Chinese name: equatorial convergence zone mbth: ITCZ, tropical convergence zone area: tropical area classification: the attribution of trade wind zone and windless zone: the characteristics of airflow convergence zone: the influence of major large-scale weather systems in tropical areas: the major consequences of weather changes in tropical areas: explanation, location, type, windless zone, trade wind zone, characteristic equatorial convergence zone (ITCZ), also known as tropical convergence zone, is the northern and southern hemispheres. It is also a major and persistent large-scale weather system in the tropics, and sometimes it can even circle the earth. Its movement, change and intensity have great influence on the long, medium and short-term weather changes in tropical areas. The occurrence and development of typhoons are also closely related to the equatorial convergence zone. Location Its location moves north and south with the seasons. The average location in June is about 5 S 1, and in July it is about12-15 n. In the ocean, the range of motion is small, and the part near the mainland has a larger range of motion. For example, in the longitude from the southeast coast of China to Indo-China Peninsula, the range of motion is between 25 N and10 s, and the amplitude is 35 latitude. According to the convergence of airflow on the weather map, the equatorial convergence zone can be divided into two types: one is windless zone and the other is trade zone. There is no wind in the windless area. In the convergence area, the ground is basically calm. The convergence area is between the east wind area and the west wind area, which is the transition area between the east wind and the west wind. The trade wind area is the area where the northeast trade wind and the southeast trade wind converge into an asymptote, where the airflow converges and the air pressure is the lowest. The equatorial convergence zone of the trade wind zone type is generally located near the equator, and its convergence airflow consists of two easterly airflow from the southern hemisphere and the northern hemisphere respectively. The equatorial convergence zone in the windless area is generally located in the north or south of the equator, and its convergence airflow consists of an easterly trade wind airflow from the northern (southern) hemisphere and another easterly trade wind airflow from the southern (northern) hemisphere.
Cross-equatorial airflow composition. Due to the geostrophic bias current, the cross-equatorial airflow gradually turns into westerly wind (sometimes called equatorial westerly wind), thus forming a convergence zone between the easterly belt and the westerly belt, and the transition zone between the east and west wind belts presents a windless (or windless) zone. This equatorial convergence zone, also known as monsoon trough or monsoon convergence zone, is usually more active than the equatorial convergence zone in the trade wind area and has a more vigorous development of the convective cloud system. They are usually important sources of tropical clouds and tropical cyclones. Intertropical convergence zone is characterized by high temperature and humidity, rising airflow convergence, which is beneficial to the development of convective cloud system, and there are many thunderstorms. Because the convergence zone is often disturbed, it is beneficial to the development of tropical depression.