Where are cyclones form?

Answer 1

There is no type of weather event called a "sand cyclone" though there are two things this term could possibly refer to.

The first is a dust devil, a small vortex that somewhat resembles a tornado as it picks up dust. Dust devils form as the sun heats the ground, creating a layer of superheated air that can be as hot as 140 degrees Fahrenheit (60 degrees Celsius). This air will naturally tend to rise. As the rising air, called an updraft, develops it may encounter an eddy from the wind going over buildings, vegetation, or uneven terrain. The updraft pulls in surrounding air, causing the eddy to contract and intensify. The updraft spins and strengthens, lifting loose dust, and the dust devil forms.

There are also dust storms. These can form from virtually any source of strong wind moving over large amounts of loose soil. These winds can be produced by a passing cold front, or the outflow of a strong thunderstorm.

Answer 2

Cyclones are formed in hurricanes and sometimes tornadoes .

Answer 3

Simple explanation:

As warm, moist air over the ocean rises up from the ocean surface, there is less air left near the surface, and this causes an area of lower air pressure below. The air around this region has higher air pressure, and so it rushes in to fill the low pressure area. This air also becomes warm and moist and so it rises, too. The cycle keeps going. Warm air rises, the surrounding air swirls in to take its place, and so on. When the warm moist air rises, it cools off, and the water in the air forms clouds. The whole system of clouds and wind spins and grows, because it is being constantly fed by the ocean's heat and water evaporating from the surface.

More detailed explanation:

Cyclones (including typhoons and hurricanes) are caused by warm tropical moisture bearing clouds developing in open oceans or seas. Cyclones can only form over warm waters in the tropical regions of the oceans where the sea temperatures are 26.5 degrees Celsius or higher (around 80 degrees Fahrenheit). They occur in areas of very low pressure when air that is heated by the sun rises rapidly, and becomes saturated with moisture which then condenses into high thunderclouds. As the atmosphere becomes favorable for development (no wind shearing in the higher parts of the atmosphere), normal thunder storms clump together.

When the hot air rises, cooler air rushes in to fill the area left vacant by the hot air. The Coriolis effect of the Earth spinning on its axis causes the air to spiral upwards with considerable force. This in turn causes the winds to rotate faster, causing the tropical low to deepen in intensity into a tropical depression, and eventually a cyclone which is anywhere between hundreds of kilometres to thousands of kilometres wide.

Cyclones are also characterised by strong winds, yet in their centre is a clear, calm region called the 'eye.' When the cyclone continues its course, and the winds return from the other direction, they may seem to be more violent. The winds are not just rotating; there is also the effect of the warmer air continually rising and cold air rushing in. That is why the winds are so strong, and seem to move in all directions.

Winds gusts in a category 5 cyclone can exceed 280 kph, and a fully developed cyclone pumps out about two million tonnes of air per second.

Answer 4

Tropical cyclones form when a low pressure area develops or moves out over warm ocean water. The moisture that evaporates from the ocean fuels the system causing it to intensify. As the system intensifies it becomes better organized. Once a closed circulation develops the system becomes a tropical cyclone. As it gains further strength the cyclone may reach higher levels of classification.

Answer 5

Cyclones develop over warm seas near the Equator. Air heated by the sun rises very swiftly, which creates areas of very low pressure. As the warm air rises, it becomes loaded with moisture which condenses into massive thunderclouds. Cool air rushes in to fill the void that is left, but because of the constant turning of the Earth on its axis, the air is bent inwards and then spirals upwards with great force. The swirling winds rotate faster and faster, forming a huge circle which can be up to 2,000 km across. In the middle of the storm is a calm, cloudless area called the eye, where there is no rain, and the winds are fairly light........

Answer 6

air moves from centers of high pressure toward a center of low pressure in a spiraling pattern

Answer 7

The rotating winds of a cyclone form an eye.

Answer 8

low pressure areas

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