Special cases of cold fronts, warm fronts, quasi-stationary fronts, cyclones, and anticyclones, some typical ones

Cold fronts, warm fronts, and quasi-stationary fronts are three common types of meteorological fronts. Cyclones and anticyclones are two important weather systems. The following are their typical characteristics and examples:

1. Cold front: A front where cold air moves toward warm air is a cold front. When cold air meets warm air, phenomena such as rainfall and increased winds occur. Cold fronts are more common in the westerly belts of the Northern Hemisphere, such as the oceanic climate in Europe and the climate in the Great Lakes region of North America.

2. Warm front: A front where warm air moves toward cold air is a warm front. When warm air meets cold air, phenomena such as rainfall and warming occur. Warm fronts are more common in the easterly wind belts of the Northern Hemisphere, such as the monsoon climate of the North American Great Plains.

3. Quasi-stationary front: A quasi-stationary front refers to a front that stays in a certain area for a long time without moving. This kind of front usually appears between two air masses with similar properties, forming a narrow transition zone. Quasi-stationary fronts appear everywhere, but they are most typical during the plum rainy season in the Jiangnan region.

4. Cyclone: ​​Cyclone refers to a vortex phenomenon in the atmosphere, which is characterized by airflow sinking downward in the center and rotating around the center. Cyclones are one of the main factors that produce severe weather such as storms and rainfall. Tropical cyclones and extratropical cyclones are the two main types of cyclones. Tropical cyclones mainly occur in tropical and subtropical regions, such as hurricanes and typhoons; extratropical cyclones mainly occur in mid- and high-latitude regions, such as the Northeast Cold Vortex.

5. Anticyclone: ​​Anticyclone refers to an anti-vortex phenomenon in the atmosphere, which is characterized by airflow rising upward in the center and rotating around the center. Anticyclones are one of the main factors that produce sunny weather and downdrafts. Tropical anticyclones and extratropical anticyclones are the two main types of anticyclones. Tropical anticyclones mainly appear in tropical and subtropical regions, such as tropical dry anticyclones; temperate anticyclones mainly appear in mid- and high-latitude regions, such as Arctic cold anticyclones.