Dust Storms and its Impact on Climate.
WHAT ARE DUST STORMS? Dust storm can be explained as a phenomenon when strong winds carry dust over an extensive area . Sand and dust storms are common meteorological hazards in arid and semi-arid regions. They are usually caused by thunderstorms – or strong pressure gradients associated with cyclones which increase wind speed over a wide area. Dust storms arise when a gust front or other strong wind blows loose sand and dirt from a dry surface . Fine particles are transported by saltation and suspension , a process that moves soil from one place and deposits it in another. These strong winds lift large amounts of sand and dust from bare, dry soils into the atmosphere, transporting them hundreds to thousands of kilometres away. Sand and dust particles are distinguished by their grain size . Storms carrying bigger particles are known as Sand Storm whereas those carrying smaller are called dust Storms . Marginal dry lands are increasingly a source of major dust storms. These areas