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Tropical cyclones - the genesis and structure |
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Written by Administrator
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Monday, 05 October 2009 |
 Cyclones have a complex nature, as evidenced by the fact that only one in ten chance circumstances conducive to hurricane formation leads to its creation. Feedback about their origins are not fully compatible. Scholars emphasize the importance of the three processes involved in creating the structure of typhoon. They are: convective processes, abrasion of different air masses, and the impact of the higher layers of the troposphere. Bottom to the center of coming moist air, which rises and then is discharged up to the outside. In the initial phase, this movement swings the Coriolis force, initiating vortex disruption.
At the pervasive role of convection surrounding the eye, and a compact wall of the powerful cyclone cumulonimbus clouds clear evidence of a strongly uplifted clouds and violent rain. In the eye movements, in turn, coming down, do not allow the formation of clouds. The large drop in pressure in the eye of the cyclone convection theory explains the action of centrifugal force spinning air, which throws them out. At the same time in the lower layers of the supply is so skimpy that it does not compensate for loss in its entirety. Rising over the ocean air heated by the theory of the front must get to the higher latitudes where the Coriolis force starts to act, forcing the air mass to move around the spiral turbulence. Such conditions exist in moving both sides of the equatorial belt of convergence (convergence), sometimes referred to as the tropical front. Behind this theory supported by the fact that at low latitudes of the Atlantic and Pacific, where the front does not occur, there is no vortices also create cyclones. The creation of typhoons may play an important role of the higher layers of the troposphere. When it formed the central part of the eastern wave, which travels to the west (field pressure) comes to the horizontal. Deflection field force lines, giving the bay wave, slowly transforms into a vortex, which gives rise to tropical. Although in the hinterland of the eye hurricane wind speed is enormous, the whole system moves very slowly - do not exceed 25 km / h. Its speed increases at higher latitudes, where it is going. On the basis of multi-established observation that typhoons usually move in a parabolic path, avoiding the area of high pressure. Moving from east to west routes-like loops, etc. Sometimes the sine of the tropical cyclones have a more complex structure - made up of two turbulence: the primary and secondary. Primary vortex (larger diameter) formed on the surfaces of the ocean at low latitudes. While the secondary vortex is formed generally to the south of the main vortex when the latter enters the polar route. Its diameter is less than 120-150 km.
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Last Updated ( Tuesday, 27 October 2009 )
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