What month is the most tropical cyclone typhoon landing in China?

The most tropical cyclones and typhoons landed in China from July to September.

Tropical cyclone is a low-pressure vortex that occurs on the surface of tropical or subtropical ocean, and it is a powerful and profound tropical weather system. That is, a mesoscale or synoptic warm cyclone generated on the tropical ocean surface. It can be found in the western Pacific Ocean and its adjacent waters (typhoons), the Atlantic Ocean and the Northeast Pacific Ocean (hurricanes), the Indian Ocean and the South Pacific Ocean.

Tropical cyclones are common in summer and autumn, and their life cycle can be roughly divided into four stages: generation, development, maturity and extinction. Their intensity is divided into several grades according to the central wind speed, and they are observed as a huge spiral direct spread cloud system. Mature tropical cyclones have macro structures such as storm eye, eye wall and spiral rain belt. Non-landing tropical cyclones may last for 2 to 4 weeks until they leave tropical waters, and landing tropical cyclones usually die out quickly within 48 hours after landing.

Part of the reasons for the formation of typhoons

There is a pre-existing interference. Typhoons are all developed from the pre-existing tropical depression disturbance. According to China's statistics, the tropical cyclones in the western Pacific-South China Sea region come from four initial disturbances in intertropical convergence zone, accounting for 80% ~ 85%; East wind wave, accounting for about10%; The cut-off low pressure in the long wave trough at middle and high latitudes, or the cold vortex at high altitude, accounts for about 5%; Baroclinic disturbance accounts for less than 5%.

Warm ocean surface, the seawater temperature is higher than 26.5℃. The temperature and humidity of the upper and lower atmosphere in tropical oceans are mainly determined by the sea surface water temperature. The higher the SST, the higher the temperature and humidity of the lower atmosphere, and the more obvious the potential instability. Typhoons are formed on the warm ocean surface with SST ≥ 26 ~ 27℃. Generally speaking, the global tropical ocean surface meets this condition all year round, and only the SST in the equatorial southeast Pacific Ocean is ≤ 26.5℃ all year round, which is the main reason why there are no typhoons here.