10 days from the end of August to the beginning of September, a total of five tropical cyclones were generated, and five tropical cyclones landed in Fujian coastal areas throughout the year.

Chen Zhenlin said that extreme weather and climate events in China showed an obvious increasing trend. In recent ten years, extreme weather and climate events have occurred frequently in China.

-The frequency, intensity and influence range of extreme high temperature events have obviously increased. The average number of high temperature days in summer in China is 6.2 days, and the average extreme high temperature value is 32.9℃. Since 1990s, the average number of high temperature days in China has obviously increased, and the extreme maximum temperature has obviously increased. From 2000 to 2009, the average number of high temperature days in China was 8.2, and the average extreme high temperature value was 33.7℃. From 197 1 to 2000, there were 182 weather stations with extreme high temperature every year in China, accounting for about 12% of the whole country.

―― The number of rainstorm days continued to be on the high side, and extreme precipitation events increased. The average annual number of station days with rainstorm in China is 1258, and the number of station days with rainstorm in July 2000-2009 is more than normal. Among them, the Huaihe River basin was flooded in 2007, which was second only to 1954 after the founding of New China. In the early summer of 2008, serious floods occurred in the Pearl River basin and the upper reaches of Xiangjiang River.

The frequency of drought is increasing. Especially in Northeast China, North China and Southwest China, the trend of drought aggravation is more obvious. During the period of 1996- 15, the average days of moderate drought in the above areas increased by 37%, 16% and nearly 10% respectively. In the summer of 2006, a severe summer drought occurred in Chongqing; From autumn of 2009 to spring of 20 10, a rare drought occurred in southwest China.

-Landing typhoons and strong typhoons increased significantly. Since the beginning of this century, an average of eight tropical cyclones have landed in China every year, four of which have reached typhoon level or above.