Causes of tongue cold in Tongan Bay, Xiamen

The cause of cold tongue in Tongan Bay of Xiamen is the formation of ground cold advection. Tongan Bay has formed a cold tongue in the southeast and northwest direction, which gradually strengthens and forms a cold advection on the ground. Tongan Bay has formed a southeast-northwest cold tongue, which is gradually strengthened to provide cold advection near the ground for the airport. Cold shed is a cold (wet) tongue in meteorological specialty, which means that a certain isoline in the weather map is U-shaped, similar to the shape of tongue, indicating the cold (or high humidity) characteristics of this part of the area.