Meteorological Science: What are the origins and distributions of typhoons?

The source of typhoon is distributed in the vast low latitude ocean surface of the northwest Pacific Ocean.

The tropical disturbance in the northwest Pacific intensified and developed to the initial position of typhoon, with a relatively concentrated zone in latitude and longitude.

In the east-west direction, tropical disturbances develop into

Typhoons are relatively concentrated in four sea areas.

The sea surface in the north-central South China Sea

Sea surface east of Philippine Islands and near Ryukyu Islands

The waters near Mariana Islands.

Sea area near Marshall Islands

Distribution of typhoons

There are certain conditions for the formation of typhoons. Therefore, its origin is also in a specific area. Typhoon is a "specialty" in tropical oceans.

It often occurs on the tropical ocean surface of 5-25 degrees north and south latitude.

Typhoons in the northern hemisphere mainly occur from July to 10. Other seasons are obviously reduced.

After the typhoon is formed, it has a certain moving path. Take typhoons in the northwest Pacific as an example: in winter and spring (June 1 1 to May of the following year), typhoons mainly turn north on the sea east of eastbound 130, enter the south-central South China Sea or land in southern Vietnam south of north latitude 16, and a few typhoons land in eastbound120-.

In the midsummer season from July to September, the typhoon path further deviates to the northwest, and the coastal provinces of China from Guangxi to Liaoning may be hit by typhoons in this season; During the transition season from June to June in 10, typhoons mainly turn north on the sea east of 125, and the westbound path is relatively north, between 15-20, and a few can land in Guangdong, Taiwan Province, Fujian, Zhejiang and other places.

In addition to counterclockwise rotation (in the northern hemisphere), typhoon movement is mainly guided by large-scale weather systems such as subtropical high and long wave trough.

Under normal circumstances, the typhoon moves smoothly. However, there are also a few typhoons with tortuous paths, such as stagnation, gyration, sharp turn, sudden change of moving speed and uncertain path.