Why is it dry when the north wind blows and wet when the south wind blows?

1. Answer: Because the north wind generally originates from the Asian high in western Siberia, it blows to west Asia, middle Asia and east Asia (including most of it). The north wind drives the cold air south, so it is very dry. The south wind, on the other hand, is a humid air flow originating from the Atlantic Ocean and the Pacific Ocean, which blows to India and China, bringing very warm and humid air, which is easy to form rainfall and bring humidity.

Second, expand the scope of knowledge:

1. Reason: Due to the geographical location of China.

2. Climate characteristics of China: The climate characteristics of China are high temperature and rainy in summer, cold and rainy in winter, and the high temperature period is consistent with the rainy period. Because China is located in the east of Eurasia, the largest continent in the world, on the west coast of the Pacific Ocean, and near the Indian Ocean in the southwest, the climate is greatly influenced by the mainland and the ocean. In winter, the north wind blows from the mainland to the ocean, and in summer, the south wind blows from the ocean to the land.

Leng Xia is hot in winter, dry in winter and rainy in summer. This climatic feature of the same season of rain and heat is very beneficial to agricultural production. Winter crops have been harvested or stopped growing, and generally do not need much water. Summer crops grow vigorously, which is the season that needs a lot of water. Compared with the same latitude zone, the seasonal distribution of precipitation in China is similar to that in the subtropical eastern United States and India, but compared with North Africa at the same latitude, it belongs to an extremely dry desert climate, with an annual rainfall of only110 mm. Compared with other parts of the world at the same latitude, the temperature in China is low in winter and high in summer, and annual range is large, and the precipitation is concentrated in summer, which are the characteristics of continental climate. Therefore, the monsoon climate in China is continental, which is also called continental monsoon climate.

Although the climate in China is beneficial to the development of agricultural production in many ways, it also has disadvantages. Frequent disastrous weather in China often has adverse effects on China's production, construction and people's lives. Among them, drought, flood, cold wave and typhoon are the main disastrous weather that have great influence on China.

Drought and flood disasters occur once a year on average in China, mostly in the north and also in the south. In summer and autumn, the southeast coast of China is often hit by tropical storms-typhoons. In autumn and winter in China, cold air from Mongolia and Siberia keeps going south. When the cold air is particularly strong, the temperature drops suddenly and a cold wave appears. Cold wave will cause low temperature, strong wind, sandstorm, frost and other disasters.