Cyclones: Meaning, Formation and its Causes
What are Cyclones? In meteorological terms, a cyclone is a large air mass that rotates around strong center of low atmospheric pressure. In other words, the atmospheric disturbances which involve a closed circulation around a low pressure center, anticlockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere are called as Cyclones. The early or weak phases of a cyclone are called as Tropical Depressions. Cyclones that occur in the Atlantic and North-East Pacific regions are called as hurricanes. Whereas, a cyclone occurring in the North -West Pacific region is called as Typhoons. How are Cyclones formed? Warm and moist air over the ocean rises upwards due to less density, leaving less air near the ocean surface. As a result, it starts to create a low pressure zone. Due to the surrounding high -pressure areas, air flows into this low-pressure zone and eventually warms up, forming a cycle. With the constant heat rising above warm air and evaporation process, the e...