Why cold air can't cross Qiongzhou Strait

Geographical location, climatic conditions, cold air path and intensity, and marine environmental conditions of the Strait. 1. Geographical location and climatic conditions of Qiongzhou Strait: Qiongzhou Strait is located in Hainan Province in the south of China, adjacent to Beibu Gulf. The region has a tropical monsoon climate, with hot and humid summers and mild and humid winters. Due to the interaction between the land topography on both sides of the Taiwan Province Strait and the ocean waters, a special local climate, namely "Qiongzhou Strait Climate", has been formed in the Taiwan Province Strait. This climate is characterized by dry and cold weather in winter, hot and humid weather in summer, and relatively weak cold air activity.

2. The path and intensity of cold air southward: cold air flows from high latitude to low latitude. When cold air moves from north to south in winter, due to the influence of the topography on both sides of Qiongzhou Strait, some cold air will choose to bypass the strait on the east side of Hainan Island instead of crossing the strait directly. At the same time, the cold air will gradually weaken in the process of going south, especially when the cold air passes through a long distance and ocean waters, its intensity and influence range will be further reduced.

3. Marine environment of the Strait: Qiongzhou Strait is a relatively shallow water area with an average water depth of about 60 meters. This shallow water environment will have a certain impact on the direction and speed of water flow. In addition, complex ocean phenomena such as countercurrent or vortex in the strait also hinder the passage of cold air to some extent.