МОУ «СОШ 1 г. Гурьевска» Tornado Выполнил ученик 9 «Б» класса Хамидуллин Олег Руководитель Конивцова С.Н.

What is a tornado? Tornado - narrow monstrous rotating column of air that extends from the thunderstorm cloud to the ground.

Because the wind is invisible, you can not always consider the tornado. Apparent symptom - a funnel, consisting of water droplets, sometimes items during its existence, the tornado is not always in contact with the ground.

Dust and debris in the rotating funnel to make the tornado visible and indicate the position of the tornado.

How tornadoes formed? Tornado of not ttunder origin do not appear as a result of a strong circulation of air masses over the entire area of the storm. These tornadoes are formed as a result of the vertical section of the rotation of air masses is happening near the surface of the earth, diameter of about 1-10 km, which was the cause of "bias" of the wind.

When upstream rises over the place like the state of air masses, there is a high probability of origin tornadoes. In the eastern part of Colorado common not thundering like tornado, because generated from the cold air from the mountain tops faces with hot air currents plains.

Tornado, resulting from strong thunderstorms - a global phenomenon, but mostly occur in the mid-latitude continental areas, where the cold north wind face with warm tropical. Tornadoes are common in the midwestern United States.

In Australia, each year gets more than 20 cases of tornadoes. However, this figure may be greatly understated, since many storms occur in unpopulated areas, as well as the tornado phenomenon of local character, people are simply unable to fix them.

Tornadoes are classified on a scale of F0-F5 (Scale Theodore Fyudzhita, researcher storms, the University of Chicago), depending on wind speed and destructive power. Score F0 corresponds to the wind speed not lower than 64km / h and not exceeding 117 km / h. The most destructive winds of category F5, whose speed reaches 418 km / h..

Very strong tornadoes are rare, but here in Australia there have been several cases. For example, a tornado formed in November 1989 in northern NSW, because one of them was estimated as F3 (possibly F4).

It is interesting that the Australian tornadoes often judged by the media as a mini-tornado or a mini-cyclones. Despite this tornado - a rare natural phenomenon of a localized nature, and usually very short- lived

Использованный материал: Фотографии ТОРНАДО.. Автор: HitMan. Опубликовано: Ураганы » Что такое торнадо? Ураганы » Что такое торнадо?