How to judge cyclone and anticyclone?

Judgment of cyclone: In the southern (northern) hemisphere, the horizontal airflow in the atmosphere is a large vortex rotating counterclockwise (clockwise). At the same height, the air pressure in the center of the cyclone is lower than that around it, which is also called low pressure. Cyclones are similar to circles or ellipses, and their sizes vary greatly. In cyclones, the weather often changes dramatically, which is the weather system that people are most concerned about and studied at the earliest. Usually classified according to the main areas or thermal structures where cyclones are formed and active. According to the region, it can be divided into temperate cyclone, tropical cyclone and polar cyclone vortex According to the thermal structure, it can be divided into cold air rotation and hot low pressure. ?

Judgment of anticyclone: anticyclone is a large-scale air vortex occupying three-dimensional space. In the northern hemisphere, the airflow in the anticyclone area rotates clockwise from the center to the outside and counterclockwise in the southern hemisphere. In the weather map, the anticyclone is a high-pressure area where the isobar is closed and the pressure value decreases from the center to the outside, so it is also called high pressure. In the surface weather map, the range of anticyclone is represented by the outermost closed isobar. Its horizontal range is much larger than that of cyclone. When it is strong, it can often be compared with the whole continent or ocean, and small anticyclones are hundreds of kilometers. The intensity of anticyclone is expressed by the central pressure value. The higher the central air pressure, the stronger the anticyclone force. The air pressure at the surface anticyclone center is generally 1020 ~ 1030 hectopascals, and the air pressure at the center of the strongest anticyclone can reach 1080 hectopascals. The intensity of anticyclone changes with time. When the air pressure in the center of the anticyclone gradually increases with time, it is said that the anticyclone is "strengthened"; When the air pressure in the center of the anticyclone decreases with time, it is said that the anticyclone is "weakened". According to thermal conditions, anticyclones can be divided into cold anticyclones and warm anticyclones. Geographical location can be divided into temperate anticyclone and subtropical anticyclone.

Look at the pressure level: the central pressure is lower than the surrounding cyclones; The central air pressure is higher than the surrounding area, which is an anticyclone.

Look at the vertical airflow direction: the temperature in the vertical direction rises into a cyclone; The airflow sinks into an anticyclone.

Look at the weather: what can bring rainy weather is cyclone; It is an anticyclone that brings good weather.