How are "frontal rain, typhoon rain, convective rain and topographic precipitation" formed respectively?

When the front is active, the warm and humid airflow rises. As the temperature decreases, water vapor will cool and condense, forming clouds and causing rainfall. This kind of rain is called frontal rain.

Typhoon is rain brought by storms in tropical oceans. This kind of storm is composed of an unusually strong hot and humid air mass in the ocean. Where the typhoon passes, the rainstorm is fierce, which can reach hundreds of millimeters at a time, and sometimes it can reach more than 1000mm, which is very easy to cause disasters. This is called typhoon rain.

Convective precipitation is precipitation from convective clouds. Specifically, when the convection develops to a certain extent, the precipitation particles in the cloud can no longer be supported by the updraft and fall.

In topographic precipitation, when the moist air mass moves forward, it is blocked by high mountains, and the airflow is forced to rise slowly, resulting in adiabatic cooling and condensation. The rainfall thus formed is called topographic precipitation.

Extended data

First, the characteristics of frontal rain

The first feature of frontal precipitation is its large horizontal range, which often forms a large-scale banded precipitation area along the frontal surface, called precipitation zone.

With the seasonal movement of the average position of the front, the position of the precipitation belt also moves; Another feature of frontal precipitation is that it lasts for a long time, because the rising speed of layered clouds is small, and the water content and precipitation intensity are relatively small. There is little precipitation in some pure water clouds. If there is precipitation, it is also Mao Mao rain.

However, the frontal precipitation lasts for a long time, ranging from a few days to 10 day and a half, sometimes exceeding 1 month. "Rain after rain in Qingming Festival" is an accurate and appropriate description of frontal precipitation in Jiangnan area of China.

Second, the difference between convective rain, frontal rain and typhoon rain

1, convective rain

The air near the surface layer is heated or the upper air is strongly cooled, so that the lower air rises. After reaching high altitude, the precipitation formed by the cooling and condensation of water vapor in the air is convective rain. It is often windy before convective rainfall, accompanied by lightning.

Features: short rainfall time and high intensity.

2. Forerain

When the warm air mass meets the cold air mass, the warm air mass is lifted. In the process of uplift, the precipitation formed by the cooling and condensation of water vapor in the air is frontal rain.

Features: Long rainfall time and low intensity.

3. Typhoon storm

The precipitation phenomenon caused by typhoon activity is typhoon rain.

Features: Typhoon landing often produces heavy rain.