Definitions for cyclones
cy·clones

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1. cyclones

   In meteorology, a cyclone () is a large air mass that rotates around a strong center of low atmospheric pressure, counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere as viewed from above (opposite to an anticyclone). Cyclones are characterized by inward-spiraling winds that rotate about a zone of low pressure. The largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale (the synoptic scale). Warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes, and dust devils lie within smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the tropical upper tropospheric trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars, Jupiter, and Neptune. Cyclogenesis is the process of cyclone formation and intensification. Extratropical cyclones begin as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract and form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, extratropical cyclones occlude as cold air masses undercut the warmer air and become cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the subtropical jet stream. Weather fronts mark the boundary between two masses of air of different temperature, humidity, and densities, and are associated with the most prominent meteorological phenomena. Strong cold fronts typically feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines. Such fronts form west of the circulation center and generally move from west to east; warm fronts form east of the cyclone center and are usually preceded by stratiform precipitation and fog. Warm fronts move poleward ahead of the cyclone path. Occluded fronts form late in the cyclone life cycle near the center of the cyclone and often wrap around the storm center. Tropical cyclogenesis describes the process of development of tropical cyclones. Tropical cyclones form due to latent heat driven by significant thunderstorm activity, and are warm core. Cyclones can transition between extratropical, subtropical, and tropical phases. Mesocyclones form as warm core cyclones over land, and can lead to tornado formation. Waterspouts can also form from mesocyclones, but more often develop from environments of high instability and low vertical wind shear. In the Atlantic and the northeastern Pacific oceans, a tropical cyclone is generally referred to as a hurricane (from the name of the ancient Central American deity of wind, Huracan), in the Indian and south Pacific oceans it is called a cyclone, and in the northwestern Pacific it is called a typhoon. The growth of instability in the vortices is not universal. For example, the size, intensity, moist-convection, surface evaporation, the value of potential temperature at each potential height can affect the nonlinear evolution of a vortex.

How to pronounce cyclones?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say cyclones in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of cyclones in Chaldean Numerology is: 3

2. Pythagorean Numerology

   The numerical value of cyclones in Pythagorean Numerology is: 6

Examples of cyclones in a Sentence

1. Jim Kossin:

   Tropical cyclones are fairly random animals, and they respond to the random nature of the atmosphere at any given time, but certainly, this steady warming of the ocean that's been happening in the Atlantic because of the combination of greenhouse gas increases and the particulate pollution decreases, that has a profound effect — and the changes to the particulate pollution have a much more dramatic effect on the hurricanes.

2. Ian Fry:

   The (Intergovernmental Panel on Climate Change) have stated in their most recent report that these sorts of events are going to get worse as a result of climate change, and in fact they are getting worse, there's clearly a human imprint on these cyclones now, and there needs to be something done about it.

3. Gabriel Vecchi:

   This study shows very nicely that the impact of aerosols is not isolated to the Atlantic, but involves a global shift in the distribution of tropical cyclones, aerosols are among the most uncertain elements of the climate system, so I think that there should — and I predict there will — be follow-on studies that explore the sensitivity of the results to a range of aerosol-related uncertainties.

4. Nicholas Scofield:

   We don't withdraw home contents insurance when the threat of cyclones change because of a La Nina or an El Nino (weather phenomena).

5. Roger Shaw:

   Being in the tropics with cyclones and the rest adds complexity, but we still need to do more.

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Cyclones