Cyclonic raincycloneOr rainfall caused by low pressure transit.It can be divided into non frontal rain and frontal rainLow pressure areaCaused by convergenceairflowIt is caused by rising to cool and condense the water vapor contained therein.Among them, ChinaprecipitationThe main type is frontal rain.[1]
Chinese name
Cyclonic rain
Foreign name
cyclonic rain
Definition
Rainfall brought by cyclone or low pressure transit
Cyclonic rain refers to the rainfall brought by cyclones or low pressure transit, which can be divided into non frontal rain andFrontal rainThe former is caused by the air flow rising due to the convergence of cyclones towards the low-pressure area, which makes the water vapor contained therein cool and condense.Among them, the main type of precipitation in China is frontal rain.[1]
Formation and characteristics
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The rainfall generated with the passage of cyclones or low pressure is called cyclonic rain, which is one of the important weather systems of seasonal rainfall in China.Cyclone rain can be divided into non frontal rain and frontal rain.The non frontal cyclonic rain is caused by the convergence of air flow towards low pressure and the rise of air flow. The frontal cyclonic rain is caused by the cyclonic waves on the front.
Cyclone wave is a frontal wave in the lower atmosphere.The cyclone wave occurs in the temperate zone, so it is called the extratropical cyclone wave. When the cyclone wave develops to a certain depth, it forms a cyclone.The Yangtze Huaihe cyclone is a frontal cyclone that occurs in the Yangtze Huaihe River basin and Hunan Jiangxi region. It appears more in spring and summer, especially in June and July during the plum rain period. It is one of the important weather systems that cause heavy rain in the Yangtze Huaihe region.[2]
Distribution area
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Most areas in China are temperate zones and belong to the intersection area of south-north airflow. Cyclone rain is extremely developed.Cyclone rain accounts for more than 60% in all regions, more than 80% in central and northern China, and 70% even in the northwest inland.Most cyclones in China occur in the east of the plateau.Mongolia cyclone, Northeast depression and Yellow River cyclone are formed in the north.After the formation of cyclones in China, they generally move to the northeast and go out to the seaPlum RainIs the polar air mass andTropical ocean air massIt was caused by the rendezvous in Jiangnan area.
