What disasters will the prevalence of Siberian cold current cause?

Cold wave is a large-scale weather process, which will cause a wide range of severe cooling, strong winds and snowfall along the way. Disasters caused by cold wave, such as gale, frost, snowstorm, etc., have great influence on agriculture, transportation, electricity, navigation and people's health.

Cold wave gale is windy weather caused by cold wave weather. Cold wave and strong wind involve a wide range. Inner Mongolia, Gansu, Ningxia, northwestern Shaanxi, northwestern Shanxi, Hebei, northern Henan, Heilongjiang, Jilin and Liaoning in northern China are all areas with frequent cold waves and strong winds. Cold waves and strong winds may also occur from the south of Huaihe River in China to the middle of South China Sea. Cold waves and strong winds are mainly northerly winds, and the wind force is generally 5-6. When the cold air is strong or the ground low pressure develops strongly, the wind force can reach 7.

China's cold wave and strong wind are widely distributed, which can spread to the whole country. The distribution of annual gale frequency (days) has regional characteristics. The average number of windy days in most areas is about 20 ~ 70 days, the northwest, north China, northeast China and Qinghai-Tibet Plateau are between 10 ~ 75 days, and the southwest, south China and Yangtze River basin are between 3 ~ 25 days. There are three high-frequency areas of windy days in China: the first is the Qinghai-Tibet Plateau. The annual gale days reach 75 ~ 100 days and above, which is the largest gale-prone area in China, often causing gale disasters in snowy plateau and affecting animal husbandry production. Second, northern Inner Mongolia and northwestern Xinjiang are the only roads for cold wave invasion, especially in northern Inner Mongolia, where the terrain is flat, cold waves and strong winds are unimpeded, and the number of windy days is as high as 50-80 days, which leads to serious sandstorms and wind erosion and desertification in this area. It has a great influence on agriculture and animal husbandry production. The third high-frequency windy area is Songliao Plain in Northeast China, and the number of windy days is about 25 ~ 50 days. This area is an area where the development of northeast cyclones is strengthened. There are Daxing 'anling and Inner Mongolia Plateau in the west and Xiaoxing 'anling and Changbai Mountain in the east. The narrow tube effect of large terrain enhances the wind force. There are frequent cold waves and strong winds in this area in spring, which often causes spring drought and affects spring sowing production. The distribution of days in cold wave and gale season in China has obvious seasonal differences. Most of them are.

The disasters caused by cold wave and strong wind mainly depend on the wind and its duration. As far as the whole country is concerned, the maximum instantaneous wind speed, in addition to mountains and strong terrain, is only the cold wave and gale s- 1 over 40m in northern Inner Mongolia. According to the statistics of gale process for many years, the gale time is longer in the inland coastal areas of China, longer in the north, and the northerly wind lasts longer than the southerly wind. Cold wave and strong wind have great influence on agricultural production and fishery production.

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