Why are the four distinctive seasons of spring, summer, autumn and winter dry and windy?

Spring is the transitional season between winter and summer, and the cold and warm air is equally strong and active. Wang Anshi once used such a poem to describe his ambivalence about the spring climate: "The spring breeze is sometimes good and sometimes bad, so the flowers can't bloom, and the flowers are blown down by the wind." This sentence shows that the weather is changeable in spring. Specifically, the climate in spring has the following characteristics:

The temperature changes greatly. In spring, Vientiane is renewed and full of vitality, but spring is also the period when the weather changes the most, from warm to cold, and the temperature changes suddenly. The temperature difference in a day is the largest in spring. Taking Beijing as an example, the difference between the highest temperature and the lowest temperature reached 26.8℃ on May 3rd, 1966. Therefore, in spring, we should listen to the weather forecast in time, pay attention to the weather changes and increase clothes in time.

In spring, the air is dry and windy, and it is in the adjustment period of atmospheric circulation, with frequent cold and warm air activities and great temperature changes. As we mentioned earlier, spring is the transitional season between winter and summer, and the cold and warm air is equally strong and active, so windy weather often occurs, especially in northern China, which is characterized by alternating north-south winds and strong winds. Generally speaking, the phenomenon of frequent north-south winds can be improved after May. The arrival of a windy weather brings cold air, the temperature drops, and at the same time reduces the air humidity, which is easy to cause diseases such as colds, rhinitis, arthritis, mental illness and skin diseases.

It is dusty in the north. In spring, with the temperature rising, if there is little precipitation, the ground is dry and the wind comes, it is easy to have dusty weather. Meteorology, sandstorm weather is divided into floating dust, sand blowing and sandstorm. In northern China, March and April are the frequent periods of dusty weather. The result of sandstorm weather is that the concentration of suspended particles in the atmosphere, especially inhalable particles harmful to human body, increases sharply, which leads to the decline of air quality. These suspended particles contain a variety of allergens, which are easy to induce allergic reactions in people with allergic constitution, thus causing allergic diseases such as allergic dermatitis, allergic rhinitis, asthma and urticaria. Allergies must stay away from these allergens and pay attention to personal preventive measures when going out.

It is rainy in the south. In early spring or late autumn in China, it rained continuously for several days or even months, and the weather was cold and there was almost no sunshine. Also known as low temperature and continuous rain. It is often rainy and rainy in southern spring, with low temperature and warm temperature appearing alternately. Humidity in rainy season is high, which is easy to cause rheumatoid arthritis. In addition, it has a great influence on people's psychological diseases. In spring, special attention should be paid to adapting to nature and climate change.