How do tornadoes start? Detailed answer

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How do tornadoes start? Detailed answer

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How do tornadoes start?

Almost everyone had to get into an ordinary storm with thunder and strong gusts of wind. There are, however, storms that simultaneously cover an area of thousands of square kilometers. One type of such storm is called a cyclone. During a cyclone, winds blow from everywhere towards the center of the storm, where there is an area of low pressure.

It is curious that these winds form a giant air spiral, which "twirls" clockwise in the southern hemisphere of the Earth, and counterclockwise in the northern hemisphere. A tornado is just a special kind of cyclone. It is caused by the same causes as ordinary storms, but only manifested with unusual force.

At first, due to some circumstances, a powerful vertical draft of air appears. It begins to rise rapidly, which leads to the emergence of horizontal air currents - winds blowing in opposite directions around a vertical stream.

As a result, a whirlwind appears - a narrow column of air, spiraling upwards, rapidly moving along the surface of the earth. When this happens, the centrifugal force throws the air against the outer "walls" of the vortex, in the center of which there is a low pressure area.

The pressure drop is so great that this area begins to look more and more like a vacuum pump. This is one of the main dangers of tornadoes. He tears out the walls of houses with such force, sucking them into the sky, that they collapse as if they were made of cardboard. Winds that form a whirlwind have no less destructive power. Sometimes they reach speeds of almost 500 km / h, and nothing can resist them.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Who is David Livingston?

David Livingstone was born in 1813 in Blantare, Scotland. At the age of ten, he went to work in a cotton-spinning factory and bought a primer in Latin with the first money he earned. Despite the exhausting work, he managed to attend night school and also studied a lot at home. When he was 20 years old, he was influenced by the descriptions of missionaries he read in Asia and decided to devote his life to alleviating the fate of people who lived in extreme need and poverty. He went to study at a college in Glasgow and, following the results of his final examinations, was admitted to the London Missionary Society. In London, he also managed to complete his medical education.

In addition to medicine, he studied theology, botany, zoology and astronomy - sciences that were to be useful to him in the future. In 1841, Dr. Livingston arrived in the city of Cape Town and spent the next 30 years of his life traveling along and across the entire African continent. During this time he managed to make many discoveries. Among them, the most significant are the discovery of the mighty Victoria Falls and exploration of the upper reaches of the Congo River. His meager earnings and money from the sale of his books were barely enough for him to equip and finance new expeditions.

Livingston's last journey ended tragically. He was weakened by tropical fever, and the native porters left him alone without food and medicine. The rescue expedition sent under the leadership of N.M. Stanley, managed to find him. Stanley tried to convince Livingston to return with him, but he refused and, barely gaining strength, went west in search of the source of the Nile. On the way, he fell ill with dysentery with complications. His health continued to deteriorate, and on May 1, 1873, Dr. Livingston died.

The Aboriginal helpers who remained loyal to him took care to preserve his remains. They carried the body of a brave traveler across half of Africa and delivered it to the nearest English colony. Then it was transported to England and buried with honor in the cemetery in the famous Westminster Abbey.

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Olympus introduced the Stylus SH-1, the world's first compact camera equipped with a five-axis image stabilizer.

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The Stylus SH-1 features a 1/2,3-inch (6,17x4,55mm) BSI-CMOS sensor with 16 megapixels effective pixels, a TruePic VII image processor, and a 24x optical zoom lens (focal length of 25-600mm equivalent for 35mm film cameras). The light sensitivity is ISO 100-6400, the shutter speed range is 1/2000-30 s. There is a three-inch fixed display with touch control support, an SD / SDHC / SDXC memory card slot, a built-in Wi-Fi 802.11b / g / n wireless network adapter, a stereo microphone, USB 2.0 and HDMI interfaces.

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