Cyclone

Cyclone refers to a large scale air mass that rotates around a strong center of low atmospheric pressure. Cyclones are characterized by inward spiraling winds that rotate about a zone of low pressure. The largest low-pressure systems are called synoptic scale systems, typically seen in the form of tropical cyclones, hurricanes, or typhoons in various parts of the world. The core of a cyclone is often warmer than the surrounding atmosphere, which helps to drive their movement and development. Cyclones can cause widespread destruction when they make landfall, due to their high winds, heavy rainfall, and potential to trigger storm surges and flooding.

Types of Cyclones

Cyclones can be classified into two main types based on their location and characteristics: tropical cyclones and extratropical cyclones.

Tropical Cyclones

Tropical cyclones form over warm ocean waters near the equator and are known by different names in different regions, including hurricanes (in the Atlantic and Northeast Pacific), typhoons (in the Northwest Pacific), and simply cyclones in the South Pacific and Indian Ocean. These systems are fueled by the heat released when moist air rises and condenses. The Saffir-Simpson Hurricane Wind Scale is commonly used to categorize the strength of these systems.

Extratropical Cyclones

Extratropical cyclones, also known as mid-latitude cyclones, form at higher latitudes, typically as a result of the temperature contrast between polar and tropical air masses. These systems can bring heavy rain or snow, strong winds, and changing weather patterns. They are more common than tropical cyclones and can occur at any time of the year.

Formation

The formation of cyclones involves several factors, including warm sea surface temperatures, atmospheric instability, high humidity in the lower to middle levels of the troposphere, and a pre-existing low-level focus or disturbance. The Coriolis effect plays a crucial role in the development and direction of cyclones, causing them to spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

Impacts

Cyclones can have devastating impacts on the environment, economies, and human life. Their strong winds can cause extensive damage to buildings and infrastructure, while heavy rains can lead to flooding and landslides. In coastal areas, storm surges can inundate low-lying areas, causing further damage and loss of life. The aftermath of a cyclone can also lead to long-term issues such as food shortages, water contamination, and disease outbreaks.

Preparedness and Response

Effective preparedness and response measures can significantly reduce the impact of cyclones. These include early warning systems, evacuation plans, and public education on cyclone safety. Building codes and infrastructure improvements in vulnerable areas can also enhance resilience to cyclone-related hazards.

See Also

• Meteorology
• Climate change
• Disaster management
• Emergency preparedness

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Cyclone

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  Low pressure system over Iceland

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  Post-Tropical Cyclone Nuri and Typhoon Haiyan surface analysis

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  Baroclinic leaf phase cyclogenesis

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  Hurricane profile

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  UK Cyclone

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  Sea of Japan polar low 2009-12-20 0213Z

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  Alex 2016-01-13 1530Z

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  2017 Atlantic hurricane season summary map

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  Cyclone Catarina from the ISS on March 26, 2004

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  Maria 2017-09-19 2115Z

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  Patricia 2015-10-23 1730Z (Worldview)

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  Haiyan Nov 7 2013 1345Z (Borderless)