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| Name | Jet Stream and its affect on Indian monsoon🌧 3D animated video @lollypolly20 |
| Video Uploader | Video From LOLLY POLLY |
| Upload Date | This Video Uploaded At 15-12-2022 05:44:19 |
| Video Discription | Jet Streams- Part-1 https://youtu.be/Bj7sIFn4eBo?si=bpMP3_hj48cSWhRA Features of Jet streams - Part-2 https://youtu.be/Glba99dosjw?si=AxctNm1K3r8dn_Pu Jet streams are fast flowing, narrow meandering air currents in the atmosphere of the Earth. Jet streams on earth are westerly winds as in flowing west to east and may start, stop and split into two or more streams. The discovery of the jet stream can be traced back to the explosion of Krakatoa volcano in 1883. After the eruption, weather observers tracked and mapped the effects of the sky for several years. This phenomenon was termed as the “equatorial smoke stream”. Similar phenomenon was observed by Japanese meteorologist, Wasaburo Oishi in the 1920s near Mt. Fuji. The American pilot Wiley Post is credited with the discovery of jet streams when he became the first pilot to fly around the world in 1933. He managed this feat through a pressurized suit that allowed him to fly above 6200 meters. Many sources credit real understanding of the nature of jet streams to regular and repeated flight-path traversals during World War II. The polar jets are the strongest jet streams at 9-12 km above sea level and at higher latitude and somewhat weaker subtropical jets at 10-16 km. The Northern Hemisphere and the Southern Hemisphere each have a polar jet and a subtropical jet. What are the causes of Jet Stream? The jet streams are strongest under the tropopause. If two air masses of different temperatures or densities meet the resulting pressure difference caused by the density difference is highest within the transition zone. Undercutting sub-tropical air masses by polar air masses leads to the formation of polar jet streams. This leads to surface low pressure and altitude high pressure. The absence of friction at high altitude allows free response of air to the low pressure at high altitude. Uses of Jet Stream Jet Stream has its uses in aviation. It can be safely said that it is a crucial component. The jet stream around the northern polar regions is the most important one. It is also used for weather forecasting. The first commercial use of jet streams was on 18 November 1952 when a Pan American flight flew from Honolulu to Tokyo at an altitude of 7600 metres. The usual time to complete the journey was at 18 hours. WIth the use of jet streams it was cut down to 11.5 hrs. By cutting down on the flight time, jet streams help in cutting down costs for the airline industry. A phenomenon known as clear-air-turbulence (CAT) is often associated with jet streams, it is caused by vertical and horizontal wind shear. The CAT is at its strongest on the cold air side of the jet and just under the axis of the jet. This phenomenon can cause aircraft to lose control and plummet and does present a safety hazard for passengers. Other than use in aviation, scientists are also figuring out methods through which the wind energy can be harnessed through jet streams. Even 1% of it would be needed to meet the world’s energy needs at present although the technology to develop it will take decades to come to fruition. |
| Category | Education |
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