Few thinks About Wind

          

•  Few Thinks about WIND

                                          Wind is moving air on a large scale. On Earth, It consists of the bulk movement of gases. Wind is caused by differences in air pressure within our atmosphere. The air under high pressure moves toward areas of low pressure. The velocity of wind depends upon the pressure difference in the ambient air. The greater the difference in pressure, the faster the air flows. Also the air does not flow directly from high to low pressure, but it is deflected to the right (in the Northern Hemisphere; to the left in the Southern Hemisphere), so that the wind flows mostly around the high and low pressure.

                                   Air may not seem like anything at all; in fact, we look right through it all the time, but during a windstorm, air really makes its presence known. Wind is able to lift roofs off buildings, blow down power lines and trees, and cause highway accidents as gusts push around cars and trucks. The winds are generally classified by its spatial scale, their velocity, the direction, the forces caused by them, the regions at which they occurred and the effects of them. In meteorology winds are mostly referred to according to their strength and direction. Short bursts of high speed wind are termed as gusts. Strong winds of intermediate duration (around one minute) are termed squalls. Long-duration winds have various names associated with their average strength,  such as breeze, Gale, Strom, Hurricane and typhoon.

                                  Wind occurs on a range of scales, from thunderstorm flows lasting tens of minutes, to local breezes generated by heating of land surfaces and lasting a few hours, to Global winds resulting from the difference in absorption of solar energy between the climate zones on Earth. The two main causes of large scale atmospheric circulation are the differential heating between the equator and the poles, and the rotation of the planet. Within the tropics, thermal low circulations over terrain and high plateaus can drive monsoon circulations. In coastal areas the sea breeze /land breeze cycle can define local winds; in areas that have variable terrain, mountain and valley breezes can dominate local winds.

•   Facts about WIND

Power of WIND

 The wind affects the Earth’s speed of rotation. During the northern hemisphere winter, the stronger westerly winds that build up in the Northern Hemisphere, combined with frictional drag at the Earth's surface, actually produce a very small, but measurable, increase in the speed of rotation of the Earth.

WIND speed’s world record

   The highest wind speed on the surface of earth was 103.27(371.76Kmph or 231mph) on Mount Washington’s high elevated weather station.

                    More recently, sophisticated Doppler radar has been used to measure winds, recording a wind speed of 318 mph in an Oklahoma tornado in 1999. That’s faster than the top speeds of Japanese bullet trains and over three times quicker than the fastest baseball pitch.