Experts interpret whether the rainy season in North China has opened in advance

Xinhua News Agency, Beijing, July 8th: Experts interpret whether the rainy season in North China has opened in advance

Xinhua News Agency reporter Huang Yan

Recently, the rainfall in Beijing, Tianjin -Hebei, the central and eastern parts of Inner Mongolia, Shandong, Liaoning, and Jilin are significantly too much. Is it the original "seven or eight" (July 18th to August 18th) in North China?

Zhang Bo, a senior engineer of the Central Meteorological Observatory, said that since late June, the rainfall in the north is obviously closely related to the Western Pacific subtropical high -pressure position. This year, the Western Pacific Deputy Gaobei jumped early and the location was north, causing the rain belt to directly move north to the Huanghuai area of ​​North China.

From June 21st to July 5th, the location of the Western Pacific Vice Heights continued to north. Taking June 22 as an example, the position of the ridge line of the Western Pacific Deputy Gaoxi section is around 22 degrees north latitude, and this year has been lifted to 24 degrees north latitude; the average position of previous years around July 1 is 24 degrees north latitude to 25 degrees from 25 degrees to 25 degrees. Between this year, it reached 34 degrees north latitude. According to the forecast, until mid -July, the position of the Western Pacific Vice Height was north of the past.

According to the weather forecast of the Central Meteorological Taichung period, the next 10 days (July 8th to 17th), North China, Northeast, and Huanghuai will still rain. Does this mean that the rainy season of "seven or eight" has arrived in advance?

"Whether the rainy season in North China starts with industry standards, mainly considering the location of the Western Pacific Vice Relax, the cumulative precipitation of the region and the secondary ratio of the standard stations." Yuan Yuan, a researcher at the climate forecast room of the National Climate Center. The critical state of the beginning, but has not yet reached the starting criteria, and is currently considered to be earlier than usual (July 18).

According to statistics from the National Climate Center, from 2000 to 2021, there were 6 years of the rainy season of Huibei began to be significantly early. Unlike Jianghuai Meimei, the main characteristics of rainfall in the rainy season in North China are the strong precipitation intensity, strong locality, and uneven distribution.

The summer climate trend prediction of the National Climate Center shows that from July to August, the precipitation of precipitation in eastern and southern Jilin, Liaoning, Beijing, Tianjin, Hebei, central Shanxi, southern, Shandong, and Henan 50 %.

Yuan Yuan said that the Yellow River Basin, Haihe River Basin, and the Liaohe Basin in the summer of the summer need to prevent staged heavy precipitation and heavy rain and flood disasters; in the short -term precipitation, thunderstorms, local tornado, hail, etc. in the Northeast, North China and other places. Corresponding measures need to be taken to reduce the impact of industrial and agricultural production, infrastructure and personal safety, and do a good job of preventing the floods of small and medium -sized rivers and urban waterlogging.

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