The movement of air from high pressure area to low pressure areas is called wind.You can see wind at work as it blows dry leaves down the pavement or uproots trees during a storm.Sometimes when the wind blows gently you can even see it blowing away smoke or fine dust.At times wind can be so strong that it is difficult easy to hold an umbrella on a windly day.Think of some other examples when strong winds have created problems for you.Winds can be broadly divided into three types.
1. Permanent wind: The trade winds, westerlies and easterlies are the permanent winds.
These blow constantly throughout the year in a particular direction.
Major pressure belt and Wind System
2. Seasonal winds:These winds change their direction in different seasons.For example mansoons in India.
3. Local winds:These blow only during a particular period of the day or year in a small area.For example, land and sea breeze.Do you recall the hot and dry local wind of northern planes of India?It is called loo.
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